cow cache is not same, as map read will modify the underlying map. use sync.Map for 1.9 and above, and mutex if sync.Map not available

Fix encoding 0-length arrays

.gitignore

@@ -1,3 +1,4 @@
-.idea
+/vendor
+/bug_test.go
 /coverage.txt
-/profile.out
+/.idea

Gopkg.lock

@@ -0,0 +1,33 @@
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+  name = "github.com/davecgh/go-spew"
+  packages = ["spew"]
+  revision = "346938d642f2ec3594ed81d874461961cd0faa76"
+  version = "v1.1.0"
+
+[[projects]]
+  branch = "master"
+  name = "github.com/google/gofuzz"
+  packages = ["."]
+  revision = "24818f796faf91cd76ec7bddd72458fbced7a6c1"
+
+[[projects]]
+  name = "github.com/pmezard/go-difflib"
+  packages = ["difflib"]
+  revision = "792786c7400a136282c1664665ae0a8db921c6c2"
+  version = "v1.0.0"
+
+[[projects]]
+  name = "github.com/stretchr/testify"
+  packages = ["assert","require"]
+  revision = "69483b4bd14f5845b5a1e55bca19e954e827f1d0"
+  version = "v1.1.4"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  inputs-digest = "f8b7cf3941d3792cbbd570bb53c093adaf774334d1162c651565c97a58dc9d09"
+  solver-name = "gps-cdcl"
+  solver-version = 1

Gopkg.toml

@@ -0,0 +1,33 @@
+# Gopkg.toml example
+#
+# Refer to https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md
+# for detailed Gopkg.toml documentation.
+#
+# required = ["github.com/user/thing/cmd/thing"]
+# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
+#
+# [[constraint]]
+#   name = "github.com/user/project"
+#   version = "1.0.0"
+#
+# [[constraint]]
+#   name = "github.com/user/project2"
+#   branch = "dev"
+#   source = "github.com/myfork/project2"
+#
+# [[override]]
+#  name = "github.com/x/y"
+#  version = "2.4.0"
+
+
+[[constraint]]
+  name = "github.com/davecgh/go-spew"
+  version = "1.1.0"
+
+[[constraint]]
+  branch = "master"
+  name = "github.com/google/gofuzz"
+
+[[constraint]]
+  name = "github.com/stretchr/testify"
+  version = "1.1.4"

README.md

@@ -44,7 +44,9 @@ with
 
 ```go
 import "github.com/json-iterator/go"
-jsoniter.Marshal(&data)
+
+var json = jsoniter.ConfigCompatibleWithStandardLibrary
+json.Marshal(&data)
 ```
 
 Replace
@@ -58,7 +60,9 @@ with
 
 ```go
 import "github.com/json-iterator/go"
-jsoniter.Unmarshal(input, &data)
+
+var json = jsoniter.ConfigCompatibleWithStandardLibrary
+json.Unmarshal(input, &data)
 ```
 
 [More documentation](http://jsoniter.com/migrate-from-go-std.html)
@@ -76,5 +80,7 @@ Contributors
 * [thockin](https://github.com/thockin) 
 * [mattn](https://github.com/mattn)
 * [cch123](https://github.com/cch123)
+* [Oleg Shaldybin](https://github.com/olegshaldybin)
+* [Jason Toffaletti](https://github.com/toffaletti)
 
 Report issue or pull request, or email taowen@gmail.com, or [![Gitter chat](https://badges.gitter.im/gitterHQ/gitter.png)](https://gitter.im/json-iterator/Lobby)

build.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+set -e
+set -x
+
+if [ ! -d /tmp/build-golang/src/github.com/json-iterator ]; then
+    mkdir -p /tmp/build-golang/src/github.com/json-iterator
+    ln -s $PWD /tmp/build-golang/src/github.com/json-iterator/go
+fi
+export GOPATH=/tmp/build-golang
+go get -u github.com/golang/dep/cmd/dep
+cd /tmp/build-golang/src/github.com/json-iterator/go
+exec $GOPATH/bin/dep ensure -update

compatible_test.go

@@ -0,0 +1,40 @@
+package jsoniter
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+// Standard Encoder has trailing newline.
+func TestEncoderHasTrailingNewline(t *testing.T) {
+	should := require.New(t)
+	var buf, stdbuf bytes.Buffer
+	enc := ConfigCompatibleWithStandardLibrary.NewEncoder(&buf)
+	enc.Encode(1)
+	stdenc := json.NewEncoder(&stdbuf)
+	stdenc.Encode(1)
+	should.Equal(stdbuf.Bytes(), buf.Bytes())
+}
+
+// Non-nil but empty map should be ignored.
+func TestOmitempty(t *testing.T) {
+	o := struct {
+		A           string            `json:"a,omitempty"`
+		B           string            `json:"b,omitempty"`
+		Annotations map[string]string `json:"annotations,omitempty"`
+	}{
+		A:           "a",
+		B:           "b",
+		Annotations: map[string]string{},
+	}
+	should := require.New(t)
+	var buf, stdbuf bytes.Buffer
+	enc := ConfigCompatibleWithStandardLibrary.NewEncoder(&buf)
+	enc.Encode(o)
+	stdenc := json.NewEncoder(&stdbuf)
+	stdenc.Encode(o)
+	should.Equal(string(stdbuf.Bytes()), string(buf.Bytes()))
+}

feature_adapter.go

@@ -71,6 +71,11 @@ type Decoder struct {
 
 // Decode decode JSON into interface{}
 func (adapter *Decoder) Decode(obj interface{}) error {
+	if adapter.iter.head == adapter.iter.tail && adapter.iter.reader != nil {
+		if !adapter.iter.loadMore() {
+			return io.EOF
+		}
+	}
 	adapter.iter.ReadVal(obj)
 	err := adapter.iter.Error
 	if err == io.EOF {
@@ -110,6 +115,7 @@ type Encoder struct {
 // Encode encode interface{} as JSON to io.Writer
 func (adapter *Encoder) Encode(val interface{}) error {
 	adapter.stream.WriteVal(val)
+	adapter.stream.WriteRaw("\n")
 	adapter.stream.Flush()
 	return adapter.stream.Error
 }
@@ -125,3 +131,8 @@ func (adapter *Encoder) SetEscapeHTML(escapeHTML bool) {
 	config.EscapeHTML = escapeHTML
 	adapter.stream.cfg = config.Froze().(*frozenConfig)
 }
+
+// Valid reports whether data is a valid JSON encoding.
+func Valid(data []byte) bool {
+	return ConfigDefault.Valid(data)
+}

feature_any.go

@@ -1,6 +1,7 @@
 package jsoniter
 
 import (
+	"errors"
 	"fmt"
 	"io"
 	"reflect"
@@ -157,6 +158,8 @@ func (iter *Iterator) readAny() Any {
 		return iter.readArrayAny()
 	case '-':
 		return iter.readNumberAny(false)
+	case 0:
+		return &invalidAny{baseAny{}, errors.New("input is empty")}
 	default:
 		return iter.readNumberAny(true)
 	}

feature_any_number.go

@@ -1,6 +1,9 @@
 package jsoniter
 
-import "unsafe"
+import (
+	"unsafe"
+	"io"
+)
 
 type numberLazyAny struct {
 	baseAny
@@ -29,7 +32,9 @@ func (any *numberLazyAny) ToInt() int {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadInt()
+	if iter.Error != nil && iter.Error != io.EOF {
 		any.err = iter.Error
+	}
 	return val
 }
 
@@ -37,7 +42,9 @@ func (any *numberLazyAny) ToInt32() int32 {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadInt32()
+	if iter.Error != nil && iter.Error != io.EOF {
 		any.err = iter.Error
+	}
 	return val
 }
 
@@ -45,7 +52,9 @@ func (any *numberLazyAny) ToInt64() int64 {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadInt64()
+	if iter.Error != nil && iter.Error != io.EOF {
 		any.err = iter.Error
+	}
 	return val
 }
 
@@ -53,7 +62,9 @@ func (any *numberLazyAny) ToUint() uint {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadUint()
+	if iter.Error != nil && iter.Error != io.EOF {
 		any.err = iter.Error
+	}
 	return val
 }
 
@@ -61,7 +72,9 @@ func (any *numberLazyAny) ToUint32() uint32 {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadUint32()
+	if iter.Error != nil && iter.Error != io.EOF {
 		any.err = iter.Error
+	}
 	return val
 }
 
@@ -69,7 +82,9 @@ func (any *numberLazyAny) ToUint64() uint64 {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadUint64()
+	if iter.Error != nil && iter.Error != io.EOF {
 		any.err = iter.Error
+	}
 	return val
 }
 
@@ -77,7 +92,9 @@ func (any *numberLazyAny) ToFloat32() float32 {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadFloat32()
+	if iter.Error != nil && iter.Error != io.EOF {
 		any.err = iter.Error
+	}
 	return val
 }
 
@@ -85,7 +102,9 @@ func (any *numberLazyAny) ToFloat64() float64 {
 	iter := any.cfg.BorrowIterator(any.buf)
 	defer any.cfg.ReturnIterator(iter)
 	val := iter.ReadFloat64()
+	if iter.Error != nil && iter.Error != io.EOF {
 		any.err = iter.Error
+	}
 	return val
 }
 

feature_config.go

@@ -5,7 +5,6 @@ import (
 	"errors"
 	"io"
 	"reflect"
-	"sync/atomic"
 	"unsafe"
 )
 
@@ -18,18 +17,9 @@ type Config struct {
 	SortMapKeys                   bool
 	UseNumber                     bool
 	TagKey                        string
+	OnlyTaggedField               bool
 	ValidateJsonRawMessage        bool
-}
-
-type frozenConfig struct {
-	configBeforeFrozen Config
-	sortMapKeys        bool
-	indentionStep      int
-	decoderCache       unsafe.Pointer
-	encoderCache       unsafe.Pointer
-	extensions         []Extension
-	streamPool         chan *Stream
-	iteratorPool       chan *Iterator
+	ObjectFieldMustBeSimpleString bool
 }
 
 // API the public interface of this package.
@@ -45,6 +35,8 @@ type API interface {
 	Get(data []byte, path ...interface{}) Any
 	NewEncoder(writer io.Writer) *Encoder
 	NewDecoder(reader io.Reader) *Decoder
+	Valid(data []byte) bool
+	RegisterExtension(extension Extension)
 }
 
 // ConfigDefault the default API
@@ -62,7 +54,8 @@ var ConfigCompatibleWithStandardLibrary = Config{
 // ConfigFastest marshals float with only 6 digits precision
 var ConfigFastest = Config{
 	EscapeHTML:                    false,
-	MarshalFloatWith6Digits: true,
+	MarshalFloatWith6Digits:       true, // will lose precession
+	ObjectFieldMustBeSimpleString: true, // do not unescape object field
 }.Froze()
 
 // Froze forge API from config
@@ -71,11 +64,12 @@ func (cfg Config) Froze() API {
 	frozenConfig := &frozenConfig{
 		sortMapKeys:                   cfg.SortMapKeys,
 		indentionStep:                 cfg.IndentionStep,
+		objectFieldMustBeSimpleString: cfg.ObjectFieldMustBeSimpleString,
+		onlyTaggedField:               cfg.OnlyTaggedField,
 		streamPool:                    make(chan *Stream, 16),
 		iteratorPool:                  make(chan *Iterator, 16),
 	}
-	atomic.StorePointer(&frozenConfig.decoderCache, unsafe.Pointer(&map[string]ValDecoder{}))
-	atomic.StorePointer(&frozenConfig.encoderCache, unsafe.Pointer(&map[string]ValEncoder{}))
+	frozenConfig.initCache()
 	if cfg.MarshalFloatWith6Digits {
 		frozenConfig.marshalFloatWith6Digits()
 	}
@@ -127,7 +121,7 @@ func (cfg *frozenConfig) getTagKey() string {
 	return tagKey
 }
 
-func (cfg *frozenConfig) registerExtension(extension Extension) {
+func (cfg *frozenConfig) RegisterExtension(extension Extension) {
 	cfg.extensions = append(cfg.extensions, extension)
 }
 
@@ -189,46 +183,6 @@ func (cfg *frozenConfig) escapeHTML() {
 	cfg.addEncoderToCache(reflect.TypeOf((*string)(nil)).Elem(), &htmlEscapedStringEncoder{})
 }
 
-func (cfg *frozenConfig) addDecoderToCache(cacheKey reflect.Type, decoder ValDecoder) {
-	done := false
-	for !done {
-		ptr := atomic.LoadPointer(&cfg.decoderCache)
-		cache := *(*map[reflect.Type]ValDecoder)(ptr)
-		copied := map[reflect.Type]ValDecoder{}
-		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 ValEncoder) {
-	done := false
-	for !done {
-		ptr := atomic.LoadPointer(&cfg.encoderCache)
-		cache := *(*map[reflect.Type]ValEncoder)(ptr)
-		copied := map[reflect.Type]ValEncoder{}
-		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) ValDecoder {
-	ptr := atomic.LoadPointer(&cfg.decoderCache)
-	cache := *(*map[reflect.Type]ValDecoder)(ptr)
-	return cache[cacheKey]
-}
-
-func (cfg *frozenConfig) getEncoderFromCache(cacheKey reflect.Type) ValEncoder {
-	ptr := atomic.LoadPointer(&cfg.encoderCache)
-	cache := *(*map[reflect.Type]ValEncoder)(ptr)
-	return cache[cacheKey]
-}
-
 func (cfg *frozenConfig) cleanDecoders() {
 	typeDecoders = map[string]ValDecoder{}
 	fieldDecoders = map[string]ValDecoder{}
@@ -333,3 +287,10 @@ func (cfg *frozenConfig) NewDecoder(reader io.Reader) *Decoder {
 	iter := Parse(cfg, reader, 512)
 	return &Decoder{iter}
 }
+
+func (cfg *frozenConfig) Valid(data []byte) bool {
+	iter := cfg.BorrowIterator(data)
+	defer cfg.ReturnIterator(iter)
+	iter.Skip()
+	return iter.Error == nil
+}

feature_config_with_sync_map.go

@@ -0,0 +1,51 @@
+//+build go1.9
+
+package jsoniter
+
+import (
+	"reflect"
+	"sync"
+)
+
+type frozenConfig struct {
+	configBeforeFrozen            Config
+	sortMapKeys                   bool
+	indentionStep                 int
+	objectFieldMustBeSimpleString bool
+	onlyTaggedField               bool
+	decoderCache                  sync.Map
+	encoderCache                  sync.Map
+	extensions                    []Extension
+	streamPool                    chan *Stream
+	iteratorPool                  chan *Iterator
+}
+
+func (cfg *frozenConfig) initCache() {
+	cfg.decoderCache = sync.Map{}
+	cfg.encoderCache = sync.Map{}
+}
+
+
+func (cfg *frozenConfig) addDecoderToCache(cacheKey reflect.Type, decoder ValDecoder) {
+	cfg.decoderCache.Store(cacheKey, decoder)
+}
+
+func (cfg *frozenConfig) addEncoderToCache(cacheKey reflect.Type, encoder ValEncoder) {
+	cfg.encoderCache.Store(cacheKey, encoder)
+}
+
+func (cfg *frozenConfig) getDecoderFromCache(cacheKey reflect.Type) ValDecoder {
+	decoder, found := cfg.decoderCache.Load(cacheKey)
+	if found {
+		return decoder.(ValDecoder)
+	}
+	return nil
+}
+
+func (cfg *frozenConfig) getEncoderFromCache(cacheKey reflect.Type) ValEncoder {
+	encoder, found := cfg.encoderCache.Load(cacheKey)
+	if found {
+		return encoder.(ValEncoder)
+	}
+	return nil
+}

feature_config_without_sync_map.go

@@ -0,0 +1,54 @@
+//+build !go1.9
+
+package jsoniter
+
+import (
+	"reflect"
+	"sync"
+)
+
+type frozenConfig struct {
+	configBeforeFrozen            Config
+	sortMapKeys                   bool
+	indentionStep                 int
+	objectFieldMustBeSimpleString bool
+	onlyTaggedField               bool
+	cacheLock                     *sync.RWMutex
+	decoderCache                  map[reflect.Type]ValDecoder
+	encoderCache                  map[reflect.Type]ValEncoder
+	extensions                    []Extension
+	streamPool                    chan *Stream
+	iteratorPool                  chan *Iterator
+}
+
+func (cfg *frozenConfig) initCache() {
+	cfg.cacheLock = &sync.RWMutex{}
+	cfg.decoderCache = map[reflect.Type]ValDecoder{}
+	cfg.encoderCache = map[reflect.Type]ValEncoder{}
+}
+
+func (cfg *frozenConfig) addDecoderToCache(cacheKey reflect.Type, decoder ValDecoder) {
+	cfg.cacheLock.Lock()
+	cfg.decoderCache[cacheKey] = decoder
+	cfg.cacheLock.Unlock()
+}
+
+func (cfg *frozenConfig) addEncoderToCache(cacheKey reflect.Type, encoder ValEncoder) {
+	cfg.cacheLock.Lock()
+	cfg.encoderCache[cacheKey] = encoder
+	cfg.cacheLock.Unlock()
+}
+
+func (cfg *frozenConfig) getDecoderFromCache(cacheKey reflect.Type) ValDecoder {
+	cfg.cacheLock.RLock()
+	decoder, _ := cfg.decoderCache[cacheKey].(ValDecoder)
+	cfg.cacheLock.RUnlock()
+	return decoder
+}
+
+func (cfg *frozenConfig) getEncoderFromCache(cacheKey reflect.Type) ValEncoder {
+	cfg.cacheLock.RLock()
+	encoder, _ := cfg.encoderCache[cacheKey].(ValEncoder)
+	cfg.cacheLock.RUnlock()
+	return encoder
+}

feature_iter.go

@@ -77,6 +77,7 @@ type Iterator struct {
 	captureStartedAt int
 	captured         []byte
 	Error            error
+	Attachment       interface{} // open for customized decoder
 }
 
 // NewIterator creates an empty Iterator instance
@@ -167,7 +168,7 @@ func (iter *Iterator) isObjectEnd() bool {
 	if c == '}' {
 		return true
 	}
-	iter.ReportError("isObjectEnd", "object ended prematurely")
+	iter.ReportError("isObjectEnd", "object ended prematurely, unexpected char "+string([]byte{c}))
 	return true
 }
 
@@ -200,8 +201,22 @@ func (iter *Iterator) ReportError(operation string, msg string) {
 	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]))
+	peekEnd := iter.head + 10
+	if peekEnd > iter.tail {
+		peekEnd = iter.tail
+	}
+	parsing := string(iter.buf[peekStart:peekEnd])
+	contextStart := iter.head - 50
+	if contextStart < 0 {
+		contextStart = 0
+	}
+	contextEnd := iter.head + 50
+	if contextEnd > iter.tail {
+		contextEnd = iter.tail
+	}
+	context := string(iter.buf[contextStart:contextEnd])
+	iter.Error = fmt.Errorf("%s: %s, error found in #%v byte of ...|%s|..., bigger context ...|%s|...",
+		operation, msg, iter.head-peekStart, parsing, context)
 }
 
 // CurrentBuffer gets current buffer as string for debugging purpose
@@ -210,7 +225,7 @@ func (iter *Iterator) CurrentBuffer() string {
 	if peekStart < 0 {
 		peekStart = 0
 	}
-	return fmt.Sprintf("parsing %v ...|%s|... at %s", iter.head,
+	return fmt.Sprintf("parsing #%v byte, around ...|%s|..., whole buffer ...|%s|...", iter.head,
 		string(iter.buf[peekStart:iter.head]), string(iter.buf[0:iter.tail]))
 }
 

feature_iter_array.go

@@ -19,7 +19,7 @@ func (iter *Iterator) ReadArray() (ret bool) {
 	case ',':
 		return true
 	default:
-		iter.ReportError("ReadArray", "expect [ or , or ] or n, but found: "+string([]byte{c}))
+		iter.ReportError("ReadArray", "expect [ or , or ] or n, but found "+string([]byte{c}))
 		return
 	}
 }
@@ -42,7 +42,7 @@ func (iter *Iterator) ReadArrayCB(callback func(*Iterator) bool) (ret bool) {
 				c = iter.nextToken()
 			}
 			if c != ']' {
-				iter.ReportError("ReadArrayCB", "expect ] in the end")
+				iter.ReportError("ReadArrayCB", "expect ] in the end, but found "+string([]byte{c}))
 				return false
 			}
 			return true
@@ -53,6 +53,6 @@ func (iter *Iterator) ReadArrayCB(callback func(*Iterator) bool) (ret bool) {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return true // null
 	}
-	iter.ReportError("ReadArrayCB", "expect [ or n, but found: "+string([]byte{c}))
+	iter.ReportError("ReadArrayCB", "expect [ or n, but found "+string([]byte{c}))
 	return false
 }

feature_iter_float.go

@@ -1,6 +1,7 @@
 package jsoniter
 
 import (
+	"encoding/json"
 	"io"
 	"math/big"
 	"strconv"
@@ -339,3 +340,8 @@ func validateFloat(str string) string {
 	}
 	return ""
 }
+
+// ReadNumber read json.Number
+func (iter *Iterator) ReadNumber() (ret json.Number) {
+	return json.Number(iter.readNumberAsString())
+}

feature_iter_int.go

@@ -115,6 +115,7 @@ func (iter *Iterator) ReadUint32() (ret uint32) {
 func (iter *Iterator) readUint32(c byte) (ret uint32) {
 	ind := intDigits[c]
 	if ind == 0 {
+		iter.assertInteger()
 		return 0 // single zero
 	}
 	if ind == invalidCharForNumber {
@@ -127,12 +128,14 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 		ind2 := intDigits[iter.buf[i]]
 		if ind2 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value
 		}
 		i++
 		ind3 := intDigits[iter.buf[i]]
 		if ind3 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value*10 + uint32(ind2)
 		}
 		//iter.head = i + 1
@@ -141,30 +144,35 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 		ind4 := intDigits[iter.buf[i]]
 		if ind4 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value*100 + uint32(ind2)*10 + uint32(ind3)
 		}
 		i++
 		ind5 := intDigits[iter.buf[i]]
 		if ind5 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			return value*1000 + uint32(ind2)*100 + uint32(ind3)*10 + uint32(ind4)
 		}
 		i++
 		ind6 := intDigits[iter.buf[i]]
 		if ind6 == invalidCharForNumber {
 			iter.head = i
+			iter.assertInteger()
 			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
+			iter.assertInteger()
 			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
+			iter.assertInteger()
 			return value*1000000 + uint32(ind2)*100000 + uint32(ind3)*10000 + uint32(ind4)*1000 + uint32(ind5)*100 + uint32(ind6)*10 + uint32(ind7)
 		}
 		i++
@@ -172,6 +180,7 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 		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 {
+			iter.assertInteger()
 			return value
 		}
 	}
@@ -180,6 +189,7 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 			ind = intDigits[iter.buf[i]]
 			if ind == invalidCharForNumber {
 				iter.head = i
+				iter.assertInteger()
 				return value
 			}
 			if value > uint32SafeToMultiply10 {
@@ -194,6 +204,7 @@ func (iter *Iterator) readUint32(c byte) (ret uint32) {
 			value = (value << 3) + (value << 1) + uint32(ind)
 		}
 		if !iter.loadMore() {
+			iter.assertInteger()
 			return value
 		}
 	}
@@ -226,6 +237,7 @@ func (iter *Iterator) ReadUint64() uint64 {
 func (iter *Iterator) readUint64(c byte) (ret uint64) {
 	ind := intDigits[c]
 	if ind == 0 {
+		iter.assertInteger()
 		return 0 // single zero
 	}
 	if ind == invalidCharForNumber {
@@ -233,11 +245,73 @@ func (iter *Iterator) readUint64(c byte) (ret uint64) {
 		return
 	}
 	value := uint64(ind)
+	if iter.tail-iter.head > 10 {
+		i := iter.head
+		ind2 := intDigits[iter.buf[i]]
+		if ind2 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value
+		}
+		i++
+		ind3 := intDigits[iter.buf[i]]
+		if ind3 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*10 + uint64(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
+			iter.assertInteger()
+			return value*100 + uint64(ind2)*10 + uint64(ind3)
+		}
+		i++
+		ind5 := intDigits[iter.buf[i]]
+		if ind5 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*1000 + uint64(ind2)*100 + uint64(ind3)*10 + uint64(ind4)
+		}
+		i++
+		ind6 := intDigits[iter.buf[i]]
+		if ind6 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*10000 + uint64(ind2)*1000 + uint64(ind3)*100 + uint64(ind4)*10 + uint64(ind5)
+		}
+		i++
+		ind7 := intDigits[iter.buf[i]]
+		if ind7 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*100000 + uint64(ind2)*10000 + uint64(ind3)*1000 + uint64(ind4)*100 + uint64(ind5)*10 + uint64(ind6)
+		}
+		i++
+		ind8 := intDigits[iter.buf[i]]
+		if ind8 == invalidCharForNumber {
+			iter.head = i
+			iter.assertInteger()
+			return value*1000000 + uint64(ind2)*100000 + uint64(ind3)*10000 + uint64(ind4)*1000 + uint64(ind5)*100 + uint64(ind6)*10 + uint64(ind7)
+		}
+		i++
+		ind9 := intDigits[iter.buf[i]]
+		value = value*10000000 + uint64(ind2)*1000000 + uint64(ind3)*100000 + uint64(ind4)*10000 + uint64(ind5)*1000 + uint64(ind6)*100 + uint64(ind7)*10 + uint64(ind8)
+		iter.head = i
+		if ind9 == invalidCharForNumber {
+			iter.assertInteger()
+			return value
+		}
+	}
 	for {
 		for i := iter.head; i < iter.tail; i++ {
 			ind = intDigits[iter.buf[i]]
 			if ind == invalidCharForNumber {
 				iter.head = i
+				iter.assertInteger()
 				return value
 			}
 			if value > uint64SafeToMultiple10 {
@@ -252,7 +326,14 @@ func (iter *Iterator) readUint64(c byte) (ret uint64) {
 			value = (value << 3) + (value << 1) + uint64(ind)
 		}
 		if !iter.loadMore() {
+			iter.assertInteger()
 			return value
 		}
 	}
 }
+
+func (iter *Iterator) assertInteger() {
+	if iter.head < len(iter.buf) && iter.buf[iter.head] == '.' {
+		iter.ReportError("assertInteger", "can not decode float as int")
+	}
+}

feature_iter_object.go

@@ -19,15 +19,33 @@ func (iter *Iterator) ReadObject() (ret string) {
 		c = iter.nextToken()
 		if c == '"' {
 			iter.unreadByte()
+			if iter.cfg.objectFieldMustBeSimpleString {
 				return string(iter.readObjectFieldAsBytes())
+			} else {
+				field := iter.ReadString()
+				c = iter.nextToken()
+				if c != ':' {
+					iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+				}
+				return field
+			}
 		}
 		if c == '}' {
 			return "" // end of object
 		}
-		iter.ReportError("ReadObject", `expect " after {`)
+		iter.ReportError("ReadObject", `expect " after {, but found `+string([]byte{c}))
 		return
 	case ',':
+		if iter.cfg.objectFieldMustBeSimpleString {
 			return string(iter.readObjectFieldAsBytes())
+		} else {
+			field := iter.ReadString()
+			c = iter.nextToken()
+			if c != ':' {
+				iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+			}
+			return field
+		}
 	case '}':
 		return "" // end of object
 	default:
@@ -44,17 +62,34 @@ func (iter *Iterator) readFieldHash() int32 {
 			for i := iter.head; i < iter.tail; i++ {
 				// require ascii string and no escape
 				b := iter.buf[i]
+				if !iter.cfg.objectFieldMustBeSimpleString && b == '\\' {
+					iter.head = i
+					for _, b := range iter.readStringSlowPath() {
 						if 'A' <= b && b <= 'Z' {
 							b += 'a' - 'A'
 						}
+						hash ^= int64(b)
+						hash *= 0x1000193
+					}
+					c = iter.nextToken()
+					if c != ':' {
+						iter.ReportError("readFieldHash", `expect :, but found `+string([]byte{c}))
+						return 0
+					}
+					return int32(hash)
+				}
 				if b == '"' {
 					iter.head = i + 1
 					c = iter.nextToken()
 					if c != ':' {
 						iter.ReportError("readFieldHash", `expect :, but found `+string([]byte{c}))
+						return 0
 					}
 					return int32(hash)
 				}
+				if 'A' <= b && b <= 'Z' {
+					b += 'a' - 'A'
+				}
 				hash ^= int64(b)
 				hash *= 0x1000193
 			}
@@ -80,18 +115,38 @@ func calcHash(str string) int32 {
 // ReadObjectCB read object with callback, the key is ascii only and field name not copied
 func (iter *Iterator) ReadObjectCB(callback func(*Iterator, string) bool) bool {
 	c := iter.nextToken()
+	var fieldBytes []byte
+	var field string
 	if c == '{' {
 		c = iter.nextToken()
 		if c == '"' {
 			iter.unreadByte()
-			field := iter.readObjectFieldAsBytes()
-			if !callback(iter, *(*string)(unsafe.Pointer(&field))) {
+			if iter.cfg.objectFieldMustBeSimpleString {
+				fieldBytes = iter.readObjectFieldAsBytes()
+				field = *(*string)(unsafe.Pointer(&fieldBytes))
+			} else {
+				field = iter.ReadString()
+				c = iter.nextToken()
+				if c != ':' {
+					iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+				}
+			}
+			if !callback(iter, field) {
 				return false
 			}
 			c = iter.nextToken()
 			for c == ',' {
-				field = iter.readObjectFieldAsBytes()
-				if !callback(iter, *(*string)(unsafe.Pointer(&field))) {
+				if iter.cfg.objectFieldMustBeSimpleString {
+					fieldBytes = iter.readObjectFieldAsBytes()
+					field = *(*string)(unsafe.Pointer(&fieldBytes))
+				} else {
+					field = iter.ReadString()
+					c = iter.nextToken()
+					if c != ':' {
+						iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+					}
+				}
+				if !callback(iter, field) {
 					return false
 				}
 				c = iter.nextToken()
@@ -105,14 +160,14 @@ func (iter *Iterator) ReadObjectCB(callback func(*Iterator, string) bool) bool {
 		if c == '}' {
 			return true
 		}
-		iter.ReportError("ReadObjectCB", `expect " after }`)
+		iter.ReportError("ReadObjectCB", `expect " after }, but found `+string([]byte{c}))
 		return false
 	}
 	if c == 'n' {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return true // null
 	}
-	iter.ReportError("ReadObjectCB", `expect { or n`)
+	iter.ReportError("ReadObjectCB", `expect { or n, but found `+string([]byte{c}))
 	return false
 }
 
@@ -125,7 +180,7 @@ func (iter *Iterator) ReadMapCB(callback func(*Iterator, string) bool) bool {
 			iter.unreadByte()
 			field := iter.ReadString()
 			if iter.nextToken() != ':' {
-				iter.ReportError("ReadMapCB", "expect : after object field")
+				iter.ReportError("ReadMapCB", "expect : after object field, but found "+string([]byte{c}))
 				return false
 			}
 			if !callback(iter, field) {
@@ -135,7 +190,7 @@ func (iter *Iterator) ReadMapCB(callback func(*Iterator, string) bool) bool {
 			for c == ',' {
 				field = iter.ReadString()
 				if iter.nextToken() != ':' {
-					iter.ReportError("ReadMapCB", "expect : after object field")
+					iter.ReportError("ReadMapCB", "expect : after object field, but found "+string([]byte{c}))
 					return false
 				}
 				if !callback(iter, field) {
@@ -152,14 +207,14 @@ func (iter *Iterator) ReadMapCB(callback func(*Iterator, string) bool) bool {
 		if c == '}' {
 			return true
 		}
-		iter.ReportError("ReadMapCB", `expect " after }`)
+		iter.ReportError("ReadMapCB", `expect " after }, but found `+string([]byte{c}))
 		return false
 	}
 	if c == 'n' {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return true // null
 	}
-	iter.ReportError("ReadMapCB", `expect { or n`)
+	iter.ReportError("ReadMapCB", `expect { or n, but found `+string([]byte{c}))
 	return false
 }
 
@@ -176,7 +231,7 @@ func (iter *Iterator) readObjectStart() bool {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return false
 	}
-	iter.ReportError("readObjectStart", "expect { or n")
+	iter.ReportError("readObjectStart", "expect { or n, but found "+string([]byte{c}))
 	return false
 }
 
@@ -192,7 +247,7 @@ func (iter *Iterator) readObjectFieldAsBytes() (ret []byte) {
 		}
 	}
 	if iter.buf[iter.head] != ':' {
-		iter.ReportError("readObjectFieldAsBytes", "expect : after object field")
+		iter.ReportError("readObjectFieldAsBytes", "expect : after object field, but found "+string([]byte{iter.buf[iter.head]}))
 		return
 	}
 	iter.head++

feature_iter_skip.go

@@ -25,7 +25,7 @@ func (iter *Iterator) ReadBool() (ret bool) {
 		iter.skipFourBytes('a', 'l', 's', 'e')
 		return false
 	}
-	iter.ReportError("ReadBool", "expect t or f")
+	iter.ReportError("ReadBool", "expect t or f, but found "+string([]byte{c}))
 	return
 }
 
@@ -59,7 +59,9 @@ func (iter *Iterator) stopCapture() []byte {
 	iter.captureStartedAt = -1
 	iter.captured = nil
 	if len(captured) == 0 {
-		return remaining
+		copied := make([]byte, len(remaining))
+		copy(copied, remaining)
+		return copied
 	}
 	captured = append(captured, remaining...)
 	return captured

feature_iter_skip_sloppy.go

@@ -1,4 +1,4 @@
-//+build jsoniter-sloppy
+//+build jsoniter_sloppy
 
 package jsoniter
 

feature_iter_skip_strict.go

@@ -1,4 +1,4 @@
-//+build !jsoniter-sloppy
+//+build !jsoniter_sloppy
 
 package jsoniter
 

feature_iter_string.go

@@ -28,7 +28,7 @@ func (iter *Iterator) ReadString() (ret string) {
 		iter.skipThreeBytes('u', 'l', 'l')
 		return ""
 	}
-	iter.ReportError("ReadString", `expects " or n`)
+	iter.ReportError("ReadString", `expects " or n, but found `+string([]byte{c}))
 	return
 }
 
@@ -139,7 +139,7 @@ func (iter *Iterator) ReadStringAsSlice() (ret []byte) {
 		}
 		return copied
 	}
-	iter.ReportError("ReadStringAsSlice", `expects " or n`)
+	iter.ReportError("ReadStringAsSlice", `expects " or n, but found `+string([]byte{c}))
 	return
 }
 
@@ -156,7 +156,7 @@ func (iter *Iterator) readU4() (ret rune) {
 		} else if c >= 'A' && c <= 'F' {
 			ret = ret*16 + rune(c-'A'+10)
 		} else {
-			iter.ReportError("readU4", "expects 0~9 or a~f")
+			iter.ReportError("readU4", "expects 0~9 or a~f, but found "+string([]byte{c}))
 			return
 		}
 	}

feature_json_number.go

@@ -1,9 +1,25 @@
 package jsoniter
 
-import "encoding/json"
+import (
+	"encoding/json"
+	"strconv"
+)
 
 type Number string
 
+// String returns the literal text of the number.
+func (n Number) String() string { return string(n) }
+
+// Float64 returns the number as a float64.
+func (n Number) Float64() (float64, error) {
+	return strconv.ParseFloat(string(n), 64)
+}
+
+// Int64 returns the number as an int64.
+func (n Number) Int64() (int64, error) {
+	return strconv.ParseInt(string(n), 10, 64)
+}
+
 func CastJsonNumber(val interface{}) (string, bool) {
 	switch typedVal := val.(type) {
 	case json.Number:

feature_pool.go

@@ -28,6 +28,7 @@ func (cfg *frozenConfig) BorrowStream(writer io.Writer) *Stream {
 
 func (cfg *frozenConfig) ReturnStream(stream *Stream) {
 	stream.Error = nil
+	stream.Attachment = nil
 	select {
 	case cfg.streamPool <- stream:
 		return
@@ -48,6 +49,7 @@ func (cfg *frozenConfig) BorrowIterator(data []byte) *Iterator {
 
 func (cfg *frozenConfig) ReturnIterator(iter *Iterator) {
 	iter.Error = nil
+	iter.Attachment = nil
 	select {
 	case cfg.iteratorPool <- iter:
 		return

feature_reflect_array.go

@@ -7,23 +7,34 @@ import (
 	"unsafe"
 )
 
-func decoderOfArray(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
-	decoder, err := decoderOfType(cfg, typ.Elem())
-	if err != nil {
-		return nil, err
-	}
-	return &arrayDecoder{typ, typ.Elem(), decoder}, nil
+func decoderOfArray(cfg *frozenConfig, prefix string, typ reflect.Type) ValDecoder {
+	decoder := decoderOfType(cfg, prefix+"[array]->", typ.Elem())
+	return &arrayDecoder{typ, typ.Elem(), decoder}
 }
 
-func encoderOfArray(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
-	encoder, err := encoderOfType(cfg, typ.Elem())
-	if err != nil {
-		return nil, err
+func encoderOfArray(cfg *frozenConfig, prefix string, typ reflect.Type) ValEncoder {
+	if typ.Len() == 0 {
+		return emptyArrayEncoder{}
 	}
+	encoder := encoderOfType(cfg, prefix+"[array]->", typ.Elem())
 	if typ.Elem().Kind() == reflect.Map {
-		encoder = &optionalEncoder{encoder}
+		encoder = &OptionalEncoder{encoder}
 	}
-	return &arrayEncoder{typ, typ.Elem(), encoder}, nil
+	return &arrayEncoder{typ, typ.Elem(), encoder}
+}
+
+type emptyArrayEncoder struct{}
+
+func (encoder emptyArrayEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	stream.WriteEmptyArray()
+}
+
+func (encoder emptyArrayEncoder) EncodeInterface(val interface{}, stream *Stream) {
+	stream.WriteEmptyArray()
+}
+
+func (encoder emptyArrayEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return true
 }
 
 type arrayEncoder struct {

feature_reflect_extension.go

@@ -161,22 +161,31 @@ func RegisterExtension(extension Extension) {
 	extensions = append(extensions, extension)
 }
 
-func getTypeDecoderFromExtension(typ reflect.Type) ValDecoder {
-	decoder := _getTypeDecoderFromExtension(typ)
+func getTypeDecoderFromExtension(cfg *frozenConfig, typ reflect.Type) ValDecoder {
+	decoder := _getTypeDecoderFromExtension(cfg, typ)
 	if decoder != nil {
 		for _, extension := range extensions {
 			decoder = extension.DecorateDecoder(typ, decoder)
 		}
+		for _, extension := range cfg.extensions {
+			decoder = extension.DecorateDecoder(typ, decoder)
+		}
 	}
 	return decoder
 }
-func _getTypeDecoderFromExtension(typ reflect.Type) ValDecoder {
+func _getTypeDecoderFromExtension(cfg *frozenConfig, typ reflect.Type) ValDecoder {
 	for _, extension := range extensions {
 		decoder := extension.CreateDecoder(typ)
 		if decoder != nil {
 			return decoder
 		}
 	}
+	for _, extension := range cfg.extensions {
+		decoder := extension.CreateDecoder(typ)
+		if decoder != nil {
+			return decoder
+		}
+	}
 	typeName := typ.String()
 	decoder := typeDecoders[typeName]
 	if decoder != nil {
@@ -185,29 +194,38 @@ func _getTypeDecoderFromExtension(typ reflect.Type) ValDecoder {
 	if typ.Kind() == reflect.Ptr {
 		decoder := typeDecoders[typ.Elem().String()]
 		if decoder != nil {
-			return &optionalDecoder{typ.Elem(), decoder}
+			return &OptionalDecoder{typ.Elem(), decoder}
 		}
 	}
 	return nil
 }
 
-func getTypeEncoderFromExtension(typ reflect.Type) ValEncoder {
-	encoder := _getTypeEncoderFromExtension(typ)
+func getTypeEncoderFromExtension(cfg *frozenConfig, typ reflect.Type) ValEncoder {
+	encoder := _getTypeEncoderFromExtension(cfg, typ)
 	if encoder != nil {
 		for _, extension := range extensions {
 			encoder = extension.DecorateEncoder(typ, encoder)
 		}
+		for _, extension := range cfg.extensions {
+			encoder = extension.DecorateEncoder(typ, encoder)
+		}
 	}
 	return encoder
 }
 
-func _getTypeEncoderFromExtension(typ reflect.Type) ValEncoder {
+func _getTypeEncoderFromExtension(cfg *frozenConfig, typ reflect.Type) ValEncoder {
 	for _, extension := range extensions {
 		encoder := extension.CreateEncoder(typ)
 		if encoder != nil {
 			return encoder
 		}
 	}
+	for _, extension := range cfg.extensions {
+		encoder := extension.CreateEncoder(typ)
+		if encoder != nil {
+			return encoder
+		}
+	}
 	typeName := typ.String()
 	encoder := typeEncoders[typeName]
 	if encoder != nil {
@@ -216,28 +234,28 @@ func _getTypeEncoderFromExtension(typ reflect.Type) ValEncoder {
 	if typ.Kind() == reflect.Ptr {
 		encoder := typeEncoders[typ.Elem().String()]
 		if encoder != nil {
-			return &optionalEncoder{encoder}
+			return &OptionalEncoder{encoder}
 		}
 	}
 	return nil
 }
 
-func describeStruct(cfg *frozenConfig, typ reflect.Type) (*StructDescriptor, error) {
+func describeStruct(cfg *frozenConfig, prefix string, typ reflect.Type) *StructDescriptor {
 	embeddedBindings := []*Binding{}
 	bindings := []*Binding{}
 	for i := 0; i < typ.NumField(); i++ {
 		field := typ.Field(i)
-		tag := field.Tag.Get(cfg.getTagKey())
+		tag, hastag := field.Tag.Lookup(cfg.getTagKey())
+		if cfg.onlyTaggedField && !hastag {
+			continue
+		}
 		tagParts := strings.Split(tag, ",")
 		if tag == "-" {
 			continue
 		}
 		if field.Anonymous && (tag == "" || tagParts[0] == "") {
 			if field.Type.Kind() == reflect.Struct {
-				structDescriptor, err := describeStruct(cfg, field.Type)
-				if err != nil {
-					return nil, err
-				}
+				structDescriptor := describeStruct(cfg, prefix, field.Type)
 				for _, binding := range structDescriptor.Fields {
 					binding.levels = append([]int{i}, binding.levels...)
 					omitempty := binding.Encoder.(*structFieldEncoder).omitempty
@@ -247,16 +265,13 @@ func describeStruct(cfg *frozenConfig, typ reflect.Type) (*StructDescriptor, err
 				}
 				continue
 			} else if field.Type.Kind() == reflect.Ptr && field.Type.Elem().Kind() == reflect.Struct {
-				structDescriptor, err := describeStruct(cfg, field.Type.Elem())
-				if err != nil {
-					return nil, err
-				}
+				structDescriptor := describeStruct(cfg, prefix, field.Type.Elem())
 				for _, binding := range structDescriptor.Fields {
 					binding.levels = append([]int{i}, binding.levels...)
 					omitempty := binding.Encoder.(*structFieldEncoder).omitempty
-					binding.Encoder = &optionalEncoder{binding.Encoder}
+					binding.Encoder = &dereferenceEncoder{binding.Encoder}
 					binding.Encoder = &structFieldEncoder{&field, binding.Encoder, omitempty}
-					binding.Decoder = &deferenceDecoder{field.Type.Elem(), binding.Decoder}
+					binding.Decoder = &dereferenceDecoder{field.Type.Elem(), binding.Decoder}
 					binding.Decoder = &structFieldDecoder{&field, binding.Decoder}
 					embeddedBindings = append(embeddedBindings, binding)
 				}
@@ -267,22 +282,15 @@ func describeStruct(cfg *frozenConfig, typ reflect.Type) (*StructDescriptor, err
 		fieldCacheKey := fmt.Sprintf("%s/%s", typ.String(), field.Name)
 		decoder := fieldDecoders[fieldCacheKey]
 		if decoder == nil {
-			var err error
-			decoder, err = decoderOfType(cfg, field.Type)
-			if err != nil {
-				return nil, err
-			}
+			decoder = decoderOfType(cfg, prefix+typ.String()+"."+field.Name+"->", field.Type)
 		}
 		encoder := fieldEncoders[fieldCacheKey]
 		if encoder == nil {
-			var err error
-			encoder, err = encoderOfType(cfg, field.Type)
-			if err != nil {
-				return nil, err
-			}
-			// map is stored as pointer in the struct
-			if field.Type.Kind() == reflect.Map {
-				encoder = &optionalEncoder{encoder}
+			encoder = encoderOfType(cfg, prefix+typ.String()+"."+field.Name+"->", field.Type)
+			// map is stored as pointer in the struct,
+			// and treat nil or empty map as empty field
+			if encoder != nil && field.Type.Kind() == reflect.Map {
+				encoder = &optionalMapEncoder{encoder}
 			}
 		}
 		binding := &Binding{
@@ -295,7 +303,7 @@ func describeStruct(cfg *frozenConfig, typ reflect.Type) (*StructDescriptor, err
 		binding.levels = []int{i}
 		bindings = append(bindings, binding)
 	}
-	return createStructDescriptor(cfg, typ, bindings, embeddedBindings), nil
+	return createStructDescriptor(cfg, typ, bindings, embeddedBindings)
 }
 func createStructDescriptor(cfg *frozenConfig, typ reflect.Type, bindings []*Binding, embeddedBindings []*Binding) *StructDescriptor {
 	onePtrEmbedded := false
@@ -323,6 +331,9 @@ func createStructDescriptor(cfg *frozenConfig, typ reflect.Type, bindings []*Bin
 	for _, extension := range extensions {
 		extension.UpdateStructDescriptor(structDescriptor)
 	}
+	for _, extension := range cfg.extensions {
+		extension.UpdateStructDescriptor(structDescriptor)
+	}
 	processTags(structDescriptor, cfg)
 	// merge normal & embedded bindings & sort with original order
 	allBindings := sortableBindings(append(embeddedBindings, structDescriptor.Fields...))

feature_reflect_map.go

@@ -9,6 +9,22 @@ import (
 	"unsafe"
 )
 
+func decoderOfMap(cfg *frozenConfig, prefix string, typ reflect.Type) ValDecoder {
+	decoder := decoderOfType(cfg, prefix+"[map]->", typ.Elem())
+	mapInterface := reflect.New(typ).Interface()
+	return &mapDecoder{typ, typ.Key(), typ.Elem(), decoder, extractInterface(mapInterface)}
+}
+
+func encoderOfMap(cfg *frozenConfig, prefix string, typ reflect.Type) ValEncoder {
+	elemType := typ.Elem()
+	encoder := encoderOfType(cfg, prefix+"[map]->", elemType)
+	mapInterface := reflect.New(typ).Elem().Interface()
+	if cfg.sortMapKeys {
+		return &sortKeysMapEncoder{typ, elemType, encoder, *((*emptyInterface)(unsafe.Pointer(&mapInterface)))}
+	}
+	return &mapEncoder{typ, elemType, encoder, *((*emptyInterface)(unsafe.Pointer(&mapInterface)))}
+}
+
 type mapDecoder struct {
 	mapType      reflect.Type
 	keyType      reflect.Type
@@ -32,7 +48,7 @@ func (decoder *mapDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
 	}
 	iter.ReadMapCB(func(iter *Iterator, keyStr string) bool {
 		elem := reflect.New(decoder.elemType)
-		decoder.elemDecoder.Decode(unsafe.Pointer(elem.Pointer()), iter)
+		decoder.elemDecoder.Decode(extractInterface(elem.Interface()).word, iter)
 		// to put into map, we have to use reflection
 		keyType := decoder.keyType
 		// TODO: remove this from loop

feature_reflect_native.go

@@ -32,12 +32,10 @@ type intCodec struct {
 }
 
 func (codec *intCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*int)(ptr)) = 0
-		return
-	}
+	if !iter.ReadNil() {
 		*((*int)(ptr)) = iter.ReadInt()
 	}
+}
 
 func (codec *intCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	stream.WriteInt(*((*int)(ptr)))
@@ -55,12 +53,10 @@ type uintptrCodec struct {
 }
 
 func (codec *uintptrCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*uintptr)(ptr)) = 0
-		return
-	}
+	if !iter.ReadNil() {
 		*((*uintptr)(ptr)) = uintptr(iter.ReadUint64())
 	}
+}
 
 func (codec *uintptrCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	stream.WriteUint64(uint64(*((*uintptr)(ptr))))
@@ -78,12 +74,10 @@ type int8Codec struct {
 }
 
 func (codec *int8Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*uint8)(ptr)) = 0
-		return
-	}
+	if !iter.ReadNil() {
 		*((*int8)(ptr)) = iter.ReadInt8()
 	}
+}
 
 func (codec *int8Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	stream.WriteInt8(*((*int8)(ptr)))
@@ -101,12 +95,10 @@ type int16Codec struct {
 }
 
 func (codec *int16Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*int16)(ptr)) = 0
-		return
-	}
+	if !iter.ReadNil() {
 		*((*int16)(ptr)) = iter.ReadInt16()
 	}
+}
 
 func (codec *int16Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	stream.WriteInt16(*((*int16)(ptr)))
@@ -124,12 +116,10 @@ type int32Codec struct {
 }
 
 func (codec *int32Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*int32)(ptr)) = 0
-		return
-	}
+	if !iter.ReadNil() {
 		*((*int32)(ptr)) = iter.ReadInt32()
 	}
+}
 
 func (codec *int32Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	stream.WriteInt32(*((*int32)(ptr)))
@@ -147,12 +137,10 @@ type int64Codec struct {
 }
 
 func (codec *int64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*int64)(ptr)) = 0
-		return
-	}
+	if !iter.ReadNil() {
 		*((*int64)(ptr)) = iter.ReadInt64()
 	}
+}
 
 func (codec *int64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	stream.WriteInt64(*((*int64)(ptr)))
@@ -170,11 +158,10 @@ type uintCodec struct {
 }
 
 func (codec *uintCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*uint)(ptr)) = 0
+	if !iter.ReadNil() {
+		*((*uint)(ptr)) = iter.ReadUint()
 		return
 	}
-	*((*uint)(ptr)) = iter.ReadUint()
 }
 
 func (codec *uintCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
@@ -193,12 +180,10 @@ type uint8Codec struct {
 }
 
 func (codec *uint8Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*uint8)(ptr)) = 0
-		return
-	}
+	if !iter.ReadNil() {
 		*((*uint8)(ptr)) = iter.ReadUint8()
 	}
+}
 
 func (codec *uint8Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	stream.WriteUint8(*((*uint8)(ptr)))
@@ -216,12 +201,10 @@ type uint16Codec struct {
 }
 
 func (codec *uint16Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*uint16)(ptr)) = 0
-		return
-	}
+	if !iter.ReadNil() {
 		*((*uint16)(ptr)) = iter.ReadUint16()
 	}
+}
 
 func (codec *uint16Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	stream.WriteUint16(*((*uint16)(ptr)))
@@ -239,12 +222,10 @@ type uint32Codec struct {
 }
 
 func (codec *uint32Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*uint32)(ptr)) = 0
-		return
-	}
+	if !iter.ReadNil() {
 		*((*uint32)(ptr)) = iter.ReadUint32()
 	}
+}
 
 func (codec *uint32Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	stream.WriteUint32(*((*uint32)(ptr)))
@@ -262,12 +243,10 @@ type uint64Codec struct {
 }
 
 func (codec *uint64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*uint64)(ptr)) = 0
-		return
-	}
+	if !iter.ReadNil() {
 		*((*uint64)(ptr)) = iter.ReadUint64()
 	}
+}
 
 func (codec *uint64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	stream.WriteUint64(*((*uint64)(ptr)))
@@ -285,12 +264,10 @@ type float32Codec struct {
 }
 
 func (codec *float32Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*float32)(ptr)) = 0
-		return
-	}
+	if !iter.ReadNil() {
 		*((*float32)(ptr)) = iter.ReadFloat32()
 	}
+}
 
 func (codec *float32Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	stream.WriteFloat32(*((*float32)(ptr)))
@@ -308,12 +285,10 @@ type float64Codec struct {
 }
 
 func (codec *float64Codec) Decode(ptr unsafe.Pointer, iter *Iterator) {
-	if iter.ReadNil() {
-		*((*float64)(ptr)) = 0
-		return
-	}
+	if !iter.ReadNil() {
 		*((*float64)(ptr)) = iter.ReadFloat64()
 	}
+}
 
 func (codec *float64Codec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	stream.WriteFloat64(*((*float64)(ptr)))
@@ -352,13 +327,39 @@ type emptyInterfaceCodec struct {
 }
 
 func (codec *emptyInterfaceCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	existing := *((*interface{})(ptr))
+
+	// Checking for both typed and untyped nil pointers.
+	if existing != nil &&
+		reflect.TypeOf(existing).Kind() == reflect.Ptr &&
+		!reflect.ValueOf(existing).IsNil() {
+
+		var ptrToExisting interface{}
+		for {
+			elem := reflect.ValueOf(existing).Elem()
+			if elem.Kind() != reflect.Ptr || elem.IsNil() {
+				break
+			}
+			ptrToExisting = existing
+			existing = elem.Interface()
+		}
+
 		if iter.ReadNil() {
+			if ptrToExisting != nil {
+				nilPtr := reflect.Zero(reflect.TypeOf(ptrToExisting).Elem())
+				reflect.ValueOf(ptrToExisting).Elem().Set(nilPtr)
+			} else {
 				*((*interface{})(ptr)) = nil
+			}
+		} else {
+			iter.ReadVal(existing)
+		}
+
 		return
 	}
-	existing := *((*interface{})(ptr))
-	if existing != nil && reflect.TypeOf(existing).Kind() == reflect.Ptr {
-		iter.ReadVal(existing)
+
+	if iter.ReadNil() {
+		*((*interface{})(ptr)) = nil
 	} else {
 		*((*interface{})(ptr)) = iter.Read()
 	}
@@ -381,6 +382,11 @@ type nonEmptyInterfaceCodec struct {
 }
 
 func (codec *nonEmptyInterfaceCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if iter.WhatIsNext() == NilValue {
+		iter.skipFourBytes('n', 'u', 'l', 'l')
+		*((*interface{})(ptr)) = nil
+		return
+	}
 	nonEmptyInterface := (*nonEmptyInterface)(ptr)
 	if nonEmptyInterface.itab == nil {
 		iter.ReportError("read non-empty interface", "do not know which concrete type to decode to")
@@ -391,15 +397,20 @@ func (codec *nonEmptyInterfaceCodec) Decode(ptr unsafe.Pointer, iter *Iterator)
 	e.typ = nonEmptyInterface.itab.typ
 	e.word = nonEmptyInterface.word
 	iter.ReadVal(&i)
+	if e.word == nil {
+		nonEmptyInterface.itab = nil
+	}
 	nonEmptyInterface.word = e.word
 }
 
 func (codec *nonEmptyInterfaceCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	nonEmptyInterface := (*nonEmptyInterface)(ptr)
 	var i interface{}
+	if nonEmptyInterface.itab != nil {
 		e := (*emptyInterface)(unsafe.Pointer(&i))
 		e.typ = nonEmptyInterface.itab.typ
 		e.word = nonEmptyInterface.word
+	}
 	stream.WriteVal(i)
 }
 
@@ -435,15 +446,33 @@ type jsonNumberCodec struct {
 }
 
 func (codec *jsonNumberCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	switch iter.WhatIsNext() {
+	case StringValue:
+		*((*json.Number)(ptr)) = json.Number(iter.ReadString())
+	case NilValue:
+		iter.skipFourBytes('n', 'u', 'l', 'l')
+		*((*json.Number)(ptr)) = ""
+	default:
 		*((*json.Number)(ptr)) = json.Number([]byte(iter.readNumberAsString()))
 	}
+}
 
 func (codec *jsonNumberCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteRaw(string(*((*json.Number)(ptr))))
+	number := *((*json.Number)(ptr))
+	if len(number) == 0 {
+		stream.WriteRaw("0")
+	} else {
+		stream.WriteRaw(string(number))
+	}
 }
 
 func (codec *jsonNumberCodec) EncodeInterface(val interface{}, stream *Stream) {
-	stream.WriteRaw(string(val.(json.Number)))
+	number := val.(json.Number)
+	if len(number) == 0 {
+		stream.WriteRaw("0")
+	} else {
+		stream.WriteRaw(string(number))
+	}
 }
 
 func (codec *jsonNumberCodec) IsEmpty(ptr unsafe.Pointer) bool {
@@ -454,15 +483,33 @@ type jsoniterNumberCodec struct {
 }
 
 func (codec *jsoniterNumberCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	switch iter.WhatIsNext() {
+	case StringValue:
+		*((*Number)(ptr)) = Number(iter.ReadString())
+	case NilValue:
+		iter.skipFourBytes('n', 'u', 'l', 'l')
+		*((*Number)(ptr)) = ""
+	default:
 		*((*Number)(ptr)) = Number([]byte(iter.readNumberAsString()))
 	}
+}
 
 func (codec *jsoniterNumberCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
-	stream.WriteRaw(string(*((*Number)(ptr))))
+	number := *((*Number)(ptr))
+	if len(number) == 0 {
+		stream.WriteRaw("0")
+	} else {
+		stream.WriteRaw(string(number))
+	}
 }
 
 func (codec *jsoniterNumberCodec) EncodeInterface(val interface{}, stream *Stream) {
-	stream.WriteRaw(string(val.(Number)))
+	number := val.(Number)
+	if len(number) == 0 {
+		stream.WriteRaw("0")
+	} else {
+		stream.WriteRaw(string(number))
+	}
 }
 
 func (codec *jsoniterNumberCodec) IsEmpty(ptr unsafe.Pointer) bool {
@@ -586,7 +633,7 @@ type stringModeNumberDecoder struct {
 func (decoder *stringModeNumberDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
 	c := iter.nextToken()
 	if c != '"' {
-		iter.ReportError("stringModeNumberDecoder", `expect "`)
+		iter.ReportError("stringModeNumberDecoder", `expect ", but found `+string([]byte{c}))
 		return
 	}
 	decoder.elemDecoder.Decode(ptr, iter)
@@ -595,7 +642,7 @@ func (decoder *stringModeNumberDecoder) Decode(ptr unsafe.Pointer, iter *Iterato
 	}
 	c = iter.readByte()
 	if c != '"' {
-		iter.ReportError("stringModeNumberDecoder", `expect "`)
+		iter.ReportError("stringModeNumberDecoder", `expect ", but found `+string([]byte{c}))
 		return
 	}
 }
@@ -660,7 +707,11 @@ func (encoder *marshalerEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
 	templateInterface := encoder.templateInterface
 	templateInterface.word = ptr
 	realInterface := (*interface{})(unsafe.Pointer(&templateInterface))
-	marshaler := (*realInterface).(json.Marshaler)
+	marshaler, ok := (*realInterface).(json.Marshaler)
+	if !ok {
+		stream.WriteVal(nil)
+		return
+	}
 
 	bytes, err := marshaler.MarshalJSON()
 	if err != nil {

feature_reflect_object.go

@@ -8,17 +8,14 @@ import (
 	"unsafe"
 )
 
-func encoderOfStruct(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
+func encoderOfStruct(cfg *frozenConfig, prefix string, typ reflect.Type) ValEncoder {
 	type bindingTo struct {
 		binding *Binding
 		toName  string
 		ignored bool
 	}
 	orderedBindings := []*bindingTo{}
-	structDescriptor, err := describeStruct(cfg, typ)
-	if err != nil {
-		return nil, err
-	}
+	structDescriptor := describeStruct(cfg, prefix, typ)
 	for _, binding := range structDescriptor.Fields {
 		for _, toName := range binding.ToNames {
 			new := &bindingTo{
@@ -35,7 +32,7 @@ func encoderOfStruct(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
 		}
 	}
 	if len(orderedBindings) == 0 {
-		return &emptyStructEncoder{}, nil
+		return &emptyStructEncoder{}
 	}
 	finalOrderedFields := []structFieldTo{}
 	for _, bindingTo := range orderedBindings {
@@ -46,7 +43,8 @@ func encoderOfStruct(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
 			})
 		}
 	}
-	return &structEncoder{structDescriptor.onePtrEmbedded, structDescriptor.onePtrOptimization, finalOrderedFields}, nil
+	return &structEncoder{typ, structDescriptor.onePtrEmbedded,
+		structDescriptor.onePtrOptimization, finalOrderedFields}
 }
 
 func resolveConflictBinding(cfg *frozenConfig, old, new *Binding) (ignoreOld, ignoreNew bool) {
@@ -78,12 +76,9 @@ func resolveConflictBinding(cfg *frozenConfig, old, new *Binding) (ignoreOld, ig
 	}
 }
 
-func decoderOfStruct(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
+func decoderOfStruct(cfg *frozenConfig, prefix string, typ reflect.Type) ValDecoder {
 	bindings := map[string]*Binding{}
-	structDescriptor, err := describeStruct(cfg, typ)
-	if err != nil {
-		return nil, err
-	}
+	structDescriptor := describeStruct(cfg, prefix, typ)
 	for _, binding := range structDescriptor.Fields {
 		for _, fromName := range binding.FromNames {
 			old := bindings[fromName]
@@ -131,6 +126,7 @@ func (encoder *structFieldEncoder) IsEmpty(ptr unsafe.Pointer) bool {
 }
 
 type structEncoder struct {
+	typ                reflect.Type
 	onePtrEmbedded     bool
 	onePtrOptimization bool
 	fields             []structFieldTo
@@ -156,6 +152,9 @@ func (encoder *structEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
 		isNotFirst = true
 	}
 	stream.WriteObjectEnd()
+	if stream.Error != nil && stream.Error != io.EOF {
+		stream.Error = fmt.Errorf("%v.%s", encoder.typ, stream.Error.Error())
+	}
 }
 
 func (encoder *structEncoder) EncodeInterface(val interface{}, stream *Stream) {

feature_reflect_optional.go

@@ -0,0 +1,124 @@
+package jsoniter
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+func decoderOfOptional(cfg *frozenConfig, prefix string, typ reflect.Type) ValDecoder {
+	elemType := typ.Elem()
+	decoder := decoderOfType(cfg, prefix, elemType)
+	return &OptionalDecoder{elemType, decoder}
+}
+
+func encoderOfOptional(cfg *frozenConfig, prefix string, typ reflect.Type) ValEncoder {
+	elemType := typ.Elem()
+	elemEncoder := encoderOfType(cfg, prefix, elemType)
+	encoder := &OptionalEncoder{elemEncoder}
+	if elemType.Kind() == reflect.Map {
+		encoder = &OptionalEncoder{encoder}
+	}
+	return encoder
+}
+
+type OptionalDecoder struct {
+	ValueType    reflect.Type
+	ValueDecoder ValDecoder
+}
+
+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)
+			newPtr := extractInterface(value.Interface()).word
+			decoder.ValueDecoder.Decode(newPtr, iter)
+			*((*uintptr)(ptr)) = uintptr(newPtr)
+		} else {
+			//reuse existing instance
+			decoder.ValueDecoder.Decode(*((*unsafe.Pointer)(ptr)), iter)
+		}
+	}
+}
+
+type dereferenceDecoder struct {
+	// only to deference a pointer
+	valueType    reflect.Type
+	valueDecoder ValDecoder
+}
+
+func (decoder *dereferenceDecoder) Decode(ptr unsafe.Pointer, iter *Iterator) {
+	if *((*unsafe.Pointer)(ptr)) == nil {
+		//pointer to null, we have to allocate memory to hold the value
+		value := reflect.New(decoder.valueType)
+		newPtr := extractInterface(value.Interface()).word
+		decoder.valueDecoder.Decode(newPtr, iter)
+		*((*uintptr)(ptr)) = uintptr(newPtr)
+	} else {
+		//reuse existing instance
+		decoder.valueDecoder.Decode(*((*unsafe.Pointer)(ptr)), iter)
+	}
+}
+
+type OptionalEncoder struct {
+	ValueEncoder ValEncoder
+}
+
+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 {
+	return *((*unsafe.Pointer)(ptr)) == nil
+}
+
+type dereferenceEncoder struct {
+	ValueEncoder ValEncoder
+}
+
+func (encoder *dereferenceEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	if *((*unsafe.Pointer)(ptr)) == nil {
+		stream.WriteNil()
+	} else {
+		encoder.ValueEncoder.Encode(*((*unsafe.Pointer)(ptr)), stream)
+	}
+}
+
+func (encoder *dereferenceEncoder) EncodeInterface(val interface{}, stream *Stream) {
+	WriteToStream(val, stream, encoder)
+}
+
+func (encoder *dereferenceEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	return encoder.ValueEncoder.IsEmpty(*((*unsafe.Pointer)(ptr)))
+}
+
+type optionalMapEncoder struct {
+	valueEncoder ValEncoder
+}
+
+func (encoder *optionalMapEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
+	if *((*unsafe.Pointer)(ptr)) == nil {
+		stream.WriteNil()
+	} else {
+		encoder.valueEncoder.Encode(*((*unsafe.Pointer)(ptr)), stream)
+	}
+}
+
+func (encoder *optionalMapEncoder) EncodeInterface(val interface{}, stream *Stream) {
+	WriteToStream(val, stream, encoder)
+}
+
+func (encoder *optionalMapEncoder) IsEmpty(ptr unsafe.Pointer) bool {
+	p := *((*unsafe.Pointer)(ptr))
+	return p == nil || encoder.valueEncoder.IsEmpty(p)
+}

feature_reflect_slice.go

@@ -7,23 +7,17 @@ import (
 	"unsafe"
 )
 
-func decoderOfSlice(cfg *frozenConfig, typ reflect.Type) (ValDecoder, error) {
-	decoder, err := decoderOfType(cfg, typ.Elem())
-	if err != nil {
-		return nil, err
-	}
-	return &sliceDecoder{typ, typ.Elem(), decoder}, nil
+func decoderOfSlice(cfg *frozenConfig, prefix string, typ reflect.Type) ValDecoder {
+	decoder := decoderOfType(cfg, prefix+"[slice]->", typ.Elem())
+	return &sliceDecoder{typ, typ.Elem(), decoder}
 }
 
-func encoderOfSlice(cfg *frozenConfig, typ reflect.Type) (ValEncoder, error) {
-	encoder, err := encoderOfType(cfg, typ.Elem())
-	if err != nil {
-		return nil, err
-	}
+func encoderOfSlice(cfg *frozenConfig, prefix string, typ reflect.Type) ValEncoder {
+	encoder := encoderOfType(cfg, prefix+"[slice]->", typ.Elem())
 	if typ.Elem().Kind() == reflect.Map {
-		encoder = &optionalEncoder{encoder}
+		encoder = &OptionalEncoder{encoder}
 	}
-	return &sliceEncoder{typ, typ.Elem(), encoder}, nil
+	return &sliceEncoder{typ, typ.Elem(), encoder}
 }
 
 type sliceEncoder struct {
@@ -124,15 +118,14 @@ func growOne(slice *sliceHeader, sliceType reflect.Type, elementType reflect.Typ
 			}
 		}
 	}
-	newVal := reflect.MakeSlice(sliceType, newLen, newCap)
-	dst := unsafe.Pointer(newVal.Pointer())
+	newVal := reflect.MakeSlice(sliceType, newLen, newCap).Interface()
+	newValPtr := extractInterface(newVal).word
+	dst := (*sliceHeader)(newValPtr).Data
 	// 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]
-	}
+	originalBytesCount := slice.Len * int(elementType.Size())
+	srcSliceHeader := (unsafe.Pointer)(&sliceHeader{slice.Data, originalBytesCount, originalBytesCount})
+	dstSliceHeader := (unsafe.Pointer)(&sliceHeader{dst, originalBytesCount, originalBytesCount})
+	copy(*(*[]byte)(dstSliceHeader), *(*[]byte)(srcSliceHeader))
 	slice.Data = dst
 	slice.Len = newLen
 	slice.Cap = newCap
@@ -142,8 +135,9 @@ func reuseSlice(slice *sliceHeader, sliceType reflect.Type, expectedCap int) {
 	if expectedCap <= slice.Cap {
 		return
 	}
-	newVal := reflect.MakeSlice(sliceType, 0, expectedCap)
-	dst := unsafe.Pointer(newVal.Pointer())
+	newVal := reflect.MakeSlice(sliceType, 0, expectedCap).Interface()
+	newValPtr := extractInterface(newVal).word
+	dst := (*sliceHeader)(newValPtr).Data
 	slice.Data = dst
 	slice.Cap = expectedCap
 }

feature_reflect_struct_decoder.go

@@ -8,22 +8,22 @@ import (
 	"unsafe"
 )
 
-func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder) (ValDecoder, error) {
+func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder) ValDecoder {
 	knownHash := map[int32]struct{}{
 		0: {},
 	}
 	switch len(fields) {
 	case 0:
-		return &skipObjectDecoder{typ}, nil
+		return &skipObjectDecoder{typ}
 	case 1:
 		for fieldName, fieldDecoder := range fields {
 			fieldHash := calcHash(fieldName)
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields}
 			}
 			knownHash[fieldHash] = struct{}{}
-			return &oneFieldStructDecoder{typ, fieldHash, fieldDecoder}, nil
+			return &oneFieldStructDecoder{typ, fieldHash, fieldDecoder}
 		}
 	case 2:
 		var fieldHash1 int32
@@ -34,7 +34,7 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			fieldHash := calcHash(fieldName)
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldHash1 == 0 {
@@ -45,7 +45,7 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 				fieldDecoder2 = fieldDecoder
 			}
 		}
-		return &twoFieldsStructDecoder{typ, fieldHash1, fieldDecoder1, fieldHash2, fieldDecoder2}, nil
+		return &twoFieldsStructDecoder{typ, fieldHash1, fieldDecoder1, fieldHash2, fieldDecoder2}
 	case 3:
 		var fieldName1 int32
 		var fieldName2 int32
@@ -57,7 +57,7 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			fieldHash := calcHash(fieldName)
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -72,7 +72,9 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &threeFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3}
 	case 4:
 		var fieldName1 int32
 		var fieldName2 int32
@@ -86,7 +88,7 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			fieldHash := calcHash(fieldName)
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -104,8 +106,10 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &fourFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3,
-			fieldName4, fieldDecoder4}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3,
+			fieldName4, fieldDecoder4}
 	case 5:
 		var fieldName1 int32
 		var fieldName2 int32
@@ -121,7 +125,7 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			fieldHash := calcHash(fieldName)
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -142,8 +146,11 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &fiveFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3,
-			fieldName4, fieldDecoder4, fieldName5, fieldDecoder5}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3,
+			fieldName4, fieldDecoder4,
+			fieldName5, fieldDecoder5}
 	case 6:
 		var fieldName1 int32
 		var fieldName2 int32
@@ -161,7 +168,7 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			fieldHash := calcHash(fieldName)
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -185,8 +192,12 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &sixFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3,
-			fieldName4, fieldDecoder4, fieldName5, fieldDecoder5, fieldName6, fieldDecoder6}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3,
+			fieldName4, fieldDecoder4,
+			fieldName5, fieldDecoder5,
+			fieldName6, fieldDecoder6}
 	case 7:
 		var fieldName1 int32
 		var fieldName2 int32
@@ -206,7 +217,7 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			fieldHash := calcHash(fieldName)
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -233,9 +244,13 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &sevenFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3,
-			fieldName4, fieldDecoder4, fieldName5, fieldDecoder5, fieldName6, fieldDecoder6,
-			fieldName7, fieldDecoder7}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3,
+			fieldName4, fieldDecoder4,
+			fieldName5, fieldDecoder5,
+			fieldName6, fieldDecoder6,
+			fieldName7, fieldDecoder7}
 	case 8:
 		var fieldName1 int32
 		var fieldName2 int32
@@ -257,7 +272,7 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			fieldHash := calcHash(fieldName)
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -287,9 +302,14 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &eightFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3,
-			fieldName4, fieldDecoder4, fieldName5, fieldDecoder5, fieldName6, fieldDecoder6,
-			fieldName7, fieldDecoder7, fieldName8, fieldDecoder8}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3,
+			fieldName4, fieldDecoder4,
+			fieldName5, fieldDecoder5,
+			fieldName6, fieldDecoder6,
+			fieldName7, fieldDecoder7,
+			fieldName8, fieldDecoder8}
 	case 9:
 		var fieldName1 int32
 		var fieldName2 int32
@@ -313,7 +333,7 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			fieldHash := calcHash(fieldName)
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -346,9 +366,15 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &nineFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3,
-			fieldName4, fieldDecoder4, fieldName5, fieldDecoder5, fieldName6, fieldDecoder6,
-			fieldName7, fieldDecoder7, fieldName8, fieldDecoder8, fieldName9, fieldDecoder9}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3,
+			fieldName4, fieldDecoder4,
+			fieldName5, fieldDecoder5,
+			fieldName6, fieldDecoder6,
+			fieldName7, fieldDecoder7,
+			fieldName8, fieldDecoder8,
+			fieldName9, fieldDecoder9}
 	case 10:
 		var fieldName1 int32
 		var fieldName2 int32
@@ -374,7 +400,7 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			fieldHash := calcHash(fieldName)
 			_, known := knownHash[fieldHash]
 			if known {
-				return &generalStructDecoder{typ, fields}, nil
+				return &generalStructDecoder{typ, fields}
 			}
 			knownHash[fieldHash] = struct{}{}
 			if fieldName1 == 0 {
@@ -410,12 +436,18 @@ func createStructDecoder(typ reflect.Type, fields map[string]*structFieldDecoder
 			}
 		}
 		return &tenFieldsStructDecoder{typ,
-			fieldName1, fieldDecoder1, fieldName2, fieldDecoder2, fieldName3, fieldDecoder3,
-			fieldName4, fieldDecoder4, fieldName5, fieldDecoder5, fieldName6, fieldDecoder6,
-			fieldName7, fieldDecoder7, fieldName8, fieldDecoder8, fieldName9, fieldDecoder9,
-			fieldName10, fieldDecoder10}, nil
+			fieldName1, fieldDecoder1,
+			fieldName2, fieldDecoder2,
+			fieldName3, fieldDecoder3,
+			fieldName4, fieldDecoder4,
+			fieldName5, fieldDecoder5,
+			fieldName6, fieldDecoder6,
+			fieldName7, fieldDecoder7,
+			fieldName8, fieldDecoder8,
+			fieldName9, fieldDecoder9,
+			fieldName10, fieldDecoder10}
 	}
-	return &generalStructDecoder{typ, fields}, nil
+	return &generalStructDecoder{typ, fields}
 }
 
 type generalStructDecoder struct {
@@ -427,8 +459,18 @@ func (decoder *generalStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterator)
 	if !iter.readObjectStart() {
 		return
 	}
-	fieldBytes := iter.readObjectFieldAsBytes()
-	field := *(*string)(unsafe.Pointer(&fieldBytes))
+	var fieldBytes []byte
+	var field string
+	if iter.cfg.objectFieldMustBeSimpleString {
+		fieldBytes = iter.readObjectFieldAsBytes()
+		field = *(*string)(unsafe.Pointer(&fieldBytes))
+	} else {
+		field = iter.ReadString()
+		c := iter.nextToken()
+		if c != ':' {
+			iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+		}
+	}
 	fieldDecoder := decoder.fields[strings.ToLower(field)]
 	if fieldDecoder == nil {
 		iter.Skip()
@@ -436,8 +478,16 @@ func (decoder *generalStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterator)
 		fieldDecoder.Decode(ptr, iter)
 	}
 	for iter.nextToken() == ',' {
-		fieldBytes = iter.readObjectFieldAsBytes()
+		if iter.cfg.objectFieldMustBeSimpleString {
+			fieldBytes := iter.readObjectFieldAsBytes()
 			field = *(*string)(unsafe.Pointer(&fieldBytes))
+		} else {
+			field = iter.ReadString()
+			c := iter.nextToken()
+			if c != ':' {
+				iter.ReportError("ReadObject", "expect : after object field, but found "+string([]byte{c}))
+			}
+		}
 		fieldDecoder = decoder.fields[strings.ToLower(field)]
 		if fieldDecoder == nil {
 			iter.Skip()
@@ -446,7 +496,7 @@ func (decoder *generalStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterator)
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
@@ -484,7 +534,7 @@ func (decoder *oneFieldStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterator)
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
@@ -514,7 +564,7 @@ func (decoder *twoFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterator
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
@@ -548,7 +598,7 @@ func (decoder *threeFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterat
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
@@ -586,7 +636,7 @@ func (decoder *fourFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterato
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
@@ -628,7 +678,7 @@ func (decoder *fiveFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterato
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
@@ -674,7 +724,7 @@ func (decoder *sixFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterator
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
@@ -724,7 +774,7 @@ func (decoder *sevenFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterat
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
@@ -778,7 +828,7 @@ func (decoder *eightFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterat
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
@@ -836,7 +886,7 @@ func (decoder *nineFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterato
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 
@@ -898,7 +948,7 @@ func (decoder *tenFieldsStructDecoder) Decode(ptr unsafe.Pointer, iter *Iterator
 		}
 	}
 	if iter.Error != nil && iter.Error != io.EOF {
-		iter.Error = fmt.Errorf("%v: %s", decoder.typ, iter.Error.Error())
+		iter.Error = fmt.Errorf("%v.%s", decoder.typ, iter.Error.Error())
 	}
 }
 

feature_stream.go

@@ -4,7 +4,7 @@ import (
 	"io"
 )
 
-// Stream is a io.Writer like object, with JSON specific write functions.
+// stream is a io.Writer like object, with JSON specific write functions.
 // Error is not returned as return value, but stored as Error member on this stream instance.
 type Stream struct {
 	cfg        *frozenConfig
@@ -13,6 +13,7 @@ type Stream struct {
 	n          int
 	Error      error
 	indention  int
+	Attachment interface{} // open for customized encoder
 }
 
 // NewStream create new stream instance.
@@ -191,6 +192,9 @@ func (stream *Stream) ensure(minimal int) {
 func (stream *Stream) growAtLeast(minimal int) {
 	if stream.out != nil {
 		stream.Flush()
+		if stream.Available() >= minimal {
+			return
+		}
 	}
 	toGrow := len(stream.buf)
 	if toGrow < minimal {
@@ -280,8 +284,7 @@ func (stream *Stream) WriteArrayStart() {
 
 // WriteEmptyArray write []
 func (stream *Stream) WriteEmptyArray() {
-	stream.writeByte('[')
-	stream.writeByte(']')
+	stream.writeTwoBytes('[', ']')
 }
 
 // WriteArrayEnd write ] with possible indention

jsoniter_1dot8_only_test.go

@@ -22,7 +22,7 @@ func Test_new_encoder(t *testing.T) {
 	encoder2 := NewEncoder(buf2)
 	encoder2.SetEscapeHTML(false)
 	encoder2.Encode([]int{1})
-	should.Equal("[1]", buf2.String())
+	should.Equal("[1]\n", buf2.String())
 }
 
 func Test_string_encode_with_std_without_html_escape(t *testing.T) {

jsoniter_any_string_test.go

@@ -51,6 +51,7 @@ func Test_read_string_as_any(t *testing.T) {
 
 func Test_wrap_string(t *testing.T) {
 	should := require.New(t)
-	any := WrapString("123")
-	should.Equal(123, any.ToInt())
+	any := Get([]byte("-32000")).MustBeValid()
+	should.Equal(-32000, any.ToInt())
+	should.NoError(any.LastError())
 }

jsoniter_bool_test.go

@@ -92,22 +92,22 @@ func Test_bool_can_be_null(t *testing.T) {
 	obj := TestData{}
 	data1 := []byte(`{"field": true}`)
 	err := Unmarshal(data1, &obj)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(true, obj.Field)
 
 	data2 := []byte(`{"field": null}`)
 	err = Unmarshal(data2, &obj)
-	should.Equal(nil, err)
+	should.NoError(err)
 	// Same behavior as stdlib, not touching the existing value.
 	should.Equal(true, obj.Field)
 
 	// Checking stdlib behavior as well
 	obj2 := TestData{}
 	err = json.Unmarshal(data1, &obj2)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(true, obj2.Field)
 
 	err = json.Unmarshal(data2, &obj2)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(true, obj2.Field)
 }

jsoniter_customize_test.go

@@ -2,11 +2,12 @@ package jsoniter
 
 import (
 	"encoding/json"
-	"github.com/stretchr/testify/require"
 	"strconv"
 	"testing"
 	"time"
 	"unsafe"
+
+	"github.com/stretchr/testify/require"
 )
 
 func Test_customize_type_decoder(t *testing.T) {
@@ -82,7 +83,7 @@ func Test_customize_field_decoder(t *testing.T) {
 }
 
 type TestObject1 struct {
-	field1 string
+	Field1 string
 }
 
 type testExtension struct {
@@ -93,7 +94,7 @@ func (extension *testExtension) UpdateStructDescriptor(structDescriptor *StructD
 	if structDescriptor.Type.String() != "jsoniter.TestObject1" {
 		return
 	}
-	binding := structDescriptor.GetField("field1")
+	binding := structDescriptor.GetField("Field1")
 	binding.Encoder = &funcEncoder{fun: func(ptr unsafe.Pointer, stream *Stream) {
 		str := *((*string)(ptr))
 		val, _ := strconv.Atoi(str)
@@ -108,12 +109,13 @@ func (extension *testExtension) UpdateStructDescriptor(structDescriptor *StructD
 
 func Test_customize_field_by_extension(t *testing.T) {
 	should := require.New(t)
-	RegisterExtension(&testExtension{})
+	cfg := Config{}.Froze()
+	cfg.RegisterExtension(&testExtension{})
 	obj := TestObject1{}
-	err := UnmarshalFromString(`{"field-1": 100}`, &obj)
+	err := cfg.UnmarshalFromString(`{"field-1": 100}`, &obj)
 	should.Nil(err)
-	should.Equal("100", obj.field1)
-	str, err := MarshalToString(obj)
+	should.Equal("100", obj.Field1)
+	str, err := cfg.MarshalToString(obj)
 	should.Nil(err)
 	should.Equal(`{"field-1":100}`, str)
 }

jsoniter_enum_marshaler_test.go

@@ -40,11 +40,11 @@ func Test_custom_marshaler_on_enum(t *testing.T) {
 	w := Wrapper{Payload: MyEnumB}
 
 	jb, err := Marshal(w)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(`{"Payload":"foo-1"}`, string(jb))
 
 	var w2 Wrapper2
 	err = Unmarshal(jb, &w2)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(MyEnumB, w2.Payload)
 }

jsoniter_fixed_array_test.go

@@ -15,6 +15,15 @@ func Test_encode_fixed_array(t *testing.T) {
 	should.Equal("[0.1,1]", output)
 }
 
+func Test_encode_fixed_array_empty(t *testing.T) {
+	should := require.New(t)
+	type FixedArray [0]float64
+	fixed := FixedArray{}
+	output, err := MarshalToString(fixed)
+	should.Nil(err)
+	should.Equal("[]", output)
+}
+
 func Test_encode_fixed_array_of_map(t *testing.T) {
 	should := require.New(t)
 	type FixedArray [2]map[string]string

jsoniter_float_test.go

@@ -192,6 +192,13 @@ func Test_lossy_float_marshal(t *testing.T) {
 	should.Equal("0.123457", output)
 }
 
+func Test_read_number(t *testing.T) {
+	should := require.New(t)
+	iter := ParseString(ConfigDefault, `92233720368547758079223372036854775807`)
+	val := iter.ReadNumber()
+	should.Equal(`92233720368547758079223372036854775807`, string(val))
+}
+
 func Benchmark_jsoniter_float(b *testing.B) {
 	b.ReportAllocs()
 	input := []byte(`1.1123,`)

jsoniter_int_test.go

@@ -506,6 +506,42 @@ func Test_jsoniter_number(t *testing.T) {
 	should.Equal("1", str)
 }
 
+func Test_non_numeric_as_number(t *testing.T) {
+	should := require.New(t)
+	var v1 json.Number
+	err := Unmarshal([]byte(`"500"`), &v1)
+	should.Nil(err)
+	should.Equal("500", string(v1))
+	var v2 Number
+	err = Unmarshal([]byte(`"500"`), &v2)
+	should.Nil(err)
+	should.Equal("500", string(v2))
+}
+
+func Test_null_as_number(t *testing.T) {
+	should := require.New(t)
+	var v1 json.Number
+	err := json.Unmarshal([]byte(`null`), &v1)
+	should.Nil(err)
+	should.Equal("", string(v1))
+	output, err := json.Marshal(v1)
+	should.NoError(err)
+	should.Equal("0", string(output))
+	var v2 Number
+	err = Unmarshal([]byte(`null`), &v2)
+	should.Nil(err)
+	should.Equal("", string(v2))
+	output, err = Marshal(v2)
+	should.NoError(err)
+	should.Equal("0", string(output))
+}
+
+func Test_float_as_int(t *testing.T) {
+	should := require.New(t)
+	var i int
+	should.NotNil(Unmarshal([]byte(`1.1`), &i))
+}
+
 func Benchmark_jsoniter_encode_int(b *testing.B) {
 	stream := NewStream(ConfigDefault, ioutil.Discard, 64)
 	for n := 0; n < b.N; n++ {

jsoniter_interface_test.go

@@ -7,8 +7,24 @@ import (
 	"unsafe"
 
 	"github.com/stretchr/testify/require"
+	"reflect"
 )
 
+func Test_write_empty_interface_via_placeholder(t *testing.T) {
+	fmt.Println(^uint(0) >> 1)
+	should := require.New(t)
+	m := map[uint32]interface{}{1: "hello"}
+	inf := reflect.ValueOf(m).MapIndex(reflect.ValueOf(uint32(1))).Interface()
+	encoder := &placeholderEncoder{
+		cfg:      ConfigFastest.(*frozenConfig),
+		cacheKey: reflect.TypeOf(m).Elem(),
+	}
+	stream := ConfigFastest.BorrowStream(nil)
+	encoderOfType(ConfigFastest.(*frozenConfig), "", reflect.TypeOf(m).Elem())
+	encoder.EncodeInterface(inf, stream)
+	should.Equal(`"hello"`, string(stream.Buffer()))
+}
+
 func Test_write_array_of_interface(t *testing.T) {
 	should := require.New(t)
 	array := []interface{}{"hello"}
@@ -329,13 +345,13 @@ func Test_nil_out_null_interface(t *testing.T) {
 	data1 := []byte(`{"field": true}`)
 
 	err := Unmarshal(data1, &obj)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(true, *(obj.Field.(*bool)))
 
 	data2 := []byte(`{"field": null}`)
 
 	err = Unmarshal(data2, &obj)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(nil, obj.Field)
 
 	// Checking stdlib behavior matches.
@@ -344,11 +360,11 @@ func Test_nil_out_null_interface(t *testing.T) {
 	}
 
 	err = json.Unmarshal(data1, &obj2)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(true, *(obj2.Field.(*bool)))
 
 	err = json.Unmarshal(data2, &obj2)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(nil, obj2.Field)
 }
 
@@ -363,10 +379,198 @@ func Test_omitempty_nil_interface(t *testing.T) {
 	}
 
 	js, err := json.Marshal(obj)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal("{}", string(js))
 
 	str, err := MarshalToString(obj)
-	should.Equal(nil, err)
+	should.NoError(err)
 	should.Equal(string(js), str)
 }
+
+func Test_omitempty_nil_nonempty_interface(t *testing.T) {
+	type TestData struct {
+		Field MyInterface `json:"field,omitempty"`
+	}
+	should := require.New(t)
+
+	obj := TestData{
+		Field: nil,
+	}
+
+	js, err := json.Marshal(obj)
+	should.NoError(err)
+	should.Equal("{}", string(js))
+
+	str, err := MarshalToString(obj)
+	should.NoError(err)
+	should.Equal(string(js), str)
+
+	obj.Field = MyString("hello")
+	err = UnmarshalFromString(`{"field":null}`, &obj)
+	should.NoError(err)
+	should.Nil(obj.Field)
+}
+
+func Test_marshal_nil_marshaler_interface(t *testing.T) {
+	type TestData struct {
+		Field json.Marshaler `json:"field"`
+	}
+	should := require.New(t)
+
+	obj := TestData{
+		Field: nil,
+	}
+
+	js, err := json.Marshal(obj)
+	should.NoError(err)
+	should.Equal(`{"field":null}`, string(js))
+
+	str, err := MarshalToString(obj)
+	should.NoError(err)
+	should.Equal(string(js), str)
+}
+
+func Test_marshal_nil_nonempty_interface(t *testing.T) {
+	type TestData struct {
+		Field MyInterface `json:"field"`
+	}
+	should := require.New(t)
+
+	obj := TestData{
+		Field: nil,
+	}
+
+	js, err := json.Marshal(obj)
+	should.NoError(err)
+	should.Equal(`{"field":null}`, string(js))
+
+	str, err := MarshalToString(obj)
+	should.NoError(err)
+	should.Equal(string(js), str)
+
+	obj.Field = MyString("hello")
+	err = Unmarshal(js, &obj)
+	should.NoError(err)
+	should.Equal(nil, obj.Field)
+}
+
+func Test_overwrite_interface_ptr_value_with_nil(t *testing.T) {
+	type Wrapper struct {
+		Payload interface{} `json:"payload,omitempty"`
+	}
+	type Payload struct {
+		Value int `json:"val,omitempty"`
+	}
+
+	should := require.New(t)
+
+	payload := &Payload{}
+	wrapper := &Wrapper{
+		Payload: &payload,
+	}
+
+	err := json.Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(&payload, wrapper.Payload)
+	should.Equal(42, (*(wrapper.Payload.(**Payload))).Value)
+
+	err = json.Unmarshal([]byte(`{"payload": null}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(&payload, wrapper.Payload)
+	should.Equal((*Payload)(nil), payload)
+
+	payload = &Payload{}
+	wrapper = &Wrapper{
+		Payload: &payload,
+	}
+
+	err = Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(&payload, wrapper.Payload)
+	should.Equal(42, (*(wrapper.Payload.(**Payload))).Value)
+
+	err = Unmarshal([]byte(`{"payload": null}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(&payload, wrapper.Payload)
+	should.Equal((*Payload)(nil), payload)
+}
+
+func Test_overwrite_interface_value_with_nil(t *testing.T) {
+	type Wrapper struct {
+		Payload interface{} `json:"payload,omitempty"`
+	}
+	type Payload struct {
+		Value int `json:"val,omitempty"`
+	}
+
+	should := require.New(t)
+
+	payload := &Payload{}
+	wrapper := &Wrapper{
+		Payload: payload,
+	}
+
+	err := json.Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(42, (*(wrapper.Payload.(*Payload))).Value)
+
+	err = json.Unmarshal([]byte(`{"payload": null}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(nil, wrapper.Payload)
+	should.Equal(42, payload.Value)
+
+	payload = &Payload{}
+	wrapper = &Wrapper{
+		Payload: payload,
+	}
+
+	err = Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(42, (*(wrapper.Payload.(*Payload))).Value)
+
+	err = Unmarshal([]byte(`{"payload": null}`), &wrapper)
+	should.Equal(nil, err)
+	should.Equal(nil, wrapper.Payload)
+	should.Equal(42, payload.Value)
+}
+
+func Test_unmarshal_into_nil(t *testing.T) {
+	type Payload struct {
+		Value int `json:"val,omitempty"`
+	}
+	type Wrapper struct {
+		Payload interface{} `json:"payload,omitempty"`
+	}
+
+	should := require.New(t)
+
+	var payload *Payload
+	wrapper := &Wrapper{
+		Payload: payload,
+	}
+
+	err := json.Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
+	should.Nil(err)
+	should.NotNil(wrapper.Payload)
+	should.Nil(payload)
+
+	err = json.Unmarshal([]byte(`{"payload": null}`), &wrapper)
+	should.Nil(err)
+	should.Nil(wrapper.Payload)
+	should.Nil(payload)
+
+	payload = nil
+	wrapper = &Wrapper{
+		Payload: payload,
+	}
+
+	err = Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
+	should.Nil(err)
+	should.NotNil(wrapper.Payload)
+	should.Nil(payload)
+
+	err = Unmarshal([]byte(`{"payload": null}`), &wrapper)
+	should.Nil(err)
+	should.Nil(wrapper.Payload)
+	should.Nil(payload)
+}

jsoniter_invalid_test.go

@@ -3,6 +3,7 @@ package jsoniter
 import (
 	"bytes"
 	"encoding/json"
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"io"
 	"testing"
@@ -130,3 +131,70 @@ func Test_invalid_number(t *testing.T) {
 	should.Nil(err)
 	should.Equal(string(result2), string(result))
 }
+
+func Test_valid(t *testing.T) {
+	should := require.New(t)
+	should.True(Valid([]byte(`{}`)))
+	should.False(Valid([]byte(`{`)))
+}
+
+func Test_nil_pointer(t *testing.T) {
+	should := require.New(t)
+	data := []byte(`{"A":0}`)
+	type T struct {
+		X int
+	}
+	var obj *T
+	err := Unmarshal(data, obj)
+	should.NotNil(err)
+}
+
+func Test_func_pointer_type(t *testing.T) {
+	type TestObject2 struct {
+		F func()
+	}
+	type TestObject1 struct {
+		Obj *TestObject2
+	}
+	t.Run("encode null is valid", func(t *testing.T) {
+		should := require.New(t)
+		output, err := json.Marshal(TestObject1{})
+		should.Nil(err)
+		should.Equal(`{"Obj":null}`, string(output))
+		output, err = Marshal(TestObject1{})
+		should.Nil(err)
+		should.Equal(`{"Obj":null}`, string(output))
+	})
+	t.Run("encode not null is invalid", func(t *testing.T) {
+		should := require.New(t)
+		_, err := json.Marshal(TestObject1{Obj: &TestObject2{}})
+		should.NotNil(err)
+		_, err = Marshal(TestObject1{Obj: &TestObject2{}})
+		should.NotNil(err)
+	})
+	t.Run("decode null is valid", func(t *testing.T) {
+		should := require.New(t)
+		var obj TestObject1
+		should.Nil(json.Unmarshal([]byte(`{"Obj":{"F": null}}`), &obj))
+		should.Nil(Unmarshal([]byte(`{"Obj":{"F": null}}`), &obj))
+	})
+	t.Run("decode not null is invalid", func(t *testing.T) {
+		should := require.New(t)
+		var obj TestObject1
+		should.NotNil(json.Unmarshal([]byte(`{"Obj":{"F": "hello"}}`), &obj))
+		should.NotNil(Unmarshal([]byte(`{"Obj":{"F": "hello"}}`), &obj))
+	})
+}
+
+func TestEOF(t *testing.T) {
+	var s string
+	err := ConfigCompatibleWithStandardLibrary.NewDecoder(&bytes.Buffer{}).Decode(&s)
+	assert.Equal(t, io.EOF, err)
+}
+
+func TestDecodeErrorType(t *testing.T) {
+	should := require.New(t)
+	var err error
+	should.Nil(Unmarshal([]byte("null"), &err))
+	should.NotNil(Unmarshal([]byte("123"), &err))
+}

jsoniter_null_test.go

@@ -3,9 +3,10 @@ package jsoniter
 import (
 	"bytes"
 	"encoding/json"
-	"github.com/stretchr/testify/require"
 	"io"
 	"testing"
+
+	"github.com/stretchr/testify/require"
 )
 
 func Test_read_null(t *testing.T) {
@@ -135,3 +136,33 @@ func Test_encode_nil_array(t *testing.T) {
 	should.Nil(err)
 	should.Equal("null", string(output))
 }
+
+func Test_decode_nil_num(t *testing.T) {
+	type TestData struct {
+		Field int `json:"field"`
+	}
+	should := require.New(t)
+
+	data1 := []byte(`{"field": 42}`)
+	data2 := []byte(`{"field": null}`)
+
+	// Checking stdlib behavior as well
+	obj2 := TestData{}
+	err := json.Unmarshal(data1, &obj2)
+	should.Equal(nil, err)
+	should.Equal(42, obj2.Field)
+
+	err = json.Unmarshal(data2, &obj2)
+	should.Equal(nil, err)
+	should.Equal(42, obj2.Field)
+
+	obj := TestData{}
+
+	err = Unmarshal(data1, &obj)
+	should.Equal(nil, err)
+	should.Equal(42, obj.Field)
+
+	err = Unmarshal(data2, &obj)
+	should.Equal(nil, err)
+	should.Equal(42, obj.Field)
+}

jsoniter_object_test.go

@@ -158,6 +158,28 @@ func Test_ignore_field_on_not_valid_type(t *testing.T) {
 	should.Equal(`{"field-1":"hello world"}`, str)
 }
 
+func Test_nested_field_omit_empty(t *testing.T) {
+	should := require.New(t)
+	type S1 struct {
+		F1 string `json:",omitempty"`
+	}
+
+	type S2 struct {
+		*S1
+		F2 string `json:",omitempty"`
+	}
+	s1 := &S1{
+		//F1: "abc",
+	}
+	s2 := &S2{
+		S1: s1,
+		F2: "123",
+	}
+	str, err := MarshalToString(s2)
+	should.Nil(err)
+	should.Equal(`{"F2":"123"}`, str)
+}
+
 func Test_recursive_struct(t *testing.T) {
 	should := require.New(t)
 	type TestObject struct {
@@ -328,3 +350,15 @@ func Test_decode_nested(t *testing.T) {
 		t.Fatal(slice[2])
 	}
 }
+
+func Test_decode_field_with_escape(t *testing.T) {
+	should := require.New(t)
+	type TestObject struct {
+		Field1 string
+	}
+	var obj TestObject
+	should.Nil(ConfigCompatibleWithStandardLibrary.Unmarshal([]byte(`{"Field\"1":"hello"}`), &obj))
+	should.Equal("", obj.Field1)
+	should.Nil(ConfigCompatibleWithStandardLibrary.Unmarshal([]byte(`{"\u0046ield1":"hello"}`), &obj))
+	should.Equal("hello", obj.Field1)
+}

jsoniter_raw_message_test.go

@@ -3,6 +3,7 @@ package jsoniter
 import (
 	"encoding/json"
 	"github.com/stretchr/testify/require"
+	"strings"
 	"testing"
 )
 
@@ -86,3 +87,28 @@ func Test_marshal_invalid_json_raw_message(t *testing.T) {
 	should.Equal(`{"raw":null}`, string(aout))
 	should.Nil(aouterr)
 }
+
+func Test_raw_message_memory_not_copied_issue(t *testing.T) {
+	jsonStream := `{"name":"xxxxx","bundle_id":"com.zonst.majiang","app_platform":"ios","app_category":"100103", "budget_day":1000,"bidding_min":1,"bidding_max":2,"bidding_type":"CPM", "freq":{"open":true,"type":"day","num":100},"speed":1, "targeting":{"vendor":{"open":true,"list":["zonst"]}, "geo_code":{"open":true,"list":["156110100"]},"app_category":{"open":true,"list":["100101"]}, "day_parting":{"open":true,"list":["100409","100410"]},"device_type":{"open":true,"list":["ipad"]}, "os_version":{"open":true,"list":[10]},"carrier":{"open":true,"list":["mobile"]}, "network":{"open":true,"list":["4G"]}},"url":{"tracking_imp_url":"http://www.baidu.com", "tracking_clk_url":"http://www.baidu.com","jump_url":"http://www.baidu.com","deep_link_url":"http://www.baidu.com"}}`
+	type IteratorObject struct {
+		Name        *string     `json:"name"`
+		BundleId    *string     `json:"bundle_id"`
+		AppCategory *string     `json:"app_category"`
+		AppPlatform *string     `json:"app_platform"`
+		BudgetDay   *float32    `json:"budget_day"`
+		BiddingMax  *float32    `json:"bidding_max"`
+		BiddingMin  *float32    `json:"bidding_min"`
+		BiddingType *string     `json:"bidding_type"`
+		Freq        *RawMessage `json:"freq"`
+		Targeting   *RawMessage `json:"targeting"`
+		Url         *RawMessage `json:"url"`
+		Speed       *int        `json:"speed" db:"speed"`
+	}
+
+	obj := &IteratorObject{}
+	decoder := NewDecoder(strings.NewReader(jsonStream))
+	err := decoder.Decode(obj)
+	should := require.New(t)
+	should.Nil(err)
+	should.Equal(`{"open":true,"type":"day","num":100}`, string(*obj.Freq))
+}

jsoniter_skip_test.go

@@ -104,6 +104,11 @@ func Test_skip_and_return_bytes_with_reader(t *testing.T) {
 	should.Equal(`{"a" : [{"stream": "c"}], "d": 102 }`, string(skipped))
 }
 
+func Test_skip_empty(t *testing.T) {
+	should := require.New(t)
+	should.NotNil(Get([]byte("")).LastError())
+}
+
 type TestResp struct {
 	Code uint64
 }

jsoniter_stream_test.go

@@ -51,3 +51,19 @@ func Test_writeString_should_grow_buffer(t *testing.T) {
 	should.Nil(stream.Error)
 	should.Equal(`"123"`, string(stream.Buffer()))
 }
+
+type NopWriter struct {
+	bufferSize int
+}
+
+func (w *NopWriter) Write(p []byte) (n int, err error) {
+	w.bufferSize = cap(p)
+	return len(p), nil
+}
+
+func Test_flush_buffer_should_stop_grow_buffer(t *testing.T) {
+	writer := new(NopWriter)
+	NewEncoder(writer).Encode(make([]int, 10000000))
+	should := require.New(t)
+	should.Equal(512, writer.bufferSize)
+}

jsoniter_struct_encoder_test.go

@@ -0,0 +1,52 @@
+package jsoniter
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+)
+
+func Test_encode_unexported_field(t *testing.T) {
+	type TestData struct {
+		a int
+		b <-chan int
+		C int
+		d *time.Timer
+	}
+
+	should := require.New(t)
+
+	testChan := make(<-chan int, 10)
+	testTimer := time.NewTimer(10 * time.Second)
+
+	obj := &TestData{
+		a: 42,
+		b: testChan,
+		C: 21,
+		d: testTimer,
+	}
+
+	jb, err := json.Marshal(obj)
+	should.NoError(err)
+	should.Equal([]byte(`{"C":21}`), jb)
+
+	err = json.Unmarshal([]byte(`{"a": 444, "b":"bad", "C":55, "d":{"not": "a timer"}}`), obj)
+	should.NoError(err)
+	should.Equal(42, obj.a)
+	should.Equal(testChan, obj.b)
+	should.Equal(55, obj.C)
+	should.Equal(testTimer, obj.d)
+
+	jb, err = Marshal(obj)
+	should.NoError(err)
+	should.Equal(jb, []byte(`{"C":55}`))
+
+	err = Unmarshal([]byte(`{"a": 444, "b":"bad", "C":256, "d":{"not":"a timer"}}`), obj)
+	should.NoError(err)
+	should.Equal(42, obj.a)
+	should.Equal(testChan, obj.b)
+	should.Equal(256, obj.C)
+	should.Equal(testTimer, obj.d)
+}

skip_tests/array/skip_test.go

@@ -1 +0,0 @@
-../number/skip_test.go

skip_tests/array/skip_test.go

@@ -0,0 +1,34 @@
+package test
+
+import (
+	"encoding/json"
+	"errors"
+	"github.com/json-iterator/go"
+	"github.com/stretchr/testify/require"
+	"io"
+	"testing"
+)
+
+func Test_skip(t *testing.T) {
+	for _, input := range inputs {
+		t.Run(input, func(t *testing.T) {
+			should := require.New(t)
+			var dst typeForTest
+			stdErr := json.Unmarshal([]byte(input), &dst)
+			iter := jsoniter.ParseString(jsoniter.ConfigDefault, input)
+			iter.Skip()
+			iter.ReadNil() // trigger looking forward
+			err := iter.Error
+			if err == io.EOF {
+				err = nil
+			} else {
+				err = errors.New("remaining bytes")
+			}
+			if stdErr == nil {
+				should.Nil(err)
+			} else {
+				should.NotNil(err)
+			}
+		})
+	}
+}

skip_tests/object/skip_test.go

@@ -1 +0,0 @@
-../number/skip_test.go

skip_tests/object/skip_test.go

@@ -0,0 +1,34 @@
+package test
+
+import (
+	"encoding/json"
+	"errors"
+	"github.com/json-iterator/go"
+	"github.com/stretchr/testify/require"
+	"io"
+	"testing"
+)
+
+func Test_skip(t *testing.T) {
+	for _, input := range inputs {
+		t.Run(input, func(t *testing.T) {
+			should := require.New(t)
+			var dst typeForTest
+			stdErr := json.Unmarshal([]byte(input), &dst)
+			iter := jsoniter.ParseString(jsoniter.ConfigDefault, input)
+			iter.Skip()
+			iter.ReadNil() // trigger looking forward
+			err := iter.Error
+			if err == io.EOF {
+				err = nil
+			} else {
+				err = errors.New("remaining bytes")
+			}
+			if stdErr == nil {
+				should.Nil(err)
+			} else {
+				should.NotNil(err)
+			}
+		})
+	}
+}

skip_tests/string/skip_test.go

@@ -1 +0,0 @@
-../number/skip_test.go

skip_tests/string/skip_test.go

@@ -0,0 +1,34 @@
+package test
+
+import (
+	"encoding/json"
+	"errors"
+	"github.com/json-iterator/go"
+	"github.com/stretchr/testify/require"
+	"io"
+	"testing"
+)
+
+func Test_skip(t *testing.T) {
+	for _, input := range inputs {
+		t.Run(input, func(t *testing.T) {
+			should := require.New(t)
+			var dst typeForTest
+			stdErr := json.Unmarshal([]byte(input), &dst)
+			iter := jsoniter.ParseString(jsoniter.ConfigDefault, input)
+			iter.Skip()
+			iter.ReadNil() // trigger looking forward
+			err := iter.Error
+			if err == io.EOF {
+				err = nil
+			} else {
+				err = errors.New("remaining bytes")
+			}
+			if stdErr == nil {
+				should.Nil(err)
+			} else {
+				should.NotNil(err)
+			}
+		})
+	}
+}