rewrite how eface and iface are handled

value_tests/eface_test.go

@@ -0,0 +1,78 @@
+package test
+
+func init() {
+	var pEFace = func(val interface{}) *interface{} {
+		return &val
+	}
+	var pInt = func(val int) *int {
+		return &val
+	}
+	unmarshalCases = append(unmarshalCases, unmarshalCase{
+		ptr: (**interface{})(nil),
+		input: `"hello"`,
+	}, unmarshalCase{
+		ptr: (**interface{})(nil),
+		input: `1e1`,
+	}, unmarshalCase{
+		ptr: (**interface{})(nil),
+		input: `1.0e1`,
+	}, unmarshalCase{
+		ptr: (*[]interface{})(nil),
+		input: `[1.0e1]`,
+	}, unmarshalCase{
+		ptr: (*struct {
+			Field interface{}
+		})(nil),
+		input: `{"field":"hello"}`,
+	}, unmarshalCase{
+		obj: func() interface{} {
+			type TestData struct {
+				Name string `json:"name"`
+			}
+			o := &TestData{}
+			return &o
+		},
+		input: `{"name":"value"}`,
+	}, unmarshalCase{
+		obj: func() interface{} {
+			b := true
+			return &struct {
+				Field interface{} `json:"field"`
+			}{&b}
+		},
+		input: `{"field": null}`,
+	}, unmarshalCase{
+		obj: func() interface{} {
+			var pb *bool
+			return &struct {
+				Field interface{} `json:"field"`
+			}{&pb}
+		},
+		input: `{"field": null}`,
+	}, unmarshalCase{
+		obj: func() interface{} {
+			b := true
+			pb := &b
+			return &struct {
+				Field interface{} `json:"field"`
+			}{&pb}
+		},
+		input: `{"field": null}`,
+	})
+	marshalCases = append(marshalCases,
+		pEFace("hello"),
+		struct {
+			Field interface{}
+		}{"hello"},
+		struct {
+			Field interface{}
+		}{struct{
+			field chan int
+		}{}},
+		struct {
+			Field interface{}
+		}{struct{
+			Field *int
+		}{pInt(100)}},
+	)
+}