#54 support sort map keys

WIP: Tests to compare against stdlib

.idea/libraries/Go_SDK.xml

@@ -0,0 +1,10 @@
+<component name="libraryTable">
+  <library name="Go SDK">
+    <CLASSES>
+      <root url="file:///usr/local/go/src" />
+    </CLASSES>
+    <SOURCES>
+      <root url="file:///usr/local/go/src" />
+    </SOURCES>
+  </library>
+</component>

README.md

@@ -1,61 +1,56 @@
+[![rcard](https://goreportcard.com/badge/github.com/json-iterator/go)](https://goreportcard.com/report/github.com/json-iterator/go)
+
 jsoniter (json-iterator) is fast and flexible JSON parser available in [Java](https://github.com/json-iterator/java) and [Go](https://github.com/json-iterator/go)
 
-# Why jsoniter?
+# Benchmark
 
-* Jsoniter is the fastest JSON parser. It could be up to 10x faster than normal parser, data binding included. Shameless self [benchmark](http://jsoniter.com/benchmark.html)
-* Extremely flexible api. You can mix and match three different styles: bind-api, any-api or iterator-api. Checkout your [api choices](http://jsoniter.com/api.html)
-* Unique iterator api can iterate through JSON directly, zero memory allocation! See how [iterator](http://jsoniter.com/api.html#iterator-api) works
+![benchmark](http://jsoniter.com/benchmarks/go-benchmark.png)
 
-# Show off
+Source code: https://github.com/json-iterator/go-benchmark/blob/master/src/github.com/json-iterator/go-benchmark/benchmark_medium_payload_test.go
 
-Here is a quick show off, for more complete report you can checkout the full [benchmark](http://jsoniter.com/benchmark.html) with [in-depth optimization](http://jsoniter.com/benchmark.html#optimization-used) to back the numbers up
+Raw Result (easyjson requires static code generation)
 
-![go-medium](http://jsoniter.com/benchmarks/go-medium.png)
+| | ns/op | allocation bytes | allocation times |
+| --- | --- | --- | --- |
+| std decode | 35510 ns/op | 1960 B/op | 99 allocs/op |
+| easyjson decode | 8499 ns/op | 160 B/op | 4 allocs/op |
+| jsoniter decode | 5623 ns/op | 160 B/op | 3 allocs/op |
+| std encode | 2213 ns/op | 712 B/op | 5 allocs/op |
+| easyjson encode | 883 ns/op | 576 B/op | 3 allocs/op |
+| jsoniter encode | 837 ns/op | 384 B/op | 4 allocs/op |
 
-# Bind-API is the best
+# Usage
 
-Bind-api should always be the first choice. Given this JSON document `[0,1,2,3]`
+100% compatibility with standard lib
 
-Parse with Go bind-api
+Replace
+
+```go
+import "encoding/json"
+json.Marshal(&data)
+```
+
+with 
 
 ```go
 import "github.com/json-iterator/go"
-iter := jsoniter.ParseString(`[0,1,2,3]`)
-val := []int{}
-iter.Read(&val)
-fmt.Println(val[3])
+jsoniter.Marshal(&data)
 ```
 
-# Iterator-API for quick extraction
+Replace
 
-When you do not need to get all the data back, just extract some.
+```go
+import "encoding/json"
+json.Unmarshal(input, &data)
+```
 
-Parse with Go iterator-api
+with
 
 ```go
 import "github.com/json-iterator/go"
-iter := ParseString(`[0, [1, 2], [3, 4], 5]`)
-count := 0
-for iter.ReadArray() {
-    iter.skip()
-    count++
-}
-fmt.Println(count) // 4
+jsoniter.Unmarshal(input, &data)
 ```
 
-# Any-API for maximum flexibility
-
-Parse with Go any-api
-
-```go
-import "github.com/json-iterator/go"
-iter := jsoniter.ParseString(`[{"field1":"11","field2":"12"},{"field1":"21","field2":"22"}]`)
-val := iter.ReadAny()
-fmt.Println(val.ToInt(1, "field2")) // 22
-```
-
-Notice you can extract from nested data structure, and convert any type to the type to you want. 
-
 # How to get
 
 ```

any.go

@@ -1,427 +0,0 @@
-package jsoniter
-
-import (
-	"fmt"
-	"reflect"
-	"strconv"
-)
-
-type Any struct {
-	val   interface{}
-	Error error
-	LastAccessed interface{}
-}
-
-func MakeAny(val interface{}) *Any {
-	return &Any{val, nil, nil}
-}
-
-func (any *Any) Get(keys ...interface{}) interface{} {
-	ret, err := getPath(any.val, keys...)
-	any.LastAccessed = ret
-	if err != nil {
-		any.Error = err
-		return "";
-	}
-	return ret
-}
-
-func (any *Any) GetValueType(keys ...interface{}) ValueType {
-	ret, err := getPath(any.val, keys...)
-	any.LastAccessed = ret
-	if err != nil {
-		any.Error = err
-		return Invalid;
-	}
-
-	switch reflect.TypeOf(ret).Kind() {
-	case reflect.Uint8:
-		return Number;
-	case reflect.Int8:
-		return Number;
-	case reflect.Uint16:
-		return Number;
-	case reflect.Int16:
-		return Number;
-	case reflect.Uint32:
-		return Number;
-	case reflect.Int32:
-		return Number;
-	case reflect.Uint64:
-		return Number;
-	case reflect.Int64:
-		return Number;
-	case reflect.Int:
-		return Number;
-	case reflect.Uint:
-		return Number;
-	case reflect.Float32:
-		return Number;
-	case reflect.Float64:
-		return Number;
-	case reflect.String:
-		return String;
-	case reflect.Bool:
-		return Bool;
-	case reflect.Array:
-		return Array;
-	case reflect.Struct:
-		return Object;
-	default:
-		return Invalid
-	}
-}
-
-func (any *Any) ToString(keys ...interface{}) string {
-	ret, err := getPath(any.val, keys...)
-	any.LastAccessed = ret
-	if err != nil {
-		any.Error = err
-		return "";
-	}
-	switch ret := ret.(type) {
-	case uint8:
-		return strconv.FormatInt(int64(ret), 10);
-	case int8:
-		return strconv.FormatInt(int64(ret), 10);
-	case uint16:
-		return strconv.FormatInt(int64(ret), 10);
-	case int16:
-		return strconv.FormatInt(int64(ret), 10);
-	case uint32:
-		return strconv.FormatInt(int64(ret), 10);
-	case int32:
-		return strconv.FormatInt(int64(ret), 10);
-	case uint64:
-		return strconv.FormatUint(uint64(ret), 10);
-	case int64:
-		return strconv.FormatInt(int64(ret), 10);
-	case int:
-		return strconv.FormatInt(int64(ret), 10);
-	case uint:
-		return strconv.FormatInt(int64(ret), 10);
-	case float32:
-		return strconv.FormatFloat(float64(ret), 'E', -1, 32);
-	case float64:
-		return strconv.FormatFloat(ret, 'E', -1, 64);
-	case string:
-		return ret
-	default:
-		return fmt.Sprintf("%v", ret)
-	}
-}
-
-func (any *Any) ToUint8(keys ...interface{}) uint8 {
-	ret, err := getPathAsInt64(any, keys...)
-	if err != nil {
-		any.Error = err
-		return 0;
-	}
-	return uint8(ret)
-}
-
-func (any *Any) ToInt8(keys ...interface{}) int8 {
-	ret, err := getPathAsInt64(any, keys...)
-	if err != nil {
-		any.Error = err
-		return 0;
-	}
-	return int8(ret)
-}
-
-func (any *Any) ToUint16(keys ...interface{}) uint16 {
-	ret, err := getPathAsInt64(any, keys...)
-	if err != nil {
-		any.Error = err
-		return 0;
-	}
-	return uint16(ret)
-}
-
-func (any *Any) ToInt16(keys ...interface{}) int16 {
-	ret, err := getPathAsInt64(any, keys...)
-	if err != nil {
-		any.Error = err
-		return 0;
-	}
-	return int16(ret)
-}
-
-func (any *Any) ToUint32(keys ...interface{}) uint32 {
-	ret, err := getPathAsInt64(any, keys...)
-	if err != nil {
-		any.Error = err
-		return 0;
-	}
-	return uint32(ret)
-}
-
-func (any *Any) ToInt32(keys ...interface{}) int32 {
-	ret, err := getPathAsInt64(any, keys...)
-	if err != nil {
-		any.Error = err
-		return 0;
-	}
-	return int32(ret)
-}
-
-func (any *Any) ToUint64(keys ...interface{}) uint64 {
-	ret, err := getPathAsUint64(any, keys...)
-	if err != nil {
-		any.Error = err
-		return 0;
-	}
-	return uint64(ret)
-}
-
-func (any *Any) ToInt64(keys ...interface{}) int64 {
-	ret, err := getPathAsInt64(any, keys...)
-	if err != nil {
-		any.Error = err
-		return 0;
-	}
-	return int64(ret)
-}
-
-func (any *Any) ToInt(keys ...interface{}) int {
-	ret, err := getPathAsInt64(any, keys...)
-	if err != nil {
-		any.Error = err
-		return 0;
-	}
-	return int(ret)
-}
-
-func (any *Any) ToUint(keys ...interface{}) uint {
-	ret, err := getPathAsInt64(any, keys...)
-	if err != nil {
-		any.Error = err
-		return 0;
-	}
-	return uint(ret)
-}
-
-func (any *Any) ToFloat32(keys ...interface{}) float32 {
-	ret, err := getPathAsFloat64(any, keys...)
-	if err != nil {
-		any.Error = err
-		return 0;
-	}
-	return float32(ret)
-}
-
-func (any *Any) ToFloat64(keys ...interface{}) float64 {
-	ret, err := getPathAsFloat64(any, keys...)
-	if err != nil {
-		any.Error = err
-		return 0;
-	}
-	return ret
-}
-
-func (any *Any) ToBool(keys ...interface{}) bool {
-	ret, err := getPath(any.val, keys...)
-	any.LastAccessed = ret
-	if err != nil {
-		any.Error = err
-		return false;
-	}
-	typedRet, ok := ret.(bool)
-	if !ok {
-		any.Error = fmt.Errorf("%v is not bool", ret)
-		return false;
-	}
-	return typedRet
-}
-
-func (any *Any) IsNull(keys ...interface{}) bool {
-	ret, err := getPath(any.val, keys...)
-	any.LastAccessed = ret
-	if err != nil {
-		any.Error = err
-		return false;
-	}
-	return reflect.ValueOf(ret).IsNil()
-}
-
-func getPathAsInt64(any *Any, keys ...interface{}) (int64, error) {
-	ret, err := getPath(any.val, keys...)
-	any.LastAccessed = ret
-	if err != nil {
-		any.Error = err
-		return 0, err
-	}
-	switch ret := ret.(type) {
-	case uint8:
-		return int64(ret), nil;
-	case int8:
-		return int64(ret), nil;
-	case uint16:
-		return int64(ret), nil;
-	case int16:
-		return int64(ret), nil;
-	case uint32:
-		return int64(ret), nil;
-	case int32:
-		return int64(ret), nil;
-	case uint64:
-		return int64(ret), nil;
-	case int64:
-		return int64(ret), nil;
-	case int:
-		return int64(ret), nil;
-	case uint:
-		return int64(ret), nil;
-	case float32:
-		return int64(ret), nil;
-	case float64:
-		return int64(ret), nil;
-	case string:
-		intVal, err := strconv.ParseInt(ret, 10, 64)
-		if err != nil {
-			return 0, err
-		}
-		return intVal, nil;
-	default:
-		return 0, fmt.Errorf("%v is not number", ret)
-	}
-}
-
-func getPathAsUint64(any *Any, keys ...interface{}) (uint64, error) {
-	ret, err := getPath(any.val, keys...)
-	any.LastAccessed = ret
-	if err != nil {
-		any.Error = err
-		return 0, err
-	}
-	switch ret := ret.(type) {
-	case uint8:
-		return uint64(ret), nil;
-	case int8:
-		return uint64(ret), nil;
-	case uint16:
-		return uint64(ret), nil;
-	case int16:
-		return uint64(ret), nil;
-	case uint32:
-		return uint64(ret), nil;
-	case int32:
-		return uint64(ret), nil;
-	case uint64:
-		return uint64(ret), nil;
-	case int64:
-		return uint64(ret), nil;
-	case int:
-		return uint64(ret), nil;
-	case uint:
-		return uint64(ret), nil;
-	case float32:
-		return uint64(ret), nil;
-	case float64:
-		return uint64(ret), nil;
-	case string:
-		intVal, err := strconv.ParseUint(ret, 10, 64)
-		if err != nil {
-			return 0, err
-		}
-		return intVal, nil;
-	default:
-		return 0, fmt.Errorf("%v is not number", ret)
-	}
-}
-
-func getPathAsFloat64(any *Any, keys ...interface{}) (float64, error) {
-	ret, err := getPath(any.val, keys...)
-	any.LastAccessed = ret
-	if err != nil {
-		any.Error = err
-		return 0, err
-	}
-	switch ret := ret.(type) {
-	case uint8:
-		return float64(ret), nil;
-	case int8:
-		return float64(ret), nil;
-	case uint16:
-		return float64(ret), nil;
-	case int16:
-		return float64(ret), nil;
-	case uint32:
-		return float64(ret), nil;
-	case int32:
-		return float64(ret), nil;
-	case uint64:
-		return float64(ret), nil;
-	case int64:
-		return float64(ret), nil;
-	case int:
-		return float64(ret), nil;
-	case uint:
-		return float64(ret), nil;
-	case float32:
-		return float64(ret), nil;
-	case float64:
-		return float64(ret), nil;
-	case string:
-		floatVal, err := strconv.ParseFloat(ret, 64)
-		if err != nil {
-			return 0, err
-		}
-		return floatVal, nil;
-	default:
-		return 0, fmt.Errorf("%v is not number", ret)
-	}
-}
-
-func getPath(val interface{}, keys ...interface{}) (interface{}, error) {
-	if (len(keys) == 0) {
-		return val, nil;
-	}
-	switch key := keys[0].(type) {
-	case string:
-		nextVal, err := getFromMap(val, key)
-		if err != nil {
-			return nil, err
-		}
-		nextKeys := make([]interface{}, len(keys) - 1)
-		copy(nextKeys, keys[1:])
-		return getPath(nextVal, nextKeys...)
-	case int:
-		nextVal, err := getFromArray(val, key)
-		if err != nil {
-			return nil, err
-		}
-		nextKeys := make([]interface{}, len(keys) - 1)
-		copy(nextKeys, keys[1:])
-		return getPath(nextVal, nextKeys...)
-	default:
-		return nil, fmt.Errorf("%v is not string or int", keys[0]);
-	}
-	return getPath(val, keys);
-}
-
-func getFromMap(val interface{}, key string) (interface{}, error) {
-	mapVal, ok := val.(map[string]interface{})
-	if !ok {
-		return nil, fmt.Errorf("%v is not map[string]interface{}", val)
-	}
-	ret, found := mapVal[key]
-	if !found {
-		return nil, fmt.Errorf("%v not found in %v", key, mapVal)
-	}
-	return ret, nil
-}
-
-func getFromArray(val interface{}, key int) (interface{}, error) {
-	arrayVal, ok := val.([]interface{})
-	if !ok {
-		return nil, fmt.Errorf("%v is not []interface{}", val)
-	}
-	if key >= len(arrayVal) {
-		return nil, fmt.Errorf("%v exceed %v", key, arrayVal)
-	}
-	if key < 0 {
-		return nil, fmt.Errorf("%v exceed %v", key, arrayVal)
-	}
-	return arrayVal[key], nil
-}

any_test.go

@@ -1,72 +0,0 @@
-package jsoniter
-
-import (
-	"testing"
-	"fmt"
-)
-
-func Test_get_from_map(t *testing.T) {
-	any := Any{val: map[string]interface{}{
-		"hello": "world",
-	}}
-	if any.ToString("hello") != "world" {
-		t.FailNow()
-	}
-}
-
-func Test_get_from_array(t *testing.T) {
-	any := Any{val: []interface{}{
-		"hello", "world",
-	}}
-	if any.ToString(1) != "world" {
-		t.FailNow()
-	}
-}
-
-func Test_get_int(t *testing.T) {
-	any := Any{val: []interface{}{
-		1, 2, 3,
-	}}
-	if any.ToInt(1) != 2 {
-		t.FailNow()
-	}
-}
-
-func Test_is_null(t *testing.T) {
-	any := Any{val: []interface{}{
-		1, 2, 3,
-	}}
-	if any.IsNull() != false {
-		t.FailNow()
-	}
-}
-
-func Test_get_bool(t *testing.T) {
-	any := Any{val: []interface{}{
-		true, true, false,
-	}}
-	if any.ToBool(1) != true {
-		t.FailNow()
-	}
-}
-
-func Test_nested_read(t *testing.T) {
-	any := Any{val: []interface{}{
-		true, map[string]interface{}{
-			"hello": "world",
-		}, false,
-	}}
-	if any.ToString(1, "hello") != "world" {
-		fmt.Println(any.Error)
-		t.FailNow()
-	}
-}
-
-func Test_int_to_string(t *testing.T) {
-	any := Any{val: []interface{}{
-		true, 5, false,
-	}}
-	if any.ToString(1) != "5" {
-		t.FailNow()
-	}
-}

example_test.go

@@ -0,0 +1,47 @@
+package jsoniter_test
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/json-iterator/go"
+)
+
+func ExampleMarshal() {
+	type ColorGroup struct {
+		ID     int
+		Name   string
+		Colors []string
+	}
+	group := ColorGroup{
+		ID:     1,
+		Name:   "Reds",
+		Colors: []string{"Crimson", "Red", "Ruby", "Maroon"},
+	}
+	b, err := jsoniter.Marshal(group)
+	if err != nil {
+		fmt.Println("error:", err)
+	}
+	os.Stdout.Write(b)
+	// Output:
+	// {"ID":1,"Name":"Reds","Colors":["Crimson","Red","Ruby","Maroon"]}
+}
+
+func ExampleUnmarshal() {
+	var jsonBlob = []byte(`[
+		{"Name": "Platypus", "Order": "Monotremata"},
+		{"Name": "Quoll",    "Order": "Dasyuromorphia"}
+	]`)
+	type Animal struct {
+		Name  string
+		Order string
+	}
+	var animals []Animal
+	err := jsoniter.Unmarshal(jsonBlob, &animals)
+	if err != nil {
+		fmt.Println("error:", err)
+	}
+	fmt.Printf("%+v", animals)
+	// Output:
+	// [{Name:Platypus Order:Monotremata} {Name:Quoll Order:Dasyuromorphia}]
+}

feature_adapter.go

@@ -0,0 +1,129 @@
+// Package jsoniter implements encoding and decoding of JSON as defined in
+// RFC 4627 and provides interfaces with identical syntax of standard lib encoding/json.
+// Converting from encoding/json to jsoniter is no more than replacing the package with jsoniter
+// and variable type declarations (if any).
+// jsoniter interfaces gives 100% compatibility with code using standard lib.
+//
+// "JSON and Go"
+// (https://golang.org/doc/articles/json_and_go.html)
+// gives a description of how Marshal/Unmarshal operate
+// between arbitrary or predefined json objects and bytes,
+// and it applies to jsoniter.Marshal/Unmarshal as well.
+package jsoniter
+
+import (
+	"bytes"
+	"encoding/json"
+	"io"
+	"unsafe"
+)
+
+// Unmarshal adapts to json/encoding Unmarshal API
+//
+// Unmarshal parses the JSON-encoded data and stores the result in the value pointed to by v.
+// Refer to https://godoc.org/encoding/json#Unmarshal for more information
+func Unmarshal(data []byte, v interface{}) error {
+	return ConfigOfDefault.Unmarshal(data, v)
+}
+
+// UnmarshalAny adapts to
+func UnmarshalAny(data []byte) (Any, error) {
+	return ConfigOfDefault.UnmarshalAny(data)
+}
+
+func lastNotSpacePos(data []byte) int {
+	for i := len(data) - 1; i >= 0; i-- {
+		if data[i] != ' ' && data[i] != '\t' && data[i] != '\r' && data[i] != '\n' {
+			return i + 1
+		}
+	}
+	return 0
+}
+
+func UnmarshalFromString(str string, v interface{}) error {
+	return ConfigOfDefault.UnmarshalFromString(str, v)
+}
+
+func UnmarshalAnyFromString(str string) (Any, error) {
+	return ConfigOfDefault.UnmarshalAnyFromString(str)
+}
+
+// Marshal adapts to json/encoding Marshal API
+//
+// Marshal returns the JSON encoding of v, adapts to json/encoding Marshal API
+// Refer to https://godoc.org/encoding/json#Marshal for more information
+func Marshal(v interface{}) ([]byte, error) {
+	return ConfigOfDefault.Marshal(v)
+}
+
+func MarshalToString(v interface{}) (string, error) {
+	return ConfigOfDefault.MarshalToString(v)
+}
+
+// NewDecoder adapts to json/stream NewDecoder API.
+//
+// NewDecoder returns a new decoder that reads from r.
+//
+// Instead of a json/encoding Decoder, an AdaptedDecoder is returned
+// Refer to https://godoc.org/encoding/json#NewDecoder for more information
+func NewDecoder(reader io.Reader) *AdaptedDecoder {
+	return ConfigOfDefault.NewDecoder(reader)
+}
+
+// AdaptedDecoder reads and decodes JSON values from an input stream.
+// AdaptedDecoder provides identical APIs with json/stream Decoder (Token() and UseNumber() are in progress)
+type AdaptedDecoder struct {
+	iter *Iterator
+}
+
+func (adapter *AdaptedDecoder) Decode(obj interface{}) error {
+	adapter.iter.ReadVal(obj)
+	err := adapter.iter.Error
+	if err == io.EOF {
+		return nil
+	}
+	return adapter.iter.Error
+}
+
+func (adapter *AdaptedDecoder) More() bool {
+	return adapter.iter.head != adapter.iter.tail
+}
+
+func (adapter *AdaptedDecoder) Buffered() io.Reader {
+	remaining := adapter.iter.buf[adapter.iter.head:adapter.iter.tail]
+	return bytes.NewReader(remaining)
+}
+
+func (decoder *AdaptedDecoder) UseNumber() {
+	RegisterTypeDecoder("interface {}", func(ptr unsafe.Pointer, iter *Iterator) {
+		if iter.WhatIsNext() == Number {
+			*((*interface{})(ptr)) = json.Number(iter.readNumberAsString())
+		} else {
+			*((*interface{})(ptr)) = iter.Read()
+		}
+	})
+}
+
+func NewEncoder(writer io.Writer) *AdaptedEncoder {
+	return ConfigOfDefault.NewEncoder(writer)
+}
+
+type AdaptedEncoder struct {
+	stream *Stream
+}
+
+func (adapter *AdaptedEncoder) Encode(val interface{}) error {
+	adapter.stream.WriteVal(val)
+	adapter.stream.Flush()
+	return adapter.stream.Error
+}
+
+func (adapter *AdaptedEncoder) SetIndent(prefix, indent string) {
+	adapter.stream.cfg.indentionStep = len(indent)
+}
+
+func (adapter *AdaptedEncoder) SetEscapeHTML(escapeHtml bool) {
+	config := adapter.stream.cfg.configBeforeFrozen
+	config.EscapeHtml = escapeHtml
+	adapter.stream.cfg = config.Froze()
+}

feature_any.go

@@ -0,0 +1,304 @@
+package jsoniter
+
+import (
+	"fmt"
+	"reflect"
+)
+
+type Any interface {
+	LastError() error
+	ValueType() ValueType
+	ToBool() bool
+	ToInt() int
+	ToInt32() int32
+	ToInt64() int64
+	ToUint() uint
+	ToUint32() uint32
+	ToUint64() uint64
+	ToFloat32() float32
+	ToFloat64() float64
+	ToString() string
+	Get(path ...interface{}) Any
+	Size() int
+	Keys() []string
+	IterateObject() (func() (string, Any, bool), bool)
+	IterateArray() (func() (Any, bool), bool)
+	GetArray() []Any
+	SetArray(newList []Any) bool
+	GetObject() map[string]Any
+	SetObject(map[string]Any) bool
+	GetInterface() interface{}
+	WriteTo(stream *Stream)
+	Parse() *Iterator
+}
+
+type baseAny struct{}
+
+func (any *baseAny) Get(path ...interface{}) Any {
+	return &invalidAny{baseAny{}, fmt.Errorf("Get %v from simple value", path)}
+}
+
+func (any *baseAny) Size() int {
+	return 0
+}
+
+func (any *baseAny) Keys() []string {
+	return []string{}
+}
+
+func (any *baseAny) IterateObject() (func() (string, Any, bool), bool) {
+	return nil, false
+}
+
+func (any *baseAny) IterateArray() (func() (Any, bool), bool) {
+	return nil, false
+}
+
+func (any *baseAny) GetArray() []Any {
+	return []Any{}
+}
+
+func (any *baseAny) SetArray(newList []Any) bool {
+	return false
+}
+
+func (any *baseAny) GetObject() map[string]Any {
+	return map[string]Any{}
+}
+
+func (any *baseAny) SetObject(map[string]Any) bool {
+	return false
+}
+
+func WrapInt32(val int32) Any {
+	return &int32Any{baseAny{}, val}
+}
+
+func WrapInt64(val int64) Any {
+	return &int64Any{baseAny{}, val}
+}
+
+func WrapUint32(val uint32) Any {
+	return &uint32Any{baseAny{}, val}
+}
+
+func WrapUint64(val uint64) Any {
+	return &uint64Any{baseAny{}, val}
+}
+
+func WrapFloat64(val float64) Any {
+	return &floatAny{baseAny{}, val}
+}
+
+func WrapString(val string) Any {
+	return &stringAny{baseAny{}, nil, val}
+}
+
+func Wrap(val interface{}) Any {
+	if val == nil {
+		return &nilAny{}
+	}
+	asAny, isAny := val.(Any)
+	if isAny {
+		return asAny
+	}
+	type_ := reflect.TypeOf(val)
+	switch type_.Kind() {
+	case reflect.Slice:
+		return wrapArray(val)
+	case reflect.Struct:
+		return wrapStruct(val)
+	case reflect.Map:
+		return wrapMap(val)
+	case reflect.String:
+		return WrapString(val.(string))
+	case reflect.Int:
+		return WrapInt64(int64(val.(int)))
+	case reflect.Int8:
+		return WrapInt32(int32(val.(int8)))
+	case reflect.Int16:
+		return WrapInt32(int32(val.(int16)))
+	case reflect.Int32:
+		return WrapInt32(val.(int32))
+	case reflect.Int64:
+		return WrapInt64(val.(int64))
+	case reflect.Uint:
+		return WrapUint64(uint64(val.(uint)))
+	case reflect.Uint8:
+		return WrapUint32(uint32(val.(uint8)))
+	case reflect.Uint16:
+		return WrapUint32(uint32(val.(uint16)))
+	case reflect.Uint32:
+		return WrapUint32(uint32(val.(uint32)))
+	case reflect.Uint64:
+		return WrapUint64(val.(uint64))
+	case reflect.Float32:
+		return WrapFloat64(float64(val.(float32)))
+	case reflect.Float64:
+		return WrapFloat64(val.(float64))
+	case reflect.Bool:
+		if val.(bool) == true {
+			return &trueAny{}
+		} else {
+			return &falseAny{}
+		}
+	}
+	return &invalidAny{baseAny{}, fmt.Errorf("unsupported type: %v", type_)}
+}
+
+func (iter *Iterator) ReadAny() Any {
+	return iter.readAny(nil)
+}
+
+func (iter *Iterator) readAny(reusableIter *Iterator) Any {
+	c := iter.nextToken()
+	switch c {
+	case '"':
+		return iter.readStringAny(reusableIter)
+	case 'n':
+		iter.skipFixedBytes(3) // null
+		return &nilAny{}
+	case 't':
+		iter.skipFixedBytes(3) // true
+		return &trueAny{}
+	case 'f':
+		iter.skipFixedBytes(4) // false
+		return &falseAny{}
+	case '{':
+		return iter.readObjectAny(reusableIter)
+	case '[':
+		return iter.readArrayAny(reusableIter)
+	default:
+		return iter.readNumberAny(reusableIter, c)
+	}
+}
+
+func (iter *Iterator) readNumberAny(reusableIter *Iterator, firstByte byte) Any {
+	dotFound := false
+	lazyBuf := make([]byte, 1, 8)
+	lazyBuf[0] = firstByte
+	for {
+		for i := iter.head; i < iter.tail; i++ {
+			c := iter.buf[i]
+			if c == '.' {
+				dotFound = true
+				continue
+			}
+			switch c {
+			case ' ', '\n', '\r', '\t', ',', '}', ']':
+				lazyBuf = append(lazyBuf, iter.buf[iter.head:i]...)
+				iter.head = i
+				if dotFound {
+					return &float64LazyAny{baseAny{}, lazyBuf, reusableIter, nil, 0}
+				} else {
+					if firstByte == '-' {
+						return &int64LazyAny{baseAny{}, lazyBuf, reusableIter, nil, 0}
+					} else {
+						return &uint64LazyAny{baseAny{}, lazyBuf, reusableIter, nil, 0}
+					}
+				}
+			}
+		}
+		lazyBuf = append(lazyBuf, iter.buf[iter.head:iter.tail]...)
+		if !iter.loadMore() {
+			iter.head = iter.tail
+			if dotFound {
+				return &float64LazyAny{baseAny{}, lazyBuf, reusableIter, nil, 0}
+			} else {
+				if firstByte == '-' {
+					return &int64LazyAny{baseAny{}, lazyBuf, reusableIter, nil, 0}
+				} else {
+					return &uint64LazyAny{baseAny{}, lazyBuf, reusableIter, nil, 0}
+				}
+			}
+		}
+	}
+}
+
+func (iter *Iterator) readStringAny(reusableIter *Iterator) Any {
+	lazyBuf := make([]byte, 1, 8)
+	lazyBuf[0] = '"'
+	for {
+		end, escaped := iter.findStringEnd()
+		if end == -1 {
+			lazyBuf = append(lazyBuf, iter.buf[iter.head:iter.tail]...)
+			if !iter.loadMore() {
+				iter.reportError("readStringAny", "incomplete string")
+				return &invalidAny{}
+			}
+			if escaped {
+				iter.head = 1 // skip the first char as last char read is \
+			}
+		} else {
+			lazyBuf = append(lazyBuf, iter.buf[iter.head:end]...)
+			iter.head = end
+			return &stringLazyAny{baseAny{}, lazyBuf, reusableIter, nil, ""}
+		}
+	}
+}
+
+func (iter *Iterator) readObjectAny(reusableIter *Iterator) Any {
+	level := 1
+	lazyBuf := make([]byte, 1, 32)
+	lazyBuf[0] = '{'
+	for {
+		start := iter.head
+		for i := iter.head; i < iter.tail; i++ {
+			switch iter.buf[i] {
+			case '"': // If inside string, skip it
+				iter.head = i + 1
+				iter.skipString()
+				i = iter.head - 1 // it will be i++ soon
+			case '{': // If open symbol, increase level
+				level++
+			case '}': // If close symbol, increase level
+				level--
+
+				// If we have returned to the original level, we're done
+				if level == 0 {
+					iter.head = i + 1
+					lazyBuf = append(lazyBuf, iter.buf[start:iter.head]...)
+					return &objectLazyAny{baseAny{}, lazyBuf, reusableIter, nil, nil, lazyBuf}
+				}
+			}
+		}
+		lazyBuf = append(lazyBuf, iter.buf[iter.head:iter.tail]...)
+		if !iter.loadMore() {
+			iter.reportError("skipObject", "incomplete object")
+			return &invalidAny{}
+		}
+	}
+}
+
+func (iter *Iterator) readArrayAny(reusableIter *Iterator) Any {
+	level := 1
+	lazyBuf := make([]byte, 1, 32)
+	lazyBuf[0] = '['
+	for {
+		start := iter.head
+		for i := iter.head; i < iter.tail; i++ {
+			switch iter.buf[i] {
+			case '"': // If inside string, skip it
+				iter.head = i + 1
+				iter.skipString()
+				i = iter.head - 1 // it will be i++ soon
+			case '[': // If open symbol, increase level
+				level++
+			case ']': // If close symbol, increase level
+				level--
+
+				// If we have returned to the original level, we're done
+				if level == 0 {
+					iter.head = i + 1
+					lazyBuf = append(lazyBuf, iter.buf[start:iter.head]...)
+					return &arrayLazyAny{baseAny{}, lazyBuf, reusableIter, nil, nil, lazyBuf}
+				}
+			}
+		}
+		lazyBuf = append(lazyBuf, iter.buf[iter.head:iter.tail]...)
+		if !iter.loadMore() {
+			iter.reportError("skipArray", "incomplete array")
+			return &invalidAny{}
+		}
+	}
+}

feature_any_array.go

@@ -0,0 +1,539 @@
+package jsoniter
+
+import (
+	"fmt"
+	"reflect"
+	"unsafe"
+)
+
+type arrayLazyAny struct {
+	baseAny
+	buf       []byte
+	iter      *Iterator
+	err       error
+	cache     []Any
+	remaining []byte
+}
+
+func (any *arrayLazyAny) ValueType() ValueType {
+	return Array
+}
+
+func (any *arrayLazyAny) Parse() *Iterator {
+	iter := any.iter
+	if iter == nil {
+		iter = NewIterator(ConfigOfDefault)
+		any.iter = iter
+	}
+	iter.ResetBytes(any.remaining)
+	return iter
+}
+
+func (any *arrayLazyAny) fillCacheUntil(target int) Any {
+	if any.remaining == nil {
+		if target >= len(any.cache) {
+			return nil
+		}
+		return any.cache[target]
+	}
+	if any.cache == nil {
+		any.cache = make([]Any, 0, 8)
+	}
+	i := len(any.cache)
+	if target < i {
+		return any.cache[target]
+	}
+	iter := any.Parse()
+	if len(any.remaining) == len(any.buf) {
+		iter.head++
+		c := iter.nextToken()
+		if c != ']' {
+			iter.unreadByte()
+			element := iter.readAny(iter)
+			any.cache = append(any.cache, element)
+			if target == 0 {
+				any.remaining = iter.buf[iter.head:]
+				any.err = iter.Error
+				return element
+			}
+			i = 1
+		} else {
+			any.remaining = nil
+			any.err = iter.Error
+			return nil
+		}
+	}
+	for iter.nextToken() == ',' {
+		element := iter.readAny(iter)
+		any.cache = append(any.cache, element)
+		if i == target {
+			any.remaining = iter.buf[iter.head:]
+			any.err = iter.Error
+			return element
+		}
+		i++
+	}
+	any.remaining = nil
+	any.err = iter.Error
+	return nil
+}
+
+func (any *arrayLazyAny) fillCache() {
+	if any.remaining == nil {
+		return
+	}
+	if any.cache == nil {
+		any.cache = make([]Any, 0, 8)
+	}
+	iter := any.Parse()
+	if len(any.remaining) == len(any.buf) {
+		iter.head++
+		c := iter.nextToken()
+		if c != ']' {
+			iter.unreadByte()
+			any.cache = append(any.cache, iter.readAny(iter))
+		} else {
+			any.remaining = nil
+			any.err = iter.Error
+			return
+		}
+	}
+	for iter.nextToken() == ',' {
+		any.cache = append(any.cache, iter.readAny(iter))
+	}
+	any.remaining = nil
+	any.err = iter.Error
+}
+
+func (any *arrayLazyAny) LastError() error {
+	return any.err
+}
+
+func (any *arrayLazyAny) ToBool() bool {
+	if any.cache == nil {
+		any.IterateArray() // trigger first element read
+	}
+	return len(any.cache) != 0
+}
+
+func (any *arrayLazyAny) ToInt() int {
+	if any.cache == nil {
+		any.IterateArray() // trigger first element read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayLazyAny) ToInt32() int32 {
+	if any.cache == nil {
+		any.IterateArray() // trigger first element read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayLazyAny) ToInt64() int64 {
+	if any.cache == nil {
+		any.IterateArray() // trigger first element read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayLazyAny) ToUint() uint {
+	if any.cache == nil {
+		any.IterateArray() // trigger first element read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayLazyAny) ToUint32() uint32 {
+	if any.cache == nil {
+		any.IterateArray() // trigger first element read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayLazyAny) ToUint64() uint64 {
+	if any.cache == nil {
+		any.IterateArray() // trigger first element read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayLazyAny) ToFloat32() float32 {
+	if any.cache == nil {
+		any.IterateArray() // trigger first element read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayLazyAny) ToFloat64() float64 {
+	if any.cache == nil {
+		any.IterateArray() // trigger first element read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayLazyAny) ToString() string {
+	if len(any.remaining) == len(any.buf) {
+		// nothing has been parsed yet
+		return *(*string)(unsafe.Pointer(&any.buf))
+	} else {
+		any.fillCache()
+		str, err := MarshalToString(any.cache)
+		any.err = err
+		return str
+	}
+}
+
+func (any *arrayLazyAny) Get(path ...interface{}) Any {
+	if len(path) == 0 {
+		return any
+	}
+	var element Any
+	switch firstPath := path[0].(type) {
+	case int:
+		element = any.fillCacheUntil(firstPath)
+		if element == nil {
+			element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", firstPath, any.cache)}
+		}
+	case int32:
+		if '*' == firstPath {
+			any.fillCache()
+			arr := make([]Any, 0, len(any.cache))
+			for _, element := range any.cache {
+				found := element.Get(path[1:]...)
+				if found.ValueType() != Invalid {
+					arr = append(arr, found)
+				}
+			}
+			return wrapArray(arr)
+		} else {
+			element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", path[0], any.cache)}
+		}
+	default:
+		element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", path[0], any.cache)}
+	}
+	if len(path) == 1 {
+		return element
+	} else {
+		return element.Get(path[1:]...)
+	}
+}
+
+func (any *arrayLazyAny) Size() int {
+	any.fillCache()
+	return len(any.cache)
+}
+
+func (any *arrayLazyAny) IterateArray() (func() (Any, bool), bool) {
+	if any.cache == nil {
+		any.cache = make([]Any, 0, 8)
+	}
+	remaining := any.remaining
+	if len(remaining) == len(any.buf) {
+		iter := any.Parse()
+		iter.head++
+		c := iter.nextToken()
+		if c != ']' {
+			iter.unreadByte()
+			v := iter.readAny(iter)
+			any.cache = append(any.cache, v)
+			remaining = iter.buf[iter.head:]
+			any.remaining = remaining
+		} else {
+			remaining = nil
+			any.remaining = nil
+			any.err = iter.Error
+			return nil, false
+		}
+	}
+	if len(any.cache) == 0 {
+		return nil, false
+	}
+	arr := any.cache
+	nextValue := arr[0]
+	i := 1
+	return func() (Any, bool) {
+		value := nextValue
+		if i < len(arr) {
+			// read from cache
+			nextValue = arr[i]
+			i++
+			return value, true
+		} else {
+			// read from buffer
+			iter := any.iter
+			if iter == nil {
+				iter = NewIterator(ConfigOfDefault)
+				any.iter = iter
+			}
+			iter.ResetBytes(remaining)
+			c := iter.nextToken()
+			if c == ',' {
+				nextValue = iter.readAny(iter)
+				any.cache = append(any.cache, nextValue)
+				remaining = iter.buf[iter.head:]
+				any.remaining = remaining
+				any.err = iter.Error
+				return value, true
+			} else {
+				remaining = nil
+				any.remaining = nil
+				any.err = iter.Error
+				return value, false
+			}
+		}
+	}, true
+}
+
+func (any *arrayLazyAny) GetArray() []Any {
+	any.fillCache()
+	return any.cache
+}
+
+func (any *arrayLazyAny) SetArray(newList []Any) bool {
+	any.fillCache()
+	any.cache = newList
+	return true
+}
+
+func (any *arrayLazyAny) WriteTo(stream *Stream) {
+	if len(any.remaining) == len(any.buf) {
+		// nothing has been parsed yet
+		stream.Write(any.buf)
+	} else {
+		any.fillCache()
+		stream.WriteVal(any.cache)
+	}
+}
+
+func (any *arrayLazyAny) GetInterface() interface{} {
+	any.fillCache()
+	return any.cache
+}
+
+type arrayAny struct {
+	baseAny
+	err   error
+	cache []Any
+	val   reflect.Value
+}
+
+func wrapArray(val interface{}) *arrayAny {
+	return &arrayAny{baseAny{}, nil, nil, reflect.ValueOf(val)}
+}
+
+func (any *arrayAny) ValueType() ValueType {
+	return Array
+}
+
+func (any *arrayAny) Parse() *Iterator {
+	return nil
+}
+
+func (any *arrayAny) LastError() error {
+	return any.err
+}
+
+func (any *arrayAny) ToBool() bool {
+	return any.val.Len() != 0
+}
+
+func (any *arrayAny) ToInt() int {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayAny) ToInt32() int32 {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayAny) ToInt64() int64 {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayAny) ToUint() uint {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayAny) ToUint32() uint32 {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayAny) ToUint64() uint64 {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayAny) ToFloat32() float32 {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayAny) ToFloat64() float64 {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *arrayAny) ToString() string {
+	if len(any.cache) == 0 {
+		// nothing has been parsed yet
+		str, err := MarshalToString(any.val.Interface())
+		any.err = err
+		return str
+	} else {
+		any.fillCache()
+		str, err := MarshalToString(any.cache)
+		any.err = err
+		return str
+	}
+}
+
+func (any *arrayAny) fillCacheUntil(idx int) Any {
+	if idx < len(any.cache) {
+		return any.cache[idx]
+	} else {
+		for i := len(any.cache); i < any.val.Len(); i++ {
+			element := Wrap(any.val.Index(i).Interface())
+			any.cache = append(any.cache, element)
+			if idx == i {
+				return element
+			}
+		}
+		return nil
+	}
+}
+
+func (any *arrayAny) fillCache() {
+	any.cache = make([]Any, any.val.Len())
+	for i := 0; i < any.val.Len(); i++ {
+		any.cache[i] = Wrap(any.val.Index(i).Interface())
+	}
+}
+
+func (any *arrayAny) Get(path ...interface{}) Any {
+	if len(path) == 0 {
+		return any
+	}
+	var element Any
+	switch firstPath := path[0].(type) {
+	case int:
+		element = any.fillCacheUntil(firstPath)
+		if element == nil {
+			element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", firstPath, any.cache)}
+		}
+	case int32:
+		if '*' == firstPath {
+			any.fillCache()
+			mappedAll := make([]Any, 0, len(any.cache))
+			for _, element := range any.cache {
+				mapped := element.Get(path[1:]...)
+				if mapped.ValueType() != Invalid {
+					mappedAll = append(mappedAll, mapped)
+				}
+			}
+			return wrapArray(mappedAll)
+		} else {
+			element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", path[0], any.cache)}
+		}
+	default:
+		element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", path[0], any.cache)}
+	}
+	if len(path) == 1 {
+		return element
+	} else {
+		return element.Get(path[1:]...)
+	}
+}
+
+func (any *arrayAny) Size() int {
+	any.fillCache()
+	return len(any.cache)
+}
+
+func (any *arrayAny) IterateArray() (func() (Any, bool), bool) {
+	if any.val.Len() == 0 {
+		return nil, false
+	}
+	i := 0
+	return func() (Any, bool) {
+		if i == any.val.Len() {
+			return nil, false
+		}
+		if i == len(any.cache) {
+			any.cache = append(any.cache, Wrap(any.val.Index(i).Interface()))
+		}
+		val := any.cache[i]
+		i++
+		return val, i != any.val.Len()
+	}, true
+}
+
+func (any *arrayAny) GetArray() []Any {
+	any.fillCache()
+	return any.cache
+}
+
+func (any *arrayAny) SetArray(newList []Any) bool {
+	any.fillCache()
+	any.cache = newList
+	return true
+}
+
+func (any *arrayAny) WriteTo(stream *Stream) {
+	if len(any.cache) == 0 {
+		// nothing has been parsed yet
+		stream.WriteVal(any.val)
+	} else {
+		any.fillCache()
+		stream.WriteVal(any.cache)
+	}
+}
+
+func (any *arrayAny) GetInterface() interface{} {
+	any.fillCache()
+	return any.cache
+}

feature_any_bool.go

@@ -0,0 +1,129 @@
+package jsoniter
+
+type trueAny struct {
+	baseAny
+}
+
+func (any *trueAny) LastError() error {
+	return nil
+}
+
+func (any *trueAny) ToBool() bool {
+	return true
+}
+
+func (any *trueAny) ToInt() int {
+	return 1
+}
+
+func (any *trueAny) ToInt32() int32 {
+	return 1
+}
+
+func (any *trueAny) ToInt64() int64 {
+	return 1
+}
+
+func (any *trueAny) ToUint() uint {
+	return 1
+}
+
+func (any *trueAny) ToUint32() uint32 {
+	return 1
+}
+
+func (any *trueAny) ToUint64() uint64 {
+	return 1
+}
+
+func (any *trueAny) ToFloat32() float32 {
+	return 1
+}
+
+func (any *trueAny) ToFloat64() float64 {
+	return 1
+}
+
+func (any *trueAny) ToString() string {
+	return "true"
+}
+
+func (any *trueAny) WriteTo(stream *Stream) {
+	stream.WriteTrue()
+}
+
+func (any *trueAny) Parse() *Iterator {
+	return nil
+}
+
+func (any *trueAny) GetInterface() interface{} {
+	return true
+}
+
+func (any *trueAny) ValueType() ValueType {
+	return Bool
+}
+
+type falseAny struct {
+	baseAny
+}
+
+func (any *falseAny) LastError() error {
+	return nil
+}
+
+func (any *falseAny) ToBool() bool {
+	return false
+}
+
+func (any *falseAny) ToInt() int {
+	return 0
+}
+
+func (any *falseAny) ToInt32() int32 {
+	return 0
+}
+
+func (any *falseAny) ToInt64() int64 {
+	return 0
+}
+
+func (any *falseAny) ToUint() uint {
+	return 0
+}
+
+func (any *falseAny) ToUint32() uint32 {
+	return 0
+}
+
+func (any *falseAny) ToUint64() uint64 {
+	return 0
+}
+
+func (any *falseAny) ToFloat32() float32 {
+	return 0
+}
+
+func (any *falseAny) ToFloat64() float64 {
+	return 0
+}
+
+func (any *falseAny) ToString() string {
+	return "false"
+}
+
+func (any *falseAny) WriteTo(stream *Stream) {
+	stream.WriteFalse()
+}
+
+func (any *falseAny) Parse() *Iterator {
+	return nil
+}
+
+func (any *falseAny) GetInterface() interface{} {
+	return false
+}
+
+func (any *falseAny) ValueType() ValueType {
+	return Bool
+}

feature_any_float.go

@@ -0,0 +1,166 @@
+package jsoniter
+
+import (
+	"io"
+	"strconv"
+	"unsafe"
+)
+
+type float64LazyAny struct {
+	baseAny
+	buf   []byte
+	iter  *Iterator
+	err   error
+	cache float64
+}
+
+func (any *float64LazyAny) Parse() *Iterator {
+	iter := any.iter
+	if iter == nil {
+		iter = NewIterator(ConfigOfDefault)
+	}
+	iter.ResetBytes(any.buf)
+	return iter
+}
+
+func (any *float64LazyAny) ValueType() ValueType {
+	return Number
+}
+
+func (any *float64LazyAny) fillCache() {
+	if any.err != nil {
+		return
+	}
+	iter := any.Parse()
+	any.cache = iter.ReadFloat64()
+	if iter.Error != io.EOF {
+		iter.reportError("floatLazyAny", "there are bytes left")
+	}
+	any.err = iter.Error
+}
+
+func (any *float64LazyAny) LastError() error {
+	return any.err
+}
+
+func (any *float64LazyAny) ToBool() bool {
+	return any.ToFloat64() != 0
+}
+
+func (any *float64LazyAny) ToInt() int {
+	any.fillCache()
+	return int(any.cache)
+}
+
+func (any *float64LazyAny) ToInt32() int32 {
+	any.fillCache()
+	return int32(any.cache)
+}
+
+func (any *float64LazyAny) ToInt64() int64 {
+	any.fillCache()
+	return int64(any.cache)
+}
+
+func (any *float64LazyAny) ToUint() uint {
+	any.fillCache()
+	return uint(any.cache)
+}
+
+func (any *float64LazyAny) ToUint32() uint32 {
+	any.fillCache()
+	return uint32(any.cache)
+}
+
+func (any *float64LazyAny) ToUint64() uint64 {
+	any.fillCache()
+	return uint64(any.cache)
+}
+
+func (any *float64LazyAny) ToFloat32() float32 {
+	any.fillCache()
+	return float32(any.cache)
+}
+
+func (any *float64LazyAny) ToFloat64() float64 {
+	any.fillCache()
+	return any.cache
+}
+
+func (any *float64LazyAny) ToString() string {
+	return *(*string)(unsafe.Pointer(&any.buf))
+}
+
+func (any *float64LazyAny) WriteTo(stream *Stream) {
+	stream.Write(any.buf)
+}
+
+func (any *float64LazyAny) GetInterface() interface{} {
+	any.fillCache()
+	return any.cache
+}
+
+type floatAny struct {
+	baseAny
+	val float64
+}
+
+func (any *floatAny) Parse() *Iterator {
+	return nil
+}
+
+func (any *floatAny) ValueType() ValueType {
+	return Number
+}
+
+func (any *floatAny) LastError() error {
+	return nil
+}
+
+func (any *floatAny) ToBool() bool {
+	return any.ToFloat64() != 0
+}
+
+func (any *floatAny) ToInt() int {
+	return int(any.val)
+}
+
+func (any *floatAny) ToInt32() int32 {
+	return int32(any.val)
+}
+
+func (any *floatAny) ToInt64() int64 {
+	return int64(any.val)
+}
+
+func (any *floatAny) ToUint() uint {
+	return uint(any.val)
+}
+
+func (any *floatAny) ToUint32() uint32 {
+	return uint32(any.val)
+}
+
+func (any *floatAny) ToUint64() uint64 {
+	return uint64(any.val)
+}
+
+func (any *floatAny) ToFloat32() float32 {
+	return float32(any.val)
+}
+
+func (any *floatAny) ToFloat64() float64 {
+	return any.val
+}
+
+func (any *floatAny) ToString() string {
+	return strconv.FormatFloat(any.val, 'E', -1, 64)
+}
+
+func (any *floatAny) WriteTo(stream *Stream) {
+	stream.WriteFloat64(any.val)
+}
+
+func (any *floatAny) GetInterface() interface{} {
+	return any.val
+}

feature_any_int32.go

@@ -0,0 +1,70 @@
+package jsoniter
+
+import (
+	"strconv"
+)
+
+type int32Any struct {
+	baseAny
+	val int32
+}
+
+func (any *int32Any) LastError() error {
+	return nil
+}
+
+func (any *int32Any) ValueType() ValueType {
+	return Number
+}
+
+func (any *int32Any) ToBool() bool {
+	return any.val != 0
+}
+
+func (any *int32Any) ToInt() int {
+	return int(any.val)
+}
+
+func (any *int32Any) ToInt32() int32 {
+	return any.val
+}
+
+func (any *int32Any) ToInt64() int64 {
+	return int64(any.val)
+}
+
+func (any *int32Any) ToUint() uint {
+	return uint(any.val)
+}
+
+func (any *int32Any) ToUint32() uint32 {
+	return uint32(any.val)
+}
+
+func (any *int32Any) ToUint64() uint64 {
+	return uint64(any.val)
+}
+
+func (any *int32Any) ToFloat32() float32 {
+	return float32(any.val)
+}
+
+func (any *int32Any) ToFloat64() float64 {
+	return float64(any.val)
+}
+
+func (any *int32Any) ToString() string {
+	return strconv.FormatInt(int64(any.val), 10)
+}
+
+func (any *int32Any) WriteTo(stream *Stream) {
+	stream.WriteInt32(any.val)
+}
+
+func (any *int32Any) Parse() *Iterator {
+	return nil
+}
+
+func (any *int32Any) GetInterface() interface{} {
+	return any.val
+}

feature_any_int64.go

@@ -0,0 +1,166 @@
+package jsoniter
+
+import (
+	"io"
+	"strconv"
+	"unsafe"
+)
+
+type int64LazyAny struct {
+	baseAny
+	buf   []byte
+	iter  *Iterator
+	err   error
+	cache int64
+}
+
+func (any *int64LazyAny) ValueType() ValueType {
+	return Number
+}
+
+func (any *int64LazyAny) Parse() *Iterator {
+	iter := any.iter
+	if iter == nil {
+		iter = NewIterator(ConfigOfDefault)
+	}
+	iter.ResetBytes(any.buf)
+	return iter
+}
+
+func (any *int64LazyAny) fillCache() {
+	if any.err != nil {
+		return
+	}
+	iter := any.Parse()
+	any.cache = iter.ReadInt64()
+	if iter.Error != io.EOF {
+		iter.reportError("intLazyAny", "there are bytes left")
+	}
+	any.err = iter.Error
+}
+
+func (any *int64LazyAny) LastError() error {
+	return any.err
+}
+
+func (any *int64LazyAny) ToBool() bool {
+	return any.ToInt64() != 0
+}
+
+func (any *int64LazyAny) ToInt() int {
+	any.fillCache()
+	return int(any.cache)
+}
+
+func (any *int64LazyAny) ToInt32() int32 {
+	any.fillCache()
+	return int32(any.cache)
+}
+
+func (any *int64LazyAny) ToInt64() int64 {
+	any.fillCache()
+	return any.cache
+}
+
+func (any *int64LazyAny) ToUint() uint {
+	any.fillCache()
+	return uint(any.cache)
+}
+
+func (any *int64LazyAny) ToUint32() uint32 {
+	any.fillCache()
+	return uint32(any.cache)
+}
+
+func (any *int64LazyAny) ToUint64() uint64 {
+	any.fillCache()
+	return uint64(any.cache)
+}
+
+func (any *int64LazyAny) ToFloat32() float32 {
+	any.fillCache()
+	return float32(any.cache)
+}
+
+func (any *int64LazyAny) ToFloat64() float64 {
+	any.fillCache()
+	return float64(any.cache)
+}
+
+func (any *int64LazyAny) ToString() string {
+	return *(*string)(unsafe.Pointer(&any.buf))
+}
+
+func (any *int64LazyAny) WriteTo(stream *Stream) {
+	stream.Write(any.buf)
+}
+
+func (any *int64LazyAny) GetInterface() interface{} {
+	any.fillCache()
+	return any.cache
+}
+
+type int64Any struct {
+	baseAny
+	val int64
+}
+
+func (any *int64Any) LastError() error {
+	return nil
+}
+
+func (any *int64Any) ValueType() ValueType {
+	return Number
+}
+
+func (any *int64Any) ToBool() bool {
+	return any.val != 0
+}
+
+func (any *int64Any) ToInt() int {
+	return int(any.val)
+}
+
+func (any *int64Any) ToInt32() int32 {
+	return int32(any.val)
+}
+
+func (any *int64Any) ToInt64() int64 {
+	return any.val
+}
+
+func (any *int64Any) ToUint() uint {
+	return uint(any.val)
+}
+
+func (any *int64Any) ToUint32() uint32 {
+	return uint32(any.val)
+}
+
+func (any *int64Any) ToUint64() uint64 {
+	return uint64(any.val)
+}
+
+func (any *int64Any) ToFloat32() float32 {
+	return float32(any.val)
+}
+
+func (any *int64Any) ToFloat64() float64 {
+	return float64(any.val)
+}
+
+func (any *int64Any) ToString() string {
+	return strconv.FormatInt(any.val, 10)
+}
+
+func (any *int64Any) WriteTo(stream *Stream) {
+	stream.WriteInt64(any.val)
+}
+
+func (any *int64Any) Parse() *Iterator {
+	return nil
+}
+
+func (any *int64Any) GetInterface() interface{} {
+	return any.val
+}

feature_any_invalid.go

@@ -0,0 +1,75 @@
+package jsoniter
+
+import "fmt"
+
+type invalidAny struct {
+	baseAny
+	err error
+}
+
+func (any *invalidAny) LastError() error {
+	return any.err
+}
+
+func (any *invalidAny) ValueType() ValueType {
+	return Invalid
+}
+
+func (any *invalidAny) ToBool() bool {
+	return false
+}
+
+func (any *invalidAny) ToInt() int {
+	return 0
+}
+
+func (any *invalidAny) ToInt32() int32 {
+	return 0
+}
+
+func (any *invalidAny) ToInt64() int64 {
+	return 0
+}
+
+func (any *invalidAny) ToUint() uint {
+	return 0
+}
+
+func (any *invalidAny) ToUint32() uint32 {
+	return 0
+}
+
+func (any *invalidAny) ToUint64() uint64 {
+	return 0
+}
+
+func (any *invalidAny) ToFloat32() float32 {
+	return 0
+}
+
+func (any *invalidAny) ToFloat64() float64 {
+	return 0
+}
+
+func (any *invalidAny) ToString() string {
+	return ""
+}
+
+func (any *invalidAny) WriteTo(stream *Stream) {
+}
+
+func (any *invalidAny) Get(path ...interface{}) Any {
+	if any.err == nil {
+		return &invalidAny{baseAny{}, fmt.Errorf("get %v from invalid", path)}
+	} else {
+		return &invalidAny{baseAny{}, fmt.Errorf("%v, get %v from invalid", any.err, path)}
+	}
+}
+
+func (any *invalidAny) Parse() *Iterator {
+	return nil
+}
+
+func (any *invalidAny) GetInterface() interface{} {
+	return nil
+}

feature_any_nil.go

@@ -0,0 +1,65 @@
+package jsoniter
+
+type nilAny struct {
+	baseAny
+}
+
+func (any *nilAny) LastError() error {
+	return nil
+}
+
+func (any *nilAny) ValueType() ValueType {
+	return Nil
+}
+
+func (any *nilAny) ToBool() bool {
+	return false
+}
+
+func (any *nilAny) ToInt() int {
+	return 0
+}
+
+func (any *nilAny) ToInt32() int32 {
+	return 0
+}
+
+func (any *nilAny) ToInt64() int64 {
+	return 0
+}
+
+func (any *nilAny) ToUint() uint {
+	return 0
+}
+
+func (any *nilAny) ToUint32() uint32 {
+	return 0
+}
+
+func (any *nilAny) ToUint64() uint64 {
+	return 0
+}
+
+func (any *nilAny) ToFloat32() float32 {
+	return 0
+}
+
+func (any *nilAny) ToFloat64() float64 {
+	return 0
+}
+
+func (any *nilAny) ToString() string {
+	return ""
+}
+
+func (any *nilAny) WriteTo(stream *Stream) {
+	stream.WriteNil()
+}
+
+func (any *nilAny) Parse() *Iterator {
+	return nil
+}
+
+func (any *nilAny) GetInterface() interface{} {
+	return nil
+}

feature_any_object.go

@@ -0,0 +1,848 @@
+package jsoniter
+
+import (
+	"fmt"
+	"reflect"
+	"unsafe"
+)
+
+type objectLazyAny struct {
+	baseAny
+	buf       []byte
+	iter      *Iterator
+	err       error
+	cache     map[string]Any
+	remaining []byte
+}
+
+func (any *objectLazyAny) ValueType() ValueType {
+	return Object
+}
+
+func (any *objectLazyAny) Parse() *Iterator {
+	iter := any.iter
+	if iter == nil {
+		iter = NewIterator(ConfigOfDefault)
+		any.iter = iter
+	}
+	iter.ResetBytes(any.remaining)
+	return iter
+}
+
+func (any *objectLazyAny) fillCacheUntil(target string) Any {
+	if any.remaining == nil {
+		return any.cache[target]
+	}
+	if any.cache == nil {
+		any.cache = map[string]Any{}
+	}
+	val := any.cache[target]
+	if val != nil {
+		return val
+	}
+	iter := any.Parse()
+	if len(any.remaining) == len(any.buf) {
+		iter.head++
+		c := iter.nextToken()
+		if c != '}' {
+			iter.unreadByte()
+			k := string(iter.readObjectFieldAsBytes())
+			v := iter.readAny(iter)
+			any.cache[k] = v
+			if target == k {
+				any.remaining = iter.buf[iter.head:]
+				any.err = iter.Error
+				return v
+			}
+		} else {
+			any.remaining = nil
+			any.err = iter.Error
+			return nil
+		}
+	}
+	for iter.nextToken() == ',' {
+		k := string(iter.readObjectFieldAsBytes())
+		v := iter.readAny(iter)
+		any.cache[k] = v
+		if target == k {
+			any.remaining = iter.buf[iter.head:]
+			any.err = iter.Error
+			return v
+		}
+	}
+	any.remaining = nil
+	any.err = iter.Error
+	return nil
+}
+
+func (any *objectLazyAny) fillCache() {
+	if any.remaining == nil {
+		return
+	}
+	if any.cache == nil {
+		any.cache = map[string]Any{}
+	}
+	iter := any.Parse()
+	if len(any.remaining) == len(any.buf) {
+		iter.head++
+		c := iter.nextToken()
+		if c != '}' {
+			iter.unreadByte()
+			k := string(iter.readObjectFieldAsBytes())
+			v := iter.readAny(iter)
+			any.cache[k] = v
+		} else {
+			any.remaining = nil
+			any.err = iter.Error
+			return
+		}
+	}
+	for iter.nextToken() == ',' {
+		k := string(iter.readObjectFieldAsBytes())
+		v := iter.readAny(iter)
+		any.cache[k] = v
+	}
+	any.remaining = nil
+	any.err = iter.Error
+	return
+}
+
+func (any *objectLazyAny) LastError() error {
+	return any.err
+}
+
+func (any *objectLazyAny) ToBool() bool {
+	if any.cache == nil {
+		any.IterateObject() // trigger first value read
+	}
+	return len(any.cache) != 0
+}
+
+func (any *objectLazyAny) ToInt() int {
+	if any.cache == nil {
+		any.IterateObject() // trigger first value read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectLazyAny) ToInt32() int32 {
+	if any.cache == nil {
+		any.IterateObject() // trigger first value read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectLazyAny) ToInt64() int64 {
+	if any.cache == nil {
+		any.IterateObject() // trigger first value read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectLazyAny) ToUint() uint {
+	if any.cache == nil {
+		any.IterateObject() // trigger first value read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectLazyAny) ToUint32() uint32 {
+	if any.cache == nil {
+		any.IterateObject() // trigger first value read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectLazyAny) ToUint64() uint64 {
+	if any.cache == nil {
+		any.IterateObject() // trigger first value read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectLazyAny) ToFloat32() float32 {
+	if any.cache == nil {
+		any.IterateObject() // trigger first value read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectLazyAny) ToFloat64() float64 {
+	if any.cache == nil {
+		any.IterateObject() // trigger first value read
+	}
+	if len(any.cache) == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectLazyAny) ToString() string {
+	if len(any.remaining) == len(any.buf) {
+		// nothing has been parsed yet
+		return *(*string)(unsafe.Pointer(&any.buf))
+	} else {
+		any.fillCache()
+		str, err := MarshalToString(any.cache)
+		any.err = err
+		return str
+	}
+}
+
+func (any *objectLazyAny) Get(path ...interface{}) Any {
+	if len(path) == 0 {
+		return any
+	}
+	var element Any
+
+	switch firstPath := path[0].(type) {
+	case string:
+		element = any.fillCacheUntil(firstPath)
+		if element == nil {
+			element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", firstPath, any.cache)}
+		}
+	case int32:
+		if '*' == firstPath {
+			any.fillCache()
+			mappedAll := map[string]Any{}
+			for key, value := range any.cache {
+				mapped := value.Get(path[1:]...)
+				if mapped.ValueType() != Invalid {
+					mappedAll[key] = mapped
+				}
+			}
+			return wrapMap(mappedAll)
+		} else {
+			element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", firstPath, any.cache)}
+		}
+	default:
+		element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", firstPath, any.cache)}
+	}
+	if len(path) == 1 {
+		return element
+	} else {
+		return element.Get(path[1:]...)
+	}
+}
+
+func (any *objectLazyAny) Keys() []string {
+	any.fillCache()
+	keys := make([]string, 0, len(any.cache))
+	for key := range any.cache {
+		keys = append(keys, key)
+	}
+	return keys
+}
+
+func (any *objectLazyAny) Size() int {
+	any.fillCache()
+	return len(any.cache)
+}
+
+func (any *objectLazyAny) IterateObject() (func() (string, Any, bool), bool) {
+	if any.cache == nil {
+		any.cache = map[string]Any{}
+	}
+	remaining := any.remaining
+	if len(remaining) == len(any.buf) {
+		iter := any.Parse()
+		iter.head++
+		c := iter.nextToken()
+		if c != '}' {
+			iter.unreadByte()
+			k := string(iter.readObjectFieldAsBytes())
+			v := iter.readAny(iter)
+			any.cache[k] = v
+			remaining = iter.buf[iter.head:]
+			any.remaining = remaining
+		} else {
+			remaining = nil
+			any.remaining = nil
+			any.err = iter.Error
+			return nil, false
+		}
+	}
+	if len(any.cache) == 0 {
+		return nil, false
+	}
+	keys := make([]string, 0, len(any.cache))
+	values := make([]Any, 0, len(any.cache))
+	for key, value := range any.cache {
+		keys = append(keys, key)
+		values = append(values, value)
+	}
+	nextKey := keys[0]
+	nextValue := values[0]
+	i := 1
+	return func() (string, Any, bool) {
+		key := nextKey
+		value := nextValue
+		if i < len(keys) {
+			// read from cache
+			nextKey = keys[i]
+			nextValue = values[i]
+			i++
+			return key, value, true
+		} else {
+			// read from buffer
+			iter := any.iter
+			if iter == nil {
+				iter = NewIterator(ConfigOfDefault)
+				any.iter = iter
+			}
+			iter.ResetBytes(remaining)
+			c := iter.nextToken()
+			if c == ',' {
+				nextKey = string(iter.readObjectFieldAsBytes())
+				nextValue = iter.readAny(iter)
+				any.cache[nextKey] = nextValue
+				remaining = iter.buf[iter.head:]
+				any.remaining = remaining
+				any.err = iter.Error
+				return key, value, true
+			} else {
+				nextKey = ""
+				remaining = nil
+				any.remaining = nil
+				any.err = iter.Error
+				return key, value, false
+			}
+		}
+	}, true
+}
+
+func (any *objectLazyAny) GetObject() map[string]Any {
+	any.fillCache()
+	return any.cache
+}
+
+func (any *objectLazyAny) SetObject(val map[string]Any) bool {
+	any.fillCache()
+	any.cache = val
+	return true
+}
+
+func (any *objectLazyAny) WriteTo(stream *Stream) {
+	if len(any.remaining) == len(any.buf) {
+		// nothing has been parsed yet
+		stream.Write(any.buf)
+	} else {
+		any.fillCache()
+		stream.WriteVal(any.cache)
+	}
+}
+
+func (any *objectLazyAny) GetInterface() interface{} {
+	any.fillCache()
+	return any.cache
+}
+
+type objectAny struct {
+	baseAny
+	err   error
+	cache map[string]Any
+	val   reflect.Value
+}
+
+func wrapStruct(val interface{}) *objectAny {
+	return &objectAny{baseAny{}, nil, nil, reflect.ValueOf(val)}
+}
+
+func (any *objectAny) ValueType() ValueType {
+	return Object
+}
+
+func (any *objectAny) Parse() *Iterator {
+	return nil
+}
+
+func (any *objectAny) fillCacheUntil(target string) Any {
+	if any.cache == nil {
+		any.cache = map[string]Any{}
+	}
+	element, found := any.cache[target]
+	if found {
+		return element
+	}
+	for i := len(any.cache); i < any.val.NumField(); i++ {
+		field := any.val.Field(i)
+		fieldName := any.val.Type().Field(i).Name
+		var element Any
+		if field.CanInterface() {
+			element = Wrap(field.Interface())
+		} else {
+			element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", fieldName, any.cache)}
+		}
+		any.cache[fieldName] = element
+		if fieldName == target {
+			return element
+		}
+	}
+	return nil
+}
+
+func (any *objectAny) fillCache() {
+	if any.cache == nil {
+		any.cache = map[string]Any{}
+	}
+	if len(any.cache) == any.val.NumField() {
+		return
+	}
+	for i := 0; i < any.val.NumField(); i++ {
+		field := any.val.Field(i)
+		fieldName := any.val.Type().Field(i).Name
+		var element Any
+		if field.CanInterface() {
+			element = Wrap(field.Interface())
+		} else {
+			element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", fieldName, any.cache)}
+		}
+		any.cache[fieldName] = element
+	}
+}
+
+func (any *objectAny) LastError() error {
+	return any.err
+}
+
+func (any *objectAny) ToBool() bool {
+	return any.val.NumField() != 0
+}
+
+func (any *objectAny) ToInt() int {
+	if any.val.NumField() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectAny) ToInt32() int32 {
+	if any.val.NumField() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectAny) ToInt64() int64 {
+	if any.val.NumField() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectAny) ToUint() uint {
+	if any.val.NumField() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectAny) ToUint32() uint32 {
+	if any.val.NumField() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectAny) ToUint64() uint64 {
+	if any.val.NumField() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectAny) ToFloat32() float32 {
+	if any.val.NumField() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectAny) ToFloat64() float64 {
+	if any.val.NumField() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *objectAny) ToString() string {
+	if len(any.cache) == 0 {
+		str, err := MarshalToString(any.val.Interface())
+		any.err = err
+		return str
+	} else {
+		any.fillCache()
+		str, err := MarshalToString(any.cache)
+		any.err = err
+		return str
+	}
+}
+
+func (any *objectAny) Get(path ...interface{}) Any {
+	if len(path) == 0 {
+		return any
+	}
+	var element Any
+	switch firstPath := path[0].(type) {
+	case string:
+		element = any.fillCacheUntil(firstPath)
+		if element == nil {
+			element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", firstPath, any.cache)}
+		}
+	case int32:
+		if '*' == firstPath {
+			any.fillCache()
+			mappedAll := map[string]Any{}
+			for key, value := range any.cache {
+				mapped := value.Get(path[1:]...)
+				if mapped.ValueType() != Invalid {
+					mappedAll[key] = mapped
+				}
+			}
+			return wrapMap(mappedAll)
+		} else {
+			element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", firstPath, any.cache)}
+		}
+	default:
+		element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", firstPath, any.cache)}
+	}
+	if len(path) == 1 {
+		return element
+	} else {
+		return element.Get(path[1:]...)
+	}
+}
+
+func (any *objectAny) Keys() []string {
+	any.fillCache()
+	keys := make([]string, 0, len(any.cache))
+	for key := range any.cache {
+		keys = append(keys, key)
+	}
+	return keys
+}
+
+func (any *objectAny) Size() int {
+	any.fillCache()
+	return len(any.cache)
+}
+
+func (any *objectAny) IterateObject() (func() (string, Any, bool), bool) {
+	if any.cache == nil {
+		any.cache = map[string]Any{}
+	}
+	if any.val.NumField() == 0 {
+		return nil, false
+	}
+	cacheKeys := make([]string, len(any.cache))
+	i := 0
+	for key := range any.cache {
+		cacheKeys[i] = key
+		i++
+	}
+	i = 0
+	return func() (string, Any, bool) {
+		if i == any.val.NumField() {
+			return "", nil, false
+		}
+		var fieldName string
+		var fieldValueAsAny Any
+		if i == len(cacheKeys) {
+			fieldName = any.val.Type().Field(i).Name
+			cacheKeys = append(cacheKeys, fieldName)
+			fieldValue := any.val.Field(i)
+			if fieldValue.CanInterface() {
+				fieldValueAsAny = Wrap(fieldValue.Interface())
+				any.cache[fieldName] = fieldValueAsAny
+			} else {
+				fieldValueAsAny = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", fieldName, any.cache)}
+				any.cache[fieldName] = fieldValueAsAny
+			}
+		} else {
+			fieldName = cacheKeys[i]
+			fieldValueAsAny = any.cache[fieldName]
+		}
+		i++
+		return fieldName, fieldValueAsAny, i != any.val.NumField()
+	}, true
+}
+
+func (any *objectAny) GetObject() map[string]Any {
+	any.fillCache()
+	return any.cache
+}
+
+func (any *objectAny) SetObject(val map[string]Any) bool {
+	any.fillCache()
+	any.cache = val
+	return true
+}
+
+func (any *objectAny) WriteTo(stream *Stream) {
+	if len(any.cache) == 0 {
+		// nothing has been parsed yet
+		stream.WriteVal(any.val)
+	} else {
+		any.fillCache()
+		stream.WriteVal(any.cache)
+	}
+}
+
+func (any *objectAny) GetInterface() interface{} {
+	any.fillCache()
+	return any.cache
+}
+
+type mapAny struct {
+	baseAny
+	err   error
+	cache map[string]Any
+	val   reflect.Value
+}
+
+func wrapMap(val interface{}) *mapAny {
+	return &mapAny{baseAny{}, nil, nil, reflect.ValueOf(val)}
+}
+
+func (any *mapAny) ValueType() ValueType {
+	return Object
+}
+
+func (any *mapAny) Parse() *Iterator {
+	return nil
+}
+
+func (any *mapAny) fillCacheUntil(target string) Any {
+	if any.cache == nil {
+		any.cache = map[string]Any{}
+	}
+	element, found := any.cache[target]
+	if found {
+		return element
+	}
+	for _, key := range any.val.MapKeys() {
+		keyAsStr := key.String()
+		_, found := any.cache[keyAsStr]
+		if found {
+			continue
+		}
+		element := Wrap(any.val.MapIndex(key).Interface())
+		any.cache[keyAsStr] = element
+		if keyAsStr == target {
+			return element
+		}
+	}
+	return nil
+}
+
+func (any *mapAny) fillCache() {
+	if any.cache == nil {
+		any.cache = map[string]Any{}
+	}
+	if len(any.cache) == any.val.Len() {
+		return
+	}
+	for _, key := range any.val.MapKeys() {
+		keyAsStr := key.String()
+		element := Wrap(any.val.MapIndex(key).Interface())
+		any.cache[keyAsStr] = element
+	}
+}
+
+func (any *mapAny) LastError() error {
+	return any.err
+}
+
+func (any *mapAny) ToBool() bool {
+	return any.val.Len() != 0
+}
+
+func (any *mapAny) ToInt() int {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *mapAny) ToInt32() int32 {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *mapAny) ToInt64() int64 {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *mapAny) ToUint() uint {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *mapAny) ToUint32() uint32 {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *mapAny) ToUint64() uint64 {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *mapAny) ToFloat32() float32 {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *mapAny) ToFloat64() float64 {
+	if any.val.Len() == 0 {
+		return 0
+	}
+	return 1
+}
+
+func (any *mapAny) ToString() string {
+	if len(any.cache) == 0 {
+		str, err := MarshalToString(any.val.Interface())
+		any.err = err
+		return str
+	} else {
+		any.fillCache()
+		str, err := MarshalToString(any.cache)
+		any.err = err
+		return str
+	}
+}
+
+func (any *mapAny) Get(path ...interface{}) Any {
+	if len(path) == 0 {
+		return any
+	}
+	var element Any
+	switch firstPath := path[0].(type) {
+	case string:
+		element = any.fillCacheUntil(firstPath)
+		if element == nil {
+			element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", firstPath, any.cache)}
+		}
+	case int32:
+		if '*' == firstPath {
+			any.fillCache()
+			mappedAll := map[string]Any{}
+			for key, value := range any.cache {
+				mapped := value.Get(path[1:]...)
+				if mapped.ValueType() != Invalid {
+					mappedAll[key] = mapped
+				}
+			}
+			return wrapMap(mappedAll)
+		} else {
+			element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", firstPath, any.cache)}
+		}
+	default:
+		element = &invalidAny{baseAny{}, fmt.Errorf("%v not found in %v", firstPath, any.cache)}
+	}
+	if len(path) == 1 {
+		return element
+	} else {
+		return element.Get(path[1:]...)
+	}
+}
+
+func (any *mapAny) Keys() []string {
+	any.fillCache()
+	keys := make([]string, 0, len(any.cache))
+	for key := range any.cache {
+		keys = append(keys, key)
+	}
+	return keys
+}
+
+func (any *mapAny) Size() int {
+	any.fillCache()
+	return len(any.cache)
+}
+
+func (any *mapAny) IterateObject() (func() (string, Any, bool), bool) {
+	any.fillCache()
+	if len(any.cache) == 0 {
+		return nil, false
+	}
+	keys := make([]string, len(any.cache))
+	values := make([]Any, len(any.cache))
+	i := 0
+	for k, v := range any.cache {
+		keys[i] = k
+		values[i] = v
+		i++
+	}
+	i = 0
+	return func() (string, Any, bool) {
+		if i == len(keys) {
+			return "", nil, false
+		}
+		k := keys[i]
+		v := values[i]
+		i++
+		return k, v, i != len(keys)
+	}, true
+}
+
+func (any *mapAny) GetObject() map[string]Any {
+	any.fillCache()
+	return any.cache
+}
+
+func (any *mapAny) SetObject(val map[string]Any) bool {
+	any.fillCache()
+	any.cache = val
+	return true
+}
+
+func (any *mapAny) WriteTo(stream *Stream) {
+	if len(any.cache) == 0 {
+		// nothing has been parsed yet
+		stream.WriteVal(any.val)
+	} else {
+		any.fillCache()
+		stream.WriteVal(any.cache)
+	}
+}
+
+func (any *mapAny) GetInterface() interface{} {
+	any.fillCache()
+	return any.cache
+}

feature_any_string.go

@@ -0,0 +1,230 @@
+package jsoniter
+
+import (
+	"io"
+	"strconv"
+)
+
+type stringLazyAny struct {
+	baseAny
+	buf   []byte
+	iter  *Iterator
+	err   error
+	cache string
+}
+
+func (any *stringLazyAny) ValueType() ValueType {
+	return String
+}
+
+func (any *stringLazyAny) Parse() *Iterator {
+	iter := any.iter
+	if iter == nil {
+		iter = NewIterator(ConfigOfDefault)
+		any.iter = iter
+	}
+	iter.ResetBytes(any.buf)
+	return iter
+}
+
+func (any *stringLazyAny) fillCache() {
+	if any.err != nil {
+		return
+	}
+	iter := any.Parse()
+	any.cache = iter.ReadString()
+	if iter.Error != io.EOF {
+		iter.reportError("stringLazyAny", "there are bytes left")
+	}
+	any.err = iter.Error
+}
+
+func (any *stringLazyAny) LastError() error {
+	return any.err
+}
+
+func (any *stringLazyAny) ToBool() bool {
+	str := any.ToString()
+	if str == "false" {
+		return false
+	}
+	for _, c := range str {
+		switch c {
+		case ' ', '\n', '\r', '\t':
+		default:
+			return true
+		}
+	}
+	return false
+}
+
+func (any *stringLazyAny) ToInt() int {
+	iter := any.Parse()
+	iter.head++
+	val := iter.ReadInt()
+	any.err = iter.Error
+	return val
+}
+
+func (any *stringLazyAny) ToInt32() int32 {
+	iter := any.Parse()
+	iter.head++
+	val := iter.ReadInt32()
+	any.err = iter.Error
+	return val
+}
+
+func (any *stringLazyAny) ToInt64() int64 {
+	iter := any.Parse()
+	iter.head++
+	val := iter.ReadInt64()
+	any.err = iter.Error
+	return val
+}
+
+func (any *stringLazyAny) ToUint() uint {
+	iter := any.Parse()
+	iter.head++
+	val := iter.ReadUint()
+	any.err = iter.Error
+	return val
+}
+
+func (any *stringLazyAny) ToUint32() uint32 {
+	iter := any.Parse()
+	iter.head++
+	val := iter.ReadUint32()
+	any.err = iter.Error
+	return val
+}
+
+func (any *stringLazyAny) ToUint64() uint64 {
+	iter := any.Parse()
+	iter.head++
+	val := iter.ReadUint64()
+	any.err = iter.Error
+	return val
+}
+
+func (any *stringLazyAny) ToFloat32() float32 {
+	iter := any.Parse()
+	iter.head++
+	val := iter.ReadFloat32()
+	any.err = iter.Error
+	return val
+}
+
+func (any *stringLazyAny) ToFloat64() float64 {
+	iter := any.Parse()
+	iter.head++
+	val := iter.ReadFloat64()
+	any.err = iter.Error
+	return val
+}
+
+func (any *stringLazyAny) ToString() string {
+	any.fillCache()
+	return any.cache
+}
+
+func (any *stringLazyAny) WriteTo(stream *Stream) {
+	stream.Write(any.buf)
+}
+
+func (any *stringLazyAny) GetInterface() interface{} {
+	any.fillCache()
+	return any.cache
+}
+
+type stringAny struct {
+	baseAny
+	err error
+	val string
+}
+
+func (any *stringAny) Parse() *Iterator {
+	return nil
+}
+
+func (any *stringAny) ValueType() ValueType {
+	return String
+}
+
+func (any *stringAny) LastError() error {
+	return any.err
+}
+
+func (any *stringAny) ToBool() bool {
+	str := any.ToString()
+	if str == "false" {
+		return false
+	}
+	for _, c := range str {
+		switch c {
+		case ' ', '\n', '\r', '\t':
+		default:
+			return true
+		}
+	}
+	return false
+}
+
+func (any *stringAny) ToInt() int {
+	parsed, err := strconv.ParseInt(any.val, 10, 64)
+	any.err = err
+	return int(parsed)
+}
+
+func (any *stringAny) ToInt32() int32 {
+	parsed, err := strconv.ParseInt(any.val, 10, 32)
+	any.err = err
+	return int32(parsed)
+}
+
+func (any *stringAny) ToInt64() int64 {
+	parsed, err := strconv.ParseInt(any.val, 10, 64)
+	any.err = err
+	return parsed
+}
+
+func (any *stringAny) ToUint() uint {
+	parsed, err := strconv.ParseUint(any.val, 10, 64)
+	any.err = err
+	return uint(parsed)
+}
+
+func (any *stringAny) ToUint32() uint32 {
+	parsed, err := strconv.ParseUint(any.val, 10, 32)
+	any.err = err
+	return uint32(parsed)
+}
+
+func (any *stringAny) ToUint64() uint64 {
+	parsed, err := strconv.ParseUint(any.val, 10, 64)
+	any.err = err
+	return parsed
+}
+
+func (any *stringAny) ToFloat32() float32 {
+	parsed, err := strconv.ParseFloat(any.val, 32)
+	any.err = err
+	return float32(parsed)
+}
+
+func (any *stringAny) ToFloat64() float64 {
+	parsed, err := strconv.ParseFloat(any.val, 64)
+	any.err = err
+	return parsed
+}
+
+func (any *stringAny) ToString() string {
+	return any.val
+}
+
+func (any *stringAny) WriteTo(stream *Stream) {
+	stream.WriteString(any.val)
+}
+
+func (any *stringAny) GetInterface() interface{} {
+	return any.val
+}

feature_any_uint32.go

@@ -0,0 +1,70 @@
+package jsoniter
+
+import (
+	"strconv"
+)
+
+type uint32Any struct {
+	baseAny
+	val uint32
+}
+
+func (any *uint32Any) LastError() error {
+	return nil
+}
+
+func (any *uint32Any) ValueType() ValueType {
+	return Number
+}
+
+func (any *uint32Any) ToBool() bool {
+	return any.val != 0
+}
+
+func (any *uint32Any) ToInt() int {
+	return int(any.val)
+}
+
+func (any *uint32Any) ToInt32() int32 {
+	return int32(any.val)
+}
+
+func (any *uint32Any) ToInt64() int64 {
+	return int64(any.val)
+}
+
+func (any *uint32Any) ToUint() uint {
+	return uint(any.val)
+}
+
+func (any *uint32Any) ToUint32() uint32 {
+	return any.val
+}
+
+func (any *uint32Any) ToUint64() uint64 {
+	return uint64(any.val)
+}
+
+func (any *uint32Any) ToFloat32() float32 {
+	return float32(any.val)
+}
+
+func (any *uint32Any) ToFloat64() float64 {
+	return float64(any.val)
+}
+
+func (any *uint32Any) ToString() string {
+	return strconv.FormatInt(int64(any.val), 10)
+}
+
+func (any *uint32Any) WriteTo(stream *Stream) {
+	stream.WriteUint32(any.val)
+}
+
+func (any *uint32Any) Parse() *Iterator {
+	return nil
+}
+
+func (any *uint32Any) GetInterface() interface{} {
+	return any.val
+}

feature_any_uint64.go

@@ -0,0 +1,166 @@
+package jsoniter
+
+import (
+	"io"
+	"strconv"
+	"unsafe"
+)
+
+type uint64LazyAny struct {
+	baseAny
+	buf   []byte
+	iter  *Iterator
+	err   error
+	cache uint64
+}
+
+func (any *uint64LazyAny) ValueType() ValueType {
+	return Number
+}
+
+func (any *uint64LazyAny) Parse() *Iterator {
+	iter := any.iter
+	if iter == nil {
+		iter = NewIterator(ConfigOfDefault)
+	}
+	iter.ResetBytes(any.buf)
+	return iter
+}
+
+func (any *uint64LazyAny) fillCache() {
+	if any.err != nil {
+		return
+	}
+	iter := any.Parse()
+	any.cache = iter.ReadUint64()
+	if iter.Error != io.EOF {
+		iter.reportError("intLazyAny", "there are bytes left")
+	}
+	any.err = iter.Error
+}
+
+func (any *uint64LazyAny) LastError() error {
+	return any.err
+}
+
+func (any *uint64LazyAny) ToBool() bool {
+	return any.ToInt64() != 0
+}
+
+func (any *uint64LazyAny) ToInt() int {
+	any.fillCache()
+	return int(any.cache)
+}
+
+func (any *uint64LazyAny) ToInt32() int32 {
+	any.fillCache()
+	return int32(any.cache)
+}
+
+func (any *uint64LazyAny) ToInt64() int64 {
+	any.fillCache()
+	return int64(any.cache)
+}
+
+func (any *uint64LazyAny) ToUint() uint {
+	any.fillCache()
+	return uint(any.cache)
+}
+
+func (any *uint64LazyAny) ToUint32() uint32 {
+	any.fillCache()
+	return uint32(any.cache)
+}
+
+func (any *uint64LazyAny) ToUint64() uint64 {
+	any.fillCache()
+	return any.cache
+}
+
+func (any *uint64LazyAny) ToFloat32() float32 {
+	any.fillCache()
+	return float32(any.cache)
+}
+
+func (any *uint64LazyAny) ToFloat64() float64 {
+	any.fillCache()
+	return float64(any.cache)
+}
+
+func (any *uint64LazyAny) ToString() string {
+	return *(*string)(unsafe.Pointer(&any.buf))
+}
+
+func (any *uint64LazyAny) WriteTo(stream *Stream) {
+	stream.Write(any.buf)
+}
+
+func (any *uint64LazyAny) GetInterface() interface{} {
+	any.fillCache()
+	return any.cache
+}
+
+type uint64Any struct {
+	baseAny
+	val uint64
+}
+
+func (any *uint64Any) LastError() error {
+	return nil
+}
+
+func (any *uint64Any) ValueType() ValueType {
+	return Number
+}
+
+func (any *uint64Any) ToBool() bool {
+	return any.val != 0
+}
+
+func (any *uint64Any) ToInt() int {
+	return int(any.val)
+}
+
+func (any *uint64Any) ToInt32() int32 {
+	return int32(any.val)
+}
+
+func (any *uint64Any) ToInt64() int64 {
+	return int64(any.val)
+}
+
+func (any *uint64Any) ToUint() uint {
+	return uint(any.val)
+}
+
+func (any *uint64Any) ToUint32() uint32 {
+	return uint32(any.val)
+}
+
+func (any *uint64Any) ToUint64() uint64 {
+	return any.val
+}
+
+func (any *uint64Any) ToFloat32() float32 {
+	return float32(any.val)
+}
+
+func (any *uint64Any) ToFloat64() float64 {
+	return float64(any.val)
+}
+
+func (any *uint64Any) ToString() string {
+	return strconv.FormatUint(any.val, 10)
+}
+
+func (any *uint64Any) WriteTo(stream *Stream) {
+	stream.WriteUint64(any.val)
+}
+
+func (any *uint64Any) Parse() *Iterator {
+	return nil
+}
+
+func (any *uint64Any) GetInterface() interface{} {
+	return any.val
+}

feature_config.go

@@ -0,0 +1,239 @@
+package jsoniter
+
+import (
+	"io"
+	"reflect"
+	"sync/atomic"
+	"unsafe"
+	"errors"
+)
+
+type Config struct {
+	IndentionStep                 int
+	MarshalFloatWith6Digits       bool
+	SupportUnexportedStructFields bool
+	EscapeHtml                    bool
+	SortMapKeys                   bool
+}
+
+type frozenConfig struct {
+	configBeforeFrozen Config
+	sortMapKeys        bool
+	indentionStep      int
+	decoderCache       unsafe.Pointer
+	encoderCache       unsafe.Pointer
+	extensions         []ExtensionFunc
+}
+
+var ConfigOfDefault = Config{}.Froze()
+
+// Trying to be 100% compatible with standard library behavior
+var ConfigCompatibleWithStandardLibrary = Config{
+	EscapeHtml:  true,
+	SortMapKeys: true,
+}.Froze()
+
+func (cfg Config) Froze() *frozenConfig {
+	frozenConfig := &frozenConfig{
+		sortMapKeys: cfg.SortMapKeys,
+		indentionStep: cfg.IndentionStep,
+	}
+	atomic.StorePointer(&frozenConfig.decoderCache, unsafe.Pointer(&map[string]Decoder{}))
+	atomic.StorePointer(&frozenConfig.encoderCache, unsafe.Pointer(&map[string]Encoder{}))
+	if cfg.MarshalFloatWith6Digits {
+		frozenConfig.marshalFloatWith6Digits()
+	}
+	if cfg.SupportUnexportedStructFields {
+		frozenConfig.supportUnexportedStructFields()
+	}
+	if cfg.EscapeHtml {
+		frozenConfig.escapeHtml()
+	}
+	frozenConfig.configBeforeFrozen = cfg
+	return frozenConfig
+}
+
+// RegisterExtension can register a custom extension
+func (cfg *frozenConfig) registerExtension(extension ExtensionFunc) {
+	cfg.extensions = append(cfg.extensions, extension)
+}
+
+func (cfg *frozenConfig) supportUnexportedStructFields() {
+	cfg.registerExtension(func(type_ reflect.Type, field *reflect.StructField) ([]string, EncoderFunc, DecoderFunc) {
+		return []string{field.Name}, nil, nil
+	})
+}
+
+// EnableLossyFloatMarshalling keeps 10**(-6) precision
+// for float variables for better performance.
+func (cfg *frozenConfig) marshalFloatWith6Digits() {
+	// for better performance
+	cfg.addEncoderToCache(reflect.TypeOf((*float32)(nil)).Elem(), &funcEncoder{func(ptr unsafe.Pointer, stream *Stream) {
+		val := *((*float32)(ptr))
+		stream.WriteFloat32Lossy(val)
+	}})
+	cfg.addEncoderToCache(reflect.TypeOf((*float64)(nil)).Elem(), &funcEncoder{func(ptr unsafe.Pointer, stream *Stream) {
+		val := *((*float64)(ptr))
+		stream.WriteFloat64Lossy(val)
+	}})
+}
+
+func (cfg *frozenConfig) escapeHtml() {
+	// for better performance
+	cfg.addEncoderToCache(reflect.TypeOf((*string)(nil)).Elem(), &funcEncoder{func(ptr unsafe.Pointer, stream *Stream) {
+		val := *((*string)(ptr))
+		stream.WriteStringWithHtmlEscaped(val)
+	}})
+}
+
+func (cfg *frozenConfig) addDecoderToCache(cacheKey reflect.Type, decoder Decoder) {
+	done := false
+	for !done {
+		ptr := atomic.LoadPointer(&cfg.decoderCache)
+		cache := *(*map[reflect.Type]Decoder)(ptr)
+		copied := map[reflect.Type]Decoder{}
+		for k, v := range cache {
+			copied[k] = v
+		}
+		copied[cacheKey] = decoder
+		done = atomic.CompareAndSwapPointer(&cfg.decoderCache, ptr, unsafe.Pointer(&copied))
+	}
+}
+
+func (cfg *frozenConfig) addEncoderToCache(cacheKey reflect.Type, encoder Encoder) {
+	done := false
+	for !done {
+		ptr := atomic.LoadPointer(&cfg.encoderCache)
+		cache := *(*map[reflect.Type]Encoder)(ptr)
+		copied := map[reflect.Type]Encoder{}
+		for k, v := range cache {
+			copied[k] = v
+		}
+		copied[cacheKey] = encoder
+		done = atomic.CompareAndSwapPointer(&cfg.encoderCache, ptr, unsafe.Pointer(&copied))
+	}
+}
+
+func (cfg *frozenConfig) getDecoderFromCache(cacheKey reflect.Type) Decoder {
+	ptr := atomic.LoadPointer(&cfg.decoderCache)
+	cache := *(*map[reflect.Type]Decoder)(ptr)
+	return cache[cacheKey]
+}
+
+func (cfg *frozenConfig) getEncoderFromCache(cacheKey reflect.Type) Encoder {
+	ptr := atomic.LoadPointer(&cfg.encoderCache)
+	cache := *(*map[reflect.Type]Encoder)(ptr)
+	return cache[cacheKey]
+}
+
+// CleanDecoders cleans decoders registered or cached
+func (cfg *frozenConfig) CleanDecoders() {
+	typeDecoders = map[string]Decoder{}
+	fieldDecoders = map[string]Decoder{}
+	atomic.StorePointer(&cfg.decoderCache, unsafe.Pointer(&map[string]Decoder{}))
+}
+
+// CleanEncoders cleans encoders registered or cached
+func (cfg *frozenConfig) CleanEncoders() {
+	typeEncoders = map[string]Encoder{}
+	fieldEncoders = map[string]Encoder{}
+	atomic.StorePointer(&cfg.encoderCache, unsafe.Pointer(&map[string]Encoder{}))
+}
+
+func (cfg *frozenConfig) MarshalToString(v interface{}) (string, error) {
+	buf, err := cfg.Marshal(v)
+	if err != nil {
+		return "", err
+	}
+	return string(buf), nil
+}
+
+func (cfg *frozenConfig) Marshal(v interface{}) ([]byte, error) {
+	stream := NewStream(cfg, nil, 256)
+	stream.WriteVal(v)
+	if stream.Error != nil {
+		return nil, stream.Error
+	}
+	return stream.Buffer(), nil
+}
+
+func (cfg *frozenConfig) UnmarshalFromString(str string, v interface{}) error {
+	data := []byte(str)
+	data = data[:lastNotSpacePos(data)]
+	iter := ParseBytes(cfg, data)
+	iter.ReadVal(v)
+	if iter.head == iter.tail {
+		iter.loadMore()
+	}
+	if iter.Error == io.EOF {
+		return nil
+	}
+	if iter.Error == nil {
+		iter.reportError("UnmarshalFromString", "there are bytes left after unmarshal")
+	}
+	return iter.Error
+}
+
+func (cfg *frozenConfig) NewEncoder(writer io.Writer) *AdaptedEncoder {
+	stream := NewStream(cfg, writer, 512)
+	return &AdaptedEncoder{stream}
+}
+
+func (cfg *frozenConfig) NewDecoder(reader io.Reader) *AdaptedDecoder {
+	iter := Parse(cfg, reader, 512)
+	return &AdaptedDecoder{iter}
+}
+
+func (cfg *frozenConfig) UnmarshalAnyFromString(str string) (Any, error) {
+	data := []byte(str)
+	data = data[:lastNotSpacePos(data)]
+	iter := ParseBytes(cfg, data)
+	any := iter.ReadAny()
+	if iter.head == iter.tail {
+		iter.loadMore()
+	}
+	if iter.Error == io.EOF {
+		return any, nil
+	}
+	if iter.Error == nil {
+		iter.reportError("UnmarshalAnyFromString", "there are bytes left after unmarshal")
+	}
+	return nil, iter.Error
+}
+
+func (cfg *frozenConfig) UnmarshalAny(data []byte) (Any, error) {
+	data = data[:lastNotSpacePos(data)]
+	iter := ParseBytes(cfg, data)
+	any := iter.ReadAny()
+	if iter.head == iter.tail {
+		iter.loadMore()
+	}
+	if iter.Error == io.EOF {
+		return any, nil
+	}
+	if iter.Error == nil {
+		iter.reportError("UnmarshalAny", "there are bytes left after unmarshal")
+	}
+	return any, iter.Error
+}
+
+func (cfg *frozenConfig) Unmarshal(data []byte, v interface{}) error {
+	data = data[:lastNotSpacePos(data)]
+	iter := ParseBytes(cfg, data)
+	typ := reflect.TypeOf(v)
+	if typ.Kind() != reflect.Ptr {
+		// return non-pointer error
+		return errors.New("the second param must be ptr type")
+	}
+	iter.ReadVal(v)
+	if iter.head == iter.tail {
+		iter.loadMore()
+	}
+	if iter.Error == io.EOF {
+		return nil
+	}
+	if iter.Error == nil {
+		iter.reportError("Unmarshal", "there are bytes left after unmarshal")
+	}
+	return iter.Error
+}

feature_iter.go

@@ -0,0 +1,288 @@
+//
+// Besides, jsoniter.Iterator provides a different set of interfaces
+// iterating given bytes/string/reader
+// and yielding parsed elements one by one.
+// This set of interfaces reads input as required and gives
+// better performance.
+package jsoniter
+
+import (
+	"encoding/base64"
+	"fmt"
+	"io"
+)
+
+type ValueType int
+
+const (
+	Invalid ValueType = iota
+	String
+	Number
+	Nil
+	Bool
+	Array
+	Object
+)
+
+var hexDigits []byte
+var valueTypes []ValueType
+
+func init() {
+	hexDigits = make([]byte, 256)
+	for i := 0; i < len(hexDigits); i++ {
+		hexDigits[i] = 255
+	}
+	for i := '0'; i <= '9'; i++ {
+		hexDigits[i] = byte(i - '0')
+	}
+	for i := 'a'; i <= 'f'; i++ {
+		hexDigits[i] = byte((i - 'a') + 10)
+	}
+	for i := 'A'; i <= 'F'; i++ {
+		hexDigits[i] = byte((i - 'A') + 10)
+	}
+	valueTypes = make([]ValueType, 256)
+	for i := 0; i < len(valueTypes); i++ {
+		valueTypes[i] = Invalid
+	}
+	valueTypes['"'] = String
+	valueTypes['-'] = Number
+	valueTypes['0'] = Number
+	valueTypes['1'] = Number
+	valueTypes['2'] = Number
+	valueTypes['3'] = Number
+	valueTypes['4'] = Number
+	valueTypes['5'] = Number
+	valueTypes['6'] = Number
+	valueTypes['7'] = Number
+	valueTypes['8'] = Number
+	valueTypes['9'] = Number
+	valueTypes['t'] = Bool
+	valueTypes['f'] = Bool
+	valueTypes['n'] = Nil
+	valueTypes['['] = Array
+	valueTypes['{'] = Object
+}
+
+// Iterator is a fast and flexible JSON parser
+type Iterator struct {
+	cfg    *frozenConfig
+	reader io.Reader
+	buf    []byte
+	head   int
+	tail   int
+	Error  error
+}
+
+// Create creates an empty Iterator instance
+func NewIterator(cfg *frozenConfig) *Iterator {
+	return &Iterator{
+		cfg:    cfg,
+		reader: nil,
+		buf:    nil,
+		head:   0,
+		tail:   0,
+	}
+}
+
+// Parse parses a json buffer in io.Reader into an Iterator instance
+func Parse(cfg *frozenConfig, reader io.Reader, bufSize int) *Iterator {
+	return &Iterator{
+		cfg:    cfg,
+		reader: reader,
+		buf:    make([]byte, bufSize),
+		head:   0,
+		tail:   0,
+	}
+}
+
+// ParseBytes parses a json byte slice into an Iterator instance
+func ParseBytes(cfg *frozenConfig, input []byte) *Iterator {
+	return &Iterator{
+		cfg:    cfg,
+		reader: nil,
+		buf:    input,
+		head:   0,
+		tail:   len(input),
+	}
+}
+
+// ParseString parses a json string into an Iterator instance
+func ParseString(cfg *frozenConfig, input string) *Iterator {
+	return ParseBytes(cfg, []byte(input))
+}
+
+// Reset can reset an Iterator instance for another json buffer in io.Reader
+func (iter *Iterator) Reset(reader io.Reader) *Iterator {
+	iter.reader = reader
+	iter.head = 0
+	iter.tail = 0
+	return iter
+}
+
+// ResetBytes can reset an Iterator instance for another json byte slice
+func (iter *Iterator) ResetBytes(input []byte) *Iterator {
+	iter.reader = nil
+	iter.Error = nil
+	iter.buf = input
+	iter.head = 0
+	iter.tail = len(input)
+	return iter
+}
+
+// WhatIsNext gets ValueType of relatively next json object
+func (iter *Iterator) WhatIsNext() ValueType {
+	valueType := valueTypes[iter.nextToken()]
+	iter.unreadByte()
+	return valueType
+}
+
+func (iter *Iterator) skipWhitespacesWithoutLoadMore() bool {
+	for i := iter.head; i < iter.tail; i++ {
+		c := iter.buf[i]
+		switch c {
+		case ' ', '\n', '\t', '\r':
+			continue
+		}
+		iter.head = i
+		return false
+	}
+	return true
+}
+
+func (iter *Iterator) nextToken() byte {
+	// a variation of skip whitespaces, returning the next non-whitespace token
+	for {
+		for i := iter.head; i < iter.tail; i++ {
+			c := iter.buf[i]
+			switch c {
+			case ' ', '\n', '\t', '\r':
+				continue
+			}
+			iter.head = i + 1
+			return c
+		}
+		if !iter.loadMore() {
+			return 0
+		}
+	}
+}
+
+func (iter *Iterator) reportError(operation string, msg string) {
+	if iter.Error != nil {
+		if iter.Error != io.EOF {
+			return
+		}
+	}
+	peekStart := iter.head - 10
+	if peekStart < 0 {
+		peekStart = 0
+	}
+	iter.Error = fmt.Errorf("%s: %s, parsing %v ...%s... at %s", operation, msg, iter.head,
+		string(iter.buf[peekStart:iter.head]), string(iter.buf[0:iter.tail]))
+}
+
+// CurrentBuffer gets current buffer as string
+func (iter *Iterator) CurrentBuffer() string {
+	peekStart := iter.head - 10
+	if peekStart < 0 {
+		peekStart = 0
+	}
+	return fmt.Sprintf("parsing %v ...|%s|... at %s", iter.head,
+		string(iter.buf[peekStart:iter.head]), string(iter.buf[0:iter.tail]))
+}
+
+func (iter *Iterator) readByte() (ret byte) {
+	if iter.head == iter.tail {
+		if iter.loadMore() {
+			ret = iter.buf[iter.head]
+			iter.head++
+			return ret
+		}
+		return 0
+	}
+	ret = iter.buf[iter.head]
+	iter.head++
+	return ret
+}
+
+func (iter *Iterator) loadMore() bool {
+	if iter.reader == nil {
+		if iter.Error == nil {
+			iter.Error = io.EOF
+		}
+		return false
+	}
+	for {
+		n, err := iter.reader.Read(iter.buf)
+		if n == 0 {
+			if err != nil {
+				if iter.Error == nil {
+					iter.Error = err
+				}
+				return false
+			}
+		} else {
+			iter.head = 0
+			iter.tail = n
+			return true
+		}
+	}
+}
+
+func (iter *Iterator) unreadByte() {
+	if iter.head == 0 {
+		iter.reportError("unreadByte", "unread too many bytes")
+		return
+	}
+	iter.head--
+	return
+}
+
+func (iter *Iterator) Read() interface{} {
+	valueType := iter.WhatIsNext()
+	switch valueType {
+	case String:
+		return iter.ReadString()
+	case Number:
+		return iter.ReadFloat64()
+	case Nil:
+		iter.skipFixedBytes(4) // null
+		return nil
+	case Bool:
+		return iter.ReadBool()
+	case Array:
+		arr := []interface{}{}
+		iter.ReadArrayCB(func(iter *Iterator) bool {
+			arr = append(arr, iter.Read())
+			return true
+		})
+		return arr
+	case Object:
+		obj := map[string]interface{}{}
+		iter.ReadObjectCB(func(Iter *Iterator, field string) bool {
+			obj[field] = iter.Read()
+			return true
+		})
+		return obj
+	default:
+		iter.reportError("Read", fmt.Sprintf("unexpected value type: %v", valueType))
+		return nil
+	}
+}
+
+// ReadBase64 reads a json object as Base64 in byte slice
+func (iter *Iterator) ReadBase64() (ret []byte) {
+	src := iter.ReadStringAsSlice()
+	if iter.Error != nil {
+		return
+	}
+	b64 := base64.StdEncoding
+	ret = make([]byte, b64.DecodedLen(len(src)))
+	n, err := b64.Decode(ret, src)
+	if err != nil {
+		iter.Error = err
+		return
+	}
+	return ret[:n]
+}

feature_iter_array.go

@@ -0,0 +1,50 @@
+package jsoniter
+
+func (iter *Iterator) ReadArray() (ret bool) {
+	c := iter.nextToken()
+	switch c {
+	case 'n':
+		iter.skipFixedBytes(3)
+		return false // null
+	case '[':
+		c = iter.nextToken()
+		if c != ']' {
+			iter.unreadByte()
+			return true
+		}
+		return false
+	case ']':
+		return false
+	case ',':
+		return true
+	default:
+		iter.reportError("ReadArray", "expect [ or , or ] or n, but found: "+string([]byte{c}))
+		return
+	}
+}
+
+func (iter *Iterator) ReadArrayCB(callback func(*Iterator) bool) (ret bool) {
+	c := iter.nextToken()
+	if c == '[' {
+		c = iter.nextToken()
+		if c != ']' {
+			iter.unreadByte()
+			if !callback(iter) {
+				return false
+			}
+			for iter.nextToken() == ',' {
+				if !callback(iter) {
+					return false
+				}
+			}
+			return true
+		}
+		return true
+	}
+	if c == 'n' {
+		iter.skipFixedBytes(3)
+		return true // null
+	}
+	iter.reportError("ReadArrayCB", "expect [ or n, but found: "+string([]byte{c}))
+	return false
+}

feature_iter_float.go

@@ -0,0 +1,240 @@
+package jsoniter
+
+import (
+	"io"
+	"math/big"
+	"strconv"
+	"unsafe"
+)
+
+var floatDigits []int8
+
+const invalidCharForNumber = int8(-1)
+const endOfNumber = int8(-2)
+const dotInNumber = int8(-3)
+
+func init() {
+	floatDigits = make([]int8, 256)
+	for i := 0; i < len(floatDigits); i++ {
+		floatDigits[i] = invalidCharForNumber
+	}
+	for i := int8('0'); i <= int8('9'); i++ {
+		floatDigits[i] = i - int8('0')
+	}
+	floatDigits[','] = endOfNumber
+	floatDigits[']'] = endOfNumber
+	floatDigits['}'] = endOfNumber
+	floatDigits[' '] = endOfNumber
+	floatDigits['\t'] = endOfNumber
+	floatDigits['\n'] = endOfNumber
+	floatDigits['.'] = dotInNumber
+}
+
+func (iter *Iterator) ReadBigFloat() (ret *big.Float) {
+	str := iter.readNumberAsString()
+	if iter.Error != nil && iter.Error != io.EOF {
+		return nil
+	}
+	prec := 64
+	if len(str) > prec {
+		prec = len(str)
+	}
+	val, _, err := big.ParseFloat(str, 10, uint(prec), big.ToZero)
+	if err != nil {
+		iter.Error = err
+		return nil
+	}
+	return val
+}
+
+func (iter *Iterator) ReadBigInt() (ret *big.Int) {
+	str := iter.readNumberAsString()
+	if iter.Error != nil && iter.Error != io.EOF {
+		return nil
+	}
+	ret = big.NewInt(0)
+	var success bool
+	ret, success = ret.SetString(str, 10)
+	if !success {
+		iter.reportError("ReadBigInt", "invalid big int")
+		return nil
+	}
+	return ret
+}
+
+func (iter *Iterator) ReadFloat32() (ret float32) {
+	c := iter.nextToken()
+	if c == '-' {
+		return -iter.readPositiveFloat32()
+	} else {
+		iter.unreadByte()
+		return iter.readPositiveFloat32()
+	}
+}
+
+func (iter *Iterator) readPositiveFloat32() (ret float32) {
+	value := uint64(0)
+	c := byte(' ')
+	i := iter.head
+non_decimal_loop:
+	for ; i < iter.tail; i++ {
+		c = iter.buf[i]
+		ind := floatDigits[c]
+		switch ind {
+		case invalidCharForNumber:
+			return iter.readFloat32SlowPath()
+		case endOfNumber:
+			iter.head = i
+			return float32(value)
+		case dotInNumber:
+			break non_decimal_loop
+		}
+		if value > uint64SafeToMultiple10 {
+			return iter.readFloat32SlowPath()
+		}
+		value = (value << 3) + (value << 1) + uint64(ind) // value = value * 10 + ind;
+	}
+	if c == '.' {
+		i++
+		decimalPlaces := 0
+		for ; i < iter.tail; i++ {
+			c = iter.buf[i]
+			ind := floatDigits[c]
+			switch ind {
+			case endOfNumber:
+				if decimalPlaces > 0 && decimalPlaces < len(_POW10) {
+					iter.head = i
+					return float32(float64(value) / float64(_POW10[decimalPlaces]))
+				}
+				// too many decimal places
+				return iter.readFloat32SlowPath()
+			case invalidCharForNumber:
+				fallthrough
+			case dotInNumber:
+				return iter.readFloat32SlowPath()
+			}
+			decimalPlaces++
+			if value > uint64SafeToMultiple10 {
+				return iter.readFloat32SlowPath()
+			}
+			value = (value << 3) + (value << 1) + uint64(ind)
+		}
+	}
+	return iter.readFloat32SlowPath()
+}
+
+func (iter *Iterator) readNumberAsString() (ret string) {
+	strBuf := [16]byte{}
+	str := strBuf[0:0]
+load_loop:
+	for {
+		for i := iter.head; i < iter.tail; i++ {
+			c := iter.buf[i]
+			switch c {
+			case '-', '.', 'e', 'E', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
+				str = append(str, c)
+				continue
+			default:
+				iter.head = i
+				break load_loop
+			}
+		}
+		if !iter.loadMore() {
+			break
+		}
+	}
+	if iter.Error != nil && iter.Error != io.EOF {
+		return
+	}
+	if len(str) == 0 {
+		iter.reportError("readNumberAsString", "invalid number")
+	}
+	return *(*string)(unsafe.Pointer(&str))
+}
+
+func (iter *Iterator) readFloat32SlowPath() (ret float32) {
+	str := iter.readNumberAsString()
+	if iter.Error != nil && iter.Error != io.EOF {
+		return
+	}
+	val, err := strconv.ParseFloat(str, 32)
+	if err != nil {
+		iter.Error = err
+		return
+	}
+	return float32(val)
+}
+
+func (iter *Iterator) ReadFloat64() (ret float64) {
+	c := iter.nextToken()
+	if c == '-' {
+		return -iter.readPositiveFloat64()
+	} else {
+		iter.unreadByte()
+		return iter.readPositiveFloat64()
+	}
+}
+
+func (iter *Iterator) readPositiveFloat64() (ret float64) {
+	value := uint64(0)
+	c := byte(' ')
+	i := iter.head
+non_decimal_loop:
+	for ; i < iter.tail; i++ {
+		c = iter.buf[i]
+		ind := floatDigits[c]
+		switch ind {
+		case invalidCharForNumber:
+			return iter.readFloat64SlowPath()
+		case endOfNumber:
+			iter.head = i
+			return float64(value)
+		case dotInNumber:
+			break non_decimal_loop
+		}
+		if value > uint64SafeToMultiple10 {
+			return iter.readFloat64SlowPath()
+		}
+		value = (value << 3) + (value << 1) + uint64(ind) // value = value * 10 + ind;
+	}
+	if c == '.' {
+		i++
+		decimalPlaces := 0
+		for ; i < iter.tail; i++ {
+			c = iter.buf[i]
+			ind := floatDigits[c]
+			switch ind {
+			case endOfNumber:
+				if decimalPlaces > 0 && decimalPlaces < len(_POW10) {
+					iter.head = i
+					return float64(value) / float64(_POW10[decimalPlaces])
+				}
+				// too many decimal places
+				return iter.readFloat64SlowPath()
+			case invalidCharForNumber:
+				fallthrough
+			case dotInNumber:
+				return iter.readFloat64SlowPath()
+			}
+			decimalPlaces++
+			if value > uint64SafeToMultiple10 {
+				return iter.readFloat64SlowPath()
+			}
+			value = (value << 3) + (value << 1) + uint64(ind)
+		}
+	}
+	return iter.readFloat64SlowPath()
+}
+
+func (iter *Iterator) readFloat64SlowPath() (ret float64) {
+	str := iter.readNumberAsString()
+	if iter.Error != nil && iter.Error != io.EOF {
+		return
+	}
+	val, err := strconv.ParseFloat(str, 64)
+	if err != nil {
+		iter.Error = err
+		return
+	}
+	return val
+}

feature_iter_int.go

@@ -0,0 +1,259 @@
+package jsoniter
+
+import (
+	"strconv"
+)
+
+var intDigits []int8
+
+const uint32SafeToMultiply10 = uint32(0xffffffff)/10 - 1
+const uint64SafeToMultiple10 = uint64(0xffffffffffffffff)/10 - 1
+const int64Max = uint64(0x7fffffffffffffff)
+const int32Max = uint32(0x7fffffff)
+const int16Max = uint32(0x7fff)
+const uint16Max = uint32(0xffff)
+const int8Max = uint32(0x7fff)
+const uint8Max = uint32(0xffff)
+
+func init() {
+	intDigits = make([]int8, 256)
+	for i := 0; i < len(intDigits); i++ {
+		intDigits[i] = invalidCharForNumber
+	}
+	for i := int8('0'); i <= int8('9'); i++ {
+		intDigits[i] = i - int8('0')
+	}
+}
+
+func (iter *Iterator) ReadUint() uint {
+	return uint(iter.ReadUint64())
+}
+
+func (iter *Iterator) ReadInt() int {
+	return int(iter.ReadInt64())
+}
+
+func (iter *Iterator) ReadInt8() (ret int8) {
+	c := iter.nextToken()
+	if c == '-' {
+		val := iter.readUint32(iter.readByte())
+		if val > int8Max+1 {
+			iter.reportError("ReadInt8", "overflow: "+strconv.FormatInt(int64(val), 10))
+			return
+		}
+		return -int8(val)
+	} else {
+		val := iter.readUint32(c)
+		if val > int8Max {
+			iter.reportError("ReadInt8", "overflow: "+strconv.FormatInt(int64(val), 10))
+			return
+		}
+		return int8(val)
+	}
+}
+
+func (iter *Iterator) ReadUint8() (ret uint8) {
+	val := iter.readUint32(iter.nextToken())
+	if val > uint8Max {
+		iter.reportError("ReadUint8", "overflow: "+strconv.FormatInt(int64(val), 10))
+		return
+	}
+	return uint8(val)
+}
+
+func (iter *Iterator) ReadInt16() (ret int16) {
+	c := iter.nextToken()
+	if c == '-' {
+		val := iter.readUint32(iter.readByte())
+		if val > int16Max+1 {
+			iter.reportError("ReadInt16", "overflow: "+strconv.FormatInt(int64(val), 10))
+			return
+		}
+		return -int16(val)
+	} else {
+		val := iter.readUint32(c)
+		if val > int16Max {
+			iter.reportError("ReadInt16", "overflow: "+strconv.FormatInt(int64(val), 10))
+			return
+		}
+		return int16(val)
+	}
+}
+
+func (iter *Iterator) ReadUint16() (ret uint16) {
+	val := iter.readUint32(iter.nextToken())
+	if val > uint16Max {
+		iter.reportError("ReadUint16", "overflow: "+strconv.FormatInt(int64(val), 10))
+		return
+	}
+	return uint16(val)
+}
+
+func (iter *Iterator) ReadInt32() (ret int32) {
+	c := iter.nextToken()
+	if c == '-' {
+		val := iter.readUint32(iter.readByte())
+		if val > int32Max+1 {
+			iter.reportError("ReadInt32", "overflow: "+strconv.FormatInt(int64(val), 10))
+			return
+		}
+		return -int32(val)
+	} else {
+		val := iter.readUint32(c)
+		if val > int32Max {
+			iter.reportError("ReadInt32", "overflow: "+strconv.FormatInt(int64(val), 10))
+			return
+		}
+		return int32(val)
+	}
+}
+
+func (iter *Iterator) ReadUint32() (ret uint32) {
+	return iter.readUint32(iter.nextToken())
+}
+
+func (iter *Iterator) readUint32(c byte) (ret uint32) {
+	ind := intDigits[c]
+	if ind == 0 {
+		return 0 // single zero
+	}
+	if ind == invalidCharForNumber {
+		iter.reportError("readUint32", "unexpected character: "+string([]byte{byte(ind)}))
+		return
+	}
+	value := uint32(ind)
+	if iter.tail-iter.head > 10 {
+		i := iter.head
+		ind2 := intDigits[iter.buf[i]]
+		if ind2 == invalidCharForNumber {
+			iter.head = i
+			return value
+		}
+		i++
+		ind3 := intDigits[iter.buf[i]]
+		if ind3 == invalidCharForNumber {
+			iter.head = i
+			return value*10 + uint32(ind2)
+		}
+		//iter.head = i + 1
+		//value = value * 100 + uint32(ind2) * 10 + uint32(ind3)
+		i++
+		ind4 := intDigits[iter.buf[i]]
+		if ind4 == invalidCharForNumber {
+			iter.head = i
+			return value*100 + uint32(ind2)*10 + uint32(ind3)
+		}
+		i++
+		ind5 := intDigits[iter.buf[i]]
+		if ind5 == invalidCharForNumber {
+			iter.head = i
+			return value*1000 + uint32(ind2)*100 + uint32(ind3)*10 + uint32(ind4)
+		}
+		i++
+		ind6 := intDigits[iter.buf[i]]
+		if ind6 == invalidCharForNumber {
+			iter.head = i
+			return value*10000 + uint32(ind2)*1000 + uint32(ind3)*100 + uint32(ind4)*10 + uint32(ind5)
+		}
+		i++
+		ind7 := intDigits[iter.buf[i]]
+		if ind7 == invalidCharForNumber {
+			iter.head = i
+			return value*100000 + uint32(ind2)*10000 + uint32(ind3)*1000 + uint32(ind4)*100 + uint32(ind5)*10 + uint32(ind6)
+		}
+		i++
+		ind8 := intDigits[iter.buf[i]]
+		if ind8 == invalidCharForNumber {
+			iter.head = i
+			return value*1000000 + uint32(ind2)*100000 + uint32(ind3)*10000 + uint32(ind4)*1000 + uint32(ind5)*100 + uint32(ind6)*10 + uint32(ind7)
+		}
+		i++
+		ind9 := intDigits[iter.buf[i]]
+		value = value*10000000 + uint32(ind2)*1000000 + uint32(ind3)*100000 + uint32(ind4)*10000 + uint32(ind5)*1000 + uint32(ind6)*100 + uint32(ind7)*10 + uint32(ind8)
+		iter.head = i
+		if ind9 == invalidCharForNumber {
+			return value
+		}
+	}
+	for {
+		for i := iter.head; i < iter.tail; i++ {
+			ind = intDigits[iter.buf[i]]
+			if ind == invalidCharForNumber {
+				iter.head = i
+				return value
+			}
+			if value > uint32SafeToMultiply10 {
+				value2 := (value << 3) + (value << 1) + uint32(ind)
+				if value2 < value {
+					iter.reportError("readUint32", "overflow")
+					return
+				} else {
+					value = value2
+					continue
+				}
+			}
+			value = (value << 3) + (value << 1) + uint32(ind)
+		}
+		if !iter.loadMore() {
+			return value
+		}
+	}
+}
+
+func (iter *Iterator) ReadInt64() (ret int64) {
+	c := iter.nextToken()
+	if c == '-' {
+		val := iter.readUint64(iter.readByte())
+		if val > int64Max+1 {
+			iter.reportError("ReadInt64", "overflow: "+strconv.FormatUint(uint64(val), 10))
+			return
+		}
+		return -int64(val)
+	} else {
+		val := iter.readUint64(c)
+		if val > int64Max {
+			iter.reportError("ReadInt64", "overflow: "+strconv.FormatUint(uint64(val), 10))
+			return
+		}
+		return int64(val)
+	}
+}
+
+func (iter *Iterator) ReadUint64() uint64 {
+	return iter.readUint64(iter.nextToken())
+}
+
+func (iter *Iterator) readUint64(c byte) (ret uint64) {
+	ind := intDigits[c]
+	if ind == 0 {
+		return 0 // single zero
+	}
+	if ind == invalidCharForNumber {
+		iter.reportError("readUint64", "unexpected character: "+string([]byte{byte(ind)}))
+		return
+	}
+	value := uint64(ind)
+	for {
+		for i := iter.head; i < iter.tail; i++ {
+			ind = intDigits[iter.buf[i]]
+			if ind == invalidCharForNumber {
+				iter.head = i
+				return value
+			}
+			if value > uint64SafeToMultiple10 {
+				value2 := (value << 3) + (value << 1) + uint64(ind)
+				if value2 < value {
+					iter.reportError("readUint64", "overflow")
+					return
+				} else {
+					value = value2
+					continue
+				}
+			}
+			value = (value << 3) + (value << 1) + uint64(ind)
+		}
+		if !iter.loadMore() {
+			return value
+		}
+	}
+}

feature_iter_object.go

@@ -0,0 +1,194 @@
+package jsoniter
+
+import (
+	"fmt"
+	"unicode"
+)
+
+func (iter *Iterator) ReadObject() (ret string) {
+	c := iter.nextToken()
+	switch c {
+	case 'n':
+		iter.skipFixedBytes(3)
+		return "" // null
+	case '{':
+		c = iter.nextToken()
+		if c == '"' {
+			iter.unreadByte()
+			return string(iter.readObjectFieldAsBytes())
+		}
+		if c == '}' {
+			return "" // end of object
+		}
+		iter.reportError("ReadObject", `expect " after {`)
+		return
+	case ',':
+		return string(iter.readObjectFieldAsBytes())
+	case '}':
+		return "" // end of object
+	default:
+		iter.reportError("ReadObject", fmt.Sprintf(`expect { or , or } or n, but found %s`, string([]byte{c})))
+		return
+	}
+}
+
+func (iter *Iterator) readFieldHash() int32 {
+	hash := int64(0x811c9dc5)
+	c := iter.nextToken()
+	if c == '"' {
+		for {
+			for i := iter.head; i < iter.tail; i++ {
+				// require ascii string and no escape
+				b := iter.buf[i]
+				if 'A' <= b && b <= 'Z' {
+					b += 'a' - 'A'
+				}
+				if b == '"' {
+					iter.head = i + 1
+					c = iter.nextToken()
+					if c != ':' {
+						iter.reportError("readFieldHash", `expect :, but found `+string([]byte{c}))
+					}
+					return int32(hash)
+				}
+				hash ^= int64(b)
+				hash *= 0x1000193
+			}
+			if !iter.loadMore() {
+				iter.reportError("readFieldHash", `incomplete field name`)
+				return 0
+			}
+		}
+	}
+	iter.reportError("readFieldHash", `expect ", but found `+string([]byte{c}))
+	return 0
+}
+
+func calcHash(str string) int32 {
+	hash := int64(0x811c9dc5)
+	for _, b := range str {
+		hash ^= int64(unicode.ToLower(b))
+		hash *= 0x1000193
+	}
+	return int32(hash)
+}
+
+func (iter *Iterator) ReadObjectCB(callback func(*Iterator, string) bool) bool {
+	c := iter.nextToken()
+	if c == '{' {
+		c = iter.nextToken()
+		if c == '"' {
+			iter.unreadByte()
+			field := string(iter.readObjectFieldAsBytes())
+			if !callback(iter, field) {
+				return false
+			}
+			for iter.nextToken() == ',' {
+				field = string(iter.readObjectFieldAsBytes())
+				if !callback(iter, field) {
+					return false
+				}
+			}
+			return true
+		}
+		if c == '}' {
+			return true
+		}
+		iter.reportError("ReadObjectCB", `expect " after }`)
+		return false
+	}
+	if c == 'n' {
+		iter.skipFixedBytes(3)
+		return true // null
+	}
+	iter.reportError("ReadObjectCB", `expect { or n`)
+	return false
+}
+
+func (iter *Iterator) ReadMapCB(callback func(*Iterator, string) bool) bool {
+	c := iter.nextToken()
+	if c == '{' {
+		c = iter.nextToken()
+		if c == '"' {
+			iter.unreadByte()
+			field := iter.ReadString()
+			if iter.nextToken() != ':' {
+				iter.reportError("ReadMapCB", "expect : after object field")
+				return false
+			}
+			if !callback(iter, field) {
+				return false
+			}
+			for iter.nextToken() == ',' {
+				field = iter.ReadString()
+				if iter.nextToken() != ':' {
+					iter.reportError("ReadMapCB", "expect : after object field")
+					return false
+				}
+				if !callback(iter, field) {
+					return false
+				}
+			}
+			return true
+		}
+		if c == '}' {
+			return true
+		}
+		iter.reportError("ReadMapCB", `expect " after }`)
+		return false
+	}
+	if c == 'n' {
+		iter.skipFixedBytes(3)
+		return true // null
+	}
+	iter.reportError("ReadMapCB", `expect { or n`)
+	return false
+}
+
+func (iter *Iterator) readObjectStart() bool {
+	c := iter.nextToken()
+	if c == '{' {
+		c = iter.nextToken()
+		if c == '}' {
+			return false
+		}
+		iter.unreadByte()
+		return true
+	} else if c == 'n' {
+		iter.skipFixedBytes(3)
+		return false
+	}
+	iter.reportError("readObjectStart", "expect { or n")
+	return false
+}
+
+func (iter *Iterator) readObjectFieldAsBytes() (ret []byte) {
+	str := iter.ReadStringAsSlice()
+	if iter.skipWhitespacesWithoutLoadMore() {
+		if ret == nil {
+			ret = make([]byte, len(str))
+			copy(ret, str)
+		}
+		if !iter.loadMore() {
+			return
+		}
+	}
+	if iter.buf[iter.head] != ':' {
+		iter.reportError("readObjectFieldAsBytes", "expect : after object field")
+		return
+	}
+	iter.head++
+	if iter.skipWhitespacesWithoutLoadMore() {
+		if ret == nil {
+			ret = make([]byte, len(str))
+			copy(ret, str)
+		}
+		if !iter.loadMore() {
+			return
+		}
+	}
+	if ret == nil {
+		return str
+	}
+	return ret
+}

feature_iter_skip.go

@@ -0,0 +1,216 @@
+package jsoniter
+
+import "fmt"
+
+// ReadNil reads a json object as nil and
+// returns whether it's a nil or not
+func (iter *Iterator) ReadNil() (ret bool) {
+	c := iter.nextToken()
+	if c == 'n' {
+		iter.skipFixedBytes(3) // null
+		return true
+	}
+	iter.unreadByte()
+	return false
+}
+
+// ReadBool reads a json object as Bool
+func (iter *Iterator) ReadBool() (ret bool) {
+	c := iter.nextToken()
+	if c == 't' {
+		iter.skipFixedBytes(3)
+		return true
+	}
+	if c == 'f' {
+		iter.skipFixedBytes(4)
+		return false
+	}
+	iter.reportError("ReadBool", "expect t or f")
+	return
+}
+
+func (iter *Iterator) SkipAndReturnBytes() []byte {
+	if iter.reader != nil {
+		panic("reader input does not support this api")
+	}
+	before := iter.head
+	iter.Skip()
+	after := iter.head
+	return iter.buf[before:after]
+}
+
+// Skip skips a json object and positions to relatively the next json object
+func (iter *Iterator) Skip() {
+	c := iter.nextToken()
+	switch c {
+	case '"':
+		iter.skipString()
+	case 'n', 't':
+		iter.skipFixedBytes(3) // null or true
+	case 'f':
+		iter.skipFixedBytes(4) // false
+	case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
+		iter.skipUntilBreak()
+	case '[':
+		iter.skipArray()
+	case '{':
+		iter.skipObject()
+	default:
+		iter.reportError("Skip", fmt.Sprintf("do not know how to skip: %v", c))
+		return
+	}
+}
+
+func (iter *Iterator) skipString() {
+	for {
+		end, escaped := iter.findStringEnd()
+		if end == -1 {
+			if !iter.loadMore() {
+				iter.reportError("skipString", "incomplete string")
+				return
+			}
+			if escaped {
+				iter.head = 1 // skip the first char as last char read is \
+			}
+		} else {
+			iter.head = end
+			return
+		}
+	}
+}
+
+// adapted from: https://github.com/buger/jsonparser/blob/master/parser.go
+// Tries to find the end of string
+// Support if string contains escaped quote symbols.
+func (iter *Iterator) findStringEnd() (int, bool) {
+	escaped := false
+	for i := iter.head; i < iter.tail; i++ {
+		c := iter.buf[i]
+		if c == '"' {
+			if !escaped {
+				return i + 1, false
+			}
+			j := i - 1
+			for {
+				if j < iter.head || iter.buf[j] != '\\' {
+					// even number of backslashes
+					// either end of buffer, or " found
+					return i + 1, true
+				}
+				j--
+				if j < iter.head || iter.buf[j] != '\\' {
+					// odd number of backslashes
+					// it is \" or \\\"
+					break
+				}
+				j--
+			}
+		} else if c == '\\' {
+			escaped = true
+		}
+	}
+	j := iter.tail - 1
+	for {
+		if j < iter.head || iter.buf[j] != '\\' {
+			// even number of backslashes
+			// either end of buffer, or " found
+			return -1, false // do not end with \
+		}
+		j--
+		if j < iter.head || iter.buf[j] != '\\' {
+			// odd number of backslashes
+			// it is \" or \\\"
+			break
+		}
+		j--
+
+	}
+	return -1, true // end with \
+}
+
+func (iter *Iterator) skipArray() {
+	level := 1
+	for {
+		for i := iter.head; i < iter.tail; i++ {
+			switch iter.buf[i] {
+			case '"': // If inside string, skip it
+				iter.head = i + 1
+				iter.skipString()
+				i = iter.head - 1 // it will be i++ soon
+			case '[': // If open symbol, increase level
+				level++
+			case ']': // If close symbol, increase level
+				level--
+
+				// If we have returned to the original level, we're done
+				if level == 0 {
+					iter.head = i + 1
+					return
+				}
+			}
+		}
+		if !iter.loadMore() {
+			iter.reportError("skipObject", "incomplete array")
+			return
+		}
+	}
+}
+
+func (iter *Iterator) skipObject() {
+	level := 1
+	for {
+		for i := iter.head; i < iter.tail; i++ {
+			switch iter.buf[i] {
+			case '"': // If inside string, skip it
+				iter.head = i + 1
+				iter.skipString()
+				i = iter.head - 1 // it will be i++ soon
+			case '{': // If open symbol, increase level
+				level++
+			case '}': // If close symbol, increase level
+				level--
+
+				// If we have returned to the original level, we're done
+				if level == 0 {
+					iter.head = i + 1
+					return
+				}
+			}
+		}
+		if !iter.loadMore() {
+			iter.reportError("skipObject", "incomplete object")
+			return
+		}
+	}
+}
+
+func (iter *Iterator) skipUntilBreak() {
+	// true, false, null, number
+	for {
+		for i := iter.head; i < iter.tail; i++ {
+			c := iter.buf[i]
+			switch c {
+			case ' ', '\n', '\r', '\t', ',', '}', ']':
+				iter.head = i
+				return
+			}
+		}
+		if !iter.loadMore() {
+			return
+		}
+	}
+}
+
+func (iter *Iterator) skipFixedBytes(n int) {
+	iter.head += n
+	if iter.head >= iter.tail {
+		more := iter.head - iter.tail
+		if !iter.loadMore() {
+			if more > 0 {
+				iter.reportError("skipFixedBytes", "unexpected end")
+			}
+			return
+		}
+		iter.head += more
+	}
+}

feature_iter_string.go

@@ -0,0 +1,198 @@
+package jsoniter
+
+import (
+	"unicode/utf16"
+)
+
+func (iter *Iterator) ReadString() (ret string) {
+	c := iter.nextToken()
+	if c == '"' {
+		for i := iter.head; i < iter.tail; i++ {
+			c := iter.buf[i]
+			if c == '"' {
+				ret = string(iter.buf[iter.head:i])
+				iter.head = i + 1
+				return ret
+			} else if c == '\\' {
+				break
+			}
+		}
+		return iter.readStringSlowPath()
+	} else if c == 'n' {
+		iter.skipFixedBytes(3)
+		return ""
+	}
+	iter.reportError("ReadString", `expects " or n`)
+	return
+}
+
+func (iter *Iterator) readStringSlowPath() (ret string) {
+	var str []byte
+	var c byte
+	for iter.Error == nil {
+		c = iter.readByte()
+		if c == '"' {
+			return string(str)
+		}
+		if c == '\\' {
+			c = iter.readByte()
+			switch c {
+			case 'u', 'U':
+				r := iter.readU4()
+				if utf16.IsSurrogate(r) {
+					c = iter.readByte()
+					if iter.Error != nil {
+						return
+					}
+					if c != '\\' {
+						iter.reportError("ReadString",
+							`expects \u after utf16 surrogate, but \ not found`)
+						return
+					}
+					c = iter.readByte()
+					if iter.Error != nil {
+						return
+					}
+					if c != 'u' && c != 'U' {
+						iter.reportError("ReadString",
+							`expects \u after utf16 surrogate, but \u not found`)
+						return
+					}
+					r2 := iter.readU4()
+					if iter.Error != nil {
+						return
+					}
+					combined := utf16.DecodeRune(r, r2)
+					str = appendRune(str, combined)
+				} else {
+					str = appendRune(str, r)
+				}
+			case '"':
+				str = append(str, '"')
+			case '\\':
+				str = append(str, '\\')
+			case '/':
+				str = append(str, '/')
+			case 'b':
+				str = append(str, '\b')
+			case 'f':
+				str = append(str, '\f')
+			case 'n':
+				str = append(str, '\n')
+			case 'r':
+				str = append(str, '\r')
+			case 't':
+				str = append(str, '\t')
+			default:
+				iter.reportError("ReadString",
+					`invalid escape char after \`)
+				return
+			}
+		} else {
+			str = append(str, c)
+		}
+	}
+	iter.reportError("ReadString", "unexpected end of input")
+	return
+}
+
+func (iter *Iterator) ReadStringAsSlice() (ret []byte) {
+	c := iter.nextToken()
+	if c == '"' {
+		for i := iter.head; i < iter.tail; i++ {
+			// require ascii string and no escape
+			// for: field name, base64, number
+			if iter.buf[i] == '"' {
+				// fast path: reuse the underlying buffer
+				ret = iter.buf[iter.head:i]
+				iter.head = i + 1
+				return ret
+			}
+		}
+		readLen := iter.tail - iter.head
+		copied := make([]byte, readLen, readLen*2)
+		copy(copied, iter.buf[iter.head:iter.tail])
+		iter.head = iter.tail
+		for iter.Error == nil {
+			c := iter.readByte()
+			if c == '"' {
+				return copied
+			}
+			copied = append(copied, c)
+		}
+		return copied
+	}
+	iter.reportError("ReadString", `expects " or n`)
+	return
+}
+
+func (iter *Iterator) readU4() (ret rune) {
+	for i := 0; i < 4; i++ {
+		c := iter.readByte()
+		if iter.Error != nil {
+			return
+		}
+		if c >= '0' && c <= '9' {
+			ret = ret*16 + rune(c-'0')
+		} else if c >= 'a' && c <= 'f' {
+			ret = ret*16 + rune(c-'a'+10)
+		} else if c >= 'A' && c <= 'F' {
+			ret = ret*16 + rune(c-'A'+10)
+		} else {
+			iter.reportError("readU4", "expects 0~9 or a~f")
+			return
+		}
+	}
+	return ret
+}
+
+const (
+	t1 = 0x00 // 0000 0000
+	tx = 0x80 // 1000 0000
+	t2 = 0xC0 // 1100 0000
+	t3 = 0xE0 // 1110 0000
+	t4 = 0xF0 // 1111 0000
+	t5 = 0xF8 // 1111 1000
+
+	maskx = 0x3F // 0011 1111
+	mask2 = 0x1F // 0001 1111
+	mask3 = 0x0F // 0000 1111
+	mask4 = 0x07 // 0000 0111
+
+	rune1Max = 1<<7 - 1
+	rune2Max = 1<<11 - 1
+	rune3Max = 1<<16 - 1
+
+	surrogateMin = 0xD800
+	surrogateMax = 0xDFFF
+
+	maxRune   = '\U0010FFFF' // Maximum valid Unicode code point.
+	runeError = '\uFFFD'     // the "error" Rune or "Unicode replacement character"
+)
+
+func appendRune(p []byte, r rune) []byte {
+	// Negative values are erroneous. Making it unsigned addresses the problem.
+	switch i := uint32(r); {
+	case i <= rune1Max:
+		p = append(p, byte(r))
+		return p
+	case i <= rune2Max:
+		p = append(p, t2|byte(r>>6))
+		p = append(p, tx|byte(r)&maskx)
+		return p
+	case i > maxRune, surrogateMin <= i && i <= surrogateMax:
+		r = runeError
+		fallthrough
+	case i <= rune3Max:
+		p = append(p, t3|byte(r>>12))
+		p = append(p, tx|byte(r>>6)&maskx)
+		p = append(p, tx|byte(r)&maskx)
+		return p
+	default:
+		p = append(p, t4|byte(r>>18))
+		p = append(p, tx|byte(r>>12)&maskx)
+		p = append(p, tx|byte(r>>6)&maskx)
+		p = append(p, tx|byte(r)&maskx)
+		return p
+	}
+}

feature_reflect.go

@@ -0,0 +1,495 @@
+package jsoniter
+
+import (
+	"encoding"
+	"encoding/json"
+	"fmt"
+	"reflect"
+	"unsafe"
+)
+
+// Decoder is an internal type registered to cache as needed.
+// Don't confuse jsoniter.Decoder with json.Decoder.
+// For json.Decoder's adapter, refer to jsoniter.AdapterDecoder(todo link).
+//
+// Reflection on type to create decoders, which is then cached
+// Reflection on value is avoided as we can, as the reflect.Value itself will allocate, with following exceptions
+// 1. create instance of new value, for example *int will need a int to be allocated
+// 2. append to slice, if the existing cap is not enough, allocate will be done using Reflect.New
+// 3. assignment to map, both key and value will be reflect.Value
+// For a simple struct binding, it will be reflect.Value free and allocation free
+type Decoder interface {
+	decode(ptr unsafe.Pointer, iter *Iterator)
+}
+
+// Encoder is an internal type registered to cache as needed.
+// Don't confuse jsoniter.Encoder with json.Encoder.
+// For json.Encoder's adapter, refer to jsoniter.AdapterEncoder(todo godoc link).
+type Encoder interface {
+	isEmpty(ptr unsafe.Pointer) bool
+	encode(ptr unsafe.Pointer, stream *Stream)
+	encodeInterface(val interface{}, stream *Stream)
+}
+
+func writeToStream(val interface{}, stream *Stream, encoder Encoder) {
+	e := (*emptyInterface)(unsafe.Pointer(&val))
+	if e.word == nil {
+		stream.WriteNil()
+		return
+	}
+	if reflect.TypeOf(val).Kind() == reflect.Ptr {
+		encoder.encode(unsafe.Pointer(&e.word), stream)
+	} else {
+		encoder.encode(e.word, stream)
+	}
+}
+
+type DecoderFunc func(ptr unsafe.Pointer, iter *Iterator)
+type EncoderFunc func(ptr unsafe.Pointer, stream *Stream)
+type ExtensionFunc func(typ reflect.Type, field *reflect.StructField) ([]string, EncoderFunc, DecoderFunc)
+
+type funcDecoder struct {
+	fun DecoderFunc
+}
+
+func (decoder *funcDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
+	decoder.fun(ptr, iter)
+}
+
+type funcEncoder struct {
+	fun EncoderFunc
+}
+
+func (encoder *funcEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
+	encoder.fun(ptr, stream)
+}
+
+func (encoder *funcEncoder) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (encoder *funcEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	return false
+}
+
+var typeDecoders map[string]Decoder
+var fieldDecoders map[string]Decoder
+var typeEncoders map[string]Encoder
+var fieldEncoders map[string]Encoder
+var extensions []ExtensionFunc
+var jsonNumberType reflect.Type
+var jsonRawMessageType reflect.Type
+var anyType reflect.Type
+var marshalerType reflect.Type
+var unmarshalerType reflect.Type
+var textUnmarshalerType reflect.Type
+
+func init() {
+	typeDecoders = map[string]Decoder{}
+	fieldDecoders = map[string]Decoder{}
+	typeEncoders = map[string]Encoder{}
+	fieldEncoders = map[string]Encoder{}
+	extensions = []ExtensionFunc{}
+	jsonNumberType = reflect.TypeOf((*json.Number)(nil)).Elem()
+	jsonRawMessageType = reflect.TypeOf((*json.RawMessage)(nil)).Elem()
+	anyType = reflect.TypeOf((*Any)(nil)).Elem()
+	marshalerType = reflect.TypeOf((*json.Marshaler)(nil)).Elem()
+	unmarshalerType = reflect.TypeOf((*json.Unmarshaler)(nil)).Elem()
+	textUnmarshalerType = reflect.TypeOf((*encoding.TextUnmarshaler)(nil)).Elem()
+}
+
+// RegisterTypeDecoder can register a type for json object
+func RegisterTypeDecoder(typ string, fun DecoderFunc) {
+	typeDecoders[typ] = &funcDecoder{fun}
+}
+
+// RegisterFieldDecoder can register a type for json field
+func RegisterFieldDecoder(typ string, field string, fun DecoderFunc) {
+	fieldDecoders[fmt.Sprintf("%s/%s", typ, field)] = &funcDecoder{fun}
+}
+
+func RegisterTypeEncoder(typ string, fun EncoderFunc) {
+	typeEncoders[typ] = &funcEncoder{fun}
+}
+
+func RegisterFieldEncoder(typ string, field string, fun EncoderFunc) {
+	fieldEncoders[fmt.Sprintf("%s/%s", typ, field)] = &funcEncoder{fun}
+}
+
+// RegisterExtension can register a custom extension
+func RegisterExtension(extension ExtensionFunc) {
+	extensions = append(extensions, extension)
+}
+
+type optionalDecoder struct {
+	valueType    reflect.Type
+	valueDecoder Decoder
+}
+
+func (decoder *optionalDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
+	if iter.ReadNil() {
+		*((*unsafe.Pointer)(ptr)) = nil
+	} else {
+		if *((*unsafe.Pointer)(ptr)) == nil {
+			// pointer to null, we have to allocate memory to hold the value
+			value := reflect.New(decoder.valueType)
+			decoder.valueDecoder.decode(unsafe.Pointer(value.Pointer()), iter)
+			*((*uintptr)(ptr)) = value.Pointer()
+		} else {
+			// reuse existing instance
+			decoder.valueDecoder.decode(*((*unsafe.Pointer)(ptr)), iter)
+		}
+	}
+}
+
+type optionalEncoder struct {
+	valueEncoder Encoder
+}
+
+func (encoder *optionalEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
+	if *((*unsafe.Pointer)(ptr)) == nil {
+		stream.WriteNil()
+	} else {
+		encoder.valueEncoder.encode(*((*unsafe.Pointer)(ptr)), stream)
+	}
+}
+
+func (encoder *optionalEncoder) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (encoder *optionalEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	if *((*unsafe.Pointer)(ptr)) == nil {
+		return true
+	} else {
+		return encoder.valueEncoder.isEmpty(*((*unsafe.Pointer)(ptr)))
+	}
+}
+
+type placeholderEncoder struct {
+	valueEncoder Encoder
+}
+
+func (encoder *placeholderEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
+	encoder.valueEncoder.encode(ptr, stream)
+}
+
+func (encoder *placeholderEncoder) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (encoder *placeholderEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	return encoder.valueEncoder.isEmpty(ptr)
+}
+
+type placeholderDecoder struct {
+	valueDecoder Decoder
+}
+
+func (decoder *placeholderDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
+	decoder.valueDecoder.decode(ptr, iter)
+}
+
+// emptyInterface is the header for an interface{} value.
+type emptyInterface struct {
+	typ  unsafe.Pointer
+	word unsafe.Pointer
+}
+
+// emptyInterface is the header for an interface with method (not interface{})
+type nonEmptyInterface struct {
+	// see ../runtime/iface.go:/Itab
+	itab *struct {
+		ityp   unsafe.Pointer // static interface type
+		typ    unsafe.Pointer // dynamic concrete type
+		link   unsafe.Pointer
+		bad    int32
+		unused int32
+		fun    [100000]unsafe.Pointer // method table
+	}
+	word unsafe.Pointer
+}
+
+// Read converts an Iterator instance into go interface, same as json.Unmarshal
+func (iter *Iterator) ReadVal(obj interface{}) {
+	typ := reflect.TypeOf(obj)
+	cacheKey := typ.Elem()
+	cachedDecoder := iter.cfg.getDecoderFromCache(cacheKey)
+	if cachedDecoder == nil {
+		decoder, err := decoderOfType(iter.cfg, cacheKey)
+		if err != nil {
+			iter.Error = err
+			return
+		}
+		cachedDecoder = decoder
+		iter.cfg.addDecoderToCache(cacheKey, decoder)
+	}
+	e := (*emptyInterface)(unsafe.Pointer(&obj))
+	cachedDecoder.decode(e.word, iter)
+}
+
+func (stream *Stream) WriteVal(val interface{}) {
+	if nil == val {
+		stream.WriteNil()
+		return
+	}
+	typ := reflect.TypeOf(val)
+	cacheKey := typ
+	cachedEncoder := stream.cfg.getEncoderFromCache(cacheKey)
+	if cachedEncoder == nil {
+		encoder, err := encoderOfType(stream.cfg, cacheKey)
+		if err != nil {
+			stream.Error = err
+			return
+		}
+		cachedEncoder = encoder
+		stream.cfg.addEncoderToCache(cacheKey, encoder)
+	}
+	cachedEncoder.encodeInterface(val, stream)
+}
+
+type prefix string
+
+func (p prefix) addToDecoder(decoder Decoder, err error) (Decoder, error) {
+	if err != nil {
+		return nil, fmt.Errorf("%s: %s", p, err.Error())
+	}
+	return decoder, err
+}
+
+func (p prefix) addToEncoder(encoder Encoder, err error) (Encoder, error) {
+	if err != nil {
+		return nil, fmt.Errorf("%s: %s", p, err.Error())
+	}
+	return encoder, err
+}
+
+func decoderOfType(cfg *frozenConfig, typ reflect.Type) (Decoder, error) {
+	typeName := typ.String()
+	typeDecoder := typeDecoders[typeName]
+	if typeDecoder != nil {
+		return typeDecoder, nil
+	}
+	if typ.Kind() == reflect.Ptr {
+		typeDecoder := typeDecoders[typ.Elem().String()]
+		if typeDecoder != nil {
+			return &optionalDecoder{typ.Elem(), typeDecoder}, nil
+		}
+	}
+	cacheKey := typ
+	cachedDecoder := cfg.getDecoderFromCache(cacheKey)
+	if cachedDecoder != nil {
+		return cachedDecoder, nil
+	}
+	placeholder := &placeholderDecoder{}
+	cfg.addDecoderToCache(cacheKey, placeholder)
+	newDecoder, err := createDecoderOfType(cfg, typ)
+	placeholder.valueDecoder = newDecoder
+	cfg.addDecoderToCache(cacheKey, newDecoder)
+	return newDecoder, err
+}
+
+func createDecoderOfType(cfg *frozenConfig, typ reflect.Type) (Decoder, error) {
+	if typ.String() == "[]uint8" {
+		return &base64Codec{}, nil
+	}
+	if typ.AssignableTo(jsonRawMessageType) {
+		return &jsonRawMessageCodec{}, nil
+	}
+	if typ.AssignableTo(jsonNumberType) {
+		return &jsonNumberCodec{}, nil
+	}
+	if typ.ConvertibleTo(unmarshalerType) {
+		templateInterface := reflect.New(typ).Elem().Interface()
+		return &optionalDecoder{typ, &unmarshalerDecoder{extractInterface(templateInterface)}}, nil
+	}
+	if typ.ConvertibleTo(anyType) {
+		return &anyCodec{}, nil
+	}
+	switch typ.Kind() {
+	case reflect.String:
+		return &stringCodec{}, nil
+	case reflect.Int:
+		return &intCodec{}, nil
+	case reflect.Int8:
+		return &int8Codec{}, nil
+	case reflect.Int16:
+		return &int16Codec{}, nil
+	case reflect.Int32:
+		return &int32Codec{}, nil
+	case reflect.Int64:
+		return &int64Codec{}, nil
+	case reflect.Uint:
+		return &uintCodec{}, nil
+	case reflect.Uint8:
+		return &uint8Codec{}, nil
+	case reflect.Uint16:
+		return &uint16Codec{}, nil
+	case reflect.Uint32:
+		return &uint32Codec{}, nil
+	case reflect.Uint64:
+		return &uint64Codec{}, nil
+	case reflect.Float32:
+		return &float32Codec{}, nil
+	case reflect.Float64:
+		return &float64Codec{}, nil
+	case reflect.Bool:
+		return &boolCodec{}, nil
+	case reflect.Interface:
+		if typ.NumMethod() == 0 {
+			return &emptyInterfaceCodec{}, nil
+		} else {
+			return &nonEmptyInterfaceCodec{}, nil
+		}
+	case reflect.Struct:
+		return prefix(fmt.Sprintf("[%s]", typ.String())).addToDecoder(decoderOfStruct(cfg, typ))
+	case reflect.Slice:
+		return prefix("[slice]").addToDecoder(decoderOfSlice(cfg, typ))
+	case reflect.Map:
+		return prefix("[map]").addToDecoder(decoderOfMap(cfg, typ))
+	case reflect.Ptr:
+		return prefix("[optional]").addToDecoder(decoderOfOptional(cfg, typ))
+	default:
+		return nil, fmt.Errorf("unsupported type: %v", typ)
+	}
+}
+
+func encoderOfType(cfg *frozenConfig, typ reflect.Type) (Encoder, error) {
+	typeName := typ.String()
+	typeEncoder := typeEncoders[typeName]
+	if typeEncoder != nil {
+		return typeEncoder, nil
+	}
+	if typ.Kind() == reflect.Ptr {
+		typeEncoder := typeEncoders[typ.Elem().String()]
+		if typeEncoder != nil {
+			return &optionalEncoder{typeEncoder}, nil
+		}
+	}
+	cacheKey := typ
+	cachedEncoder := cfg.getEncoderFromCache(cacheKey)
+	if cachedEncoder != nil {
+		return cachedEncoder, nil
+	}
+	placeholder := &placeholderEncoder{}
+	cfg.addEncoderToCache(cacheKey, placeholder)
+	newEncoder, err := createEncoderOfType(cfg, typ)
+	placeholder.valueEncoder = newEncoder
+	cfg.addEncoderToCache(cacheKey, newEncoder)
+	return newEncoder, err
+}
+
+func createEncoderOfType(cfg *frozenConfig, typ reflect.Type) (Encoder, error) {
+	if typ.String() == "[]uint8" {
+		return &base64Codec{}, nil
+	}
+	if typ.AssignableTo(jsonRawMessageType) {
+		return &jsonRawMessageCodec{}, nil
+	}
+	if typ.AssignableTo(jsonNumberType) {
+		return &jsonNumberCodec{}, nil
+	}
+	if typ.ConvertibleTo(marshalerType) {
+		templateInterface := reflect.New(typ).Elem().Interface()
+		return &marshalerEncoder{extractInterface(templateInterface)}, nil
+	}
+	if typ.ConvertibleTo(anyType) {
+		return &anyCodec{}, nil
+	}
+	kind := typ.Kind()
+	switch kind {
+	case reflect.String:
+		return &stringCodec{}, nil
+	case reflect.Int:
+		return &intCodec{}, nil
+	case reflect.Int8:
+		return &int8Codec{}, nil
+	case reflect.Int16:
+		return &int16Codec{}, nil
+	case reflect.Int32:
+		return &int32Codec{}, nil
+	case reflect.Int64:
+		return &int64Codec{}, nil
+	case reflect.Uint:
+		return &uintCodec{}, nil
+	case reflect.Uint8:
+		return &uint8Codec{}, nil
+	case reflect.Uint16:
+		return &uint16Codec{}, nil
+	case reflect.Uint32:
+		return &uint32Codec{}, nil
+	case reflect.Uint64:
+		return &uint64Codec{}, nil
+	case reflect.Float32:
+		return &float32Codec{}, nil
+	case reflect.Float64:
+		return &float64Codec{}, nil
+	case reflect.Bool:
+		return &boolCodec{}, nil
+	case reflect.Interface:
+		if typ.NumMethod() == 0 {
+			return &emptyInterfaceCodec{}, nil
+		} else {
+			return &nonEmptyInterfaceCodec{}, nil
+		}
+	case reflect.Struct:
+		return prefix(fmt.Sprintf("[%s]", typ.String())).addToEncoder(encoderOfStruct(cfg, typ))
+	case reflect.Slice:
+		return prefix("[slice]").addToEncoder(encoderOfSlice(cfg, typ))
+	case reflect.Map:
+		return prefix("[map]").addToEncoder(encoderOfMap(cfg, typ))
+	case reflect.Ptr:
+		return prefix("[optional]").addToEncoder(encoderOfOptional(cfg, typ))
+	default:
+		return nil, fmt.Errorf("unsupported type: %v", typ)
+	}
+}
+
+func decoderOfOptional(cfg *frozenConfig, typ reflect.Type) (Decoder, error) {
+	elemType := typ.Elem()
+	decoder, err := decoderOfType(cfg, elemType)
+	if err != nil {
+		return nil, err
+	}
+	return &optionalDecoder{elemType, decoder}, nil
+}
+
+func encoderOfOptional(cfg *frozenConfig, typ reflect.Type) (Encoder, error) {
+	elemType := typ.Elem()
+	elemEncoder, err := encoderOfType(cfg, elemType)
+	if err != nil {
+		return nil, err
+	}
+	encoder := &optionalEncoder{elemEncoder}
+	if elemType.Kind() == reflect.Map {
+		encoder = &optionalEncoder{encoder}
+	}
+	return encoder, nil
+}
+
+func decoderOfMap(cfg *frozenConfig, typ reflect.Type) (Decoder, error) {
+	decoder, err := decoderOfType(cfg, typ.Elem())
+	if err != nil {
+		return nil, err
+	}
+	mapInterface := reflect.New(typ).Interface()
+	return &mapDecoder{typ, typ.Key(), typ.Elem(), decoder, extractInterface(mapInterface)}, nil
+}
+
+func extractInterface(val interface{}) emptyInterface {
+	return *((*emptyInterface)(unsafe.Pointer(&val)))
+}
+
+func encoderOfMap(cfg *frozenConfig, typ reflect.Type) (Encoder, error) {
+	elemType := typ.Elem()
+	encoder, err := encoderOfType(cfg, elemType)
+	if err != nil {
+		return nil, err
+	}
+	mapInterface := reflect.New(typ).Elem().Interface()
+	if cfg.sortMapKeys {
+		return &sortKeysMapEncoder{typ, elemType, encoder, *((*emptyInterface)(unsafe.Pointer(&mapInterface)))}, nil
+	} else {
+		return &mapEncoder{typ, elemType, encoder, *((*emptyInterface)(unsafe.Pointer(&mapInterface)))}, nil
+	}
+}

feature_reflect_array.go

@@ -0,0 +1,162 @@
+package jsoniter
+
+import (
+	"fmt"
+	"io"
+	"reflect"
+	"unsafe"
+)
+
+func decoderOfSlice(cfg *frozenConfig, typ reflect.Type) (Decoder, error) {
+	decoder, err := decoderOfType(cfg, typ.Elem())
+	if err != nil {
+		return nil, err
+	}
+	return &sliceDecoder{typ, typ.Elem(), decoder}, nil
+}
+
+func encoderOfSlice(cfg *frozenConfig, typ reflect.Type) (Encoder, error) {
+	encoder, err := encoderOfType(cfg, typ.Elem())
+	if err != nil {
+		return nil, err
+	}
+	if typ.Elem().Kind() == reflect.Map {
+		encoder = &optionalEncoder{encoder}
+	}
+	return &sliceEncoder{typ, typ.Elem(), encoder}, nil
+}
+
+type sliceEncoder struct {
+	sliceType   reflect.Type
+	elemType    reflect.Type
+	elemEncoder Encoder
+}
+
+func (encoder *sliceEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
+	slice := (*sliceHeader)(ptr)
+	if slice.Data == nil {
+		stream.WriteNil()
+		return
+	}
+	if slice.Len == 0 {
+		stream.WriteEmptyArray()
+		return
+	}
+	stream.WriteArrayStart()
+	elemPtr := uintptr(slice.Data)
+	encoder.elemEncoder.encode(unsafe.Pointer(elemPtr), stream)
+	for i := 1; i < slice.Len; i++ {
+		stream.WriteMore()
+		elemPtr += encoder.elemType.Size()
+		encoder.elemEncoder.encode(unsafe.Pointer(elemPtr), stream)
+	}
+	stream.WriteArrayEnd()
+	if stream.Error != nil && stream.Error != io.EOF {
+		stream.Error = fmt.Errorf("%v: %s", encoder.sliceType, stream.Error.Error())
+	}
+}
+
+func (encoder *sliceEncoder) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (encoder *sliceEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	slice := (*sliceHeader)(ptr)
+	return slice.Len == 0
+}
+
+type sliceDecoder struct {
+	sliceType   reflect.Type
+	elemType    reflect.Type
+	elemDecoder Decoder
+}
+
+// sliceHeader is a safe version of SliceHeader used within this package.
+type sliceHeader struct {
+	Data unsafe.Pointer
+	Len  int
+	Cap  int
+}
+
+func (decoder *sliceDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
+	decoder.doDecode(ptr, iter)
+	if iter.Error != nil && iter.Error != io.EOF {
+		iter.Error = fmt.Errorf("%v: %s", decoder.sliceType, iter.Error.Error())
+	}
+}
+
+func (decoder *sliceDecoder) doDecode(ptr unsafe.Pointer, iter *Iterator) {
+	slice := (*sliceHeader)(ptr)
+	reuseSlice(slice, decoder.sliceType, 4)
+	if !iter.ReadArray() {
+		return
+	}
+	offset := uintptr(0)
+	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data)+offset), iter)
+	if !iter.ReadArray() {
+		slice.Len = 1
+		return
+	}
+	offset += decoder.elemType.Size()
+	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data)+offset), iter)
+	if !iter.ReadArray() {
+		slice.Len = 2
+		return
+	}
+	offset += decoder.elemType.Size()
+	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data)+offset), iter)
+	if !iter.ReadArray() {
+		slice.Len = 3
+		return
+	}
+	offset += decoder.elemType.Size()
+	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data)+offset), iter)
+	slice.Len = 4
+	for iter.ReadArray() {
+		growOne(slice, decoder.sliceType, decoder.elemType)
+		offset += decoder.elemType.Size()
+		decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data)+offset), iter)
+	}
+}
+
+// grow grows the slice s so that it can hold extra more values, allocating
+// more capacity if needed. It also returns the old and new slice lengths.
+func growOne(slice *sliceHeader, sliceType reflect.Type, elementType reflect.Type) {
+	newLen := slice.Len + 1
+	if newLen <= slice.Cap {
+		slice.Len = newLen
+		return
+	}
+	newCap := slice.Cap
+	if newCap == 0 {
+		newCap = 1
+	} else {
+		for newCap < newLen {
+			if slice.Len < 1024 {
+				newCap += newCap
+			} else {
+				newCap += newCap / 4
+			}
+		}
+	}
+	dst := unsafe.Pointer(reflect.MakeSlice(sliceType, newLen, newCap).Pointer())
+	// copy old array into new array
+	originalBytesCount := uintptr(slice.Len) * elementType.Size()
+	srcPtr := (*[1 << 30]byte)(slice.Data)
+	dstPtr := (*[1 << 30]byte)(dst)
+	for i := uintptr(0); i < originalBytesCount; i++ {
+		dstPtr[i] = srcPtr[i]
+	}
+	slice.Len = newLen
+	slice.Cap = newCap
+	slice.Data = dst
+}
+
+func reuseSlice(slice *sliceHeader, sliceType reflect.Type, expectedCap int) {
+	if expectedCap <= slice.Cap {
+		return
+	}
+	dst := unsafe.Pointer(reflect.MakeSlice(sliceType, 0, expectedCap).Pointer())
+	slice.Cap = expectedCap
+	slice.Data = dst
+}

feature_reflect_map.go

@@ -0,0 +1,217 @@
+package jsoniter
+
+import (
+	"encoding"
+	"encoding/json"
+	"reflect"
+	"strconv"
+	"unsafe"
+	"sort"
+)
+
+type mapDecoder struct {
+	mapType      reflect.Type
+	keyType      reflect.Type
+	elemType     reflect.Type
+	elemDecoder  Decoder
+	mapInterface emptyInterface
+}
+
+func (decoder *mapDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
+	// dark magic to cast unsafe.Pointer back to interface{} using reflect.Type
+	mapInterface := decoder.mapInterface
+	mapInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
+	realVal := reflect.ValueOf(*realInterface).Elem()
+	if realVal.IsNil() {
+		realVal.Set(reflect.MakeMap(realVal.Type()))
+	}
+	iter.ReadMapCB(func(iter *Iterator, keyStr string) bool {
+		elem := reflect.New(decoder.elemType)
+		decoder.elemDecoder.decode(unsafe.Pointer(elem.Pointer()), iter)
+		// to put into map, we have to use reflection
+		keyType := decoder.keyType
+		switch {
+		case keyType.Kind() == reflect.String:
+			realVal.SetMapIndex(reflect.ValueOf(keyStr), elem.Elem())
+			return true
+		case keyType.Implements(textUnmarshalerType):
+			textUnmarshaler := reflect.New(keyType.Elem()).Interface().(encoding.TextUnmarshaler)
+			err := textUnmarshaler.UnmarshalText([]byte(keyStr))
+			if err != nil {
+				iter.reportError("read map key as TextUnmarshaler", err.Error())
+				return false
+			}
+			realVal.SetMapIndex(reflect.ValueOf(textUnmarshaler), elem.Elem())
+			return true
+		default:
+			switch keyType.Kind() {
+			case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+				n, err := strconv.ParseInt(keyStr, 10, 64)
+				if err != nil || reflect.Zero(keyType).OverflowInt(n) {
+					iter.reportError("read map key as int64", "read int64 failed")
+					return false
+				}
+				realVal.SetMapIndex(reflect.ValueOf(n).Convert(keyType), elem.Elem())
+				return true
+			case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+				n, err := strconv.ParseUint(keyStr, 10, 64)
+				if err != nil || reflect.Zero(keyType).OverflowUint(n) {
+					iter.reportError("read map key as uint64", "read uint64 failed")
+					return false
+				}
+				realVal.SetMapIndex(reflect.ValueOf(n).Convert(keyType), elem.Elem())
+				return true
+			}
+		}
+		iter.reportError("read map key", "unexpected map key type "+keyType.String())
+		return true
+	})
+}
+
+type mapEncoder struct {
+	mapType      reflect.Type
+	elemType     reflect.Type
+	elemEncoder  Encoder
+	mapInterface emptyInterface
+}
+
+func (encoder *mapEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
+	mapInterface := encoder.mapInterface
+	mapInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
+	realVal := reflect.ValueOf(*realInterface)
+
+	stream.WriteObjectStart()
+	for i, key := range realVal.MapKeys() {
+		if i != 0 {
+			stream.WriteMore()
+		}
+		encodeMapKey(key, stream)
+		stream.writeByte(':')
+		val := realVal.MapIndex(key).Interface()
+		encoder.elemEncoder.encodeInterface(val, stream)
+	}
+	stream.WriteObjectEnd()
+}
+
+func encodeMapKey(key reflect.Value, stream *Stream) {
+	if key.Kind() == reflect.String {
+		stream.WriteString(key.String())
+		return
+	}
+	if tm, ok := key.Interface().(encoding.TextMarshaler); ok {
+		buf, err := tm.MarshalText()
+		if err != nil {
+			stream.Error = err
+			return
+		}
+		stream.writeByte('"')
+		stream.Write(buf)
+		stream.writeByte('"')
+		return
+	}
+	switch key.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		stream.writeByte('"')
+		stream.WriteInt64(key.Int())
+		stream.writeByte('"')
+		return
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		stream.writeByte('"')
+		stream.WriteUint64(key.Uint())
+		stream.writeByte('"')
+		return
+	}
+	stream.Error = &json.UnsupportedTypeError{key.Type()}
+}
+
+func (encoder *mapEncoder) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (encoder *mapEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	mapInterface := encoder.mapInterface
+	mapInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
+	realVal := reflect.ValueOf(*realInterface)
+	return realVal.Len() == 0
+}
+
+type sortKeysMapEncoder struct {
+	mapType      reflect.Type
+	elemType     reflect.Type
+	elemEncoder  Encoder
+	mapInterface emptyInterface
+}
+
+func (encoder *sortKeysMapEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
+	mapInterface := encoder.mapInterface
+	mapInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
+	realVal := reflect.ValueOf(*realInterface)
+
+
+	// Extract and sort the keys.
+	keys := realVal.MapKeys()
+	sv := make([]reflectWithString, len(keys))
+	for i, v := range keys {
+		sv[i].v = v
+		if err := sv[i].resolve(); err != nil {
+			stream.Error = err
+			return
+		}
+	}
+	sort.Slice(sv, func(i, j int) bool { return sv[i].s < sv[j].s })
+
+	stream.WriteObjectStart()
+	for i, key := range sv {
+		if i != 0 {
+			stream.WriteMore()
+		}
+		encodeMapKey(key.v, stream)
+		stream.writeByte(':')
+		val := realVal.MapIndex(key.v).Interface()
+		encoder.elemEncoder.encodeInterface(val, stream)
+	}
+	stream.WriteObjectEnd()
+}
+
+
+type reflectWithString struct {
+	v reflect.Value
+	s string
+}
+
+func (w *reflectWithString) resolve() error {
+	if w.v.Kind() == reflect.String {
+		w.s = w.v.String()
+		return nil
+	}
+	if tm, ok := w.v.Interface().(encoding.TextMarshaler); ok {
+		buf, err := tm.MarshalText()
+		w.s = string(buf)
+		return err
+	}
+	switch w.v.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		w.s = strconv.FormatInt(w.v.Int(), 10)
+		return nil
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		w.s = strconv.FormatUint(w.v.Uint(), 10)
+		return nil
+	}
+	panic("unexpected map key type")
+}
+
+func (encoder *sortKeysMapEncoder) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (encoder *sortKeysMapEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	mapInterface := encoder.mapInterface
+	mapInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
+	realVal := reflect.ValueOf(*realInterface)
+	return realVal.Len() == 0
+}

feature_reflect_native.go

@@ -0,0 +1,498 @@
+package jsoniter
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"unsafe"
+)
+
+type stringCodec struct {
+}
+
+func (codec *stringCodec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*string)(ptr)) = iter.ReadString()
+}
+
+func (codec *stringCodec) encode(ptr unsafe.Pointer, stream *Stream) {
+	str := *((*string)(ptr))
+	stream.WriteString(str)
+}
+
+func (encoder *stringCodec) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *stringCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*string)(ptr)) == ""
+}
+
+type intCodec struct {
+}
+
+func (codec *intCodec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*int)(ptr)) = iter.ReadInt()
+}
+
+func (codec *intCodec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteInt(*((*int)(ptr)))
+}
+
+func (encoder *intCodec) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *intCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*int)(ptr)) == 0
+}
+
+type int8Codec struct {
+}
+
+func (codec *int8Codec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*int8)(ptr)) = iter.ReadInt8()
+}
+
+func (codec *int8Codec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteInt8(*((*int8)(ptr)))
+}
+
+func (encoder *int8Codec) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *int8Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*int8)(ptr)) == 0
+}
+
+type int16Codec struct {
+}
+
+func (codec *int16Codec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*int16)(ptr)) = iter.ReadInt16()
+}
+
+func (codec *int16Codec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteInt16(*((*int16)(ptr)))
+}
+
+func (encoder *int16Codec) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *int16Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*int16)(ptr)) == 0
+}
+
+type int32Codec struct {
+}
+
+func (codec *int32Codec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*int32)(ptr)) = iter.ReadInt32()
+}
+
+func (codec *int32Codec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteInt32(*((*int32)(ptr)))
+}
+
+func (encoder *int32Codec) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *int32Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*int32)(ptr)) == 0
+}
+
+type int64Codec struct {
+}
+
+func (codec *int64Codec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*int64)(ptr)) = iter.ReadInt64()
+}
+
+func (codec *int64Codec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteInt64(*((*int64)(ptr)))
+}
+
+func (encoder *int64Codec) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *int64Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*int64)(ptr)) == 0
+}
+
+type uintCodec struct {
+}
+
+func (codec *uintCodec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*uint)(ptr)) = iter.ReadUint()
+}
+
+func (codec *uintCodec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteUint(*((*uint)(ptr)))
+}
+
+func (encoder *uintCodec) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *uintCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*uint)(ptr)) == 0
+}
+
+type uint8Codec struct {
+}
+
+func (codec *uint8Codec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*uint8)(ptr)) = iter.ReadUint8()
+}
+
+func (codec *uint8Codec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteUint8(*((*uint8)(ptr)))
+}
+
+func (encoder *uint8Codec) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *uint8Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*uint8)(ptr)) == 0
+}
+
+type uint16Codec struct {
+}
+
+func (decoder *uint16Codec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*uint16)(ptr)) = iter.ReadUint16()
+}
+
+func (codec *uint16Codec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteUint16(*((*uint16)(ptr)))
+}
+
+func (encoder *uint16Codec) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *uint16Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*uint16)(ptr)) == 0
+}
+
+type uint32Codec struct {
+}
+
+func (codec *uint32Codec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*uint32)(ptr)) = iter.ReadUint32()
+}
+
+func (codec *uint32Codec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteUint32(*((*uint32)(ptr)))
+}
+
+func (encoder *uint32Codec) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *uint32Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*uint32)(ptr)) == 0
+}
+
+type uint64Codec struct {
+}
+
+func (codec *uint64Codec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*uint64)(ptr)) = iter.ReadUint64()
+}
+
+func (codec *uint64Codec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteUint64(*((*uint64)(ptr)))
+}
+
+func (encoder *uint64Codec) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *uint64Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*uint64)(ptr)) == 0
+}
+
+type float32Codec struct {
+}
+
+func (codec *float32Codec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*float32)(ptr)) = iter.ReadFloat32()
+}
+
+func (codec *float32Codec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteFloat32(*((*float32)(ptr)))
+}
+
+func (encoder *float32Codec) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *float32Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*float32)(ptr)) == 0
+}
+
+type float64Codec struct {
+}
+
+func (codec *float64Codec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*float64)(ptr)) = iter.ReadFloat64()
+}
+
+func (codec *float64Codec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteFloat64(*((*float64)(ptr)))
+}
+
+func (encoder *float64Codec) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *float64Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return *((*float64)(ptr)) == 0
+}
+
+type boolCodec struct {
+}
+
+func (codec *boolCodec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*bool)(ptr)) = iter.ReadBool()
+}
+
+func (codec *boolCodec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteBool(*((*bool)(ptr)))
+}
+
+func (encoder *boolCodec) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (codec *boolCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return !(*((*bool)(ptr)))
+}
+
+type emptyInterfaceCodec struct {
+}
+
+func (codec *emptyInterfaceCodec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*interface{})(ptr)) = iter.Read()
+}
+
+func (codec *emptyInterfaceCodec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteVal(*((*interface{})(ptr)))
+}
+
+func (encoder *emptyInterfaceCodec) encodeInterface(val interface{}, stream *Stream) {
+	stream.WriteVal(val)
+}
+
+func (codec *emptyInterfaceCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return ptr == nil
+}
+
+type nonEmptyInterfaceCodec struct {
+}
+
+func (codec *nonEmptyInterfaceCodec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	nonEmptyInterface := (*nonEmptyInterface)(ptr)
+	if nonEmptyInterface.itab == nil {
+		iter.reportError("read non-empty interface", "do not know which concrete type to decode to")
+		return
+	}
+	var i interface{}
+	e := (*emptyInterface)(unsafe.Pointer(&i))
+	e.typ = nonEmptyInterface.itab.typ
+	e.word = nonEmptyInterface.word
+	iter.ReadVal(&i)
+	nonEmptyInterface.word = e.word
+}
+
+func (codec *nonEmptyInterfaceCodec) encode(ptr unsafe.Pointer, stream *Stream) {
+	nonEmptyInterface := (*nonEmptyInterface)(ptr)
+	var i interface{}
+	e := (*emptyInterface)(unsafe.Pointer(&i))
+	e.typ = nonEmptyInterface.itab.typ
+	e.word = nonEmptyInterface.word
+	stream.WriteVal(i)
+}
+
+func (encoder *nonEmptyInterfaceCodec) encodeInterface(val interface{}, stream *Stream) {
+	stream.WriteVal(val)
+}
+
+func (codec *nonEmptyInterfaceCodec) isEmpty(ptr unsafe.Pointer) bool {
+	nonEmptyInterface := (*nonEmptyInterface)(ptr)
+	return nonEmptyInterface.word == nil
+}
+
+type anyCodec struct {
+}
+
+func (codec *anyCodec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*Any)(ptr)) = iter.ReadAny()
+}
+
+func (codec *anyCodec) encode(ptr unsafe.Pointer, stream *Stream) {
+	(*((*Any)(ptr))).WriteTo(stream)
+}
+
+func (encoder *anyCodec) encodeInterface(val interface{}, stream *Stream) {
+	(val.(Any)).WriteTo(stream)
+}
+
+func (encoder *anyCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return (*((*Any)(ptr))).Size() == 0
+}
+
+type jsonNumberCodec struct {
+}
+
+func (codec *jsonNumberCodec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*json.Number)(ptr)) = json.Number([]byte(iter.readNumberAsString()))
+}
+
+func (codec *jsonNumberCodec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteRaw(string(*((*json.Number)(ptr))))
+}
+
+func (encoder *jsonNumberCodec) encodeInterface(val interface{}, stream *Stream) {
+	stream.WriteRaw(string(val.(json.Number)))
+}
+
+func (encoder *jsonNumberCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return len(*((*json.Number)(ptr))) == 0
+}
+
+type jsonRawMessageCodec struct {
+}
+
+func (codec *jsonRawMessageCodec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	*((*json.RawMessage)(ptr)) = json.RawMessage(iter.SkipAndReturnBytes())
+}
+
+func (codec *jsonRawMessageCodec) encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteRaw(string(*((*json.RawMessage)(ptr))))
+}
+
+func (encoder *jsonRawMessageCodec) encodeInterface(val interface{}, stream *Stream) {
+	stream.WriteRaw(string(val.(json.RawMessage)))
+}
+
+func (encoder *jsonRawMessageCodec) isEmpty(ptr unsafe.Pointer) bool {
+	return len(*((*json.RawMessage)(ptr))) == 0
+}
+
+type base64Codec struct {
+}
+
+func (codec *base64Codec) decode(ptr unsafe.Pointer, iter *Iterator) {
+	encoding := base64.StdEncoding
+	src := iter.SkipAndReturnBytes()
+	src = src[1 : len(src)-1]
+	decodedLen := encoding.DecodedLen(len(src))
+	dst := make([]byte, decodedLen)
+	_, err := encoding.Decode(dst, src)
+	if err != nil {
+		iter.reportError("decode base64", err.Error())
+	} else {
+		*((*[]byte)(ptr)) = dst
+	}
+}
+
+func (codec *base64Codec) encode(ptr unsafe.Pointer, stream *Stream) {
+	encoding := base64.StdEncoding
+	stream.writeByte('"')
+	src := *((*[]byte)(ptr))
+	toGrow := encoding.EncodedLen(len(src))
+	stream.ensure(toGrow)
+	encoding.Encode(stream.buf[stream.n:], src)
+	stream.n += toGrow
+	stream.writeByte('"')
+}
+
+func (encoder *base64Codec) encodeInterface(val interface{}, stream *Stream) {
+	encoding := base64.StdEncoding
+	stream.writeByte('"')
+	src := val.([]byte)
+	toGrow := encoding.EncodedLen(len(src))
+	stream.ensure(toGrow)
+	encoding.Encode(stream.buf[stream.n:], src)
+	stream.n += toGrow
+	stream.writeByte('"')
+}
+
+func (encoder *base64Codec) isEmpty(ptr unsafe.Pointer) bool {
+	return len(*((*[]byte)(ptr))) == 0
+}
+
+type stringNumberDecoder struct {
+	elemDecoder Decoder
+}
+
+func (decoder *stringNumberDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
+	c := iter.nextToken()
+	if c != '"' {
+		iter.reportError("stringNumberDecoder", `expect "`)
+		return
+	}
+	decoder.elemDecoder.decode(ptr, iter)
+	if iter.Error != nil {
+		return
+	}
+	c = iter.readByte()
+	if c != '"' {
+		iter.reportError("stringNumberDecoder", `expect "`)
+		return
+	}
+}
+
+type marshalerEncoder struct {
+	templateInterface emptyInterface
+}
+
+func (encoder *marshalerEncoder) encode(ptr unsafe.Pointer, stream *Stream) {
+	templateInterface := encoder.templateInterface
+	templateInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&templateInterface))
+	marshaler := (*realInterface).(json.Marshaler)
+	bytes, err := marshaler.MarshalJSON()
+	if err != nil {
+		stream.Error = err
+	} else {
+		stream.Write(bytes)
+	}
+}
+func (encoder *marshalerEncoder) encodeInterface(val interface{}, stream *Stream) {
+	writeToStream(val, stream, encoder)
+}
+
+func (encoder *marshalerEncoder) isEmpty(ptr unsafe.Pointer) bool {
+	templateInterface := encoder.templateInterface
+	templateInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&templateInterface))
+	marshaler := (*realInterface).(json.Marshaler)
+	bytes, err := marshaler.MarshalJSON()
+	if err != nil {
+		return true
+	} else {
+		return len(bytes) > 0
+	}
+}
+
+type unmarshalerDecoder struct {
+	templateInterface emptyInterface
+}
+
+func (decoder *unmarshalerDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
+	templateInterface := decoder.templateInterface
+	templateInterface.word = ptr
+	realInterface := (*interface{})(unsafe.Pointer(&templateInterface))
+	unmarshaler := (*realInterface).(json.Unmarshaler)
+	bytes := iter.SkipAndReturnBytes()
+	err := unmarshaler.UnmarshalJSON(bytes)
+	if err != nil {
+		iter.reportError("unmarshaler", err.Error())
+	}
+}

feature_stream.go

@@ -0,0 +1,275 @@
+package jsoniter
+
+import (
+	"io"
+)
+
+type Stream struct {
+	cfg       *frozenConfig
+	out       io.Writer
+	buf       []byte
+	n         int
+	Error     error
+	indention int
+}
+
+func NewStream(cfg *frozenConfig, out io.Writer, bufSize int) *Stream {
+	return &Stream{
+		cfg:       cfg,
+		out:       out,
+		buf:       make([]byte, bufSize),
+		n:         0,
+		Error:     nil,
+		indention: 0,
+	}
+}
+
+func (b *Stream) Reset(out io.Writer) {
+	b.out = out
+	b.n = 0
+}
+
+// Available returns how many bytes are unused in the buffer.
+func (b *Stream) Available() int {
+	return len(b.buf) - b.n
+}
+
+// Buffered returns the number of bytes that have been written into the current buffer.
+func (b *Stream) Buffered() int {
+	return b.n
+}
+
+func (b *Stream) Buffer() []byte {
+	return b.buf[:b.n]
+}
+
+// Write writes the contents of p into the buffer.
+// It returns the number of bytes written.
+// If nn < len(p), it also returns an error explaining
+// why the write is short.
+func (b *Stream) Write(p []byte) (nn int, err error) {
+	for len(p) > b.Available() && b.Error == nil {
+		if b.out == nil {
+			b.growAtLeast(len(p))
+		} else {
+			var n int
+			if b.Buffered() == 0 {
+				// Large write, empty buffer.
+				// Write directly from p to avoid copy.
+				n, b.Error = b.out.Write(p)
+			} else {
+				n = copy(b.buf[b.n:], p)
+				b.n += n
+				b.Flush()
+			}
+			nn += n
+			p = p[n:]
+		}
+	}
+	if b.Error != nil {
+		return nn, b.Error
+	}
+	n := copy(b.buf[b.n:], p)
+	b.n += n
+	nn += n
+	return nn, nil
+}
+
+// WriteByte writes a single byte.
+func (b *Stream) writeByte(c byte) {
+	if b.Error != nil {
+		return
+	}
+	if b.Available() < 1 {
+		b.growAtLeast(1)
+	}
+	b.buf[b.n] = c
+	b.n++
+}
+
+func (b *Stream) writeTwoBytes(c1 byte, c2 byte) {
+	if b.Error != nil {
+		return
+	}
+	if b.Available() < 2 {
+		b.growAtLeast(2)
+	}
+	b.buf[b.n] = c1
+	b.buf[b.n+1] = c2
+	b.n += 2
+}
+
+func (b *Stream) writeThreeBytes(c1 byte, c2 byte, c3 byte) {
+	if b.Error != nil {
+		return
+	}
+	if b.Available() < 3 {
+		b.growAtLeast(3)
+	}
+	b.buf[b.n] = c1
+	b.buf[b.n+1] = c2
+	b.buf[b.n+2] = c3
+	b.n += 3
+}
+
+func (b *Stream) writeFourBytes(c1 byte, c2 byte, c3 byte, c4 byte) {
+	if b.Error != nil {
+		return
+	}
+	if b.Available() < 4 {
+		b.growAtLeast(4)
+	}
+	b.buf[b.n] = c1
+	b.buf[b.n+1] = c2
+	b.buf[b.n+2] = c3
+	b.buf[b.n+3] = c4
+	b.n += 4
+}
+
+func (b *Stream) writeFiveBytes(c1 byte, c2 byte, c3 byte, c4 byte, c5 byte) {
+	if b.Error != nil {
+		return
+	}
+	if b.Available() < 5 {
+		b.growAtLeast(5)
+	}
+	b.buf[b.n] = c1
+	b.buf[b.n+1] = c2
+	b.buf[b.n+2] = c3
+	b.buf[b.n+3] = c4
+	b.buf[b.n+4] = c5
+	b.n += 5
+}
+
+// Flush writes any buffered data to the underlying io.Writer.
+func (b *Stream) Flush() error {
+	if b.out == nil {
+		return nil
+	}
+	if b.Error != nil {
+		return b.Error
+	}
+	if b.n == 0 {
+		return nil
+	}
+	n, err := b.out.Write(b.buf[0:b.n])
+	if n < b.n && err == nil {
+		err = io.ErrShortWrite
+	}
+	if err != nil {
+		if n > 0 && n < b.n {
+			copy(b.buf[0:b.n-n], b.buf[n:b.n])
+		}
+		b.n -= n
+		b.Error = err
+		return err
+	}
+	b.n = 0
+	return nil
+}
+
+func (b *Stream) ensure(minimal int) {
+	available := b.Available()
+	if available < minimal {
+		if b.n > 1024 {
+			b.Flush()
+		}
+		b.growAtLeast(minimal)
+	}
+}
+
+func (b *Stream) growAtLeast(minimal int) {
+	toGrow := len(b.buf)
+	if toGrow < minimal {
+		toGrow = minimal
+	}
+	newBuf := make([]byte, len(b.buf)+toGrow)
+	copy(newBuf, b.Buffer())
+	b.buf = newBuf
+}
+
+func (b *Stream) WriteRaw(s string) {
+	b.ensure(len(s))
+	if b.Error != nil {
+		return
+	}
+	n := copy(b.buf[b.n:], s)
+	b.n += n
+}
+
+func (stream *Stream) WriteNil() {
+	stream.writeFourBytes('n', 'u', 'l', 'l')
+}
+
+func (stream *Stream) WriteTrue() {
+	stream.writeFourBytes('t', 'r', 'u', 'e')
+}
+
+func (stream *Stream) WriteFalse() {
+	stream.writeFiveBytes('f', 'a', 'l', 's', 'e')
+}
+
+func (stream *Stream) WriteBool(val bool) {
+	if val {
+		stream.WriteTrue()
+	} else {
+		stream.WriteFalse()
+	}
+}
+
+func (stream *Stream) WriteObjectStart() {
+	stream.indention += stream.cfg.indentionStep
+	stream.writeByte('{')
+	stream.writeIndention(0)
+}
+
+func (stream *Stream) WriteObjectField(field string) {
+	stream.WriteString(field)
+	stream.writeByte(':')
+}
+
+func (stream *Stream) WriteObjectEnd() {
+	stream.writeIndention(stream.cfg.indentionStep)
+	stream.indention -= stream.cfg.indentionStep
+	stream.writeByte('}')
+}
+
+func (stream *Stream) WriteEmptyObject() {
+	stream.writeByte('{')
+	stream.writeByte('}')
+}
+
+func (stream *Stream) WriteMore() {
+	stream.writeByte(',')
+	stream.writeIndention(0)
+}
+
+func (stream *Stream) WriteArrayStart() {
+	stream.indention += stream.cfg.indentionStep
+	stream.writeByte('[')
+	stream.writeIndention(0)
+}
+
+func (stream *Stream) WriteEmptyArray() {
+	stream.writeByte('[')
+	stream.writeByte(']')
+}
+
+func (stream *Stream) WriteArrayEnd() {
+	stream.writeIndention(stream.cfg.indentionStep)
+	stream.indention -= stream.cfg.indentionStep
+	stream.writeByte(']')
+}
+
+func (stream *Stream) writeIndention(delta int) {
+	if stream.indention == 0 {
+		return
+	}
+	stream.writeByte('\n')
+	toWrite := stream.indention - delta
+	stream.ensure(toWrite)
+	for i := 0; i < toWrite && stream.n < len(stream.buf); i++ {
+		stream.buf[stream.n] = ' '
+		stream.n++
+	}
+}

feature_stream_float.go

@@ -0,0 +1,75 @@
+package jsoniter
+
+import (
+	"strconv"
+)
+
+var _POW10 []uint64
+
+func init() {
+	_POW10 = []uint64{1, 10, 100, 1000, 10000, 100000, 1000000}
+}
+
+func (stream *Stream) WriteFloat32(val float32) {
+	stream.WriteRaw(strconv.FormatFloat(float64(val), 'f', -1, 32))
+}
+
+func (stream *Stream) WriteFloat32Lossy(val float32) {
+	if val < 0 {
+		stream.writeByte('-')
+		val = -val
+	}
+	if val > 0x4ffffff {
+		stream.WriteRaw(strconv.FormatFloat(float64(val), 'f', -1, 32))
+		return
+	}
+	precision := 6
+	exp := uint64(1000000) // 6
+	lval := uint64(float64(val)*float64(exp) + 0.5)
+	stream.WriteUint64(lval / exp)
+	fval := lval % exp
+	if fval == 0 {
+		return
+	}
+	stream.writeByte('.')
+	stream.ensure(10)
+	for p := precision - 1; p > 0 && fval < _POW10[p]; p-- {
+		stream.writeByte('0')
+	}
+	stream.WriteUint64(fval)
+	for stream.buf[stream.n-1] == '0' {
+		stream.n--
+	}
+}
+
+func (stream *Stream) WriteFloat64(val float64) {
+	stream.WriteRaw(strconv.FormatFloat(float64(val), 'f', -1, 64))
+}
+
+func (stream *Stream) WriteFloat64Lossy(val float64) {
+	if val < 0 {
+		stream.writeByte('-')
+		val = -val
+	}
+	if val > 0x4ffffff {
+		stream.WriteRaw(strconv.FormatFloat(val, 'f', -1, 64))
+		return
+	}
+	precision := 6
+	exp := uint64(1000000) // 6
+	lval := uint64(val*float64(exp) + 0.5)
+	stream.WriteUint64(lval / exp)
+	fval := lval % exp
+	if fval == 0 {
+		return
+	}
+	stream.writeByte('.')
+	stream.ensure(10)
+	for p := precision - 1; p > 0 && fval < _POW10[p]; p-- {
+		stream.writeByte('0')
+	}
+	stream.WriteUint64(fval)
+	for stream.buf[stream.n-1] == '0' {
+		stream.n--
+	}
+}

feature_stream_int.go

@@ -0,0 +1,310 @@
+package jsoniter
+
+var _DIGITS []uint32
+
+func init() {
+	_DIGITS = make([]uint32, 1000)
+	for i := uint32(0); i < 1000; i++ {
+		_DIGITS[i] = (((i / 100) + '0') << 16) + ((((i / 10) % 10) + '0') << 8) + i%10 + '0'
+		if i < 10 {
+			_DIGITS[i] += 2 << 24
+		} else if i < 100 {
+			_DIGITS[i] += 1 << 24
+		}
+	}
+}
+
+func writeFirstBuf(buf []byte, v uint32, n int) int {
+	start := v >> 24
+	if start == 0 {
+		buf[n] = byte(v >> 16)
+		n++
+		buf[n] = byte(v >> 8)
+		n++
+	} else if start == 1 {
+		buf[n] = byte(v >> 8)
+		n++
+	}
+	buf[n] = byte(v)
+	n++
+	return n
+}
+
+func writeBuf(buf []byte, v uint32, n int) {
+	buf[n] = byte(v >> 16)
+	buf[n+1] = byte(v >> 8)
+	buf[n+2] = byte(v)
+}
+
+func (stream *Stream) WriteUint8(val uint8) {
+	stream.ensure(3)
+	stream.n = writeFirstBuf(stream.buf, _DIGITS[val], stream.n)
+}
+
+func (stream *Stream) WriteInt8(nval int8) {
+	stream.ensure(4)
+	n := stream.n
+	var val uint8
+	if nval < 0 {
+		val = uint8(-nval)
+		stream.buf[n] = '-'
+		n++
+	} else {
+		val = uint8(nval)
+	}
+	stream.n = writeFirstBuf(stream.buf, _DIGITS[val], n)
+}
+
+func (stream *Stream) WriteUint16(val uint16) {
+	stream.ensure(5)
+	q1 := val / 1000
+	if q1 == 0 {
+		stream.n = writeFirstBuf(stream.buf, _DIGITS[val], stream.n)
+		return
+	}
+	r1 := val - q1*1000
+	n := writeFirstBuf(stream.buf, _DIGITS[q1], stream.n)
+	writeBuf(stream.buf, _DIGITS[r1], n)
+	stream.n = n + 3
+	return
+}
+
+func (stream *Stream) WriteInt16(nval int16) {
+	stream.ensure(6)
+	n := stream.n
+	var val uint16
+	if nval < 0 {
+		val = uint16(-nval)
+		stream.buf[n] = '-'
+		n++
+	} else {
+		val = uint16(nval)
+	}
+	q1 := val / 1000
+	if q1 == 0 {
+		stream.n = writeFirstBuf(stream.buf, _DIGITS[val], n)
+		return
+	}
+	r1 := val - q1*1000
+	n = writeFirstBuf(stream.buf, _DIGITS[q1], n)
+	writeBuf(stream.buf, _DIGITS[r1], n)
+	stream.n = n + 3
+	return
+}
+
+func (stream *Stream) WriteUint32(val uint32) {
+	stream.ensure(10)
+	n := stream.n
+	q1 := val / 1000
+	if q1 == 0 {
+		stream.n = writeFirstBuf(stream.buf, _DIGITS[val], n)
+		return
+	}
+	r1 := val - q1*1000
+	q2 := q1 / 1000
+	if q2 == 0 {
+		n := writeFirstBuf(stream.buf, _DIGITS[q1], n)
+		writeBuf(stream.buf, _DIGITS[r1], n)
+		stream.n = n + 3
+		return
+	}
+	r2 := q1 - q2*1000
+	q3 := q2 / 1000
+	if q3 == 0 {
+		n = writeFirstBuf(stream.buf, _DIGITS[q2], n)
+	} else {
+		r3 := q2 - q3*1000
+		stream.buf[n] = byte(q3 + '0')
+		n++
+		writeBuf(stream.buf, _DIGITS[r3], n)
+		n += 3
+	}
+	writeBuf(stream.buf, _DIGITS[r2], n)
+	writeBuf(stream.buf, _DIGITS[r1], n+3)
+	stream.n = n + 6
+}
+
+func (stream *Stream) WriteInt32(nval int32) {
+	stream.ensure(11)
+	n := stream.n
+	var val uint32
+	if nval < 0 {
+		val = uint32(-nval)
+		stream.buf[n] = '-'
+		n++
+	} else {
+		val = uint32(nval)
+	}
+	q1 := val / 1000
+	if q1 == 0 {
+		stream.n = writeFirstBuf(stream.buf, _DIGITS[val], n)
+		return
+	}
+	r1 := val - q1*1000
+	q2 := q1 / 1000
+	if q2 == 0 {
+		n := writeFirstBuf(stream.buf, _DIGITS[q1], n)
+		writeBuf(stream.buf, _DIGITS[r1], n)
+		stream.n = n + 3
+		return
+	}
+	r2 := q1 - q2*1000
+	q3 := q2 / 1000
+	if q3 == 0 {
+		n = writeFirstBuf(stream.buf, _DIGITS[q2], n)
+	} else {
+		r3 := q2 - q3*1000
+		stream.buf[n] = byte(q3 + '0')
+		n++
+		writeBuf(stream.buf, _DIGITS[r3], n)
+		n += 3
+	}
+	writeBuf(stream.buf, _DIGITS[r2], n)
+	writeBuf(stream.buf, _DIGITS[r1], n+3)
+	stream.n = n + 6
+}
+
+func (stream *Stream) WriteUint64(val uint64) {
+	stream.ensure(20)
+	n := stream.n
+	q1 := val / 1000
+	if q1 == 0 {
+		stream.n = writeFirstBuf(stream.buf, _DIGITS[val], n)
+		return
+	}
+	r1 := val - q1*1000
+	q2 := q1 / 1000
+	if q2 == 0 {
+		n := writeFirstBuf(stream.buf, _DIGITS[q1], n)
+		writeBuf(stream.buf, _DIGITS[r1], n)
+		stream.n = n + 3
+		return
+	}
+	r2 := q1 - q2*1000
+	q3 := q2 / 1000
+	if q3 == 0 {
+		n = writeFirstBuf(stream.buf, _DIGITS[q2], n)
+		writeBuf(stream.buf, _DIGITS[r2], n)
+		writeBuf(stream.buf, _DIGITS[r1], n+3)
+		stream.n = n + 6
+		return
+	}
+	r3 := q2 - q3*1000
+	q4 := q3 / 1000
+	if q4 == 0 {
+		n = writeFirstBuf(stream.buf, _DIGITS[q3], n)
+		writeBuf(stream.buf, _DIGITS[r3], n)
+		writeBuf(stream.buf, _DIGITS[r2], n+3)
+		writeBuf(stream.buf, _DIGITS[r1], n+6)
+		stream.n = n + 9
+		return
+	}
+	r4 := q3 - q4*1000
+	q5 := q4 / 1000
+	if q5 == 0 {
+		n = writeFirstBuf(stream.buf, _DIGITS[q4], n)
+		writeBuf(stream.buf, _DIGITS[r4], n)
+		writeBuf(stream.buf, _DIGITS[r3], n+3)
+		writeBuf(stream.buf, _DIGITS[r2], n+6)
+		writeBuf(stream.buf, _DIGITS[r1], n+9)
+		stream.n = n + 12
+		return
+	}
+	r5 := q4 - q5*1000
+	q6 := q5 / 1000
+	if q6 == 0 {
+		n = writeFirstBuf(stream.buf, _DIGITS[q5], n)
+	} else {
+		n = writeFirstBuf(stream.buf, _DIGITS[q6], n)
+		r6 := q5 - q6*1000
+		writeBuf(stream.buf, _DIGITS[r6], n)
+		n += 3
+	}
+	writeBuf(stream.buf, _DIGITS[r5], n)
+	writeBuf(stream.buf, _DIGITS[r4], n+3)
+	writeBuf(stream.buf, _DIGITS[r3], n+6)
+	writeBuf(stream.buf, _DIGITS[r2], n+9)
+	writeBuf(stream.buf, _DIGITS[r1], n+12)
+	stream.n = n + 15
+}
+
+func (stream *Stream) WriteInt64(nval int64) {
+	stream.ensure(20)
+	n := stream.n
+	var val uint64
+	if nval < 0 {
+		val = uint64(-nval)
+		stream.buf[n] = '-'
+		n++
+	} else {
+		val = uint64(nval)
+	}
+	q1 := val / 1000
+	if q1 == 0 {
+		stream.n = writeFirstBuf(stream.buf, _DIGITS[val], n)
+		return
+	}
+	r1 := val - q1*1000
+	q2 := q1 / 1000
+	if q2 == 0 {
+		n := writeFirstBuf(stream.buf, _DIGITS[q1], n)
+		writeBuf(stream.buf, _DIGITS[r1], n)
+		stream.n = n + 3
+		return
+	}
+	r2 := q1 - q2*1000
+	q3 := q2 / 1000
+	if q3 == 0 {
+		n = writeFirstBuf(stream.buf, _DIGITS[q2], n)
+		writeBuf(stream.buf, _DIGITS[r2], n)
+		writeBuf(stream.buf, _DIGITS[r1], n+3)
+		stream.n = n + 6
+		return
+	}
+	r3 := q2 - q3*1000
+	q4 := q3 / 1000
+	if q4 == 0 {
+		n = writeFirstBuf(stream.buf, _DIGITS[q3], n)
+		writeBuf(stream.buf, _DIGITS[r3], n)
+		writeBuf(stream.buf, _DIGITS[r2], n+3)
+		writeBuf(stream.buf, _DIGITS[r1], n+6)
+		stream.n = n + 9
+		return
+	}
+	r4 := q3 - q4*1000
+	q5 := q4 / 1000
+	if q5 == 0 {
+		n = writeFirstBuf(stream.buf, _DIGITS[q4], n)
+		writeBuf(stream.buf, _DIGITS[r4], n)
+		writeBuf(stream.buf, _DIGITS[r3], n+3)
+		writeBuf(stream.buf, _DIGITS[r2], n+6)
+		writeBuf(stream.buf, _DIGITS[r1], n+9)
+		stream.n = n + 12
+		return
+	}
+	r5 := q4 - q5*1000
+	q6 := q5 / 1000
+	if q6 == 0 {
+		n = writeFirstBuf(stream.buf, _DIGITS[q5], n)
+	} else {
+		stream.buf[n] = byte(q6 + '0')
+		n++
+		r6 := q5 - q6*1000
+		writeBuf(stream.buf, _DIGITS[r6], n)
+		n += 3
+	}
+	writeBuf(stream.buf, _DIGITS[r5], n)
+	writeBuf(stream.buf, _DIGITS[r4], n+3)
+	writeBuf(stream.buf, _DIGITS[r3], n+6)
+	writeBuf(stream.buf, _DIGITS[r2], n+9)
+	writeBuf(stream.buf, _DIGITS[r1], n+12)
+	stream.n = n + 15
+}
+
+func (stream *Stream) WriteInt(val int) {
+	stream.WriteInt64(int64(val))
+}
+
+func (stream *Stream) WriteUint(val uint) {
+	stream.WriteUint64(uint64(val))
+}

feature_stream_string.go

@@ -0,0 +1,351 @@
+package jsoniter
+
+import (
+	"unicode/utf8"
+)
+
+// htmlSafeSet holds the value true if the ASCII character with the given
+// array position can be safely represented inside a JSON string, embedded
+// inside of HTML <script> tags, without any additional escaping.
+//
+// All values are true except for the ASCII control characters (0-31), the
+// double quote ("), the backslash character ("\"), HTML opening and closing
+// tags ("<" and ">"), and the ampersand ("&").
+var htmlSafeSet = [utf8.RuneSelf]bool{
+	' ':      true,
+	'!':      true,
+	'"':      false,
+	'#':      true,
+	'$':      true,
+	'%':      true,
+	'&':      false,
+	'\'':     true,
+	'(':      true,
+	')':      true,
+	'*':      true,
+	'+':      true,
+	',':      true,
+	'-':      true,
+	'.':      true,
+	'/':      true,
+	'0':      true,
+	'1':      true,
+	'2':      true,
+	'3':      true,
+	'4':      true,
+	'5':      true,
+	'6':      true,
+	'7':      true,
+	'8':      true,
+	'9':      true,
+	':':      true,
+	';':      true,
+	'<':      false,
+	'=':      true,
+	'>':      false,
+	'?':      true,
+	'@':      true,
+	'A':      true,
+	'B':      true,
+	'C':      true,
+	'D':      true,
+	'E':      true,
+	'F':      true,
+	'G':      true,
+	'H':      true,
+	'I':      true,
+	'J':      true,
+	'K':      true,
+	'L':      true,
+	'M':      true,
+	'N':      true,
+	'O':      true,
+	'P':      true,
+	'Q':      true,
+	'R':      true,
+	'S':      true,
+	'T':      true,
+	'U':      true,
+	'V':      true,
+	'W':      true,
+	'X':      true,
+	'Y':      true,
+	'Z':      true,
+	'[':      true,
+	'\\':     false,
+	']':      true,
+	'^':      true,
+	'_':      true,
+	'`':      true,
+	'a':      true,
+	'b':      true,
+	'c':      true,
+	'd':      true,
+	'e':      true,
+	'f':      true,
+	'g':      true,
+	'h':      true,
+	'i':      true,
+	'j':      true,
+	'k':      true,
+	'l':      true,
+	'm':      true,
+	'n':      true,
+	'o':      true,
+	'p':      true,
+	'q':      true,
+	'r':      true,
+	's':      true,
+	't':      true,
+	'u':      true,
+	'v':      true,
+	'w':      true,
+	'x':      true,
+	'y':      true,
+	'z':      true,
+	'{':      true,
+	'|':      true,
+	'}':      true,
+	'~':      true,
+	'\u007f': true,
+}
+
+// safeSet holds the value true if the ASCII character with the given array
+// position can be represented inside a JSON string without any further
+// escaping.
+//
+// All values are true except for the ASCII control characters (0-31), the
+// double quote ("), and the backslash character ("\").
+var safeSet = [utf8.RuneSelf]bool{
+	' ':      true,
+	'!':      true,
+	'"':      false,
+	'#':      true,
+	'$':      true,
+	'%':      true,
+	'&':      true,
+	'\'':     true,
+	'(':      true,
+	')':      true,
+	'*':      true,
+	'+':      true,
+	',':      true,
+	'-':      true,
+	'.':      true,
+	'/':      true,
+	'0':      true,
+	'1':      true,
+	'2':      true,
+	'3':      true,
+	'4':      true,
+	'5':      true,
+	'6':      true,
+	'7':      true,
+	'8':      true,
+	'9':      true,
+	':':      true,
+	';':      true,
+	'<':      true,
+	'=':      true,
+	'>':      true,
+	'?':      true,
+	'@':      true,
+	'A':      true,
+	'B':      true,
+	'C':      true,
+	'D':      true,
+	'E':      true,
+	'F':      true,
+	'G':      true,
+	'H':      true,
+	'I':      true,
+	'J':      true,
+	'K':      true,
+	'L':      true,
+	'M':      true,
+	'N':      true,
+	'O':      true,
+	'P':      true,
+	'Q':      true,
+	'R':      true,
+	'S':      true,
+	'T':      true,
+	'U':      true,
+	'V':      true,
+	'W':      true,
+	'X':      true,
+	'Y':      true,
+	'Z':      true,
+	'[':      true,
+	'\\':     false,
+	']':      true,
+	'^':      true,
+	'_':      true,
+	'`':      true,
+	'a':      true,
+	'b':      true,
+	'c':      true,
+	'd':      true,
+	'e':      true,
+	'f':      true,
+	'g':      true,
+	'h':      true,
+	'i':      true,
+	'j':      true,
+	'k':      true,
+	'l':      true,
+	'm':      true,
+	'n':      true,
+	'o':      true,
+	'p':      true,
+	'q':      true,
+	'r':      true,
+	's':      true,
+	't':      true,
+	'u':      true,
+	'v':      true,
+	'w':      true,
+	'x':      true,
+	'y':      true,
+	'z':      true,
+	'{':      true,
+	'|':      true,
+	'}':      true,
+	'~':      true,
+	'\u007f': true,
+}
+
+var hex = "0123456789abcdef"
+
+func (stream *Stream) WriteStringWithHtmlEscaped(s string) {
+	stream.ensure(32)
+	valLen := len(s)
+	toWriteLen := valLen
+	bufLengthMinusTwo := len(stream.buf) - 2 // make room for the quotes
+	if stream.n+toWriteLen > bufLengthMinusTwo {
+		toWriteLen = bufLengthMinusTwo - stream.n
+	}
+	n := stream.n
+	stream.buf[n] = '"'
+	n++
+	// write string, the fast path, without utf8 and escape support
+	i := 0
+	for ; i < toWriteLen; i++ {
+		c := s[i]
+		if c <= utf8.RuneSelf && htmlSafeSet[c] {
+			stream.buf[n] = c
+			n++
+		} else {
+			break
+		}
+	}
+	if i == valLen {
+		stream.buf[n] = '"'
+		n++
+		stream.n = n
+		return
+	}
+	stream.n = n
+	writeStringSlowPath(stream, htmlSafeSet, i, s, valLen)
+}
+
+func (stream *Stream) WriteString(s string) {
+	stream.ensure(32)
+	valLen := len(s)
+	toWriteLen := valLen
+	bufLengthMinusTwo := len(stream.buf) - 2 // make room for the quotes
+	if stream.n+toWriteLen > bufLengthMinusTwo {
+		toWriteLen = bufLengthMinusTwo - stream.n
+	}
+	n := stream.n
+	stream.buf[n] = '"'
+	n++
+	// write string, the fast path, without utf8 and escape support
+	i := 0
+	for ; i < toWriteLen; i++ {
+		c := s[i]
+		if c > 31 && c != '"' && c != '\\' {
+			stream.buf[n] = c
+			n++
+		} else {
+			break
+		}
+	}
+	if i == valLen {
+		stream.buf[n] = '"'
+		n++
+		stream.n = n
+		return
+	}
+	stream.n = n
+	writeStringSlowPath(stream, safeSet, i, s, valLen)
+}
+
+func writeStringSlowPath(stream *Stream, safeSet [utf8.RuneSelf]bool, i int, s string, valLen int) {
+	start := i
+	// for the remaining parts, we process them char by char
+	for ; i < valLen; i++ {
+		if b := s[i]; b < utf8.RuneSelf {
+			if safeSet[b] {
+				i++
+				continue
+			}
+			if start < i {
+				stream.WriteRaw(s[start:i])
+			}
+			switch b {
+			case '\\', '"':
+				stream.writeTwoBytes('\\', b)
+			case '\n':
+				stream.writeTwoBytes('\\', 'n')
+			case '\r':
+				stream.writeTwoBytes('\\', 'r')
+			case '\t':
+				stream.writeTwoBytes('\\', 't')
+			default:
+				// This encodes bytes < 0x20 except for \t, \n and \r.
+				// If escapeHTML is set, it also escapes <, >, and &
+				// because they can lead to security holes when
+				// user-controlled strings are rendered into JSON
+				// and served to some browsers.
+				stream.WriteRaw(`\u00`)
+				stream.writeTwoBytes(hex[b>>4], hex[b&0xF])
+			}
+			i++
+			start = i
+			continue
+		}
+		c, size := utf8.DecodeRuneInString(s[i:])
+		if c == utf8.RuneError && size == 1 {
+			if start < i {
+				stream.WriteRaw(s[start:i])
+			}
+			stream.WriteRaw(`\ufffd`)
+			i += size
+			start = i
+			continue
+		}
+		// U+2028 is LINE SEPARATOR.
+		// U+2029 is PARAGRAPH SEPARATOR.
+		// They are both technically valid characters in JSON strings,
+		// but don't work in JSONP, which has to be evaluated as JavaScript,
+		// and can lead to security holes there. It is valid JSON to
+		// escape them, so we do so unconditionally.
+		// See http://timelessrepo.com/json-isnt-a-javascript-subset for discussion.
+		if c == '\u2028' || c == '\u2029' {
+			if start < i {
+				stream.WriteRaw(s[start:i])
+			}
+			stream.WriteRaw(`\u202`)
+			stream.writeByte(hex[c&0xF])
+			i += size
+			start = i
+			continue
+		}
+		i += size
+	}
+	if start < len(s) {
+		stream.WriteRaw(s[start:])
+	}
+	stream.writeByte('"')
+}

jsoniter.go

@@ -1,916 +0,0 @@
-package jsoniter
-
-import (
-	"io"
-	"fmt"
-	"unicode/utf16"
-	"strconv"
-	"unsafe"
-	"encoding/base64"
-)
-
-type ValueType int
-
-const (
-	Invalid ValueType = iota
-	String
-	Number
-	Null
-	Bool
-	Array
-	Object
-)
-
-var digits []byte
-var valueTypes []ValueType
-
-func init() {
-	digits = make([]byte, 256)
-	for i := 0; i < len(digits); i++ {
-		digits[i] = 255
-	}
-	for i := '0'; i <= '9'; i++ {
-		digits[i] = byte(i - '0');
-	}
-	for i := 'a'; i <= 'f'; i++ {
-		digits[i] = byte((i - 'a') + 10);
-	}
-	for i := 'A'; i <= 'F'; i++ {
-		digits[i] = byte((i - 'A') + 10);
-	}
-	valueTypes = make([]ValueType, 256)
-	for i := 0; i < len(valueTypes); i++ {
-		valueTypes[i] = Invalid
-	}
-	valueTypes['"'] = String;
-	valueTypes['-'] = Number;
-	valueTypes['0'] = Number;
-	valueTypes['1'] = Number;
-	valueTypes['2'] = Number;
-	valueTypes['3'] = Number;
-	valueTypes['4'] = Number;
-	valueTypes['5'] = Number;
-	valueTypes['6'] = Number;
-	valueTypes['7'] = Number;
-	valueTypes['8'] = Number;
-	valueTypes['9'] = Number;
-	valueTypes['t'] = Bool;
-	valueTypes['f'] = Bool;
-	valueTypes['n'] = Null;
-	valueTypes['['] = Array;
-	valueTypes['{'] = Object;
-}
-
-type Iterator struct {
-	reader io.Reader
-	buf    []byte
-	head   int
-	tail   int
-	Error  error
-}
-
-func Parse(reader io.Reader, bufSize int) *Iterator {
-	iter := &Iterator{
-		reader: reader,
-		buf: make([]byte, bufSize),
-		head: 0,
-		tail: 0,
-	}
-	iter.skipWhitespaces()
-	return iter
-}
-
-func ParseBytes(input []byte) *Iterator {
-	iter := &Iterator{
-		reader: nil,
-		buf: input,
-		head: 0,
-		tail: len(input),
-	}
-	iter.skipWhitespaces()
-	return iter
-}
-
-func ParseString(input string) *Iterator {
-	return ParseBytes([]byte(input))
-}
-
-func (iter *Iterator) Reset(reader io.Reader) *Iterator {
-	iter.reader = reader
-	iter.head = 0
-	iter.tail = 0
-	iter.skipWhitespaces()
-	return iter
-}
-
-func (iter *Iterator) ResetBytes(input []byte) *Iterator {
-	// only for benchmarking
-	iter.reader = nil
-	iter.Error = nil
-	iter.buf = input
-	iter.head = 0
-	iter.tail = len(input)
-	iter.skipWhitespaces()
-	return iter
-}
-
-func (iter *Iterator) WhatIsNext() ValueType {
-	valueType := valueTypes[iter.readByte()];
-	iter.unreadByte();
-	return valueType;
-}
-
-func (iter *Iterator) skipWhitespaces() {
-	for {
-		for i := iter.head; i < iter.tail; i++ {
-			c := iter.buf[i]
-			switch c {
-			case ' ', '\n', '\t', '\r':
-				continue
-			}
-			iter.head = i
-			return
-		}
-		if !iter.loadMore() {
-			return
-		}
-	}
-}
-
-func (iter *Iterator) skipWhitespacesWithoutLoadMore() bool {
-	for i := iter.head; i < iter.tail; i++ {
-		c := iter.buf[i]
-		switch c {
-		case ' ', '\n', '\t', '\r':
-			continue
-		}
-		iter.head = i
-		return false
-	}
-	return true
-}
-
-func (iter *Iterator) nextToken() byte {
-	// a variation of skip whitespaces, returning the next non-whitespace token
-	for {
-		for i := iter.head; i < iter.tail; i++ {
-			c := iter.buf[i]
-			switch c {
-			case ' ', '\n', '\t', 'r':
-				continue
-			}
-			iter.head = i+1
-			return c
-		}
-		if !iter.loadMore() {
-			return 0
-		}
-	}
-}
-
-func (iter *Iterator) ReportError(operation string, msg string) {
-	if iter.Error != nil {
-		return
-	}
-	peekStart := iter.head - 10
-	if peekStart < 0 {
-		peekStart = 0
-	}
-	iter.Error = fmt.Errorf("%s: %s, parsing %v ...%s... at %s", operation, msg, iter.head,
-		string(iter.buf[peekStart: iter.head]), string(iter.buf[0:iter.tail]))
-}
-
-func (iter *Iterator) CurrentBuffer() string {
-	peekStart := iter.head - 10
-	if peekStart < 0 {
-		peekStart = 0
-	}
-	return fmt.Sprintf("parsing %v ...|%s|... at %s", iter.head,
-		string(iter.buf[peekStart: iter.head]), string(iter.buf[0:iter.tail]))
-}
-
-func (iter *Iterator) readByte() (ret byte) {
-	if iter.head == iter.tail {
-		if iter.loadMore() {
-			ret = iter.buf[iter.head]
-			iter.head++
-			return ret
-		} else {
-			return 0
-		}
-	}
-	ret = iter.buf[iter.head]
-	iter.head++
-	return ret
-}
-
-func (iter *Iterator) loadMore() bool {
-	if iter.reader == nil {
-		iter.Error = io.EOF
-		return false
-	}
-	for {
-		n, err := iter.reader.Read(iter.buf)
-		if n == 0 {
-			if err != nil {
-				iter.Error = err
-				return false
-			} else {
-				// n == 0, err == nil is not EOF
-				continue
-			}
-		} else {
-			iter.head = 0
-			iter.tail = n
-			return true
-		}
-	}
-}
-
-func (iter *Iterator) unreadByte() {
-	if iter.head == 0 {
-		iter.ReportError("unreadByte", "unread too many bytes")
-		return
-	}
-	iter.head -= 1
-	return
-}
-
-const maxUint64 = (1 << 64 - 1)
-const cutoffUint64 = maxUint64 / 10 + 1
-const maxUint32 = (1 << 32 - 1)
-const cutoffUint32 = maxUint32 / 10 + 1
-
-func (iter *Iterator) ReadUint() (ret uint) {
-	val := iter.ReadUint64()
-	converted := uint(val)
-	if uint64(converted) != val {
-		iter.ReportError("ReadUint", "int overflow")
-		return
-	}
-	return converted
-}
-
-func (iter *Iterator) ReadUint8() (ret uint8) {
-	val := iter.ReadUint64()
-	converted := uint8(val)
-	if uint64(converted) != val {
-		iter.ReportError("ReadUint8", "int overflow")
-		return
-	}
-	return converted
-}
-
-func (iter *Iterator) ReadUint16() (ret uint16) {
-	val := iter.ReadUint64()
-	converted := uint16(val)
-	if uint64(converted) != val {
-		iter.ReportError("ReadUint16", "int overflow")
-		return
-	}
-	return converted
-}
-
-func (iter *Iterator) ReadUint32() (ret uint32) {
-	val := iter.ReadUint64()
-	converted := uint32(val)
-	if uint64(converted) != val {
-		iter.ReportError("ReadUint32", "int overflow")
-		return
-	}
-	return converted
-}
-
-func (iter *Iterator) ReadUint64() (ret uint64) {
-	c := iter.readByte()
-	v := digits[c]
-	if v == 0 {
-		return 0 // single zero
-	}
-	if v == 255 {
-		iter.ReportError("ReadUint64", "unexpected character")
-		return
-	}
-	for {
-		if ret >= cutoffUint64 {
-			iter.ReportError("ReadUint64", "overflow")
-			return
-		}
-		ret = ret * 10 + uint64(v)
-		c = iter.readByte()
-		v = digits[c]
-		if v == 255 {
-			iter.unreadByte()
-			break
-		}
-	}
-	return ret
-}
-
-func (iter *Iterator) ReadInt() (ret int) {
-	val := iter.ReadInt64()
-	converted := int(val)
-	if int64(converted) != val {
-		iter.ReportError("ReadInt", "int overflow")
-		return
-	}
-	return converted
-}
-
-func (iter *Iterator) ReadInt8() (ret int8) {
-	val := iter.ReadInt64()
-	converted := int8(val)
-	if int64(converted) != val {
-		iter.ReportError("ReadInt8", "int overflow")
-		return
-	}
-	return converted
-}
-
-func (iter *Iterator) ReadInt16() (ret int16) {
-	val := iter.ReadInt64()
-	converted := int16(val)
-	if int64(converted) != val {
-		iter.ReportError("ReadInt16", "int overflow")
-		return
-	}
-	return converted
-}
-
-func (iter *Iterator) ReadInt32() (ret int32) {
-	val := iter.ReadInt64()
-	converted := int32(val)
-	if int64(converted) != val {
-		iter.ReportError("ReadInt32", "int overflow")
-		return
-	}
-	return converted
-}
-
-func (iter *Iterator) ReadInt64() (ret int64) {
-	c := iter.readByte()
-	if iter.Error != nil {
-		return
-	}
-
-	/* optional leading minus */
-	if c == '-' {
-		n := iter.ReadUint64()
-		return -int64(n)
-	} else {
-		iter.unreadByte()
-		n := iter.ReadUint64()
-		return int64(n)
-	}
-}
-
-func (iter *Iterator) ReadString() (ret string) {
-	return string(iter.readStringAsBytes())
-}
-
-
-func (iter *Iterator) readStringAsBytes() (ret []byte) {
-	c := iter.readByte()
-	if c == 'n' {
-		iter.skipUntilBreak()
-		return
-	}
-	if c != '"' {
-		iter.ReportError("ReadString", `expects " or n`)
-		return
-	}
-	end := iter.findStringEndWithoutEscape()
-	if end != -1 {
-		// fast path: reuse the underlying buffer
-		ret = iter.buf[iter.head:end-1]
-		iter.head = end
-		return ret
-	}
-	str := make([]byte, 0, 8)
-	for iter.Error == nil {
-		c = iter.readByte()
-		if c == '"' {
-			return str
-		}
-		if c == '\\' {
-			c = iter.readByte()
-			if iter.Error != nil {
-				return
-			}
-			switch c {
-			case 'u':
-				r := iter.readU4()
-				if iter.Error != nil {
-					return
-				}
-				if utf16.IsSurrogate(r) {
-					c = iter.readByte()
-					if iter.Error != nil {
-						return
-					}
-					if c != '\\' {
-						iter.ReportError("ReadString",
-							`expects \u after utf16 surrogate, but \ not found`)
-						return
-					}
-					c = iter.readByte()
-					if iter.Error != nil {
-						return
-					}
-					if c != 'u' {
-						iter.ReportError("ReadString",
-							`expects \u after utf16 surrogate, but \u not found`)
-						return
-					}
-					r2 := iter.readU4()
-					if iter.Error != nil {
-						return
-					}
-					combined := utf16.DecodeRune(r, r2)
-					str = appendRune(str, combined)
-				} else {
-					str = appendRune(str, r)
-				}
-			case '"':
-				str = append(str, '"')
-			case '\\':
-				str = append(str, '\\')
-			case '/':
-				str = append(str, '/')
-			case 'b':
-				str = append(str, '\b')
-			case 'f':
-				str = append(str, '\f')
-			case 'n':
-				str = append(str, '\n')
-			case 'r':
-				str = append(str, '\r')
-			case 't':
-				str = append(str, '\t')
-			default:
-				iter.ReportError("ReadString",
-					`invalid escape char after \`)
-				return
-			}
-		} else {
-			str = append(str, c)
-		}
-	}
-	return
-}
-
-func (iter *Iterator) readU4() (ret rune) {
-	for i := 0; i < 4; i++ {
-		c := iter.readByte()
-		if iter.Error != nil {
-			return
-		}
-		if (c >= '0' && c <= '9') {
-			if ret >= cutoffUint32 {
-				iter.ReportError("readU4", "overflow")
-				return
-			}
-			ret = ret * 16 + rune(c - '0')
-		} else if ((c >= 'a' && c <= 'f') ) {
-			if ret >= cutoffUint32 {
-				iter.ReportError("readU4", "overflow")
-				return
-			}
-			ret = ret * 16 + rune(c - 'a' + 10)
-		} else {
-			iter.ReportError("readU4", "expects 0~9 or a~f")
-			return
-		}
-	}
-	return ret
-}
-
-const (
-	t1 = 0x00 // 0000 0000
-	tx = 0x80 // 1000 0000
-	t2 = 0xC0 // 1100 0000
-	t3 = 0xE0 // 1110 0000
-	t4 = 0xF0 // 1111 0000
-	t5 = 0xF8 // 1111 1000
-
-	maskx = 0x3F // 0011 1111
-	mask2 = 0x1F // 0001 1111
-	mask3 = 0x0F // 0000 1111
-	mask4 = 0x07 // 0000 0111
-
-	rune1Max = 1 << 7 - 1
-	rune2Max = 1 << 11 - 1
-	rune3Max = 1 << 16 - 1
-
-	surrogateMin = 0xD800
-	surrogateMax = 0xDFFF
-
-	MaxRune = '\U0010FFFF' // Maximum valid Unicode code point.
-	RuneError = '\uFFFD'     // the "error" Rune or "Unicode replacement character"
-)
-
-func appendRune(p []byte, r rune) []byte {
-	// Negative values are erroneous. Making it unsigned addresses the problem.
-	switch i := uint32(r); {
-	case i <= rune1Max:
-		p = append(p, byte(r))
-		return p
-	case i <= rune2Max:
-		p = append(p, t2 | byte(r >> 6))
-		p = append(p, tx | byte(r) & maskx)
-		return p
-	case i > MaxRune, surrogateMin <= i && i <= surrogateMax:
-		r = RuneError
-		fallthrough
-	case i <= rune3Max:
-		p = append(p, t3 | byte(r >> 12))
-		p = append(p, tx | byte(r >> 6) & maskx)
-		p = append(p, tx | byte(r) & maskx)
-		return p
-	default:
-		p = append(p, t4 | byte(r >> 18))
-		p = append(p, tx | byte(r >> 12) & maskx)
-		p = append(p, tx | byte(r >> 6) & maskx)
-		p = append(p, tx | byte(r) & maskx)
-		return p
-	}
-}
-
-func (iter *Iterator) ReadArray() (ret bool) {
-	c := iter.nextToken()
-	if iter.Error != nil {
-		return
-	}
-	switch c {
-	case 'n': {
-		iter.skipUntilBreak()
-		return false // null
-	}
-	case '[': {
-		c = iter.nextToken()
-		if iter.Error != nil {
-			return
-		}
-		if c == ']' {
-			return false
-		} else {
-			iter.unreadByte()
-			return true
-		}
-	}
-	case ']': return false
-	case ',':
-		iter.skipWhitespaces()
-		return true
-	default:
-		iter.ReportError("ReadArray", "expect [ or , or ] or n")
-		return
-	}
-}
-
-func (iter *Iterator) ReadObject() (ret string) {
-	c := iter.nextToken()
-	if iter.Error != nil {
-		return
-	}
-	switch c {
-	case 'n': {
-		iter.skipUntilBreak()
-		if iter.Error != nil {
-			return
-		}
-		return "" // null
-	}
-	case '{': {
-		c = iter.nextToken()
-		if iter.Error != nil {
-			return
-		}
-		switch c {
-		case '}':
-			return "" // end of object
-		case '"':
-			iter.unreadByte()
-			return iter.readObjectField()
-		default:
-			iter.ReportError("ReadObject", `expect " after {`)
-			return
-		}
-	}
-	case ',':
-		iter.skipWhitespaces()
-		return iter.readObjectField()
-	case '}':
-		return "" // end of object
-	default:
-		iter.ReportError("ReadObject", `expect { or , or } or n`)
-		return
-	}
-}
-
-func (iter *Iterator) readObjectField() (ret string) {
-	str := iter.readStringAsBytes()
-	if iter.skipWhitespacesWithoutLoadMore() {
-		if ret == "" {
-			ret = string(str);
-		}
-		if !iter.loadMore() {
-			return
-		}
-	}
-	if iter.buf[iter.head] != ':' {
-		iter.ReportError("ReadObject", "expect : after object field")
-		return
-	}
-	iter.head++
-	if iter.skipWhitespacesWithoutLoadMore() {
-		if ret == "" {
-			ret = string(str);
-		}
-		if !iter.loadMore() {
-			return
-		}
-	}
-	if ret == "" {
-		return *(*string)(unsafe.Pointer(&str))
-	}
-	return ret
-}
-
-func (iter *Iterator) ReadFloat32() (ret float32) {
-	strBuf := [8]byte{}
-	str := strBuf[0:0]
-	hasMore := true
-	for(hasMore) {
-		for i := iter.head; i < iter.tail; i++ {
-			c := iter.buf[i]
-			switch c {
-			case '-', '+', '.', 'e', 'E', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
-				str = append(str, c)
-				continue
-			default:
-				hasMore = false
-				break
-			}
-		}
-		if hasMore {
-			if !iter.loadMore() {
-				break
-			}
-		}
-	}
-	if iter.Error != nil && iter.Error != io.EOF {
-		return
-	}
-	val, err := strconv.ParseFloat(*(*string)(unsafe.Pointer(&str)), 32)
-	if err != nil {
-		iter.Error = err
-		return
-	}
-	return float32(val)
-}
-
-func (iter *Iterator) ReadFloat64() (ret float64) {
-	strBuf := [8]byte{}
-	str := strBuf[0:0]
-	hasMore := true
-	for(hasMore) {
-		for i := iter.head; i < iter.tail; i++ {
-			c := iter.buf[i]
-			switch c {
-			case '-', '+', '.', 'e', 'E', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
-				str = append(str, c)
-				continue
-			default:
-				hasMore = false
-				break
-			}
-		}
-		if hasMore {
-			if !iter.loadMore() {
-				break
-			}
-		}
-	}
-	if iter.Error != nil && iter.Error != io.EOF {
-		return
-	}
-	val, err := strconv.ParseFloat(*(*string)(unsafe.Pointer(&str)), 64)
-	if err != nil {
-		iter.Error = err
-		return
-	}
-	return val
-}
-
-func (iter *Iterator) ReadBool() (ret bool) {
-	c := iter.readByte()
-	if iter.Error != nil {
-		return
-	}
-	switch c {
-	case 't':
-		iter.skipUntilBreak()
-		return true
-	case 'f':
-		iter.skipUntilBreak()
-		return false
-	default:
-		iter.ReportError("ReadBool", "expect t or f")
-		return
-	}
-}
-
-func (iter *Iterator) ReadBase64() (ret []byte) {
-	src := iter.readStringAsBytes()
-	if iter.Error != nil {
-		return
-	}
-	b64 := base64.StdEncoding
-	ret = make([]byte, b64.DecodedLen(len(src)))
-	n, err := b64.Decode(ret, src)
-	if err != nil {
-		iter.Error = err
-		return
-	}
-	return ret[:n]
-}
-
-func (iter *Iterator) ReadNull() (ret bool) {
-	c := iter.readByte()
-	if c == 'n' {
-		iter.skipUntilBreak()
-		return true
-	}
-	iter.unreadByte()
-	return false
-}
-
-func (iter *Iterator) Skip() {
-	c := iter.readByte()
-	switch c {
-	case '"':
-		iter.skipString()
-	case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 't', 'f', 'n':
-		iter.skipUntilBreak()
-	case '[':
-		iter.skipArray()
-	case '{':
-		iter.skipObject()
-	default:
-		iter.ReportError("Skip", fmt.Sprintf("do not know how to skip: %v", c))
-		return
-	}
-}
-
-func (iter *Iterator) skipString() {
-	for {
-		end, escaped := iter.findStringEnd()
-		if end == -1 {
-			if !iter.loadMore() {
-				return
-			}
-			if escaped {
-				iter.head = 1 // skip the first char as last char read is \
-			}
-		} else {
-			iter.head = end
-			return
-		}
-	}
-}
-
-
-// adapted from: https://github.com/buger/jsonparser/blob/master/parser.go
-// Tries to find the end of string
-// Support if string contains escaped quote symbols.
-func (iter *Iterator) findStringEnd() (int, bool) {
-	escaped := false
-	for i := iter.head; i < iter.tail; i++ {
-		c := iter.buf[i]
-		if c == '"' {
-			if !escaped {
-				return i + 1, false
-			} else {
-				j := i - 1
-				for {
-					if j < iter.head || iter.buf[j] != '\\' {
-						// even number of backslashes
-						// either end of buffer, or " found
-						return i + 1, true
-					}
-					j--
-					if j < iter.head || iter.buf[j] != '\\' {
-						// odd number of backslashes
-						// it is \" or \\\"
-						break
-					}
-					j--
-				}
-			}
-		} else if c == '\\' {
-			escaped = true
-		}
-	}
-	j := iter.tail - 1
-	for {
-		if j < iter.head || iter.buf[j] != '\\' {
-			// even number of backslashes
-			// either end of buffer, or " found
-			return -1, false // do not end with \
-		}
-		j--
-		if j < iter.head || iter.buf[j] != '\\' {
-			// odd number of backslashes
-			// it is \" or \\\"
-			break
-		}
-		j--
-
-	}
-	return -1, true // end with \
-}
-
-
-func (iter *Iterator) findStringEndWithoutEscape() int {
-	for i := iter.head; i < iter.tail; i++ {
-		c := iter.buf[i]
-		if c == '"' {
-			return i + 1
-		} else if c == '\\' {
-			return -1
-		}
-	}
-	return -1
-}
-
-func (iter *Iterator) skipArray() {
-	level := 1
-	for {
-		for i := iter.head; i < iter.tail; i++ {
-			switch iter.buf[i] {
-			case '"': // If inside string, skip it
-				iter.head = i + 1
-				iter.skipString()
-				i = iter.head - 1 // it will be i++ soon
-			case '[': // If open symbol, increase level
-				level++
-			case ']': // If close symbol, increase level
-				level--
-
-				// If we have returned to the original level, we're done
-				if level == 0 {
-					iter.head = i + 1
-					return
-				}
-			}
-		}
-		if (!iter.loadMore()) {
-			return
-		}
-	}
-}
-
-func (iter *Iterator) skipObject() {
-	level := 1
-	for {
-		for i := iter.head; i < iter.tail; i++ {
-			switch iter.buf[i] {
-			case '"': // If inside string, skip it
-				iter.head = i + 1
-				iter.skipString()
-				i = iter.head - 1 // it will be i++ soon
-			case '{': // If open symbol, increase level
-				level++
-			case '}': // If close symbol, increase level
-				level--
-
-				// If we have returned to the original level, we're done
-				if level == 0 {
-					iter.head = i + 1
-					return
-				}
-			}
-		}
-		if (!iter.loadMore()) {
-			return
-		}
-	}
-}
-
-func (iter *Iterator) skipUntilBreak() {
-	// true, false, null, number
-	for {
-		for i := iter.head; i < iter.tail; i++ {
-			c := iter.buf[i]
-			switch c {
-			case ' ', '\n', '\r', '\t', ',', '}', ']':
-				iter.head = i
-				return
-			}
-		}
-		if (!iter.loadMore()) {
-			return
-		}
-	}
-}

jsoniter_adapter.go

@@ -1,14 +0,0 @@
-package jsoniter
-
-import "io"
-
-// adapt to json/encoding api
-
-func Unmarshal(data []byte, v interface{}) error {
-	iter := ParseBytes(data)
-	iter.Read(v)
-	if iter.Error == io.EOF {
-		return nil
-	}
-	return iter.Error
-}

jsoniter_adapter_test.go

@@ -0,0 +1,62 @@
+package jsoniter
+
+import (
+	"bytes"
+	"encoding/json"
+	"github.com/json-iterator/go/require"
+	"io/ioutil"
+	"testing"
+)
+
+func Test_new_decoder(t *testing.T) {
+	should := require.New(t)
+	decoder1 := json.NewDecoder(bytes.NewBufferString(`[1][2]`))
+	decoder2 := NewDecoder(bytes.NewBufferString(`[1][2]`))
+	arr1 := []int{}
+	should.Nil(decoder1.Decode(&arr1))
+	should.Equal([]int{1}, arr1)
+	arr2 := []int{}
+	should.True(decoder1.More())
+	buffered, _ := ioutil.ReadAll(decoder1.Buffered())
+	should.Equal("[2]", string(buffered))
+	should.Nil(decoder2.Decode(&arr2))
+	should.Equal([]int{1}, arr2)
+	should.True(decoder2.More())
+	buffered, _ = ioutil.ReadAll(decoder2.Buffered())
+	should.Equal("[2]", string(buffered))
+
+	should.Nil(decoder1.Decode(&arr1))
+	should.Equal([]int{2}, arr1)
+	should.False(decoder1.More())
+	should.Nil(decoder2.Decode(&arr2))
+	should.Equal([]int{2}, arr2)
+	should.False(decoder2.More())
+}
+
+func Test_new_encoder(t *testing.T) {
+	should := require.New(t)
+	buf1 := &bytes.Buffer{}
+	encoder1 := json.NewEncoder(buf1)
+	encoder1.SetEscapeHTML(false)
+	encoder1.Encode([]int{1})
+	should.Equal("[1]\n", buf1.String())
+	buf2 := &bytes.Buffer{}
+	encoder2 := NewEncoder(buf2)
+	encoder2.SetEscapeHTML(false)
+	encoder2.Encode([]int{1})
+	should.Equal("[1]", buf2.String())
+}
+
+func Test_use_number(t *testing.T) {
+	should := require.New(t)
+	decoder1 := json.NewDecoder(bytes.NewBufferString(`123`))
+	decoder1.UseNumber()
+	decoder2 := NewDecoder(bytes.NewBufferString(`123`))
+	decoder2.UseNumber()
+	var obj1 interface{}
+	should.Nil(decoder1.Decode(&obj1))
+	should.Equal(json.Number("123"), obj1)
+	var obj2 interface{}
+	should.Nil(decoder2.Decode(&obj2))
+	should.Equal(json.Number("123"), obj2)
+}

jsoniter_any_test.go

@@ -1,39 +0,0 @@
-package jsoniter
-
-import (
-	"testing"
-	"fmt"
-)
-
-func Test_read_string_as_any(t *testing.T) {
-	iter := ParseString(`[1, {"hello": "world"}, 2]`)
-	any := iter.ReadAny()
-	if any.ToString(1, "hello") != "world" {
-		t.FailNow()
-	}
-}
-
-func Test_read_float64_as_any(t *testing.T) {
-	iter := ParseString(`1.23`)
-	any := iter.ReadAny()
-	if any.ToFloat32() != 1.23 {
-		t.FailNow()
-	}
-}
-
-func Test_read_int_as_any(t *testing.T) {
-	iter := ParseString(`123`)
-	any := iter.ReadAny()
-	if any.ToFloat32() != 123 {
-		t.FailNow()
-	}
-}
-
-func Test_read_any_from_nested(t *testing.T) {
-	iter := ParseString(`{"numbers": ["1", "2", ["3", "4"]]}`)
-	val := iter.ReadAny()
-	if val.ToInt("numbers", 2, 0) != 3 {
-		fmt.Println(val.Error)
-		t.FailNow()
-	}
-}

jsoniter_array_test.go

@@ -1,65 +1,158 @@
 package jsoniter
 
 import (
-	"testing"
+	"bytes"
 	"encoding/json"
+	"github.com/json-iterator/go/require"
+	"io"
+	"testing"
 )
 
 func Test_empty_array(t *testing.T) {
-	iter := ParseString(`[]`)
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `[]`)
 	cont := iter.ReadArray()
-	if cont != false {
-		t.FailNow()
-	}
+	should.False(cont)
+	iter = ParseString(ConfigOfDefault, `[]`)
+	iter.ReadArrayCB(func(iter *Iterator) bool {
+		should.FailNow("should not call")
+		return true
+	})
 }
 
 func Test_one_element(t *testing.T) {
-	iter := ParseString(`[1]`)
-	cont := iter.ReadArray()
-	if cont != true {
-		t.FailNow()
-	}
-	if iter.ReadInt64() != 1 {
-		t.FailNow()
-	}
-	cont = iter.ReadArray()
-	if cont != false {
-		t.FailNow()
-	}
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `[1]`)
+	should.True(iter.ReadArray())
+	should.Equal(1, iter.ReadInt())
+	should.False(iter.ReadArray())
+	iter = ParseString(ConfigOfDefault, `[1]`)
+	iter.ReadArrayCB(func(iter *Iterator) bool {
+		should.Equal(1, iter.ReadInt())
+		return true
+	})
 }
 
 func Test_two_elements(t *testing.T) {
-	iter := ParseString(`[1,2]`)
-	cont := iter.ReadArray()
-	if cont != true {
-		t.FailNow()
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `[1,2]`)
+	should.True(iter.ReadArray())
+	should.Equal(int64(1), iter.ReadInt64())
+	should.True(iter.ReadArray())
+	should.Equal(int64(2), iter.ReadInt64())
+	should.False(iter.ReadArray())
+	iter = ParseString(ConfigOfDefault, `[1,2]`)
+	should.Equal([]interface{}{float64(1), float64(2)}, iter.Read())
 }
-	if iter.ReadInt64() != 1 {
-		t.FailNow()
+
+func Test_read_empty_array_as_any(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString("[]")
+	should.Nil(err)
+	should.Equal(0, any.Size())
 }
-	cont = iter.ReadArray()
-	if cont != true {
-		t.FailNow()
+
+func Test_read_one_element_array_as_any(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString("[1]")
+	should.Nil(err)
+	should.Equal(1, any.Size())
 }
-	if iter.ReadInt64() != 2 {
-		t.FailNow()
+
+func Test_read_two_element_array_as_any(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString("[1,2]")
+	should.Nil(err)
+	should.Equal(1, any.Get(0).ToInt())
+	should.Equal(2, any.Size())
+	should.True(any.ToBool())
+	should.Equal(1, any.ToInt())
 }
-	cont = iter.ReadArray()
-	if cont != false {
-		t.FailNow()
+
+func Test_read_array_with_any_iterator(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString("[1,2]")
+	should.Nil(err)
+	var element Any
+	var elements []int
+	for next, hasNext := any.IterateArray(); hasNext; {
+		element, hasNext = next()
+		elements = append(elements, element.ToInt())
 	}
+	should.Equal([]int{1, 2}, elements)
+}
+
+func Test_wrap_array(t *testing.T) {
+	should := require.New(t)
+	any := Wrap([]int{1, 2, 3})
+	should.Equal("[1,2,3]", any.ToString())
+	var element Any
+	var elements []int
+	for next, hasNext := any.IterateArray(); hasNext; {
+		element, hasNext = next()
+		elements = append(elements, element.ToInt())
+	}
+	should.Equal([]int{1, 2, 3}, elements)
+	any = Wrap([]int{1, 2, 3})
+	should.Equal(3, any.Size())
+	any = Wrap([]int{1, 2, 3})
+	should.Equal(2, any.Get(1).ToInt())
+}
+
+func Test_array_lazy_any_get(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString("[1,[2,3],4]")
+	should.Nil(err)
+	should.Equal(3, any.Get(1, 1).ToInt())
+	should.Equal("[1,[2,3],4]", any.ToString())
+}
+
+func Test_array_lazy_any_get_all(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString("[[1],[2],[3,4]]")
+	should.Nil(err)
+	should.Equal("[1,2,3]", any.Get('*', 0).ToString())
+}
+
+func Test_array_wrapper_any_get_all(t *testing.T) {
+	should := require.New(t)
+	any := wrapArray([][]int{
+		{1, 2},
+		{3, 4},
+		{5, 6},
+	})
+	should.Equal("[1,3,5]", any.Get('*', 0).ToString())
+}
+
+func Test_array_lazy_any_get_invalid(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString("[]")
+	should.Nil(err)
+	should.Equal(Invalid, any.Get(1, 1).ValueType())
+	should.NotNil(any.Get(1, 1).LastError())
+	should.Equal(Invalid, any.Get("1").ValueType())
+	should.NotNil(any.Get("1").LastError())
+}
+
+func Test_array_lazy_any_set(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString("[1,[2,3],4]")
+	should.Nil(err)
+	any.GetArray()[0] = WrapInt64(2)
+	str, err := MarshalToString(any)
+	should.Nil(err)
+	should.Equal("[2,[2,3],4]", str)
 }
 
 func Test_invalid_array(t *testing.T) {
-	iter := ParseString(`[`)
-	iter.ReadArray()
-	if iter.Error == nil {
+	_, err := UnmarshalAnyFromString("[")
+	if err == nil || err == io.EOF {
 		t.FailNow()
 	}
 }
 
 func Test_whitespace_in_head(t *testing.T) {
-	iter := ParseString(` [1]`)
+	iter := ParseString(ConfigOfDefault, ` [1]`)
 	cont := iter.ReadArray()
 	if cont != true {
 		t.FailNow()
@@ -70,7 +163,7 @@ func Test_whitespace_in_head(t *testing.T) {
 }
 
 func Test_whitespace_after_array_start(t *testing.T) {
-	iter := ParseString(`[ 1]`)
+	iter := ParseString(ConfigOfDefault, `[ 1]`)
 	cont := iter.ReadArray()
 	if cont != true {
 		t.FailNow()
@@ -81,7 +174,7 @@ func Test_whitespace_after_array_start(t *testing.T) {
 }
 
 func Test_whitespace_before_array_end(t *testing.T) {
-	iter := ParseString(`[1 ]`)
+	iter := ParseString(ConfigOfDefault, `[1 ]`)
 	cont := iter.ReadArray()
 	if cont != true {
 		t.FailNow()
@@ -96,7 +189,7 @@ func Test_whitespace_before_array_end(t *testing.T) {
 }
 
 func Test_whitespace_before_comma(t *testing.T) {
-	iter := ParseString(`[1 ,2]`)
+	iter := ParseString(ConfigOfDefault, `[1 ,2]`)
 	cont := iter.ReadArray()
 	if cont != true {
 		t.FailNow()
@@ -117,10 +210,84 @@ func Test_whitespace_before_comma(t *testing.T) {
 	}
 }
 
+func Test_write_array(t *testing.T) {
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(Config{IndentionStep: 2}.Froze(), buf, 4096)
+	stream.WriteArrayStart()
+	stream.WriteInt(1)
+	stream.WriteMore()
+	stream.WriteInt(2)
+	stream.WriteArrayEnd()
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("[\n  1,\n  2\n]", buf.String())
+}
+
+func Test_write_val_array(t *testing.T) {
+	should := require.New(t)
+	val := []int{1, 2, 3}
+	str, err := MarshalToString(&val)
+	should.Nil(err)
+	should.Equal("[1,2,3]", str)
+}
+
+func Test_write_val_empty_array(t *testing.T) {
+	should := require.New(t)
+	val := []int{}
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal("[]", str)
+}
+
+func Test_write_array_of_interface_in_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field  []interface{}
+		Field2 string
+	}
+	val := TestObject{[]interface{}{1, 2}, ""}
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Contains(str, `"Field":[1,2]`)
+	should.Contains(str, `"Field2":""`)
+}
+
+func Test_json_RawMessage(t *testing.T) {
+	should := require.New(t)
+	var data json.RawMessage
+	should.Nil(Unmarshal([]byte(`[1,2,3]`), &data))
+	should.Equal(`[1,2,3]`, string(data))
+	str, err := MarshalToString(data)
+	should.Nil(err)
+	should.Equal(`[1,2,3]`, str)
+}
+
+func Test_encode_byte_array(t *testing.T) {
+	should := require.New(t)
+	bytes, err := json.Marshal([]byte{1, 2, 3})
+	should.Nil(err)
+	should.Equal(`"AQID"`, string(bytes))
+	bytes, err = Marshal([]byte{1, 2, 3})
+	should.Nil(err)
+	should.Equal(`"AQID"`, string(bytes))
+}
+
+func Test_decode_byte_array(t *testing.T) {
+	should := require.New(t)
+	data := []byte{}
+	err := json.Unmarshal([]byte(`"AQID"`), &data)
+	should.Nil(err)
+	should.Equal([]byte{1, 2, 3}, data)
+	err = Unmarshal([]byte(`"AQID"`), &data)
+	should.Nil(err)
+	should.Equal([]byte{1, 2, 3}, data)
+}
+
 func Benchmark_jsoniter_array(b *testing.B) {
 	b.ReportAllocs()
 	input := []byte(`[1,2,3,4,5,6,7,8,9]`)
-	iter := ParseBytes(input)
+	iter := ParseBytes(ConfigOfDefault, input)
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
 		iter.ResetBytes(input)

jsoniter_bool_test.go

@@ -1,17 +1,49 @@
 package jsoniter
 
-import "testing"
+import (
+	"bytes"
+	"github.com/json-iterator/go/require"
+	"testing"
+)
 
 func Test_true(t *testing.T) {
-	iter := ParseString(`true`)
-	if iter.ReadBool() != true {
-		t.FailNow()
-	}
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `true`)
+	should.True(iter.ReadBool())
+	iter = ParseString(ConfigOfDefault, `true`)
+	should.Equal(true, iter.Read())
 }
 
 func Test_false(t *testing.T) {
-	iter := ParseString(`false`)
-	if iter.ReadBool() != false {
-		t.FailNow()
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `false`)
+	should.False(iter.ReadBool())
 }
+
+func Test_read_bool_as_any(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString("true")
+	should.Nil(err)
+	should.True(any.ToBool())
+}
+
+func Test_write_true_false(t *testing.T) {
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 4096)
+	stream.WriteTrue()
+	stream.WriteFalse()
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("truefalse", buf.String())
+}
+
+func Test_write_val_bool(t *testing.T) {
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 4096)
+	stream.WriteVal(true)
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("true", buf.String())
 }

jsoniter_customize_test.go

@@ -1,11 +1,13 @@
 package jsoniter
 
 import (
+	"encoding/json"
+	"github.com/json-iterator/go/require"
+	"reflect"
+	"strconv"
 	"testing"
 	"time"
 	"unsafe"
-	"strconv"
-	"reflect"
 )
 
 func Test_customize_type_decoder(t *testing.T) {
@@ -17,7 +19,7 @@ func Test_customize_type_decoder(t *testing.T) {
 		}
 		*((*time.Time)(ptr)) = t
 	})
-	defer ClearDecoders()
+	defer ConfigOfDefault.CleanDecoders()
 	val := time.Time{}
 	err := Unmarshal([]byte(`"2016-12-05 08:43:28"`), &val)
 	if err != nil {
@@ -29,6 +31,41 @@ func Test_customize_type_decoder(t *testing.T) {
 	}
 }
 
+func Test_customize_type_encoder(t *testing.T) {
+	should := require.New(t)
+	RegisterTypeEncoder("time.Time", func(ptr unsafe.Pointer, stream *Stream) {
+		t := *((*time.Time)(ptr))
+		stream.WriteString(t.UTC().Format("2006-01-02 15:04:05"))
+	})
+	defer ConfigOfDefault.CleanEncoders()
+	val := time.Unix(0, 0)
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`"1970-01-01 00:00:00"`, str)
+}
+
+func Test_customize_byte_array_encoder(t *testing.T) {
+	ConfigOfDefault.CleanEncoders()
+	should := require.New(t)
+	RegisterTypeEncoder("[]uint8", func(ptr unsafe.Pointer, stream *Stream) {
+		t := *((*[]byte)(ptr))
+		stream.WriteString(string(t))
+	})
+	defer ConfigOfDefault.CleanEncoders()
+	val := []byte("abc")
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`"abc"`, str)
+}
+
+func Test_customize_float_marshal(t *testing.T) {
+	should := require.New(t)
+	json := Config{MarshalFloatWith6Digits: true}.Froze()
+	str, err := json.MarshalToString(float32(1.23456789))
+	should.Nil(err)
+	should.Equal("1.234568", str)
+}
+
 type Tom struct {
 	field1 string
 }
@@ -37,7 +74,7 @@ func Test_customize_field_decoder(t *testing.T) {
 	RegisterFieldDecoder("jsoniter.Tom", "field1", func(ptr unsafe.Pointer, iter *Iterator) {
 		*((*string)(ptr)) = strconv.Itoa(iter.ReadInt())
 	})
-	defer ClearDecoders()
+	defer ConfigOfDefault.CleanDecoders()
 	tom := Tom{}
 	err := Unmarshal([]byte(`{"field1": 100}`), &tom)
 	if err != nil {
@@ -45,21 +82,134 @@ func Test_customize_field_decoder(t *testing.T) {
 	}
 }
 
-func Test_customize_field_decoder_factory(t *testing.T) {
-	RegisterFieldCustomizer(func(type_ reflect.Type, field *reflect.StructField) ([]string, DecoderFunc) {
-		if (type_.String() == "jsoniter.Tom" && field.Name == "field1") {
-			return []string{"field-1"}, func(ptr unsafe.Pointer, iter *Iterator) {
+type TestObject1 struct {
+	field1 string
+}
+
+func Test_customize_field_by_extension(t *testing.T) {
+	should := require.New(t)
+	RegisterExtension(func(type_ reflect.Type, field *reflect.StructField) ([]string, EncoderFunc, DecoderFunc) {
+		if type_.String() == "jsoniter.TestObject1" && field.Name == "field1" {
+			encode := func(ptr unsafe.Pointer, stream *Stream) {
+				str := *((*string)(ptr))
+				val, _ := strconv.Atoi(str)
+				stream.WriteInt(val)
+			}
+			decode := func(ptr unsafe.Pointer, iter *Iterator) {
 				*((*string)(ptr)) = strconv.Itoa(iter.ReadInt())
 			}
+			return []string{"field-1"}, encode, decode
 		}
-		return nil, nil
+		return nil, nil, nil
 	})
-	tom := Tom{}
-	err := Unmarshal([]byte(`{"field-1": 100}`), &tom)
-	if err != nil {
-		t.Fatal(err)
+	obj := TestObject1{}
+	err := UnmarshalFromString(`{"field-1": 100}`, &obj)
+	should.Nil(err)
+	should.Equal("100", obj.field1)
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Equal(`{"field-1":100}`, str)
 }
-	if tom.field1 != "100" {
-		t.Fatal(tom.field1)
+
+func Test_unexported_fields(t *testing.T) {
+	jsoniter := Config{SupportUnexportedStructFields: true}.Froze()
+	should := require.New(t)
+	type TestObject struct {
+		field1 string
+		field2 string `json:"field-2"`
 	}
+	obj := TestObject{}
+	obj.field1 = "hello"
+	should.Nil(jsoniter.UnmarshalFromString(`{}`, &obj))
+	should.Equal("hello", obj.field1)
+	should.Nil(jsoniter.UnmarshalFromString(`{"field1": "world", "field-2": "abc"}`, &obj))
+	should.Equal("world", obj.field1)
+	should.Equal("abc", obj.field2)
+	str, err := jsoniter.MarshalToString(obj)
+	should.Nil(err)
+	should.Contains(str, `"field-2":"abc"`)
+}
+
+type ObjectImplementedMarshaler int
+
+func (obj *ObjectImplementedMarshaler) MarshalJSON() ([]byte, error) {
+	return []byte(`"hello"`), nil
+}
+
+func Test_marshaler(t *testing.T) {
+	type TestObject struct {
+		Field *ObjectImplementedMarshaler
+	}
+	should := require.New(t)
+	val := ObjectImplementedMarshaler(100)
+	obj := TestObject{&val}
+	bytes, err := json.Marshal(obj)
+	should.Nil(err)
+	should.Equal(`{"Field":"hello"}`, string(bytes))
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Equal(`{"Field":"hello"}`, str)
+}
+
+func Test_marshaler_and_encoder(t *testing.T) {
+	type TestObject struct {
+		Field *ObjectImplementedMarshaler
+	}
+	should := require.New(t)
+	RegisterTypeEncoder("jsoniter.ObjectImplementedMarshaler", func(ptr unsafe.Pointer, stream *Stream) {
+		stream.WriteString("hello from encoder")
+	})
+	val := ObjectImplementedMarshaler(100)
+	obj := TestObject{&val}
+	bytes, err := json.Marshal(obj)
+	should.Nil(err)
+	should.Equal(`{"Field":"hello"}`, string(bytes))
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Equal(`{"Field":"hello from encoder"}`, str)
+}
+
+type ObjectImplementedUnmarshaler int
+
+func (obj *ObjectImplementedUnmarshaler) UnmarshalJSON([]byte) error {
+	*obj = 100
+	return nil
+}
+
+func Test_unmarshaler(t *testing.T) {
+	type TestObject struct {
+		Field  *ObjectImplementedUnmarshaler
+		Field2 string
+	}
+	should := require.New(t)
+	obj := TestObject{}
+	val := ObjectImplementedUnmarshaler(0)
+	obj.Field = &val
+	err := json.Unmarshal([]byte(`{"Field":"hello"}`), &obj)
+	should.Nil(err)
+	should.Equal(100, int(*obj.Field))
+	err = Unmarshal([]byte(`{"Field":"hello"}`), &obj)
+	should.Nil(err)
+	should.Equal(100, int(*obj.Field))
+}
+
+func Test_unmarshaler_and_decoder(t *testing.T) {
+	type TestObject struct {
+		Field  *ObjectImplementedUnmarshaler
+		Field2 string
+	}
+	should := require.New(t)
+	RegisterTypeDecoder("jsoniter.ObjectImplementedUnmarshaler", func(ptr unsafe.Pointer, iter *Iterator) {
+		*(*ObjectImplementedUnmarshaler)(ptr) = 10
+		iter.Skip()
+	})
+	obj := TestObject{}
+	val := ObjectImplementedUnmarshaler(0)
+	obj.Field = &val
+	err := json.Unmarshal([]byte(`{"Field":"hello"}`), &obj)
+	should.Nil(err)
+	should.Equal(100, int(*obj.Field))
+	err = Unmarshal([]byte(`{"Field":"hello"}`), &obj)
+	should.Nil(err)
+	should.Equal(10, int(*obj.Field))
 }

jsoniter_demo_test.go

@@ -1,25 +1,22 @@
 package jsoniter
 
 import (
-	"testing"
+	"encoding/json"
 	"fmt"
+	"github.com/json-iterator/go/require"
+	"testing"
 )
 
 func Test_bind_api_demo(t *testing.T) {
-	iter := ParseString(`[0,1,2,3]`)
+	should := require.New(t)
 	val := []int{}
-	iter.Read(&val)
-	fmt.Println(val[3])
-}
-
-func Test_any_api_demo(t *testing.T) {
-	iter := ParseString(`[0,1,2,3]`)
-	val := iter.ReadAny()
-	fmt.Println(val.Get(3))
+	err := UnmarshalFromString(`[0,1,2,3]  `, &val)
+	should.Nil(err)
+	should.Equal([]int{0, 1, 2, 3}, val)
 }
 
 func Test_iterator_api_demo(t *testing.T) {
-	iter := ParseString(`[0,1,2,3]`)
+	iter := ParseString(ConfigOfDefault, `[0,1,2,3]`)
 	total := 0
 	for iter.ReadArray() {
 		total += iter.ReadInt()
@@ -27,30 +24,63 @@ func Test_iterator_api_demo(t *testing.T) {
 	fmt.Println(total)
 }
 
-type ABC struct {
-	a Any
+type People struct {
+	Name    string
+	Gender  string
+	Age     int
+	Address string
+	Mobile  string
+	Country string
+	Height  int
 }
 
-func Test_deep_nested_any_api(t *testing.T) {
-	iter := ParseString(`{"a": {"b": {"c": "d"}}}`)
-	abc := &ABC{}
-	iter.Read(&abc)
-	fmt.Println(abc.a.Get("b", "c"))
+func jsoniterMarshal(p *People) error {
+	_, err := Marshal(p)
+	if nil != err {
+		return err
+	}
+	return nil
+}
+func stdMarshal(p *People) error {
+	_, err := json.Marshal(p)
+	if nil != err {
+		return err
+	}
+	return nil
 }
 
-type User struct {
-	userId int
-	name string
-	tags []string
+func BenchmarkJosniterMarshal(b *testing.B) {
+	var p People
+	p.Address = "上海市徐汇区漕宝路"
+	p.Age = 30
+	p.Country = "中国"
+	p.Gender = "male"
+	p.Height = 170
+	p.Mobile = "18502120533"
+	p.Name = "Elvin"
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		err := jsoniterMarshal(&p)
+		if nil != err {
+			b.Error(err)
+		}
+	}
 }
 
-func Test_iterator_and_bind_api(t *testing.T) {
-	iter := ParseString(`[123, {"name": "taowen", "tags": ["crazy", "hacker"]}]`)
-	user := User{}
-	iter.ReadArray()
-	user.userId = iter.ReadInt()
-	iter.ReadArray()
-	iter.Read(&user)
-	iter.ReadArray() // array end
-	fmt.Println(user)
+func BenchmarkStdMarshal(b *testing.B) {
+	var p People
+	p.Address = "上海市徐汇区漕宝路"
+	p.Age = 30
+	p.Country = "中国"
+	p.Gender = "male"
+	p.Height = 170
+	p.Mobile = "18502120533"
+	p.Name = "Elvin"
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		err := stdMarshal(&p)
+		if nil != err {
+			b.Error(err)
+		}
+	}
 }

jsoniter_find_end_test.go

@@ -1,61 +1,62 @@
 package jsoniter
 
 import (
-	"testing"
+	"github.com/json-iterator/go/require"
 	"io"
+	"testing"
 )
 
 func Test_string_end(t *testing.T) {
-	end, escaped := ParseString(`abc"`).findStringEnd()
+	end, escaped := ParseString(ConfigOfDefault, `abc"`).findStringEnd()
 	if end != 4 {
 		t.Fatal(end)
 	}
 	if escaped != false {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(`abc\\"`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `abc\\"`).findStringEnd()
 	if end != 6 {
 		t.Fatal(end)
 	}
 	if escaped != true {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(`abc\\\\"`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `abc\\\\"`).findStringEnd()
 	if end != 8 {
 		t.Fatal(end)
 	}
 	if escaped != true {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(`abc\"`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `abc\"`).findStringEnd()
 	if end != -1 {
 		t.Fatal(end)
 	}
 	if escaped != false {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(`abc\`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `abc\`).findStringEnd()
 	if end != -1 {
 		t.Fatal(end)
 	}
 	if escaped != true {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(`abc\\`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `abc\\`).findStringEnd()
 	if end != -1 {
 		t.Fatal(end)
 	}
 	if escaped != false {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(`\\`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `\\`).findStringEnd()
 	if end != -1 {
 		t.Fatal(end)
 	}
 	if escaped != false {
 		t.Fatal(escaped)
 	}
-	end, escaped = ParseString(`\`).findStringEnd()
+	end, escaped = ParseString(ConfigOfDefault, `\`).findStringEnd()
 	if end != -1 {
 		t.Fatal(end)
 	}
@@ -89,66 +90,55 @@ func (reader *StagedReader) Read(p []byte) (n int, err error) {
 }
 
 func Test_skip_string(t *testing.T) {
-	iter := ParseString(`"abc`)
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `"abc`)
 	iter.skipString()
-	if iter.head != 1 {
-		t.Fatal(iter.head)
-	}
-	iter = ParseString(`\""abc`)
+	should.Equal(1, iter.head)
+	iter = ParseString(ConfigOfDefault, `\""abc`)
 	iter.skipString()
-	if iter.head != 3 {
-		t.Fatal(iter.head)
-	}
+	should.Equal(3, iter.head)
 	reader := &StagedReader{
 		r1: `abc`,
 		r2: `"`,
 	}
-	iter = Parse(reader, 4096)
+	iter = Parse(ConfigOfDefault, reader, 4096)
 	iter.skipString()
-	if iter.head != 1 {
-		t.Fatal(iter.head)
-	}
+	should.Equal(1, iter.head)
 	reader = &StagedReader{
 		r1: `abc`,
 		r2: `1"`,
 	}
-	iter = Parse(reader, 4096)
+	iter = Parse(ConfigOfDefault, reader, 4096)
 	iter.skipString()
-	if iter.head != 2 {
-		t.Fatal(iter.head)
-	}
+	should.Equal(2, iter.head)
 	reader = &StagedReader{
 		r1: `abc\`,
 		r2: `"`,
 	}
-	iter = Parse(reader, 4096)
+	iter = Parse(ConfigOfDefault, reader, 4096)
 	iter.skipString()
-	if iter.Error != io.EOF {
-		t.Fatal(iter.Error)
-	}
+	should.NotNil(iter.Error)
 	reader = &StagedReader{
 		r1: `abc\`,
 		r2: `""`,
 	}
-	iter = Parse(reader, 4096)
+	iter = Parse(ConfigOfDefault, reader, 4096)
 	iter.skipString()
-	if iter.head != 2 {
-		t.Fatal(iter.head)
-	}
+	should.Equal(2, iter.head)
 }
 
 func Test_skip_object(t *testing.T) {
-	iter := ParseString(`}`)
+	iter := ParseString(ConfigOfDefault, `}`)
 	iter.skipObject()
 	if iter.head != 1 {
 		t.Fatal(iter.head)
 	}
-	iter = ParseString(`a}`)
+	iter = ParseString(ConfigOfDefault, `a}`)
 	iter.skipObject()
 	if iter.head != 2 {
 		t.Fatal(iter.head)
 	}
-	iter = ParseString(`{}}a`)
+	iter = ParseString(ConfigOfDefault, `{}}a`)
 	iter.skipObject()
 	if iter.head != 3 {
 		t.Fatal(iter.head)
@@ -157,12 +147,12 @@ func Test_skip_object(t *testing.T) {
 		r1: `{`,
 		r2: `}}a`,
 	}
-	iter = Parse(reader, 4096)
+	iter = Parse(ConfigOfDefault, reader, 4096)
 	iter.skipObject()
 	if iter.head != 2 {
 		t.Fatal(iter.head)
 	}
-	iter = ParseString(`"}"}a`)
+	iter = ParseString(ConfigOfDefault, `"}"}a`)
 	iter.skipObject()
 	if iter.head != 4 {
 		t.Fatal(iter.head)

jsoniter_float_test.go

@@ -1,40 +1,182 @@
 package jsoniter
 
 import (
-	"testing"
+	"bytes"
 	"encoding/json"
 	"fmt"
+	"github.com/json-iterator/go/require"
+	"strconv"
+	"testing"
 )
 
-func Test_float64_0(t *testing.T) {
-	iter := ParseString(`0`)
-	val := iter.ReadFloat64()
-	if val != 0 {
-		t.Fatal(val)
+func Test_read_big_float(t *testing.T) {
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `12.3`)
+	val := iter.ReadBigFloat()
+	val64, _ := val.Float64()
+	should.Equal(12.3, val64)
+}
+
+func Test_read_big_int(t *testing.T) {
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `92233720368547758079223372036854775807`)
+	val := iter.ReadBigInt()
+	should.NotNil(val)
+	should.Equal(`92233720368547758079223372036854775807`, val.String())
+}
+
+func Test_read_float(t *testing.T) {
+	inputs := []string{`1.1`, `1000`, `9223372036854775807`, `12.3`, `-12.3`, `720368.54775807`, `720368.547758075`}
+	for _, input := range inputs {
+		// non-streaming
+		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
+			should := require.New(t)
+			iter := ParseString(ConfigOfDefault, input+",")
+			expected, err := strconv.ParseFloat(input, 32)
+			should.Nil(err)
+			should.Equal(float32(expected), iter.ReadFloat32())
+		})
+		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
+			should := require.New(t)
+			iter := ParseString(ConfigOfDefault, input+",")
+			expected, err := strconv.ParseFloat(input, 64)
+			should.Nil(err)
+			should.Equal(expected, iter.ReadFloat64())
+		})
+		// streaming
+		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
+			should := require.New(t)
+			iter := Parse(ConfigOfDefault, bytes.NewBufferString(input+","), 2)
+			expected, err := strconv.ParseFloat(input, 32)
+			should.Nil(err)
+			should.Equal(float32(expected), iter.ReadFloat32())
+		})
+		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
+			should := require.New(t)
+			iter := Parse(ConfigOfDefault, bytes.NewBufferString(input+","), 2)
+			expected, err := strconv.ParseFloat(input, 64)
+			should.Nil(err)
+			should.Equal(expected, iter.ReadFloat64())
+		})
 	}
 }
 
-func Test_float64_1_dot_1(t *testing.T) {
-	iter := ParseString(`1.1`)
-	val := iter.ReadFloat64()
-	if val != 1.1 {
-		t.Fatal(val)
-	}
+func Test_read_float_as_interface(t *testing.T) {
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `12.3`)
+	should.Equal(float64(12.3), iter.Read())
 }
 
-func Test_float32_1_dot_1_comma(t *testing.T) {
-	iter := ParseString(`1.1,`)
-	val := iter.ReadFloat32()
-	if val != 1.1 {
-		fmt.Println(iter.Error)
-		t.Fatal(val)
+func Test_read_float_as_any(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString("12.3")
+	should.Nil(err)
+	should.Equal(float64(12.3), any.ToFloat64())
+	should.Equal("12.3", any.ToString())
+	should.True(any.ToBool())
 }
+
+func Test_wrap_float(t *testing.T) {
+	should := require.New(t)
+	str, err := MarshalToString(WrapFloat64(12.3))
+	should.Nil(err)
+	should.Equal("12.3", str)
+}
+
+func Test_write_float32(t *testing.T) {
+	vals := []float32{0, 1, -1, 99, 0xff, 0xfff, 0xffff, 0xfffff, 0xffffff, 0x4ffffff, 0xfffffff,
+		-0x4ffffff, -0xfffffff, 1.2345, 1.23456, 1.234567, 1.001}
+	for _, val := range vals {
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteFloat32Lossy(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatFloat(float64(val), 'f', -1, 32), buf.String())
+		})
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteVal(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatFloat(float64(val), 'f', -1, 32), buf.String())
+		})
+	}
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 10)
+	stream.WriteRaw("abcdefg")
+	stream.WriteFloat32Lossy(1.123456)
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("abcdefg1.123456", buf.String())
+}
+
+func Test_write_float64(t *testing.T) {
+	vals := []float64{0, 1, -1, 99, 0xff, 0xfff, 0xffff, 0xfffff, 0xffffff, 0x4ffffff, 0xfffffff,
+		-0x4ffffff, -0xfffffff, 1.2345, 1.23456, 1.234567, 1.001}
+	for _, val := range vals {
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteFloat64Lossy(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatFloat(val, 'f', -1, 64), buf.String())
+		})
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteVal(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatFloat(val, 'f', -1, 64), buf.String())
+		})
+	}
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 10)
+	stream.WriteRaw("abcdefg")
+	stream.WriteFloat64Lossy(1.123456)
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("abcdefg1.123456", buf.String())
+}
+
+func Test_read_float64_cursor(t *testing.T) {
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, "[1.23456789\n,2,3]")
+	should.True(iter.ReadArray())
+	should.Equal(1.23456789, iter.Read())
+	should.True(iter.ReadArray())
+	should.Equal(float64(2), iter.Read())
+}
+
+func Test_read_float_scientific(t *testing.T) {
+	should := require.New(t)
+	var obj interface{}
+	should.Nil(UnmarshalFromString(`1e1`, &obj))
+	should.Equal(float64(10), obj)
+	should.Nil(json.Unmarshal([]byte(`1e1`), &obj))
+	should.Equal(float64(10), obj)
+	should.Nil(UnmarshalFromString(`1.0e1`, &obj))
+	should.Equal(float64(10), obj)
+	should.Nil(json.Unmarshal([]byte(`1.0e1`), &obj))
+	should.Equal(float64(10), obj)
 }
 
 func Benchmark_jsoniter_float(b *testing.B) {
 	b.ReportAllocs()
+	input := []byte(`1.1123,`)
+	iter := NewIterator(ConfigOfDefault)
 	for n := 0; n < b.N; n++ {
-		iter := ParseString(`1.1111111111`)
+		iter.ResetBytes(input)
 		iter.ReadFloat64()
 	}
 }

jsoniter_int_test.go

@@ -1,76 +1,456 @@
 package jsoniter
 
 import (
-	"testing"
 	"bytes"
 	"encoding/json"
+	"fmt"
+	"github.com/json-iterator/go/require"
+	"io"
+	"io/ioutil"
+	"strconv"
+	"testing"
 )
 
-func Test_uint64_0(t *testing.T) {
-	iter := Parse(bytes.NewBufferString("0"), 4096)
-	val := iter.ReadUint64()
-	if iter.Error != nil {
-		t.Fatal(iter.Error)
-	}
-	if val != 0 {
-		t.Fatal(val)
-	}
-}
-
-func Test_uint64_1(t *testing.T) {
-	iter := Parse(bytes.NewBufferString("1"), 4096)
-	val := iter.ReadUint64()
-	if val != 1 {
-		t.Fatal(val)
-	}
-}
-
-func Test_uint64_100(t *testing.T) {
-	iter := Parse(bytes.NewBufferString("100"), 4096)
-	val := iter.ReadUint64()
-	if val != 100 {
-		t.Fatal(val)
-	}
-}
-
-func Test_uint64_100_comma(t *testing.T) {
-	iter := Parse(bytes.NewBufferString("100,"), 4096)
-	val := iter.ReadUint64()
-	if iter.Error != nil {
-		t.Fatal(iter.Error)
-	}
-	if val != 100 {
-		t.Fatal(val)
-	}
-}
-
-func Test_uint64_invalid(t *testing.T) {
-	iter := Parse(bytes.NewBufferString(","), 4096)
+func Test_read_uint64_invalid(t *testing.T) {
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, ",")
 	iter.ReadUint64()
-	if iter.Error == nil {
-		t.FailNow()
+	should.NotNil(iter.Error)
+}
+
+func Test_read_int8(t *testing.T) {
+	inputs := []string{`127`, `-128`}
+	for _, input := range inputs {
+		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
+			should := require.New(t)
+			iter := ParseString(ConfigOfDefault, input)
+			expected, err := strconv.ParseInt(input, 10, 8)
+			should.Nil(err)
+			should.Equal(int8(expected), iter.ReadInt8())
+		})
 	}
 }
 
-func Test_int64_100(t *testing.T) {
-	iter := Parse(bytes.NewBufferString("100"), 4096)
-	val := iter.ReadInt64()
-	if val != 100 {
-		t.Fatal(val)
+func Test_read_int16(t *testing.T) {
+	inputs := []string{`32767`, `-32768`}
+	for _, input := range inputs {
+		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
+			should := require.New(t)
+			iter := ParseString(ConfigOfDefault, input)
+			expected, err := strconv.ParseInt(input, 10, 16)
+			should.Nil(err)
+			should.Equal(int16(expected), iter.ReadInt16())
+		})
 	}
 }
 
-func Test_int64_minus_100(t *testing.T) {
-	iter := Parse(bytes.NewBufferString("-100"), 4096)
-	val := iter.ReadInt64()
-	if val != -100 {
-		t.Fatal(val)
+func Test_read_int32(t *testing.T) {
+	inputs := []string{`1`, `12`, `123`, `1234`, `12345`, `123456`, `2147483647`, `-2147483648`}
+	for _, input := range inputs {
+		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
+			should := require.New(t)
+			iter := ParseString(ConfigOfDefault, input)
+			expected, err := strconv.ParseInt(input, 10, 32)
+			should.Nil(err)
+			should.Equal(int32(expected), iter.ReadInt32())
+		})
+		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
+			should := require.New(t)
+			iter := Parse(ConfigOfDefault, bytes.NewBufferString(input), 2)
+			expected, err := strconv.ParseInt(input, 10, 32)
+			should.Nil(err)
+			should.Equal(int32(expected), iter.ReadInt32())
+		})
+	}
+}
+
+func Test_read_int32_array(t *testing.T) {
+	should := require.New(t)
+	input := `[123,456,789]`
+	val := make([]int32, 0)
+	UnmarshalFromString(input, &val)
+	should.Equal(3, len(val))
+}
+
+func Test_read_int64_array(t *testing.T) {
+	should := require.New(t)
+	input := `[123,456,789]`
+	val := make([]int64, 0)
+	UnmarshalFromString(input, &val)
+	should.Equal(3, len(val))
+}
+
+func Test_read_int32_overflow(t *testing.T) {
+	should := require.New(t)
+	input := "123456789123456789,"
+	iter := ParseString(ConfigOfDefault, input)
+	iter.ReadInt32()
+	should.NotNil(iter.Error)
+}
+
+func Test_read_int64(t *testing.T) {
+	inputs := []string{`1`, `12`, `123`, `1234`, `12345`, `123456`, `9223372036854775807`, `-9223372036854775808`}
+	for _, input := range inputs {
+		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
+			should := require.New(t)
+			iter := ParseString(ConfigOfDefault, input)
+			expected, err := strconv.ParseInt(input, 10, 64)
+			should.Nil(err)
+			should.Equal(expected, iter.ReadInt64())
+		})
+		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
+			should := require.New(t)
+			iter := Parse(ConfigOfDefault, bytes.NewBufferString(input), 2)
+			expected, err := strconv.ParseInt(input, 10, 64)
+			should.Nil(err)
+			should.Equal(expected, iter.ReadInt64())
+		})
+	}
+}
+
+func Test_read_int64_overflow(t *testing.T) {
+	should := require.New(t)
+	input := "123456789123456789123456789123456789,"
+	iter := ParseString(ConfigOfDefault, input)
+	iter.ReadInt64()
+	should.NotNil(iter.Error)
+}
+
+func Test_read_int64_as_any(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString("1234")
+	should.Nil(err)
+	should.Equal(1234, any.ToInt())
+	should.Equal(io.EOF, any.LastError())
+	should.Equal("1234", any.ToString())
+	should.True(any.ToBool())
+}
+
+func Test_int_lazy_any_get(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString("1234")
+	should.Nil(err)
+	should.Equal(Invalid, any.Get(1, "2").ValueType())
+}
+
+func Test_wrap_int(t *testing.T) {
+	should := require.New(t)
+	str, err := MarshalToString(WrapInt64(100))
+	should.Nil(err)
+	should.Equal("100", str)
+}
+
+func Test_write_uint8(t *testing.T) {
+	vals := []uint8{0, 1, 11, 111, 255}
+	for _, val := range vals {
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteUint8(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatUint(uint64(val), 10), buf.String())
+		})
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteVal(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatUint(uint64(val), 10), buf.String())
+		})
+	}
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 3)
+	stream.WriteRaw("a")
+	stream.WriteUint8(100) // should clear buffer
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("a100", buf.String())
+}
+
+func Test_write_int8(t *testing.T) {
+	vals := []int8{0, 1, -1, 99, 0x7f, -0x80}
+	for _, val := range vals {
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteInt8(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatInt(int64(val), 10), buf.String())
+		})
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteVal(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatInt(int64(val), 10), buf.String())
+		})
+	}
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 4)
+	stream.WriteRaw("a")
+	stream.WriteInt8(-100) // should clear buffer
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("a-100", buf.String())
+}
+
+func Test_write_uint16(t *testing.T) {
+	vals := []uint16{0, 1, 11, 111, 255, 0xfff, 0xffff}
+	for _, val := range vals {
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteUint16(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatUint(uint64(val), 10), buf.String())
+		})
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteVal(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatUint(uint64(val), 10), buf.String())
+		})
+	}
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 5)
+	stream.WriteRaw("a")
+	stream.WriteUint16(10000) // should clear buffer
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("a10000", buf.String())
+}
+
+func Test_write_int16(t *testing.T) {
+	vals := []int16{0, 1, 11, 111, 255, 0xfff, 0x7fff, -0x8000}
+	for _, val := range vals {
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteInt16(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatInt(int64(val), 10), buf.String())
+		})
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteVal(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatInt(int64(val), 10), buf.String())
+		})
+	}
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 6)
+	stream.WriteRaw("a")
+	stream.WriteInt16(-10000) // should clear buffer
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("a-10000", buf.String())
+}
+
+func Test_write_uint32(t *testing.T) {
+	vals := []uint32{0, 1, 11, 111, 255, 999999, 0xfff, 0xffff, 0xfffff, 0xffffff, 0xfffffff, 0xffffffff}
+	for _, val := range vals {
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteUint32(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatUint(uint64(val), 10), buf.String())
+		})
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteVal(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatUint(uint64(val), 10), buf.String())
+		})
+	}
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 10)
+	stream.WriteRaw("a")
+	stream.WriteUint32(0xffffffff) // should clear buffer
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("a4294967295", buf.String())
+}
+
+func Test_write_int32(t *testing.T) {
+	vals := []int32{0, 1, 11, 111, 255, 999999, 0xfff, 0xffff, 0xfffff, 0xffffff, 0xfffffff, 0x7fffffff, -0x80000000}
+	for _, val := range vals {
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteInt32(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatInt(int64(val), 10), buf.String())
+		})
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteVal(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatInt(int64(val), 10), buf.String())
+		})
+	}
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 11)
+	stream.WriteRaw("a")
+	stream.WriteInt32(-0x7fffffff) // should clear buffer
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("a-2147483647", buf.String())
+}
+
+func Test_write_uint64(t *testing.T) {
+	vals := []uint64{0, 1, 11, 111, 255, 999999, 0xfff, 0xffff, 0xfffff, 0xffffff, 0xfffffff, 0xffffffff,
+		0xfffffffff, 0xffffffffff, 0xfffffffffff, 0xffffffffffff, 0xfffffffffffff, 0xffffffffffffff,
+		0xfffffffffffffff, 0xffffffffffffffff}
+	for _, val := range vals {
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteUint64(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatUint(uint64(val), 10), buf.String())
+		})
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteVal(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatUint(uint64(val), 10), buf.String())
+		})
+	}
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 10)
+	stream.WriteRaw("a")
+	stream.WriteUint64(0xffffffff) // should clear buffer
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("a4294967295", buf.String())
+}
+
+func Test_write_int64(t *testing.T) {
+	vals := []int64{0, 1, 11, 111, 255, 999999, 0xfff, 0xffff, 0xfffff, 0xffffff, 0xfffffff, 0xffffffff,
+		0xfffffffff, 0xffffffffff, 0xfffffffffff, 0xffffffffffff, 0xfffffffffffff, 0xffffffffffffff,
+		0xfffffffffffffff, 0x7fffffffffffffff, -0x8000000000000000}
+	for _, val := range vals {
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteInt64(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatInt(val, 10), buf.String())
+		})
+		t.Run(fmt.Sprintf("%v", val), func(t *testing.T) {
+			should := require.New(t)
+			buf := &bytes.Buffer{}
+			stream := NewStream(ConfigOfDefault, buf, 4096)
+			stream.WriteVal(val)
+			stream.Flush()
+			should.Nil(stream.Error)
+			should.Equal(strconv.FormatInt(val, 10), buf.String())
+		})
+	}
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 10)
+	stream.WriteRaw("a")
+	stream.WriteInt64(0xffffffff) // should clear buffer
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("a4294967295", buf.String())
+}
+
+func Test_write_val_int(t *testing.T) {
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 4096)
+	stream.WriteVal(1001)
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("1001", buf.String())
+}
+
+func Test_write_val_int_ptr(t *testing.T) {
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 4096)
+	val := 1001
+	stream.WriteVal(&val)
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("1001", buf.String())
+}
+
+func Test_json_number(t *testing.T) {
+	should := require.New(t)
+	var arr []json.Number
+	err := Unmarshal([]byte(`[1]`), &arr)
+	should.Nil(err)
+	should.Equal(json.Number("1"), arr[0])
+	str, err := MarshalToString(arr)
+	should.Nil(err)
+	should.Equal(`[1]`, str)
+}
+
+func Benchmark_jsoniter_encode_int(b *testing.B) {
+	stream := NewStream(ConfigOfDefault, ioutil.Discard, 64)
+	for n := 0; n < b.N; n++ {
+		stream.n = 0
+		stream.WriteUint64(0xffffffff)
+	}
+}
+
+func Benchmark_itoa(b *testing.B) {
+	for n := 0; n < b.N; n++ {
+		strconv.FormatInt(0xffffffff, 10)
 	}
 }
 
 func Benchmark_jsoniter_int(b *testing.B) {
+	iter := NewIterator(ConfigOfDefault)
+	input := []byte(`100`)
 	for n := 0; n < b.N; n++ {
-		iter := ParseString(`-100`)
+		iter.ResetBytes(input)
 		iter.ReadInt64()
 	}
 }

jsoniter_interface_test.go

@@ -0,0 +1,154 @@
+package jsoniter
+
+import (
+	"encoding/json"
+	"github.com/json-iterator/go/require"
+	"testing"
+	"unsafe"
+)
+
+func Test_write_array_of_interface(t *testing.T) {
+	should := require.New(t)
+	array := []interface{}{"hello"}
+	str, err := MarshalToString(array)
+	should.Nil(err)
+	should.Equal(`["hello"]`, str)
+}
+
+func Test_write_map_of_interface(t *testing.T) {
+	should := require.New(t)
+	val := map[string]interface{}{"hello": "world"}
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`{"hello":"world"}`, str)
+}
+
+func Test_write_map_of_interface_in_struct(t *testing.T) {
+	type TestObject struct {
+		Field map[string]interface{}
+	}
+	should := require.New(t)
+	val := TestObject{map[string]interface{}{"hello": "world"}}
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`{"Field":{"hello":"world"}}`, str)
+}
+
+func Test_write_map_of_interface_in_struct_with_two_fields(t *testing.T) {
+	type TestObject struct {
+		Field  map[string]interface{}
+		Field2 string
+	}
+	should := require.New(t)
+	val := TestObject{map[string]interface{}{"hello": "world"}, ""}
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Contains(str, `"Field":{"hello":"world"}`)
+}
+
+type MyInterface interface {
+	Hello() string
+}
+
+type MyString string
+
+func (ms MyString) Hello() string {
+	return string(ms)
+}
+
+func Test_write_map_of_custom_interface(t *testing.T) {
+	should := require.New(t)
+	myStr := MyString("world")
+	should.Equal("world", myStr.Hello())
+	val := map[string]MyInterface{"hello": myStr}
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`{"hello":"world"}`, str)
+}
+
+func Test_write_interface(t *testing.T) {
+	should := require.New(t)
+	var val interface{}
+	val = "hello"
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`"hello"`, str)
+}
+
+func Test_read_interface(t *testing.T) {
+	should := require.New(t)
+	var val interface{}
+	err := UnmarshalFromString(`"hello"`, &val)
+	should.Nil(err)
+	should.Equal("hello", val)
+}
+
+func Test_read_custom_interface(t *testing.T) {
+	should := require.New(t)
+	var val MyInterface
+	RegisterTypeDecoder("jsoniter.MyInterface", func(ptr unsafe.Pointer, iter *Iterator) {
+		*((*MyInterface)(ptr)) = MyString(iter.ReadString())
+	})
+	err := UnmarshalFromString(`"hello"`, &val)
+	should.Nil(err)
+	should.Equal("hello", val.Hello())
+}
+
+func Test_decode_object_contain_empty_interface(t *testing.T) {
+	type TestObject struct {
+		Field interface{}
+	}
+	should := require.New(t)
+	obj := TestObject{}
+	obj.Field = 1024
+	should.Nil(UnmarshalFromString(`{"Field": "hello"}`, &obj))
+	should.Equal("hello", obj.Field)
+}
+
+func Test_decode_object_contain_non_empty_interface(t *testing.T) {
+	type TestObject struct {
+		Field MyInterface
+	}
+	should := require.New(t)
+	obj := TestObject{}
+	obj.Field = MyString("abc")
+	should.Nil(UnmarshalFromString(`{"Field": "hello"}`, &obj))
+	should.Equal(MyString("hello"), obj.Field)
+}
+
+func Test_encode_object_contain_empty_interface(t *testing.T) {
+	type TestObject struct {
+		Field interface{}
+	}
+	should := require.New(t)
+	obj := TestObject{}
+	obj.Field = 1024
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Equal(`{"Field":1024}`, str)
+}
+
+func Test_encode_object_contain_non_empty_interface(t *testing.T) {
+	type TestObject struct {
+		Field MyInterface
+	}
+	should := require.New(t)
+	obj := TestObject{}
+	obj.Field = MyString("hello")
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Equal(`{"Field":"hello"}`, str)
+}
+
+func Test_nil_non_empty_interface(t *testing.T) {
+	ConfigOfDefault.CleanEncoders()
+	ConfigOfDefault.CleanDecoders()
+	type TestObject struct {
+		Field []MyInterface
+	}
+	should := require.New(t)
+	obj := TestObject{}
+	b := []byte(`{"Field":["AAA"]}`)
+	should.NotNil(json.Unmarshal(b, &obj))
+	should.NotNil(Unmarshal(b, &obj))
+}

jsoniter_io_test.go

@@ -1,13 +1,13 @@
 package jsoniter
 
 import (
-	"testing"
 	"bytes"
 	"io"
+	"testing"
 )
 
 func Test_read_by_one(t *testing.T) {
-	iter := Parse(bytes.NewBufferString("abc"), 1)
+	iter := Parse(ConfigOfDefault, bytes.NewBufferString("abc"), 1)
 	b := iter.readByte()
 	if iter.Error != nil {
 		t.Fatal(iter.Error)
@@ -34,7 +34,7 @@ func Test_read_by_one(t *testing.T) {
 }
 
 func Test_read_by_two(t *testing.T) {
-	iter := Parse(bytes.NewBufferString("abc"), 2)
+	iter := Parse(ConfigOfDefault, bytes.NewBufferString("abc"), 2)
 	b := iter.readByte()
 	if iter.Error != nil {
 		t.Fatal(iter.Error)
@@ -67,7 +67,7 @@ func Test_read_by_two(t *testing.T) {
 }
 
 func Test_read_until_eof(t *testing.T) {
-	iter := Parse(bytes.NewBufferString("abc"), 2)
+	iter := Parse(ConfigOfDefault, bytes.NewBufferString("abc"), 2)
 	iter.readByte()
 	iter.readByte()
 	b := iter.readByte()

jsoniter_large_file_test.go

@@ -1,34 +1,33 @@
 package jsoniter
 
 import (
-	"testing"
-	"os"
 	"encoding/json"
 	"io/ioutil"
+	"os"
+	"testing"
 )
 
-func Test_large_file(t *testing.T) {
-	file, err := os.Open("/tmp/large-file.json")
-	if err != nil {
-		t.Fatal(err)
-	}
-	iter := Parse(file, 4096)
-	count := 0
-	for iter.ReadArray() {
-		iter.Skip()
-		count++
-	}
-	if count != 11351 {
-		t.Fatal(count)
-	}
-}
-
+//func Test_large_file(t *testing.T) {
+//	file, err := os.Open("/tmp/large-file.json")
+//	if err != nil {
+//		t.Fatal(err)
+//	}
+//	iter := Parse(file, 4096)
+//	count := 0
+//	for iter.ReadArray() {
+//		iter.Skip()
+//		count++
+//	}
+//	if count != 11351 {
+//		t.Fatal(count)
+//	}
+//}
 
 func Benchmark_jsoniter_large_file(b *testing.B) {
 	b.ReportAllocs()
 	for n := 0; n < b.N; n++ {
 		file, _ := os.Open("/tmp/large-file.json")
-		iter := Parse(file, 4096)
+		iter := Parse(ConfigOfDefault, file, 4096)
 		count := 0
 		for iter.ReadArray() {
 			iter.Skip()

jsoniter_map_test.go

@@ -1,38 +1,141 @@
 package jsoniter
 
 import (
+	"encoding/json"
+	"github.com/json-iterator/go/require"
+	"math/big"
 	"testing"
-	"reflect"
-	"fmt"
 )
 
 func Test_read_map(t *testing.T) {
-	iter := ParseString(`{"hello": "world"}`)
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `{"hello": "world"}`)
 	m := map[string]string{"1": "2"}
-	iter.Read(&m)
+	iter.ReadVal(&m)
 	copy(iter.buf, []byte{0, 0, 0, 0, 0, 0})
-	if !reflect.DeepEqual(map[string]string{"1": "2", "hello": "world"}, m) {
-		fmt.Println(iter.Error)
-		t.Fatal(m)
-	}
+	should.Equal(map[string]string{"1": "2", "hello": "world"}, m)
 }
 
 func Test_read_map_of_interface(t *testing.T) {
-	iter := ParseString(`{"hello": "world"}`)
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `{"hello": "world"}`)
 	m := map[string]interface{}{"1": "2"}
-	iter.Read(&m)
-	if !reflect.DeepEqual(map[string]interface{}{"1": "2", "hello": "world"}, m) {
-		fmt.Println(iter.Error)
-		t.Fatal(m)
+	iter.ReadVal(&m)
+	should.Equal(map[string]interface{}{"1": "2", "hello": "world"}, m)
+	iter = ParseString(ConfigOfDefault, `{"hello": "world"}`)
+	should.Equal(map[string]interface{}{"hello": "world"}, iter.Read())
+}
+
+func Test_wrap_map(t *testing.T) {
+	should := require.New(t)
+	any := Wrap(map[string]string{"Field1": "hello"})
+	should.Equal("hello", any.Get("Field1").ToString())
+	any = Wrap(map[string]string{"Field1": "hello"})
+	should.Equal(1, any.Size())
+	any = Wrap(map[string]string{"Field1": "hello"})
+	vals := map[string]string{}
+	var k string
+	var v Any
+	for next, hasNext := any.IterateObject(); hasNext; {
+		k, v, hasNext = next()
+		if v.ValueType() == String {
+			vals[k] = v.ToString()
+		}
+	}
+	should.Equal(map[string]string{"Field1": "hello"}, vals)
+}
+
+func Test_map_wrapper_any_get_all(t *testing.T) {
+	should := require.New(t)
+	any := Wrap(map[string][]int{"Field1": {1, 2}})
+	should.Equal(`{"Field1":1}`, any.Get('*', 0).ToString())
+}
+
+func Test_write_val_map(t *testing.T) {
+	should := require.New(t)
+	val := map[string]string{"1": "2"}
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`{"1":"2"}`, str)
+}
+
+func Test_slice_of_map(t *testing.T) {
+	should := require.New(t)
+	val := []map[string]string{{"1": "2"}}
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`[{"1":"2"}]`, str)
+	val = []map[string]string{}
+	should.Nil(UnmarshalFromString(str, &val))
+	should.Equal("2", val[0]["1"])
+}
+
+func Test_encode_int_key_map(t *testing.T) {
+	should := require.New(t)
+	val := map[int]string{1: "2"}
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`{"1":"2"}`, str)
+}
+
+func Test_decode_int_key_map(t *testing.T) {
+	should := require.New(t)
+	var val map[int]string
+	should.Nil(UnmarshalFromString(`{"1":"2"}`, &val))
+	should.Equal(map[int]string{1: "2"}, val)
+}
+
+func Test_encode_TextMarshaler_key_map(t *testing.T) {
+	should := require.New(t)
+	f, _, _ := big.ParseFloat("1", 10, 64, big.ToZero)
+	val := map[*big.Float]string{f: "2"}
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`{"1":"2"}`, str)
+}
+
+func Test_decode_TextMarshaler_key_map(t *testing.T) {
+	should := require.New(t)
+	var val map[*big.Float]string
+	should.Nil(UnmarshalFromString(`{"1":"2"}`, &val))
+	str, err := MarshalToString(val)
+	should.Nil(err)
+	should.Equal(`{"1":"2"}`, str)
+}
+
+func Test_map_key_with_escaped_char(t *testing.T) {
+	type Ttest struct {
+		Map map[string]string
+	}
+	var jsonBytes = []byte(`
+	{
+	    "Map":{
+		"k\"ey": "val"
+	    }
+	}`)
+	should := require.New(t)
+	{
+		var obj Ttest
+		should.Nil(json.Unmarshal(jsonBytes, &obj))
+		should.Equal(map[string]string{"k\"ey": "val"}, obj.Map)
+	}
+	{
+		var obj Ttest
+		should.Nil(Unmarshal(jsonBytes, &obj))
+		should.Equal(map[string]string{"k\"ey": "val"}, obj.Map)
 	}
 }
 
-func Test_read_map_of_any(t *testing.T) {
-	iter := ParseString(`{"hello": "world"}`)
-	m := map[string]Any{"1": *MakeAny("2")}
-	iter.Read(&m)
-	if !reflect.DeepEqual(map[string]Any{"1": *MakeAny("2"), "hello": *MakeAny("world")}, m) {
-		fmt.Println(iter.Error)
-		t.Fatal(m)
+func Test_encode_map_with_sorted_keys(t *testing.T) {
+	should := require.New(t)
+	m := map[string]interface{}{
+		"3": 3,
+		"1": 1,
+		"2": 2,
 	}
+	bytes, err := json.Marshal(m)
+	should.Nil(err)
+	output, err := ConfigCompatibleWithStandardLibrary.MarshalToString(m)
+	should.Nil(err)
+	should.Equal(string(bytes), output)
 }

jsoniter_nested_test.go

@@ -1,9 +1,9 @@
 package jsoniter
 
 import (
-	"testing"
-	"reflect"
 	"encoding/json"
+	"reflect"
+	"testing"
 )
 
 type Level1 struct {
@@ -15,7 +15,7 @@ type Level2 struct {
 }
 
 func Test_nested(t *testing.T) {
-	iter := ParseString(`{"hello": [{"world": "value1"}, {"world": "value2"}]}`)
+	iter := ParseString(ConfigOfDefault, `{"hello": [{"world": "value1"}, {"world": "value2"}]}`)
 	l1 := Level1{}
 	for l1Field := iter.ReadObject(); l1Field != ""; l1Field = iter.ReadObject() {
 		switch l1Field {
@@ -28,14 +28,14 @@ func Test_nested(t *testing.T) {
 					case "world":
 						l2.World = iter.ReadString()
 					default:
-						iter.ReportError("bind l2", "unexpected field: " + l2Field)
+						iter.reportError("bind l2", "unexpected field: "+l2Field)
 					}
 				}
 				l2Array = append(l2Array, l2)
 			}
 			l1.Hello = l2Array
 		default:
-			iter.ReportError("bind l1", "unexpected field: " + l1Field)
+			iter.reportError("bind l1", "unexpected field: "+l1Field)
 		}
 	}
 	if !reflect.DeepEqual(l1, Level1{
@@ -50,7 +50,7 @@ func Test_nested(t *testing.T) {
 
 func Benchmark_jsoniter_nested(b *testing.B) {
 	for n := 0; n < b.N; n++ {
-		iter := ParseString(`{"hello": [{"world": "value1"}, {"world": "value2"}]}`)
+		iter := ParseString(ConfigOfDefault, `{"hello": [{"world": "value1"}, {"world": "value2"}]}`)
 		l1 := Level1{}
 		for l1Field := iter.ReadObject(); l1Field != ""; l1Field = iter.ReadObject() {
 			switch l1Field {

jsoniter_null_test.go

@@ -1,18 +1,47 @@
 package jsoniter
 
 import (
+	"bytes"
+	"encoding/json"
+	"github.com/json-iterator/go/require"
 	"testing"
 )
 
-func Test_null(t *testing.T) {
-	iter := ParseString(`null`)
-	if iter.ReadNull() != true {
-		t.FailNow()
-	}
+func Test_read_null(t *testing.T) {
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `null`)
+	should.True(iter.ReadNil())
+	iter = ParseString(ConfigOfDefault, `null`)
+	should.Nil(iter.Read())
+	iter = ParseString(ConfigOfDefault, `null`)
+	any, err := UnmarshalAnyFromString(`null`)
+	should.Nil(err)
+	should.Equal(0, any.ToInt())
+	should.Equal(float64(0), any.ToFloat64())
+	should.Equal("", any.ToString())
+	should.False(any.ToBool())
 }
 
-func Test_null_object(t *testing.T) {
-	iter := ParseString(`[null,"a"]`)
+func Test_write_null(t *testing.T) {
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 4096)
+	stream.WriteNil()
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("null", buf.String())
+}
+
+func Test_encode_null(t *testing.T) {
+	should := require.New(t)
+	str, err := MarshalToString(nil)
+	should.Nil(err)
+	should.Equal("null", str)
+}
+
+func Test_decode_null_object(t *testing.T) {
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `[null,"a"]`)
 	iter.ReadArray()
 	if iter.ReadObject() != "" {
 		t.FailNow()
@@ -21,10 +50,16 @@ func Test_null_object(t *testing.T) {
 	if iter.ReadString() != "a" {
 		t.FailNow()
 	}
+	type TestObject struct {
+		Field string
+	}
+	objs := []TestObject{}
+	should.Nil(UnmarshalFromString("[null]", &objs))
+	should.Len(objs, 1)
 }
 
-func Test_null_array(t *testing.T) {
-	iter := ParseString(`[null,"a"]`)
+func Test_decode_null_array(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `[null,"a"]`)
 	iter.ReadArray()
 	if iter.ReadArray() != false {
 		t.FailNow()
@@ -35,20 +70,17 @@ func Test_null_array(t *testing.T) {
 	}
 }
 
-func Test_null_string(t *testing.T) {
-	iter := ParseString(`[null,"a"]`)
-	iter.ReadArray()
-	if iter.ReadString() != "" {
-		t.FailNow()
-	}
-	iter.ReadArray()
-	if iter.ReadString() != "a" {
-		t.FailNow()
-	}
+func Test_decode_null_string(t *testing.T) {
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `[null,"a"]`)
+	should.True(iter.ReadArray())
+	should.Equal("", iter.ReadString())
+	should.True(iter.ReadArray())
+	should.Equal("a", iter.ReadString())
 }
 
-func Test_null_skip(t *testing.T) {
-	iter := ParseString(`[null,"a"]`)
+func Test_decode_null_skip(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `[null,"a"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -56,3 +88,39 @@ func Test_null_skip(t *testing.T) {
 		t.FailNow()
 	}
 }
+
+func Test_encode_nil_map(t *testing.T) {
+	should := require.New(t)
+	type Ttest map[string]string
+	var obj1 Ttest
+	output, err := json.Marshal(obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+	output, err = json.Marshal(&obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+	output, err = Marshal(obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+	output, err = Marshal(&obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+}
+
+func Test_encode_nil_array(t *testing.T) {
+	should := require.New(t)
+	type Ttest []string
+	var obj1 Ttest
+	output, err := json.Marshal(obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+	output, err = json.Marshal(&obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+	output, err = Marshal(obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+	output, err = Marshal(&obj1)
+	should.Nil(err)
+	should.Equal("null", string(output))
+}

jsoniter_object_test.go

@@ -1,59 +1,54 @@
 package jsoniter
 
 import (
-	"testing"
+	"bytes"
 	"encoding/json"
-	"fmt"
+	"github.com/json-iterator/go/require"
+	"testing"
 )
 
 func Test_empty_object(t *testing.T) {
-	iter := ParseString(`{}`)
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `{}`)
 	field := iter.ReadObject()
-	if field != "" {
-		t.Fatal(field)
-	}
+	should.Equal("", field)
+	iter = ParseString(ConfigOfDefault, `{}`)
+	iter.ReadObjectCB(func(iter *Iterator, field string) bool {
+		should.FailNow("should not call")
+		return true
+	})
 }
 
 func Test_one_field(t *testing.T) {
-	iter := ParseString(`{"a": "b"}`)
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `{"a": "b"}`)
 	field := iter.ReadObject()
-	if field != "a" {
-		fmt.Println(iter.Error)
-		t.Fatal(field)
-	}
+	should.Equal("a", field)
 	value := iter.ReadString()
-	if value != "b" {
-		t.Fatal(field)
-	}
+	should.Equal("b", value)
 	field = iter.ReadObject()
-	if field != "" {
-		t.Fatal(field)
-	}
+	should.Equal("", field)
+	iter = ParseString(ConfigOfDefault, `{"a": "b"}`)
+	should.True(iter.ReadObjectCB(func(iter *Iterator, field string) bool {
+		should.Equal("a", field)
+		return true
+	}))
 }
 
 func Test_two_field(t *testing.T) {
-	iter := ParseString(`{ "a": "b" , "c": "d" }`)
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `{ "a": "b" , "c": "d" }`)
 	field := iter.ReadObject()
-	if field != "a" {
-		t.Fatal(field)
-	}
+	should.Equal("a", field)
 	value := iter.ReadString()
-	if value != "b" {
-		t.Fatal(field)
-	}
+	should.Equal("b", value)
 	field = iter.ReadObject()
-	if field != "c" {
-		t.Fatal(field)
-	}
+	should.Equal("c", field)
 	value = iter.ReadString()
-	if value != "d" {
-		t.Fatal(field)
-	}
+	should.Equal("d", value)
 	field = iter.ReadObject()
-	if field != "" {
-		t.Fatal(field)
-	}
-	iter = ParseString(`{"field1": "1", "field2": 2}`)
+	should.Equal("", field)
+	iter = ParseString(ConfigOfDefault, `{"field1": "1", "field2": 2}`)
 	for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
 		switch field {
 		case "field1":
@@ -61,19 +56,180 @@ func Test_two_field(t *testing.T) {
 		case "field2":
 			iter.ReadInt64()
 		default:
-			iter.ReportError("bind object", "unexpected field")
+			iter.reportError("bind object", "unexpected field")
 		}
 	}
 }
 
+func Test_read_object_as_any(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString(`{"a":"b","c":"d"}`)
+	should.Nil(err)
+	should.Equal(`{"a":"b","c":"d"}`, any.ToString())
+	// partial parse
+	should.Equal("b", any.Get("a").ToString())
+	should.Equal("d", any.Get("c").ToString())
+	should.Equal(2, len(any.Keys()))
+	any, err = UnmarshalAnyFromString(`{"a":"b","c":"d"}`)
+	// full parse
+	should.Equal(2, len(any.Keys()))
+	should.Equal(2, any.Size())
+	should.True(any.ToBool())
+	should.Equal(1, any.ToInt())
+}
+
+func Test_object_any_lazy_iterator(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString(`{"a":"b","c":"d"}`)
+	should.Nil(err)
+	// iterator parse
+	vals := map[string]string{}
+	var k string
+	var v Any
+	next, hasNext := any.IterateObject()
+	should.True(hasNext)
+
+	k, v, hasNext = next()
+	should.True(hasNext)
+	vals[k] = v.ToString()
+
+	// trigger full parse
+	should.Equal(2, len(any.Keys()))
+
+	k, v, hasNext = next()
+	should.False(hasNext)
+	vals[k] = v.ToString()
+
+	should.Equal(map[string]string{"a": "b", "c": "d"}, vals)
+	vals = map[string]string{}
+	for next, hasNext := any.IterateObject(); hasNext; {
+		k, v, hasNext = next()
+		if v.ValueType() == String {
+			vals[k] = v.ToString()
+		}
+	}
+	should.Equal(map[string]string{"a": "b", "c": "d"}, vals)
+}
+
+func Test_object_any_with_two_lazy_iterators(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString(`{"a":"b","c":"d","e":"f"}`)
+	should.Nil(err)
+	var k string
+	var v Any
+	next1, hasNext1 := any.IterateObject()
+	next2, hasNext2 := any.IterateObject()
+	should.True(hasNext1)
+	k, v, hasNext1 = next1()
+	should.True(hasNext1)
+	should.Equal("a", k)
+	should.Equal("b", v.ToString())
+
+	should.True(hasNext2)
+	k, v, hasNext2 = next2()
+	should.True(hasNext2)
+	should.Equal("a", k)
+	should.Equal("b", v.ToString())
+
+	k, v, hasNext1 = next1()
+	should.True(hasNext1)
+	should.Equal("c", k)
+	should.Equal("d", v.ToString())
+
+	k, v, hasNext2 = next2()
+	should.True(hasNext2)
+	should.Equal("c", k)
+	should.Equal("d", v.ToString())
+}
+
+func Test_object_lazy_any_get(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString(`{"a":{"b":{"c":"d"}}}`)
+	should.Nil(err)
+	should.Equal("d", any.Get("a", "b", "c").ToString())
+}
+
+func Test_object_lazy_any_get_all(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString(`{"a":[0],"b":[1]}`)
+	should.Nil(err)
+	should.Contains(any.Get('*', 0).ToString(), `"a":0`)
+}
+
+func Test_object_lazy_any_get_invalid(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString(`{}`)
+	should.Nil(err)
+	should.Equal(Invalid, any.Get("a", "b", "c").ValueType())
+	should.Equal(Invalid, any.Get(1).ValueType())
+}
+
+func Test_object_lazy_any_set(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString(`{"a":{"b":{"c":"d"}}}`)
+	should.Nil(err)
+	any.GetObject()["a"] = WrapInt64(1)
+	str, err := MarshalToString(any)
+	should.Nil(err)
+	should.Equal(`{"a":1}`, str)
+}
+
+func Test_wrap_object(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string
+		field2 string
+	}
+	any := Wrap(TestObject{"hello", "world"})
+	should.Equal("hello", any.Get("Field1").ToString())
+	any = Wrap(TestObject{"hello", "world"})
+	should.Equal(2, any.Size())
+	any = Wrap(TestObject{"hello", "world"})
+	vals := map[string]string{}
+	var k string
+	var v Any
+	for next, hasNext := any.IterateObject(); hasNext; {
+		k, v, hasNext = next()
+		if v.ValueType() == String {
+			vals[k] = v.ToString()
+		}
+	}
+	should.Equal(map[string]string{"Field1": "hello"}, vals)
+}
+
+func Test_object_wrapper_any_get_all(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 []int
+		Field2 []int
+	}
+	any := Wrap(TestObject{[]int{1, 2}, []int{3, 4}})
+	should.Contains(any.Get('*', 0).ToString(), `"Field2":3`)
+}
+
+func Test_write_object(t *testing.T) {
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(Config{IndentionStep: 2}.Froze(), buf, 4096)
+	stream.WriteObjectStart()
+	stream.WriteObjectField("hello")
+	stream.WriteInt(1)
+	stream.WriteMore()
+	stream.WriteObjectField("world")
+	stream.WriteInt(2)
+	stream.WriteObjectEnd()
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal("{\n  \"hello\":1,\n  \"world\":2\n}", buf.String())
+}
+
+func Benchmark_jsoniter_object(b *testing.B) {
 	type TestObj struct {
 		Field1 string
 		Field2 uint64
 	}
-
-func Benchmark_jsoniter_object(b *testing.B) {
 	for n := 0; n < b.N; n++ {
-		iter := ParseString(`{"field1": "1", "field2": 2}`)
+		iter := ParseString(ConfigOfDefault, `{"field1": "1", "field2": 2}`)
 		obj := TestObj{}
 		for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
 			switch field {
@@ -82,13 +238,17 @@ func Benchmark_jsoniter_object(b *testing.B) {
 			case "field2":
 				obj.Field2 = iter.ReadUint64()
 			default:
-				iter.ReportError("bind object", "unexpected field")
+				iter.reportError("bind object", "unexpected field")
 			}
 		}
 	}
 }
 
 func Benchmark_json_object(b *testing.B) {
+	type TestObj struct {
+		Field1 string
+		Field2 uint64
+	}
 	for n := 0; n < b.N; n++ {
 		result := TestObj{}
 		json.Unmarshal([]byte(`{"field1": "1", "field2": 2}`), &result)

jsoniter_optional_test.go

@@ -0,0 +1,46 @@
+package jsoniter
+
+import (
+	"github.com/json-iterator/go/require"
+	"testing"
+)
+
+func Test_encode_optional_int_pointer(t *testing.T) {
+	should := require.New(t)
+	var ptr *int
+	str, err := MarshalToString(ptr)
+	should.Nil(err)
+	should.Equal("null", str)
+	val := 100
+	ptr = &val
+	str, err = MarshalToString(ptr)
+	should.Nil(err)
+	should.Equal("100", str)
+}
+
+func Test_decode_struct_with_optional_field(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 *string
+		Field2 *string
+	}
+	obj := TestObject{}
+	UnmarshalFromString(`{"field1": null, "field2": "world"}`, &obj)
+	should.Nil(obj.Field1)
+	should.Equal("world", *obj.Field2)
+}
+
+func Test_encode_struct_with_optional_field(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 *string
+		Field2 *string
+	}
+	obj := TestObject{}
+	world := "world"
+	obj.Field2 = &world
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Contains(str, `"Field1":null`)
+	should.Contains(str, `"Field2":"world"`)
+}

jsoniter_reflect.go

@@ -1,819 +0,0 @@
-package jsoniter
-
-import (
-	"reflect"
-	"errors"
-	"fmt"
-	"unsafe"
-	"sync/atomic"
-	"strings"
-	"io"
-	"strconv"
-)
-
-type Decoder interface {
-	decode(ptr unsafe.Pointer, iter *Iterator)
-}
-
-type stringDecoder struct {
-}
-
-func (decoder *stringDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*string)(ptr)) = iter.ReadString()
-}
-
-type intDecoder struct {
-}
-
-func (decoder *intDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*int)(ptr)) = iter.ReadInt()
-}
-
-type int8Decoder struct {
-}
-
-func (decoder *int8Decoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*int8)(ptr)) = iter.ReadInt8()
-}
-
-type int16Decoder struct {
-}
-
-func (decoder *int16Decoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*int16)(ptr)) = iter.ReadInt16()
-}
-
-type int32Decoder struct {
-}
-
-func (decoder *int32Decoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*int32)(ptr)) = iter.ReadInt32()
-}
-
-type int64Decoder struct {
-}
-
-func (decoder *int64Decoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*int64)(ptr)) = iter.ReadInt64()
-}
-
-type uintDecoder struct {
-}
-
-func (decoder *uintDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*uint)(ptr)) = iter.ReadUint()
-}
-
-type uint8Decoder struct {
-}
-
-func (decoder *uint8Decoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*uint8)(ptr)) = iter.ReadUint8()
-}
-
-type uint16Decoder struct {
-}
-
-func (decoder *uint16Decoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*uint16)(ptr)) = iter.ReadUint16()
-}
-
-type uint32Decoder struct {
-}
-
-func (decoder *uint32Decoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*uint32)(ptr)) = iter.ReadUint32()
-}
-
-type uint64Decoder struct {
-}
-
-func (decoder *uint64Decoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*uint64)(ptr)) = iter.ReadUint64()
-}
-
-type float32Decoder struct {
-}
-
-func (decoder *float32Decoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*float32)(ptr)) = iter.ReadFloat32()
-}
-
-type float64Decoder struct {
-}
-
-func (decoder *float64Decoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*float64)(ptr)) = iter.ReadFloat64()
-}
-
-type boolDecoder struct {
-}
-
-func (decoder *boolDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*bool)(ptr)) = iter.ReadBool()
-}
-
-type interfaceDecoder struct {
-}
-
-func (decoder *interfaceDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*interface{})(ptr)) = iter.ReadAny().Get()
-}
-
-
-type anyDecoder struct {
-}
-
-func (decoder *anyDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	*((*Any)(ptr)) = *iter.ReadAny()
-}
-
-type stringNumberDecoder struct {
-	elemDecoder Decoder
-}
-
-func (decoder *stringNumberDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	c := iter.readByte()
-	if c != '"' {
-		iter.ReportError("stringNumberDecoder", `expect "`)
-		return
-	}
-	decoder.elemDecoder.decode(ptr, iter)
-	if iter.Error != nil {
-		return
-	}
-	c = iter.readByte()
-	if c != '"' {
-		iter.ReportError("stringNumberDecoder", `expect "`)
-		return
-	}
-}
-
-type optionalDecoder struct {
-	valueType    reflect.Type
-	valueDecoder Decoder
-}
-
-func (decoder *optionalDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNull() {
-		*((*unsafe.Pointer)(ptr)) = nil
-	} else {
-		value := reflect.New(decoder.valueType)
-		decoder.valueDecoder.decode(unsafe.Pointer(value.Pointer()), iter)
-		*((*uintptr)(ptr)) = value.Pointer()
-	}
-}
-
-type generalStructDecoder struct {
-	type_  reflect.Type
-	fields map[string]*structFieldDecoder
-}
-
-func (decoder *generalStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
-		fieldDecoder := decoder.fields[field]
-		if fieldDecoder == nil {
-			iter.Skip()
-		} else {
-			fieldDecoder.decode(ptr, iter)
-		}
-	}
-	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.type_, iter.Error.Error())
-	}
-}
-
-type skipDecoder struct {
-	type_ reflect.Type
-}
-
-func (decoder *skipDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	iter.Skip()
-	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.type_, iter.Error.Error())
-	}
-}
-
-type oneFieldStructDecoder struct {
-	type_        reflect.Type
-	fieldName    string
-	fieldDecoder *structFieldDecoder
-}
-
-func (decoder *oneFieldStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
-		if field == decoder.fieldName {
-			decoder.fieldDecoder.decode(ptr, iter)
-		} else {
-			iter.Skip()
-		}
-	}
-	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.type_, iter.Error.Error())
-	}
-}
-
-type twoFieldsStructDecoder struct {
-	type_         reflect.Type
-	fieldName1    string
-	fieldDecoder1 *structFieldDecoder
-	fieldName2    string
-	fieldDecoder2 *structFieldDecoder
-}
-
-func (decoder *twoFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
-		switch field {
-		case decoder.fieldName1:
-			decoder.fieldDecoder1.decode(ptr, iter)
-		case decoder.fieldName2:
-			decoder.fieldDecoder2.decode(ptr, iter)
-		default:
-			iter.Skip()
-		}
-	}
-	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.type_, iter.Error.Error())
-	}
-}
-
-type threeFieldsStructDecoder struct {
-	type_         reflect.Type
-	fieldName1    string
-	fieldDecoder1 *structFieldDecoder
-	fieldName2    string
-	fieldDecoder2 *structFieldDecoder
-	fieldName3    string
-	fieldDecoder3 *structFieldDecoder
-}
-
-func (decoder *threeFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
-		switch field {
-		case decoder.fieldName1:
-			decoder.fieldDecoder1.decode(ptr, iter)
-		case decoder.fieldName2:
-			decoder.fieldDecoder2.decode(ptr, iter)
-		case decoder.fieldName3:
-			decoder.fieldDecoder3.decode(ptr, iter)
-		default:
-			iter.Skip()
-		}
-	}
-	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.type_, iter.Error.Error())
-	}
-}
-
-type fourFieldsStructDecoder struct {
-	type_         reflect.Type
-	fieldName1    string
-	fieldDecoder1 *structFieldDecoder
-	fieldName2    string
-	fieldDecoder2 *structFieldDecoder
-	fieldName3    string
-	fieldDecoder3 *structFieldDecoder
-	fieldName4    string
-	fieldDecoder4 *structFieldDecoder
-}
-
-func (decoder *fourFieldsStructDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
-		switch field {
-		case decoder.fieldName1:
-			decoder.fieldDecoder1.decode(ptr, iter)
-		case decoder.fieldName2:
-			decoder.fieldDecoder2.decode(ptr, iter)
-		case decoder.fieldName3:
-			decoder.fieldDecoder3.decode(ptr, iter)
-		case decoder.fieldName4:
-			decoder.fieldDecoder4.decode(ptr, iter)
-		default:
-			iter.Skip()
-		}
-	}
-	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.type_, iter.Error.Error())
-	}
-}
-
-type structFieldDecoder struct {
-	field        *reflect.StructField
-	fieldDecoder Decoder
-}
-
-func (decoder *structFieldDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	fieldPtr := uintptr(ptr) + decoder.field.Offset
-	decoder.fieldDecoder.decode(unsafe.Pointer(fieldPtr), iter)
-	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%s: %s", decoder.field.Name, iter.Error.Error())
-	}
-}
-
-type mapDecoder struct {
-	mapType  reflect.Type
-	elemType  reflect.Type
-	elemDecoder Decoder
-	mapInterface emptyInterface
-}
-
-func (decoder *mapDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	// dark magic to cast unsafe.Pointer back to interface{} using reflect.Type
-	mapInterface := decoder.mapInterface
-	mapInterface.word = ptr
-	realInterface := (*interface{})(unsafe.Pointer(&mapInterface))
-	realVal := reflect.ValueOf(*realInterface).Elem()
-
-	for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
-		elem := reflect.New(decoder.elemType)
-		decoder.elemDecoder.decode(unsafe.Pointer(elem.Pointer()), iter)
-		realVal.SetMapIndex(reflect.ValueOf(string([]byte(field))), elem.Elem())
-	}
-}
-
-type sliceDecoder struct {
-	sliceType   reflect.Type
-	elemType    reflect.Type
-	elemDecoder Decoder
-}
-
-// sliceHeader is a safe version of SliceHeader used within this package.
-type sliceHeader struct {
-	Data unsafe.Pointer
-	Len  int
-	Cap  int
-}
-
-func (decoder *sliceDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	decoder.doDecode(ptr, iter)
-	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.sliceType, iter.Error.Error())
-	}
-}
-
-func (decoder *sliceDecoder) doDecode(ptr unsafe.Pointer, iter *Iterator) {
-	slice := (*sliceHeader)(ptr)
-	reuseSlice(slice, decoder.sliceType, 4)
-	if !iter.ReadArray() {
-		return
-	}
-	offset := uintptr(0)
-	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data) + offset), iter)
-	if !iter.ReadArray() {
-		slice.Len = 1
-		return
-	}
-	offset += decoder.elemType.Size()
-	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data) + offset), iter)
-	if !iter.ReadArray() {
-		slice.Len = 2
-		return
-	}
-	offset += decoder.elemType.Size()
-	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data) + offset), iter)
-	if !iter.ReadArray() {
-		slice.Len = 3
-		return
-	}
-	offset += decoder.elemType.Size()
-	decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data) + offset), iter)
-	slice.Len = 4
-	for iter.ReadArray() {
-		growOne(slice, decoder.sliceType, decoder.elemType)
-		offset += decoder.elemType.Size()
-		decoder.elemDecoder.decode(unsafe.Pointer(uintptr(slice.Data) + offset), iter)
-	}
-}
-
-// grow grows the slice s so that it can hold extra more values, allocating
-// more capacity if needed. It also returns the old and new slice lengths.
-func growOne(slice *sliceHeader, sliceType reflect.Type, elementType reflect.Type) {
-	newLen := slice.Len + 1
-	if newLen <= slice.Cap {
-		slice.Len = newLen
-		return
-	}
-	newCap := slice.Cap
-	if newCap == 0 {
-		newCap = 1
-	} else {
-		for newCap < newLen {
-			if slice.Len < 1024 {
-				newCap += newCap
-			} else {
-				newCap += newCap / 4
-			}
-		}
-	}
-	dst := unsafe.Pointer(reflect.MakeSlice(sliceType, newLen, newCap).Pointer())
-	originalBytesCount := uintptr(slice.Len) * elementType.Size()
-	srcPtr := (*[1 << 30]byte)(slice.Data)
-	dstPtr := (*[1 << 30]byte)(dst)
-	for i := uintptr(0); i < originalBytesCount; i++ {
-		dstPtr[i] = srcPtr[i]
-	}
-	slice.Len = newLen
-	slice.Cap = newCap
-	slice.Data = dst
-}
-
-func reuseSlice(slice *sliceHeader, sliceType reflect.Type, expectedCap int) {
-	if expectedCap <= slice.Cap {
-		return
-	}
-	dst := unsafe.Pointer(reflect.MakeSlice(sliceType, 0, expectedCap).Pointer())
-	slice.Cap = expectedCap
-	slice.Data = dst
-}
-
-var DECODERS unsafe.Pointer
-
-func addDecoderToCache(cacheKey reflect.Type, decoder Decoder) {
-	retry := true
-	for retry {
-		ptr := atomic.LoadPointer(&DECODERS)
-		cache := *(*map[reflect.Type]Decoder)(ptr)
-		copy := map[reflect.Type]Decoder{}
-		for k, v := range cache {
-			copy[k] = v
-		}
-		copy[cacheKey] = decoder
-		retry = !atomic.CompareAndSwapPointer(&DECODERS, ptr, unsafe.Pointer(&copy))
-	}
-}
-
-func getDecoderFromCache(cacheKey reflect.Type) Decoder {
-	ptr := atomic.LoadPointer(&DECODERS)
-	cache := *(*map[reflect.Type]Decoder)(ptr)
-	return cache[cacheKey]
-}
-
-var typeDecoders map[string]Decoder
-var fieldDecoders map[string]Decoder
-var fieldCustomizers []FieldCustomizerFunc
-
-func init() {
-	typeDecoders = map[string]Decoder{}
-	fieldDecoders = map[string]Decoder{}
-	fieldCustomizers = []FieldCustomizerFunc{}
-	atomic.StorePointer(&DECODERS, unsafe.Pointer(&map[string]Decoder{}))
-}
-
-type DecoderFunc func(ptr unsafe.Pointer, iter *Iterator)
-type FieldCustomizerFunc func(type_ reflect.Type, field *reflect.StructField) ([]string, DecoderFunc)
-
-type funcDecoder struct {
-	func_ DecoderFunc
-}
-
-func (decoder *funcDecoder) decode(ptr unsafe.Pointer, iter *Iterator) {
-	decoder.func_(ptr, iter)
-}
-
-func RegisterTypeDecoder(type_ string, func_ DecoderFunc) {
-	typeDecoders[type_] = &funcDecoder{func_}
-}
-
-func RegisterFieldDecoder(type_ string, field string, func_ DecoderFunc) {
-	fieldDecoders[fmt.Sprintf("%s/%s", type_, field)] = &funcDecoder{func_}
-}
-
-func RegisterFieldCustomizer(func_ FieldCustomizerFunc) {
-	fieldCustomizers = append(fieldCustomizers, func_)
-}
-
-func ClearDecoders() {
-	typeDecoders = map[string]Decoder{}
-	fieldDecoders = map[string]Decoder{}
-}
-
-// emptyInterface is the header for an interface{} value.
-type emptyInterface struct {
-	typ  *struct{}
-	word unsafe.Pointer
-}
-
-func (iter *Iterator) ReadAny() (ret *Any) {
-	valueType := iter.WhatIsNext()
-	switch valueType {
-	case String:
-		return MakeAny(iter.ReadString())
-	case Number:
-		return iter.readNumber()
-	case Null:
-		return MakeAny(nil)
-	case Bool:
-		return MakeAny(iter.ReadBool())
-	case Array:
-		val := []interface{}{}
-		for (iter.ReadArray()) {
-			element := iter.ReadAny()
-			if iter.Error != nil {
-				return
-			}
-			val = append(val, element.val)
-		}
-		return MakeAny(val)
-	case Object:
-		val := map[string]interface{}{}
-		for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
-			element := iter.ReadAny()
-			if iter.Error != nil {
-				return
-			}
-			val[string([]byte(field))] = element.val
-		}
-		return MakeAny(val)
-	default:
-		iter.ReportError("ReadAny", fmt.Sprintf("unexpected value type: %v", valueType))
-		return MakeAny(nil)
-	}
-}
-
-
-
-func (iter *Iterator) readNumber() (ret *Any) {
-	strBuf := [8]byte{}
-	str := strBuf[0:0]
-	hasMore := true
-	foundFloat := false
-	foundNegative := false
-	for(hasMore) {
-		for i := iter.head; i < iter.tail; i++ {
-			c := iter.buf[i]
-			switch c {
-			case '-':
-				foundNegative = true
-				str = append(str, c)
-				continue
-			case '+', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
-				str = append(str, c)
-				continue
-			case '.', 'e', 'E':
-				foundFloat = true
-				str = append(str, c)
-				continue
-			default:
-				hasMore = false
-				break
-			}
-		}
-		if hasMore {
-			if !iter.loadMore() {
-				break
-			}
-		}
-	}
-	if iter.Error != nil && iter.Error != io.EOF {
-		return
-	}
-	number := *(*string)(unsafe.Pointer(&str))
-	if foundFloat {
-		val, err := strconv.ParseFloat(number, 64)
-		if err != nil {
-			iter.Error = err
-			return
-		}
-		return MakeAny(val)
-	}
-	if foundNegative {
-		val, err := strconv.ParseInt(number, 10, 64)
-		if err != nil {
-			iter.Error = err
-			return
-		}
-		return MakeAny(val)
-	}
-	val, err := strconv.ParseUint(number, 10, 64)
-	if err != nil {
-		iter.Error = err
-		return
-	}
-	return MakeAny(val)
-}
-
-func (iter *Iterator) Read(obj interface{}) {
-	type_ := reflect.TypeOf(obj)
-	cacheKey := type_.Elem()
-	cachedDecoder := getDecoderFromCache(cacheKey)
-	if cachedDecoder == nil {
-		decoder, err := decoderOfType(type_)
-		if err != nil {
-			iter.Error = err
-			return
-		}
-		cachedDecoder = decoder
-		addDecoderToCache(cacheKey, decoder)
-	}
-	e := (*emptyInterface)(unsafe.Pointer(&obj))
-	cachedDecoder.decode(e.word, iter)
-}
-
-type prefix string
-
-func (p prefix) addTo(decoder Decoder, err error) (Decoder, error) {
-	if err != nil {
-		return nil, fmt.Errorf("%s: %s", p, err.Error())
-	}
-	return decoder, err
-}
-
-func decoderOfType(type_ reflect.Type) (Decoder, error) {
-	switch type_.Kind() {
-	case reflect.Ptr:
-		return prefix("ptr").addTo(decoderOfPtr(type_.Elem()))
-	default:
-		return nil, errors.New("expect ptr")
-	}
-}
-
-func decoderOfPtr(type_ reflect.Type) (Decoder, error) {
-	typeName := type_.String()
-	if typeName == "jsoniter.Any" {
-		return &anyDecoder{}, nil
-	}
-	typeDecoder := typeDecoders[typeName]
-	if typeDecoder != nil {
-		return typeDecoder, nil
-	}
-	switch type_.Kind() {
-	case reflect.String:
-		return &stringDecoder{}, nil
-	case reflect.Int:
-		return &intDecoder{}, nil
-	case reflect.Int8:
-		return &int8Decoder{}, nil
-	case reflect.Int16:
-		return &int16Decoder{}, nil
-	case reflect.Int32:
-		return &int32Decoder{}, nil
-	case reflect.Int64:
-		return &int64Decoder{}, nil
-	case reflect.Uint:
-		return &uintDecoder{}, nil
-	case reflect.Uint8:
-		return &uint8Decoder{}, nil
-	case reflect.Uint16:
-		return &uint16Decoder{}, nil
-	case reflect.Uint32:
-		return &uint32Decoder{}, nil
-	case reflect.Uint64:
-		return &uint64Decoder{}, nil
-	case reflect.Float32:
-		return &float32Decoder{}, nil
-	case reflect.Float64:
-		return &float64Decoder{}, nil
-	case reflect.Bool:
-		return &boolDecoder{}, nil
-	case reflect.Interface:
-		return &interfaceDecoder{}, nil
-	case reflect.Struct:
-		return decoderOfStruct(type_)
-	case reflect.Slice:
-		return prefix("[slice]").addTo(decoderOfSlice(type_))
-	case reflect.Map:
-		return prefix("[map]").addTo(decoderOfMap(type_))
-	case reflect.Ptr:
-		return prefix("[optional]").addTo(decoderOfOptional(type_.Elem()))
-	default:
-		return nil, fmt.Errorf("unsupported type: %v", type_)
-	}
-}
-
-func decoderOfOptional(type_ reflect.Type) (Decoder, error) {
-	decoder, err := decoderOfPtr(type_)
-	if err != nil {
-		return nil, err
-	}
-	return &optionalDecoder{type_, decoder}, nil
-}
-
-func decoderOfStruct(type_ reflect.Type) (Decoder, error) {
-	fields := map[string]*structFieldDecoder{}
-	for i := 0; i < type_.NumField(); i++ {
-		field := type_.Field(i)
-		fieldDecoderKey := fmt.Sprintf("%s/%s", type_.String(), field.Name)
-		var fieldNames []string
-		for _, customizer := range fieldCustomizers {
-			alternativeFieldNames, func_ := customizer(type_, &field)
-			if alternativeFieldNames != nil {
-				fieldNames = alternativeFieldNames
-			}
-			if func_ != nil {
-				fieldDecoders[fieldDecoderKey] = &funcDecoder{func_}
-			}
-		}
-		decoder := fieldDecoders[fieldDecoderKey]
-		tagParts := strings.Split(field.Tag.Get("json"), ",")
-		if fieldNames == nil {
-			switch tagParts[0] {
-			case "":
-				fieldNames = []string{field.Name}
-			case "-":
-				fieldNames = []string{}
-			}
-		}
-		if decoder == nil {
-			var err error
-			decoder, err = decoderOfPtr(field.Type)
-			if err != nil {
-				return prefix(fmt.Sprintf("{%s}", field.Name)).addTo(decoder, err)
-			}
-		}
-		if len(tagParts) > 1 && tagParts[1] == "string" {
-			decoder = &stringNumberDecoder{decoder}
-		}
-		for _, fieldName := range fieldNames {
-			fields[fieldName] = &structFieldDecoder{&field, decoder}
-		}
-	}
-	switch len(fields) {
-	case 0:
-		return &skipDecoder{type_}, nil
-	case 1:
-		for fieldName, fieldDecoder := range fields {
-			return &oneFieldStructDecoder{type_, fieldName, fieldDecoder}, nil
-		}
-	case 2:
-		var fieldName1 string
-		var fieldName2 string
-		var fieldDecoder1 *structFieldDecoder
-		var fieldDecoder2 *structFieldDecoder
-		for fieldName, fieldDecoder := range fields {
-			if fieldName1 == "" {
-				fieldName1 = fieldName
-				fieldDecoder1 = fieldDecoder
-			} else {
-				fieldName2 = fieldName
-				fieldDecoder2 = fieldDecoder
-			}
-		}
-		return &twoFieldsStructDecoder{type_, fieldName1, fieldDecoder1, fieldName2, fieldDecoder2}, nil
-	case 3:
-		var fieldName1 string
-		var fieldName2 string
-		var fieldName3 string
-		var fieldDecoder1 *structFieldDecoder
-		var fieldDecoder2 *structFieldDecoder
-		var fieldDecoder3 *structFieldDecoder
-		for fieldName, fieldDecoder := range fields {
-			if fieldName1 == "" {
-				fieldName1 = fieldName
-				fieldDecoder1 = fieldDecoder
-			} else if fieldName2 == "" {
-				fieldName2 = fieldName
-				fieldDecoder2 = fieldDecoder
-			} else {
-				fieldName3 = fieldName
-				fieldDecoder3 = fieldDecoder
-			}
-		}
-		return &threeFieldsStructDecoder{type_,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3}, nil
-	case 4:
-		var fieldName1 string
-		var fieldName2 string
-		var fieldName3 string
-		var fieldName4 string
-		var fieldDecoder1 *structFieldDecoder
-		var fieldDecoder2 *structFieldDecoder
-		var fieldDecoder3 *structFieldDecoder
-		var fieldDecoder4 *structFieldDecoder
-		for fieldName, fieldDecoder := range fields {
-			if fieldName1 == "" {
-				fieldName1 = fieldName
-				fieldDecoder1 = fieldDecoder
-			} else if fieldName2 == "" {
-				fieldName2 = fieldName
-				fieldDecoder2 = fieldDecoder
-			} else if fieldName3 == "" {
-				fieldName3 = fieldName
-				fieldDecoder3 = fieldDecoder
-			} else {
-				fieldName4 = fieldName
-				fieldDecoder4 = fieldDecoder
-			}
-		}
-		return &fourFieldsStructDecoder{type_,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3,
-			fieldName4, fieldDecoder4}, nil
-	}
-	return &generalStructDecoder{type_, fields}, nil
-}
-
-func decoderOfSlice(type_ reflect.Type) (Decoder, error) {
-	decoder, err := decoderOfPtr(type_.Elem())
-	if err != nil {
-		return nil, err
-	}
-	return &sliceDecoder{type_, type_.Elem(), decoder}, nil
-}
-
-func decoderOfMap(type_ reflect.Type) (Decoder, error) {
-	decoder, err := decoderOfPtr(type_.Elem())
-	if err != nil {
-		return nil, err
-	}
-	mapInterface := reflect.New(type_).Interface()
-	return &mapDecoder{type_, type_.Elem(), decoder, *((*emptyInterface)(unsafe.Pointer(&mapInterface)))}, nil
-}

jsoniter_reflect_native_test.go

@@ -0,0 +1,154 @@
+package jsoniter
+
+import (
+	"fmt"
+	"testing"
+)
+
+func Test_reflect_str(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `"hello"`)
+	str := ""
+	iter.ReadVal(&str)
+	if str != "hello" {
+		fmt.Println(iter.Error)
+		t.Fatal(str)
+	}
+}
+
+func Test_reflect_ptr_str(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `"hello"`)
+	var str *string
+	iter.ReadVal(&str)
+	if *str != "hello" {
+		t.Fatal(str)
+	}
+}
+
+func Test_reflect_int(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `123`)
+	val := int(0)
+	iter.ReadVal(&val)
+	if val != 123 {
+		t.Fatal(val)
+	}
+}
+
+func Test_reflect_int8(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `123`)
+	val := int8(0)
+	iter.ReadVal(&val)
+	if val != 123 {
+		t.Fatal(val)
+	}
+}
+
+func Test_reflect_int16(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `123`)
+	val := int16(0)
+	iter.ReadVal(&val)
+	if val != 123 {
+		t.Fatal(val)
+	}
+}
+
+func Test_reflect_int32(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `123`)
+	val := int32(0)
+	iter.ReadVal(&val)
+	if val != 123 {
+		t.Fatal(val)
+	}
+}
+
+func Test_reflect_int64(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `123`)
+	val := int64(0)
+	iter.ReadVal(&val)
+	if val != 123 {
+		t.Fatal(val)
+	}
+}
+
+func Test_reflect_uint(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `123`)
+	val := uint(0)
+	iter.ReadVal(&val)
+	if val != 123 {
+		t.Fatal(val)
+	}
+}
+
+func Test_reflect_uint8(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `123`)
+	val := uint8(0)
+	iter.ReadVal(&val)
+	if val != 123 {
+		t.Fatal(val)
+	}
+}
+
+func Test_reflect_uint16(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `123`)
+	val := uint16(0)
+	iter.ReadVal(&val)
+	if val != 123 {
+		t.Fatal(val)
+	}
+}
+
+func Test_reflect_uint32(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `123`)
+	val := uint32(0)
+	iter.ReadVal(&val)
+	if val != 123 {
+		t.Fatal(val)
+	}
+}
+
+func Test_reflect_uint64(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `123`)
+	val := uint64(0)
+	iter.ReadVal(&val)
+	if val != 123 {
+		t.Fatal(val)
+	}
+}
+
+func Test_reflect_byte(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `123`)
+	val := byte(0)
+	iter.ReadVal(&val)
+	if val != 123 {
+		t.Fatal(val)
+	}
+}
+
+func Test_reflect_float32(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `1.23`)
+	val := float32(0)
+	iter.ReadVal(&val)
+	if val != 1.23 {
+		fmt.Println(iter.Error)
+		t.Fatal(val)
+	}
+}
+
+func Test_reflect_float64(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `1.23`)
+	val := float64(0)
+	iter.ReadVal(&val)
+	if val != 1.23 {
+		fmt.Println(iter.Error)
+		t.Fatal(val)
+	}
+}
+
+func Test_reflect_bool(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `true`)
+	val := false
+	iter.ReadVal(&val)
+	if val != true {
+		fmt.Println(iter.Error)
+		t.Fatal(val)
+	}
+}

jsoniter_reflect_struct_test.go

@@ -0,0 +1,241 @@
+package jsoniter
+
+import (
+	"bytes"
+	"github.com/json-iterator/go/require"
+	"testing"
+)
+
+func Test_decode_one_field_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string
+	}
+	obj := TestObject{}
+	should.Nil(UnmarshalFromString(`{}`, &obj))
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"field1": "hello"}`, &obj))
+	should.Equal("hello", obj.Field1)
+}
+
+func Test_decode_two_fields_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string
+		Field2 string
+	}
+	obj := TestObject{}
+	should.Nil(UnmarshalFromString(`{}`, &obj))
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"Field1": "a", "Field2": "b"}`, &obj))
+	should.Equal("a", obj.Field1)
+	should.Equal("b", obj.Field2)
+}
+
+func Test_decode_three_fields_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string
+		Field2 string
+		Field3 string
+	}
+	obj := TestObject{}
+	should.Nil(UnmarshalFromString(`{}`, &obj))
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"Field1": "a", "Field2": "b", "Field3": "c"}`, &obj))
+	should.Equal("a", obj.Field1)
+	should.Equal("b", obj.Field2)
+	should.Equal("c", obj.Field3)
+}
+
+func Test_decode_four_fields_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string
+		Field2 string
+		Field3 string
+		Field4 string
+	}
+	obj := TestObject{}
+	should.Nil(UnmarshalFromString(`{}`, &obj))
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"Field1": "a", "Field2": "b", "Field3": "c", "Field4": "d"}`, &obj))
+	should.Equal("a", obj.Field1)
+	should.Equal("b", obj.Field2)
+	should.Equal("c", obj.Field3)
+	should.Equal("d", obj.Field4)
+}
+
+func Test_decode_five_fields_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string
+		Field2 string
+		Field3 string
+		Field4 string
+		Field5 string
+	}
+	obj := TestObject{}
+	should.Nil(UnmarshalFromString(`{}`, &obj))
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"Field1": "a", "Field2": "b", "Field3": "c", "Field4": "d", "Field5": "e"}`, &obj))
+	should.Equal("a", obj.Field1)
+	should.Equal("b", obj.Field2)
+	should.Equal("c", obj.Field3)
+	should.Equal("d", obj.Field4)
+	should.Equal("e", obj.Field5)
+}
+
+func Test_decode_ten_fields_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1  string
+		Field2  string
+		Field3  string
+		Field4  string
+		Field5  string
+		Field6  string
+		Field7  string
+		Field8  string
+		Field9  string
+		Field10 string
+	}
+	obj := TestObject{}
+	should.Nil(UnmarshalFromString(`{}`, &obj))
+	should.Equal("", obj.Field1)
+	should.Nil(UnmarshalFromString(`{"Field1": "a", "Field2": "b", "Field3": "c", "Field4": "d", "Field5": "e"}`, &obj))
+	should.Equal("a", obj.Field1)
+	should.Equal("b", obj.Field2)
+	should.Equal("c", obj.Field3)
+	should.Equal("d", obj.Field4)
+	should.Equal("e", obj.Field5)
+}
+
+func Test_decode_struct_field_with_tag(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string `json:"field-1"`
+		Field2 string `json:"-"`
+		Field3 int    `json:",string"`
+	}
+	obj := TestObject{Field2: "world"}
+	UnmarshalFromString(`{"field-1": "hello", "field2": "", "Field3": "100"}`, &obj)
+	should.Equal("hello", obj.Field1)
+	should.Equal("world", obj.Field2)
+	should.Equal(100, obj.Field3)
+}
+
+func Test_write_val_zero_field_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+	}
+	obj := TestObject{}
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Equal(`{}`, str)
+}
+
+func Test_write_val_one_field_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string `json:"field-1"`
+	}
+	obj := TestObject{"hello"}
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Equal(`{"field-1":"hello"}`, str)
+}
+
+func Test_mixed(t *testing.T) {
+	should := require.New(t)
+	type AA struct {
+		ID      int                    `json:"id"`
+		Payload map[string]interface{} `json:"payload"`
+		buf     *bytes.Buffer          `json:"-"`
+	}
+	aa := AA{}
+	err := UnmarshalFromString(` {"id":1, "payload":{"account":"123","password":"456"}}`, &aa)
+	should.Nil(err)
+	should.Equal(1, aa.ID)
+	should.Equal("123", aa.Payload["account"])
+}
+
+func Test_omit_empty(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string `json:"field-1,omitempty"`
+		Field2 string `json:"field-2,omitempty"`
+		Field3 string `json:"field-3,omitempty"`
+	}
+	obj := TestObject{}
+	obj.Field2 = "hello"
+	str, err := MarshalToString(&obj)
+	should.Nil(err)
+	should.Equal(`{"field-2":"hello"}`, str)
+}
+
+func Test_any_within_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 Any
+		Field2 Any
+	}
+	obj := TestObject{}
+	err := UnmarshalFromString(`{"Field1": "hello", "Field2": [1,2,3]}`, &obj)
+	should.Nil(err)
+	should.Equal("hello", obj.Field1.ToString())
+	should.Equal("[1,2,3]", obj.Field2.ToString())
+}
+
+func Test_recursive_struct(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string
+		Me     *TestObject
+	}
+	obj := TestObject{}
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Contains(str, `"Field1":""`)
+	should.Contains(str, `"Me":null`)
+	err = UnmarshalFromString(str, &obj)
+	should.Nil(err)
+}
+
+func Test_one_field_struct(t *testing.T) {
+	should := require.New(t)
+	type YetYetAnotherObject struct {
+		Field string
+	}
+	type YetAnotherObject struct {
+		Field *YetYetAnotherObject
+	}
+	type AnotherObject struct {
+		Field *YetAnotherObject
+	}
+	type TestObject struct {
+		Me *AnotherObject
+	}
+	obj := TestObject{&AnotherObject{&YetAnotherObject{&YetYetAnotherObject{"abc"}}}}
+	str, err := MarshalToString(obj)
+	should.Nil(err)
+	should.Equal(`{"Me":{"Field":{"Field":{"Field":"abc"}}}}`, str)
+	str, err = MarshalToString(&obj)
+	should.Nil(err)
+	should.Equal(`{"Me":{"Field":{"Field":{"Field":"abc"}}}}`, str)
+}
+
+func Test_anonymous_struct_marshal(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field string
+	}
+	str, err := MarshalToString(struct {
+		TestObject
+		Field int
+	}{
+		Field: 100,
+	})
+	should.Nil(err)
+	should.Equal(`{"Field":100}`, str)
+}

jsoniter_reflect_test.go

@@ -1,267 +1,40 @@
 package jsoniter
 
 import (
-	"testing"
-	"fmt"
 	"encoding/json"
+	"fmt"
+	"github.com/json-iterator/go/require"
+	"testing"
 	"unsafe"
 )
 
-func Test_reflect_str(t *testing.T) {
-	iter := ParseString(`"hello"`)
-	str := ""
-	iter.Read(&str)
-	if str != "hello" {
-		fmt.Println(iter.Error)
-		t.Fatal(str)
-	}
-}
-
-func Test_reflect_ptr_str(t *testing.T) {
-	iter := ParseString(`"hello"`)
-	var str *string
-	iter.Read(&str)
-	if *str != "hello" {
-		t.Fatal(str)
-	}
-}
-
-func Test_reflect_int(t *testing.T) {
-	iter := ParseString(`123`)
-	val := int(0)
-	iter.Read(&val)
-	if val != 123 {
-		t.Fatal(val)
-	}
-}
-
-func Test_reflect_int8(t *testing.T) {
-	iter := ParseString(`123`)
-	val := int8(0)
-	iter.Read(&val)
-	if val != 123 {
-		t.Fatal(val)
-	}
-}
-
-func Test_reflect_int16(t *testing.T) {
-	iter := ParseString(`123`)
-	val := int16(0)
-	iter.Read(&val)
-	if val != 123 {
-		t.Fatal(val)
-	}
-}
-
-func Test_reflect_int32(t *testing.T) {
-	iter := ParseString(`123`)
-	val := int32(0)
-	iter.Read(&val)
-	if val != 123 {
-		t.Fatal(val)
-	}
-}
-
-func Test_reflect_int64(t *testing.T) {
-	iter := ParseString(`123`)
-	val := int64(0)
-	iter.Read(&val)
-	if val != 123 {
-		t.Fatal(val)
-	}
-}
-
-func Test_reflect_uint(t *testing.T) {
-	iter := ParseString(`123`)
-	val := uint(0)
-	iter.Read(&val)
-	if val != 123 {
-		t.Fatal(val)
-	}
-}
-
-func Test_reflect_uint8(t *testing.T) {
-	iter := ParseString(`123`)
-	val := uint8(0)
-	iter.Read(&val)
-	if val != 123 {
-		t.Fatal(val)
-	}
-}
-
-func Test_reflect_uint16(t *testing.T) {
-	iter := ParseString(`123`)
-	val := uint16(0)
-	iter.Read(&val)
-	if val != 123 {
-		t.Fatal(val)
-	}
-}
-
-func Test_reflect_uint32(t *testing.T) {
-	iter := ParseString(`123`)
-	val := uint32(0)
-	iter.Read(&val)
-	if val != 123 {
-		t.Fatal(val)
-	}
-}
-
-func Test_reflect_uint64(t *testing.T) {
-	iter := ParseString(`123`)
-	val := uint64(0)
-	iter.Read(&val)
-	if val != 123 {
-		t.Fatal(val)
-	}
-}
-
-func Test_reflect_byte(t *testing.T) {
-	iter := ParseString(`123`)
-	val := byte(0)
-	iter.Read(&val)
-	if val != 123 {
-		t.Fatal(val)
-	}
-}
-
-func Test_reflect_float32(t *testing.T) {
-	iter := ParseString(`1.23`)
-	val := float32(0)
-	iter.Read(&val)
-	if val != 1.23 {
-		fmt.Println(iter.Error)
-		t.Fatal(val)
-	}
-}
-
-func Test_reflect_float64(t *testing.T) {
-	iter := ParseString(`1.23`)
-	val := float64(0)
-	iter.Read(&val)
-	if val != 1.23 {
-		fmt.Println(iter.Error)
-		t.Fatal(val)
-	}
-}
-
-func Test_reflect_bool(t *testing.T) {
-	iter := ParseString(`true`)
-	val := false
-	iter.Read(&val)
-	if val != true {
-		fmt.Println(iter.Error)
-		t.Fatal(val)
-	}
-}
-
-type StructOfString struct {
-	field1 string
-	field2 string
-}
-
-func Test_reflect_struct_string(t *testing.T) {
-	iter := ParseString(`{"field1": "hello", "field2": "world"}`)
-	struct_ := StructOfString{}
-	iter.Read(&struct_)
-	if struct_.field1 != "hello" {
-		fmt.Println(iter.Error)
-		t.Fatal(struct_.field1)
-	}
-	if struct_.field2 != "world" {
-		fmt.Println(iter.Error)
-		t.Fatal(struct_.field1)
-	}
-}
-
-type StructOfStringPtr struct {
-	field1 *string
-	field2 *string
-}
-
-func Test_reflect_struct_string_ptr(t *testing.T) {
-	iter := ParseString(`{"field1": null, "field2": "world"}`)
-	struct_ := StructOfStringPtr{}
-	iter.Read(&struct_)
-	if struct_.field1 != nil {
-		fmt.Println(iter.Error)
-		t.Fatal(struct_.field1)
-	}
-	if *struct_.field2 != "world" {
-		fmt.Println(iter.Error)
-		t.Fatal(struct_.field2)
-	}
-}
-
-type StructOfTag struct {
-	field1 string `json:"field-1"`
-	field2 string `json:"-"`
-	field3 int `json:",string"`
-}
-
-func Test_reflect_struct_tag_field(t *testing.T) {
-	iter := ParseString(`{"field-1": "hello", "field2": "", "field3": "100"}`)
-	struct_ := StructOfTag{field2: "world"}
-	iter.Read(&struct_)
-	if struct_.field1 != "hello" {
-		fmt.Println(iter.Error)
-		t.Fatal(struct_.field1)
-	}
-	if struct_.field2 != "world" {
-		fmt.Println(iter.Error)
-		t.Fatal(struct_.field2)
-	}
-	if struct_.field3 != 100 {
-		fmt.Println(iter.Error)
-		t.Fatal(struct_.field3)
-	}
-}
-
-func Test_reflect_slice(t *testing.T) {
-	iter := ParseString(`["hello", "world"]`)
+func Test_decode_slice(t *testing.T) {
+	should := require.New(t)
 	slice := make([]string, 0, 5)
-	iter.Read(&slice)
-	if len(slice) != 2 {
-		fmt.Println(iter.Error)
-		t.Fatal(len(slice))
-	}
-	if slice[0] != "hello" {
-		fmt.Println(iter.Error)
-		t.Fatal(slice[0])
-	}
-	if slice[1] != "world" {
-		fmt.Println(iter.Error)
-		t.Fatal(slice[1])
-	}
+	UnmarshalFromString(`["hello", "world"]`, &slice)
+	should.Equal([]string{"hello", "world"}, slice)
 }
 
-func Test_reflect_large_slice(t *testing.T) {
-	iter := ParseString(`[1,2,3,4,5,6,7,8,9]`)
+func Test_decode_large_slice(t *testing.T) {
+	should := require.New(t)
 	slice := make([]int, 0, 1)
-	iter.Read(&slice)
-	if len(slice) != 9 {
-		fmt.Println(iter.Error)
-		t.Fatal(len(slice))
-	}
-	if slice[0] != 1 {
-		fmt.Println(iter.Error)
-		t.Fatal(slice[0])
-	}
-	if slice[8] != 9 {
-		fmt.Println(iter.Error)
-		t.Fatal(slice[1])
-	}
+	UnmarshalFromString(`[1,2,3,4,5,6,7,8,9]`, &slice)
+	should.Equal([]int{1, 2, 3, 4, 5, 6, 7, 8, 9}, slice)
 }
 
-func Test_reflect_nested(t *testing.T) {
-	iter := ParseString(`[{"field1": "hello"}, null, {"field2": "world"}]`)
+func Test_decode_nested(t *testing.T) {
+	type StructOfString struct {
+		Field1 string
+		Field2 string
+	}
+	iter := ParseString(ConfigOfDefault, `[{"field1": "hello"}, null, {"field2": "world"}]`)
 	slice := []*StructOfString{}
-	iter.Read(&slice)
+	iter.ReadVal(&slice)
 	if len(slice) != 3 {
 		fmt.Println(iter.Error)
 		t.Fatal(len(slice))
 	}
-	if slice[0].field1 != "hello" {
+	if slice[0].Field1 != "hello" {
 		fmt.Println(iter.Error)
 		t.Fatal(slice[0])
 	}
@@ -269,41 +42,42 @@ func Test_reflect_nested(t *testing.T) {
 		fmt.Println(iter.Error)
 		t.Fatal(slice[1])
 	}
-	if slice[2].field2 != "world" {
+	if slice[2].Field2 != "world" {
 		fmt.Println(iter.Error)
-		t.Fatal(slice[1])
+		t.Fatal(slice[2])
 	}
 }
 
-func Test_reflect_base64(t *testing.T) {
-	iter := ParseString(`"YWJj"`)
+func Test_decode_base64(t *testing.T) {
+	iter := ParseString(ConfigOfDefault, `"YWJj"`)
 	val := []byte{}
 	RegisterTypeDecoder("[]uint8", func(ptr unsafe.Pointer, iter *Iterator) {
 		*((*[]byte)(ptr)) = iter.ReadBase64()
 	})
-	defer ClearDecoders()
-	iter.Read(&val)
+	defer ConfigOfDefault.CleanDecoders()
+	iter.ReadVal(&val)
 	if "abc" != string(val) {
 		t.Fatal(string(val))
 	}
 }
 
 type StructOfTagOne struct {
-	field1 string `json:"field1"`
-	field2 string `json:"field2"`
-	field3 int `json:"field3,string"`
-	field4 int `json:"field4,string"`
+	Field1 string `json:"field1"`
+	Field2 string `json:"field2"`
+	Field3 int    `json:"field3,string"`
+	Field4 int    `json:"field4,string"`
 }
 
 func Benchmark_jsoniter_reflect(b *testing.B) {
 	b.ReportAllocs()
+	iter := NewIterator(ConfigOfDefault)
+	Struct := &StructOfTagOne{}
+	//var Struct *StructOfTagOne
+	input := []byte(`{"field3": "100", "field4": "100"}`)
+	//input := []byte(`null`)
 	for n := 0; n < b.N; n++ {
-		iter := ParseString(`{"field3": "100"}`)
-		struct_ := StructOfTagOne{}
-		iter.Read(&struct_)
-		//iter := ParseString(`[1,2,3]`)
-		//var array []int
-		//iter.Read(&array)
+		iter.ResetBytes(input)
+		iter.ReadVal(&Struct)
 	}
 }
 
@@ -315,14 +89,14 @@ func Benchmark_jsoniter_direct(b *testing.B) {
 		//for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
 		//	switch field {
 		//	case "field1":
-		//		struct_.field1 = iter.ReadString()
+		//		struct_.Field1 = iter.ReadString()
 		//	case "field2":
-		//		struct_.field2 = iter.ReadString()
+		//		struct_.Field2 = iter.ReadString()
 		//	default:
 		//		iter.Skip()
 		//	}
 		//}
-		iter := ParseString(`["hello", "world"]`)
+		iter := ParseString(ConfigOfDefault, `["hello", "world"]`)
 		array := make([]string, 0, 2)
 		for iter.ReadArray() {
 			array = append(array, iter.ReadString())
@@ -333,8 +107,8 @@ func Benchmark_jsoniter_direct(b *testing.B) {
 func Benchmark_json_reflect(b *testing.B) {
 	b.ReportAllocs()
 	for n := 0; n < b.N; n++ {
-		struct_ := StructOfTagOne{}
-		json.Unmarshal([]byte(`{"field3": "100"}`), &struct_)
+		Struct := StructOfTagOne{}
+		json.Unmarshal([]byte(`{"field3": "100"}`), &Struct)
 		//array := make([]string, 0, 2)
 		//json.Unmarshal([]byte(`["hello", "world"]`), &array)
 	}

jsoniter_skip_test.go

@@ -1,13 +1,12 @@
 package jsoniter
 
 import (
-	"testing"
 	"encoding/json"
+	"testing"
 )
 
-
 func Test_skip_number(t *testing.T) {
-	iter := ParseString(`[-0.12, "b"]`)
+	iter := ParseString(ConfigOfDefault, `[-0.12, "b"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -17,7 +16,7 @@ func Test_skip_number(t *testing.T) {
 }
 
 func Test_skip_null(t *testing.T) {
-	iter := ParseString(`[null , "b"]`)
+	iter := ParseString(ConfigOfDefault, `[null , "b"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -27,7 +26,7 @@ func Test_skip_null(t *testing.T) {
 }
 
 func Test_skip_true(t *testing.T) {
-	iter := ParseString(`[true , "b"]`)
+	iter := ParseString(ConfigOfDefault, `[true , "b"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -37,7 +36,7 @@ func Test_skip_true(t *testing.T) {
 }
 
 func Test_skip_false(t *testing.T) {
-	iter := ParseString(`[false , "b"]`)
+	iter := ParseString(ConfigOfDefault, `[false , "b"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -47,7 +46,7 @@ func Test_skip_false(t *testing.T) {
 }
 
 func Test_skip_array(t *testing.T) {
-	iter := ParseString(`[[1, [2, [3], 4]], "b"]`)
+	iter := ParseString(ConfigOfDefault, `[[1, [2, [3], 4]], "b"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -57,7 +56,7 @@ func Test_skip_array(t *testing.T) {
 }
 
 func Test_skip_empty_array(t *testing.T) {
-	iter := ParseString(`[ [ ], "b"]`)
+	iter := ParseString(ConfigOfDefault, `[ [ ], "b"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -67,7 +66,7 @@ func Test_skip_empty_array(t *testing.T) {
 }
 
 func Test_skip_nested(t *testing.T) {
-	iter := ParseString(`[ {"a" : [{"b": "c"}], "d": 102 }, "b"]`)
+	iter := ParseString(ConfigOfDefault, `[ {"a" : [{"b": "c"}], "d": 102 }, "b"]`)
 	iter.ReadArray()
 	iter.Skip()
 	iter.ReadArray()
@@ -107,7 +106,7 @@ func Benchmark_jsoniter_skip(b *testing.B) {
 }`)
 	for n := 0; n < b.N; n++ {
 		result := TestResp{}
-		iter := ParseBytes(input)
+		iter := ParseBytes(ConfigOfDefault, input)
 		for field := iter.ReadObject(); field != ""; field = iter.ReadObject() {
 			switch field {
 			case "code":

jsoniter_stream_test.go

@@ -0,0 +1,53 @@
+package jsoniter
+
+import (
+	"github.com/json-iterator/go/require"
+	"testing"
+)
+
+func Test_writeByte_should_grow_buffer(t *testing.T) {
+	should := require.New(t)
+	stream := NewStream(ConfigOfDefault, nil, 1)
+	stream.writeByte('1')
+	should.Equal("1", string(stream.Buffer()))
+	should.Equal(1, len(stream.buf))
+	stream.writeByte('2')
+	should.Equal("12", string(stream.Buffer()))
+	should.Equal(2, len(stream.buf))
+	stream.writeThreeBytes('3', '4', '5')
+	should.Equal("12345", string(stream.Buffer()))
+}
+
+func Test_writeBytes_should_grow_buffer(t *testing.T) {
+	should := require.New(t)
+	stream := NewStream(ConfigOfDefault, nil, 1)
+	stream.Write([]byte{'1', '2'})
+	should.Equal("12", string(stream.Buffer()))
+	should.Equal(3, len(stream.buf))
+	stream.Write([]byte{'3', '4', '5', '6', '7'})
+	should.Equal("1234567", string(stream.Buffer()))
+	should.Equal(8, len(stream.buf))
+}
+
+func Test_writeIndention_should_grow_buffer(t *testing.T) {
+	should := require.New(t)
+	stream := NewStream(Config{IndentionStep: 2}.Froze(), nil, 1)
+	stream.WriteVal([]int{1, 2, 3})
+	should.Equal("[\n  1,\n  2,\n  3\n]", string(stream.Buffer()))
+}
+
+func Test_writeRaw_should_grow_buffer(t *testing.T) {
+	should := require.New(t)
+	stream := NewStream(ConfigOfDefault, nil, 1)
+	stream.WriteRaw("123")
+	should.Nil(stream.Error)
+	should.Equal("123", string(stream.Buffer()))
+}
+
+func Test_writeString_should_grow_buffer(t *testing.T) {
+	should := require.New(t)
+	stream := NewStream(ConfigOfDefault, nil, 0)
+	stream.WriteString("123")
+	should.Nil(stream.Error)
+	should.Equal(`"123"`, string(stream.Buffer()))
+}

jsoniter_string_test.go

@@ -1,111 +1,183 @@
 package jsoniter
 
 import (
-	"testing"
 	"bytes"
 	"encoding/json"
+	"fmt"
+	"github.com/json-iterator/go/require"
+	"testing"
+	"unicode/utf8"
 )
 
-func Test_string_empty(t *testing.T) {
-	iter := Parse(bytes.NewBufferString(`""`), 4096)
-	val := iter.ReadString()
-	if iter.Error != nil {
-		t.Fatal(iter.Error)
+func Test_read_normal_string(t *testing.T) {
+	cases := map[string]string{
+		`"0123456789012345678901234567890123456789"`: `0123456789012345678901234567890123456789`,
+		`""`:      ``,
+		`"hello"`: `hello`,
 	}
-	if val != "" {
-		t.Fatal(val)
+	for input, output := range cases {
+		t.Run(fmt.Sprintf("%v:%v", input, output), func(t *testing.T) {
+			should := require.New(t)
+			iter := ParseString(ConfigOfDefault, input)
+			should.Equal(output, iter.ReadString())
+		})
+		t.Run(fmt.Sprintf("%v:%v", input, output), func(t *testing.T) {
+			should := require.New(t)
+			iter := Parse(ConfigOfDefault, bytes.NewBufferString(input), 2)
+			should.Equal(output, iter.ReadString())
+		})
+		t.Run(fmt.Sprintf("%v:%v", input, output), func(t *testing.T) {
+			should := require.New(t)
+			iter := ParseString(ConfigOfDefault, input)
+			should.Equal(output, string(iter.ReadStringAsSlice()))
+		})
+		t.Run(fmt.Sprintf("%v:%v", input, output), func(t *testing.T) {
+			should := require.New(t)
+			iter := Parse(ConfigOfDefault, bytes.NewBufferString(input), 2)
+			should.Equal(output, string(iter.ReadStringAsSlice()))
+		})
 	}
 }
 
-func Test_string_hello(t *testing.T) {
-	iter := Parse(bytes.NewBufferString(`"hello"`), 4096)
-	val := iter.ReadString()
-	if iter.Error != nil {
-		t.Fatal(iter.Error)
+func Test_read_exotic_string(t *testing.T) {
+	cases := map[string]string{
+		`"hel\"lo"`:      `hel"lo`,
+		`"hel\nlo"`:      "hel\nlo",
+		`"\u4e2d\u6587"`: "中文",
+		`"\ud83d\udc4a"`: "\xf0\x9f\x91\x8a", // surrogate
 	}
-	if val != "hello" {
-		t.Fatal(val)
+	for input, output := range cases {
+		t.Run(fmt.Sprintf("%v:%v", input, output), func(t *testing.T) {
+			should := require.New(t)
+			iter := ParseString(ConfigOfDefault, input)
+			should.Equal(output, iter.ReadString())
+		})
+		t.Run(fmt.Sprintf("%v:%v", input, output), func(t *testing.T) {
+			should := require.New(t)
+			iter := Parse(ConfigOfDefault, bytes.NewBufferString(input), 2)
+			should.Equal(output, iter.ReadString())
+		})
 	}
 }
 
-func Test_string_escape_quote(t *testing.T) {
-	iter := Parse(bytes.NewBufferString(`"hel\"lo"`), 4096)
-	val := iter.ReadString()
-	if iter.Error != nil {
-		t.Fatal(iter.Error)
+func Test_read_string_as_interface(t *testing.T) {
+	should := require.New(t)
+	iter := ParseString(ConfigOfDefault, `"hello"`)
+	should.Equal("hello", iter.Read())
 }
-	if val != `hel"lo` {
-		t.Fatal(val)
+
+func Test_read_string_as_any(t *testing.T) {
+	should := require.New(t)
+	any, err := UnmarshalAnyFromString(`"hello"`)
+	should.Nil(err)
+	should.Equal("hello", any.ToString())
+	should.True(any.ToBool())
+	any, err = UnmarshalAnyFromString(`" "`)
+	should.False(any.ToBool())
+	any, err = UnmarshalAnyFromString(`"false"`)
+	should.False(any.ToBool())
+	any, err = UnmarshalAnyFromString(`"123"`)
+	should.Equal(123, any.ToInt())
+}
+
+func Test_wrap_string(t *testing.T) {
+	should := require.New(t)
+	any := WrapString("123")
+	should.Equal(123, any.ToInt())
+}
+
+func Test_write_string(t *testing.T) {
+	should := require.New(t)
+	str, err := MarshalToString("hello")
+	should.Equal(`"hello"`, str)
+	should.Nil(err)
+	str, err = MarshalToString(`hel"lo`)
+	should.Equal(`"hel\"lo"`, str)
+	should.Nil(err)
+}
+
+func Test_write_val_string(t *testing.T) {
+	should := require.New(t)
+	buf := &bytes.Buffer{}
+	stream := NewStream(ConfigOfDefault, buf, 4096)
+	stream.WriteVal("hello")
+	stream.Flush()
+	should.Nil(stream.Error)
+	should.Equal(`"hello"`, buf.String())
+}
+
+func Test_decode_slash(t *testing.T) {
+	should := require.New(t)
+	var obj interface{}
+	should.NotNil(json.Unmarshal([]byte("\\"), &obj))
+	should.NotNil(UnmarshalFromString("\\", &obj))
+}
+
+func Test_html_escape(t *testing.T) {
+	should := require.New(t)
+	output, err := json.Marshal(`>`)
+	should.Nil(err)
+	should.Equal(`"\u003e"`, string(output))
+	output, err = ConfigCompatibleWithStandardLibrary.Marshal(`>`)
+	should.Nil(err)
+	should.Equal(`"\u003e"`, string(output))
+}
+
+func Test_string_encode_with_std(t *testing.T) {
+	should := require.New(t)
+	for i := 0; i < utf8.RuneSelf; i++ {
+		input := string([]byte{byte(i)})
+		stdOutputBytes, err := json.Marshal(input)
+		should.Nil(err)
+		stdOutput := string(stdOutputBytes)
+		jsoniterOutputBytes, err := ConfigCompatibleWithStandardLibrary.Marshal(input)
+		should.Nil(err)
+		jsoniterOutput := string(jsoniterOutputBytes)
+		should.Equal(stdOutput, jsoniterOutput)
 	}
 }
 
-func Test_string_escape_newline(t *testing.T) {
-	iter := Parse(bytes.NewBufferString(`"hel\nlo"`), 4096)
-	val := iter.ReadString()
-	if iter.Error != nil {
-		t.Fatal(iter.Error)
-	}
-	if val != "hel\nlo" {
-		t.Fatal(val)
-	}
-}
-
-func Test_string_escape_unicode(t *testing.T) {
-	iter := Parse(bytes.NewBufferString(`"\u4e2d\u6587"`), 4096)
-	val := iter.ReadString()
-	if iter.Error != nil {
-		t.Fatal(iter.Error)
-	}
-	if val != "中文" {
-		t.Fatal(val)
-	}
-}
-
-func Test_string_escape_unicode_with_surrogate(t *testing.T) {
-	iter := Parse(bytes.NewBufferString(`"\ud83d\udc4a"`), 4096)
-	val := iter.ReadString()
-	if iter.Error != nil {
-		t.Fatal(iter.Error)
-	}
-	if val != "\xf0\x9f\x91\x8a" {
-		t.Fatal(val)
-	}
-}
-
-func Test_string_as_bytes(t *testing.T) {
-	iter := Parse(bytes.NewBufferString(`"hello""world"`), 4096)
-	val := string(iter.readStringAsBytes())
-	if val != "hello" {
-		t.Fatal(val)
-	}
-	val = string(iter.readStringAsBytes())
-	if val != "world" {
-		t.Fatal(val)
+func Test_string_encode_with_std_without_html_escape(t *testing.T) {
+	should := require.New(t)
+	for i := 0; i < utf8.RuneSelf; i++ {
+		input := string([]byte{byte(i)})
+		buf := &bytes.Buffer{}
+		encoder := json.NewEncoder(buf)
+		encoder.SetEscapeHTML(false)
+		err := encoder.Encode(input)
+		should.Nil(err)
+		stdOutput := buf.String()
+		stdOutput = stdOutput[:len(stdOutput) - 1]
+		jsoniterOutputBytes, err := Marshal(input)
+		should.Nil(err)
+		jsoniterOutput := string(jsoniterOutputBytes)
+		should.Equal(stdOutput, jsoniterOutput)
 	}
 }
 
 func Benchmark_jsoniter_unicode(b *testing.B) {
 	for n := 0; n < b.N; n++ {
-		iter := ParseString(`"\ud83d\udc4a"`)
+		iter := ParseString(ConfigOfDefault, `"\ud83d\udc4a"`)
 		iter.ReadString()
 	}
 }
 
 func Benchmark_jsoniter_ascii(b *testing.B) {
-	iter := ParseString(`"hello, world!"`)
+	iter := NewIterator(ConfigOfDefault)
+	input := []byte(`"hello, world! hello, world!"`)
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		iter.ResetBytes(iter.buf)
+		iter.ResetBytes(input)
 		iter.ReadString()
 	}
 }
 
 func Benchmark_jsoniter_string_as_bytes(b *testing.B) {
-	iter := ParseString(`"hello, world!"`)
+	iter := ParseString(ConfigOfDefault, `"hello, world!"`)
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
 		iter.ResetBytes(iter.buf)
-		iter.readStringAsBytes()
+		iter.ReadStringAsSlice()
 	}
 }
 

output_tests/builtins/bool/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/bool/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T bool

output_tests/builtins/bool_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/bool_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T bool

output_tests/builtins/byte/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/byte/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T byte

output_tests/builtins/byte_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/byte_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T byte

output_tests/builtins/float32/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/float32/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T float32

output_tests/builtins/float32_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/float32_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T float32

output_tests/builtins/float64/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/float64/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T float64

output_tests/builtins/float64_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/float64_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T float64

output_tests/builtins/int16/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/int16/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T int16

output_tests/builtins/int16_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/int16_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T int16

output_tests/builtins/int32/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/int32/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T int32

output_tests/builtins/int32_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/int32_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T int32

output_tests/builtins/int8/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/int8/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T int8

output_tests/builtins/int8_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/int8_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T int8

output_tests/builtins/string/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/string/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T string

output_tests/builtins/string_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/string_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T string

output_tests/builtins/uint16/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/uint16/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T uint16

output_tests/builtins/uint16_alias/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}

output_tests/builtins/uint16_alias/types.go

@@ -0,0 +1,3 @@
+package test
+
+type T uint16

output_tests/builtins/uint32/json_test.go

@@ -0,0 +1,144 @@
+package test
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/davecgh/go-spew/spew"
+	fuzz "github.com/google/gofuzz"
+	jsoniter "github.com/json-iterator/go"
+)
+
+func Test_Roundtrip(t *testing.T) {
+	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
+	for i := 0; i < 1000; i++ {
+		var before T
+		fz.Fuzz(&before)
+
+		jbStd, err := json.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with stdlib: %v", err)
+		}
+		jbIter, err := jsoniter.Marshal(before)
+		if err != nil {
+			t.Errorf("failed to marshal with jsoniter: %v", err)
+		}
+		if string(jbStd) != string(jbIter) {
+			t.Errorf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
+				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
+		}
+
+		var afterStd T
+		err = json.Unmarshal(jbIter, &afterStd)
+		if err != nil {
+			t.Errorf("failed to unmarshal with stdlib: %v", err)
+		}
+		var afterIter T
+		err = jsoniter.Unmarshal(jbIter, &afterIter)
+		if err != nil {
+			t.Errorf("failed to unmarshal with jsoniter: %v", err)
+		}
+		if fingerprint(afterStd) != fingerprint(afterIter) {
+			t.Errorf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
+				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
+		}
+	}
+}
+
+const indentStr = ">  "
+
+func fingerprint(obj interface{}) string {
+	c := spew.ConfigState{
+		SortKeys: true,
+		SpewKeys: true,
+	}
+	return c.Sprintf("%v", obj)
+}
+
+func dump(obj interface{}) string {
+	cfg := spew.ConfigState{
+		Indent: indentStr,
+	}
+	return cfg.Sdump(obj)
+}
+
+func indent(src []byte, prefix string) string {
+	var buf bytes.Buffer
+	json.Indent(&buf, src, prefix, indentStr)
+	return buf.String()
+}
+
+func BenchmarkStandardMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkStandardUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = json.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}
+
+func BenchmarkJSONIterMarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var obj T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&obj)
+	for i := 0; i < t.N; i++ {
+		jb, err := jsoniter.Marshal(obj)
+		if err != nil {
+			t.Fatalf("failed to marshal:\n input: %s\n  error: %v", dump(obj), err)
+		}
+		_ = jb
+	}
+}
+
+func BenchmarkJSONIterUnmarshal(t *testing.B) {
+	t.ReportAllocs()
+	t.ResetTimer()
+
+	var before T
+	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
+	fz.Fuzz(&before)
+	jb, err := json.Marshal(before)
+	if err != nil {
+		t.Fatalf("failed to marshal: %v", err)
+	}
+
+	for i := 0; i < t.N; i++ {
+		var after T
+		err = jsoniter.Unmarshal(jb, &after)
+		if err != nil {
+			t.Fatalf("failed to unmarshal:\n  input: %q\n  error: %v", string(jb), err)
+		}
+	}
+}