package json

Import Path
	encoding/json (on go.dev)

Dependency Relation
	imports 15 packages, and imported by 7 packages


Involved Source Files

	    decode.go
	
		Package json implements encoding and decoding of JSON as defined in
		RFC 7159. The mapping between JSON and Go values is described
		in the documentation for the Marshal and Unmarshal functions.
		
		See "JSON and Go" for an introduction to this package:
		https://golang.org/doc/articles/json_and_go.html

	    fold.go
	    indent.go
	    scanner.go
	    stream.go
	    tables.go
	    tags.go


Code Examples

	
		package main
		
		import (
			"encoding/json"
			"fmt"
			"io"
			"log"
			"strings"
		)
		
		func main() {
			const jsonStream = `
			{"Name": "Ed", "Text": "Knock knock."}
			{"Name": "Sam", "Text": "Who's there?"}
			{"Name": "Ed", "Text": "Go fmt."}
			{"Name": "Sam", "Text": "Go fmt who?"}
			{"Name": "Ed", "Text": "Go fmt yourself!"}
		`
			type Message struct {
				Name, Text string
			}
			dec := json.NewDecoder(strings.NewReader(jsonStream))
			for {
				var m Message
				if err := dec.Decode(&m); err == io.EOF {
					break
				} else if err != nil {
					log.Fatal(err)
				}
				fmt.Printf("%s: %s\n", m.Name, m.Text)
			}
		}

	
		package main
		
		import (
			"encoding/json"
			"fmt"
			"log"
			"strings"
		)
		
		func main() {
			const jsonStream = `
			[
				{"Name": "Ed", "Text": "Knock knock."},
				{"Name": "Sam", "Text": "Who's there?"},
				{"Name": "Ed", "Text": "Go fmt."},
				{"Name": "Sam", "Text": "Go fmt who?"},
				{"Name": "Ed", "Text": "Go fmt yourself!"}
			]
		`
			type Message struct {
				Name, Text string
			}
			dec := json.NewDecoder(strings.NewReader(jsonStream))
		
			// read open bracket
			t, err := dec.Token()
			if err != nil {
				log.Fatal(err)
			}
			fmt.Printf("%T: %v\n", t, t)
		
			// while the array contains values
			for dec.More() {
				var m Message
				// decode an array value (Message)
				err := dec.Decode(&m)
				if err != nil {
					log.Fatal(err)
				}
		
				fmt.Printf("%v: %v\n", m.Name, m.Text)
			}
		
			// read closing bracket
			t, err = dec.Token()
			if err != nil {
				log.Fatal(err)
			}
			fmt.Printf("%T: %v\n", t, t)
		
		}

	
		package main
		
		import (
			"encoding/json"
			"fmt"
			"io"
			"log"
			"strings"
		)
		
		func main() {
			const jsonStream = `
			{"Message": "Hello", "Array": [1, 2, 3], "Null": null, "Number": 1.234}
		`
			dec := json.NewDecoder(strings.NewReader(jsonStream))
			for {
				t, err := dec.Token()
				if err == io.EOF {
					break
				}
				if err != nil {
					log.Fatal(err)
				}
				fmt.Printf("%T: %v", t, t)
				if dec.More() {
					fmt.Printf(" (more)")
				}
				fmt.Printf("\n")
			}
		}

	
		package main
		
		import (
			"bytes"
			"encoding/json"
			"os"
		)
		
		func main() {
			var out bytes.Buffer
			json.HTMLEscape(&out, []byte(`{"Name":"<b>HTML content</b>"}`))
			out.WriteTo(os.Stdout)
		}

	
		package main
		
		import (
			"bytes"
			"encoding/json"
			"log"
			"os"
		)
		
		func main() {
			type Road struct {
				Name   string
				Number int
			}
			roads := []Road{
				{"Diamond Fork", 29},
				{"Sheep Creek", 51},
			}
		
			b, err := json.Marshal(roads)
			if err != nil {
				log.Fatal(err)
			}
		
			var out bytes.Buffer
			json.Indent(&out, b, "=", "\t")
			out.WriteTo(os.Stdout)
		}

	
		package main
		
		import (
			"encoding/json"
			"fmt"
			"os"
		)
		
		func main() {
			type ColorGroup struct {
				ID     int
				Name   string
				Colors []string
			}
			group := ColorGroup{
				ID:     1,
				Name:   "Reds",
				Colors: []string{"Crimson", "Red", "Ruby", "Maroon"},
			}
			b, err := json.Marshal(group)
			if err != nil {
				fmt.Println("error:", err)
			}
			os.Stdout.Write(b)
		}

	
		package main
		
		import (
			"encoding/json"
			"fmt"
			"log"
		)
		
		func main() {
			data := map[string]int{
				"a": 1,
				"b": 2,
			}
		
			b, err := json.MarshalIndent(data, "<prefix>", "<indent>")
			if err != nil {
				log.Fatal(err)
			}
		
			fmt.Println(string(b))
		}

	
		package main
		
		import (
			"encoding/json"
			"fmt"
			"os"
		)
		
		func main() {
			h := json.RawMessage(`{"precomputed": true}`)
		
			c := struct {
				Header *json.RawMessage `json:"header"`
				Body   string           `json:"body"`
			}{Header: &h, Body: "Hello Gophers!"}
		
			b, err := json.MarshalIndent(&c, "", "\t")
			if err != nil {
				fmt.Println("error:", err)
			}
			os.Stdout.Write(b)
		
		}

	
		package main
		
		import (
			"encoding/json"
			"fmt"
			"log"
		)
		
		func main() {
			type Color struct {
				Space string
				Point json.RawMessage // delay parsing until we know the color space
			}
			type RGB struct {
				R uint8
				G uint8
				B uint8
			}
			type YCbCr struct {
				Y  uint8
				Cb int8
				Cr int8
			}
		
			var j = []byte(`[
			{"Space": "YCbCr", "Point": {"Y": 255, "Cb": 0, "Cr": -10}},
			{"Space": "RGB",   "Point": {"R": 98, "G": 218, "B": 255}}
		]`)
			var colors []Color
			err := json.Unmarshal(j, &colors)
			if err != nil {
				log.Fatalln("error:", err)
			}
		
			for _, c := range colors {
				var dst any
				switch c.Space {
				case "RGB":
					dst = new(RGB)
				case "YCbCr":
					dst = new(YCbCr)
				}
				err := json.Unmarshal(c.Point, dst)
				if err != nil {
					log.Fatalln("error:", err)
				}
				fmt.Println(c.Space, dst)
			}
		}

	
		package main
		
		import (
			"encoding/json"
			"fmt"
		)
		
		func main() {
			var jsonBlob = []byte(`[
			{"Name": "Platypus", "Order": "Monotremata"},
			{"Name": "Quoll",    "Order": "Dasyuromorphia"}
		]`)
			type Animal struct {
				Name  string
				Order string
			}
			var animals []Animal
			err := json.Unmarshal(jsonBlob, &animals)
			if err != nil {
				fmt.Println("error:", err)
			}
			fmt.Printf("%+v", animals)
		}

	
		package main
		
		import (
			"encoding/json"
			"fmt"
		)
		
		func main() {
			goodJSON := `{"example": 1}`
			badJSON := `{"example":2:]}}`
		
			fmt.Println(json.Valid([]byte(goodJSON)), json.Valid([]byte(badJSON)))
		}

	
		package main
		
		import (
			"encoding/json"
			"fmt"
			"log"
			"strings"
		)
		
		type Animal int
		
		const (
			Unknown Animal = iota
			Gopher
			Zebra
		)
		
		func (a *Animal) UnmarshalJSON(b []byte) error {
			var s string
			if err := json.Unmarshal(b, &s); err != nil {
				return err
			}
			switch strings.ToLower(s) {
			default:
				*a = Unknown
			case "gopher":
				*a = Gopher
			case "zebra":
				*a = Zebra
			}
		
			return nil
		}
		
		func (a Animal) MarshalJSON() ([]byte, error) {
			var s string
			switch a {
			default:
				s = "unknown"
			case Gopher:
				s = "gopher"
			case Zebra:
				s = "zebra"
			}
		
			return json.Marshal(s)
		}
		
		func main() {
			blob := `["gopher","armadillo","zebra","unknown","gopher","bee","gopher","zebra"]`
			var zoo []Animal
			if err := json.Unmarshal([]byte(blob), &zoo); err != nil {
				log.Fatal(err)
			}
		
			census := make(map[Animal]int)
			for _, animal := range zoo {
				census[animal] += 1
			}
		
			fmt.Printf("Zoo Census:\n* Gophers: %d\n* Zebras:  %d\n* Unknown: %d\n",
				census[Gopher], census[Zebra], census[Unknown])
		
		}

	
		package main
		
		import (
			"encoding/json"
			"fmt"
			"log"
			"strings"
		)
		
		type Size int
		
		const (
			Unrecognized Size = iota
			Small
			Large
		)
		
		func (s *Size) UnmarshalText(text []byte) error {
			switch strings.ToLower(string(text)) {
			default:
				*s = Unrecognized
			case "small":
				*s = Small
			case "large":
				*s = Large
			}
			return nil
		}
		
		func (s Size) MarshalText() ([]byte, error) {
			var name string
			switch s {
			default:
				name = "unrecognized"
			case Small:
				name = "small"
			case Large:
				name = "large"
			}
			return []byte(name), nil
		}
		
		func main() {
			blob := `["small","regular","large","unrecognized","small","normal","small","large"]`
			var inventory []Size
			if err := json.Unmarshal([]byte(blob), &inventory); err != nil {
				log.Fatal(err)
			}
		
			counts := make(map[Size]int)
			for _, size := range inventory {
				counts[size] += 1
			}
		
			fmt.Printf("Inventory Counts:\n* Small:        %d\n* Large:        %d\n* Unrecognized: %d\n",
				counts[Small], counts[Large], counts[Unrecognized])
		
		}




Package-Level Type Names (total 36, in which 16 are exported)


	/* sort exporteds by:  |  */
	
		A Decoder reads and decodes JSON values from an input stream.

		
			
		
			
				Buffered returns a reader of the data remaining in the Decoder's
				buffer. The reader is valid until the next call to Decode.

			
				Decode reads the next JSON-encoded value from its
				input and stores it in the value pointed to by v.
				
				See the documentation for Unmarshal for details about
				the conversion of JSON into a Go value.

			
				DisallowUnknownFields causes the Decoder to return an error when the destination
				is a struct and the input contains object keys which do not match any
				non-ignored, exported fields in the destination.

			
				InputOffset returns the input stream byte offset of the current decoder position.
				The offset gives the location of the end of the most recently returned token
				and the beginning of the next token.

			
				More reports whether there is another element in the
				current array or object being parsed.

			
				Token returns the next JSON token in the input stream.
				At the end of the input stream, Token returns nil, io.EOF.
				
				Token guarantees that the delimiters [ ] { } it returns are
				properly nested and matched: if Token encounters an unexpected
				delimiter in the input, it will return an error.
				
				The input stream consists of basic JSON values—bool, string,
				number, and null—along with delimiters [ ] { } of type Delim
				to mark the start and end of arrays and objects.
				Commas and colons are elided.

			
				UseNumber causes the Decoder to unmarshal a number into an interface{} as a
				Number instead of as a float64.

			
		
			func NewDecoder(r io.Reader) *Decoder


	
		A Delim is a JSON array or object delimiter, one of [ ] { or }.

		
			( Delim) String() string
		
			 Delim : fmt.Stringer
			


	
		An Encoder writes JSON values to an output stream.

		
			
		
			
				Encode writes the JSON encoding of v to the stream,
				followed by a newline character.
				
				See the documentation for Marshal for details about the
				conversion of Go values to JSON.

			
				SetEscapeHTML specifies whether problematic HTML characters
				should be escaped inside JSON quoted strings.
				The default behavior is to escape &, <, and > to \u0026, \u003c, and \u003e
				to avoid certain safety problems that can arise when embedding JSON in HTML.
				
				In non-HTML settings where the escaping interferes with the readability
				of the output, SetEscapeHTML(false) disables this behavior.

			
				SetIndent instructs the encoder to format each subsequent encoded
				value as if indented by the package-level function Indent(dst, src, prefix, indent).
				Calling SetIndent("", "") disables indentation.

		
			*Encoder : go.uber.org/zap/zapcore.ReflectedEncoder
		
			func NewEncoder(w io.Writer) *Encoder


	
		An InvalidUnmarshalError describes an invalid argument passed to Unmarshal.
		(The argument to Unmarshal must be a non-nil pointer.)

		
			Type reflect.Type
		
			(*InvalidUnmarshalError) Error() string
		
			*InvalidUnmarshalError : error


	
		Before Go 1.2, an InvalidUTF8Error was returned by Marshal when
		attempting to encode a string value with invalid UTF-8 sequences.
		As of Go 1.2, Marshal instead coerces the string to valid UTF-8 by
		replacing invalid bytes with the Unicode replacement rune U+FFFD.
		
		Deprecated: No longer used; kept for compatibility.

		
			
				// the whole string value that caused the error

		
			(*InvalidUTF8Error) Error() string
		
			*InvalidUTF8Error : error


	
		Marshaler is the interface implemented by types that
		can marshal themselves into valid JSON.

		
			( Marshaler) MarshalJSON() ([]byte, error)
		
			 RawMessage
			 github.com/gotd/td/internal/crypto.AuthKey
			*go.opentelemetry.io/otel/attribute.Set
			 go.opentelemetry.io/otel/attribute.Value
			*go.opentelemetry.io/otel/codes.Code
			 go.opentelemetry.io/otel/trace.SpanContext
			 go.opentelemetry.io/otel/trace.SpanID
			 go.opentelemetry.io/otel/trace.TraceFlags
			 go.opentelemetry.io/otel/trace.TraceID
			 go.opentelemetry.io/otel/trace.TraceState
			*go.uber.org/atomic.Bool
			*go.uber.org/atomic.Duration
			*go.uber.org/atomic.Float32
			*go.uber.org/atomic.Float64
			*go.uber.org/atomic.Int32
			*go.uber.org/atomic.Int64
			*go.uber.org/atomic.Uint32
			*go.uber.org/atomic.Uint64
			*go.uber.org/atomic.Uintptr
			*math/big.Int
			 time.Time


	
		A MarshalerError represents an error from calling a MarshalJSON or MarshalText method.

		
			Err error
			Type reflect.Type
			
		
			(*MarshalerError) Error() string
			
				Unwrap returns the underlying error.

		
			*MarshalerError : error
			*MarshalerError : github.com/go-faster/errors.Wrapper


	
		A Number represents a JSON number literal.

		
			
				Float64 returns the number as a float64.

			
				Int64 returns the number as an int64.

			
				String returns the literal text of the number.

		
			 Number : fmt.Stringer
			


	
		RawMessage is a raw encoded JSON value.
		It implements Marshaler and Unmarshaler and can
		be used to delay JSON decoding or precompute a JSON encoding.

		
			
				MarshalJSON returns m as the JSON encoding of m.

			
				UnmarshalJSON sets *m to a copy of data.

		
			 RawMessage : Marshaler
			*RawMessage : Unmarshaler


	
		A SyntaxError is a description of a JSON syntax error.
		Unmarshal will return a SyntaxError if the JSON can't be parsed.

		
			
				// error occurred after reading Offset bytes

			
		
			(*SyntaxError) Error() string
		
			*SyntaxError : error


	
		A Token holds a value of one of these types:
		
			Delim, for the four JSON delimiters [ ] { }
			bool, for JSON booleans
			float64, for JSON numbers
			Number, for JSON numbers
			string, for JSON string literals
			nil, for JSON null

		
			func (*Decoder).Token() (Token, error)
			


	
		Unmarshaler is the interface implemented by types
		that can unmarshal a JSON description of themselves.
		The input can be assumed to be a valid encoding of
		a JSON value. UnmarshalJSON must copy the JSON data
		if it wishes to retain the data after returning.
		
		By convention, to approximate the behavior of Unmarshal itself,
		Unmarshalers implement UnmarshalJSON([]byte("null")) as a no-op.

		
			( Unmarshaler) UnmarshalJSON([]byte) error
		
			*RawMessage
			*github.com/gotd/td/internal/crypto.AuthKey
			*go.opentelemetry.io/otel/codes.Code
			*go.uber.org/atomic.Bool
			*go.uber.org/atomic.Duration
			*go.uber.org/atomic.Float32
			*go.uber.org/atomic.Float64
			*go.uber.org/atomic.Int32
			*go.uber.org/atomic.Int64
			*go.uber.org/atomic.Uint32
			*go.uber.org/atomic.Uint64
			*go.uber.org/atomic.Uintptr
			*go.uber.org/zap/zapcore.TimeEncoder
			*math/big.Int
			*time.Time
		
			


	
		An UnmarshalFieldError describes a JSON object key that
		led to an unexported (and therefore unwritable) struct field.
		
		Deprecated: No longer used; kept for compatibility.

		
			Field reflect.StructField
			Key string
			Type reflect.Type
		
			(*UnmarshalFieldError) Error() string
		
			*UnmarshalFieldError : error


	
		An UnmarshalTypeError describes a JSON value that was
		not appropriate for a value of a specific Go type.

		
			
				// the full path from root node to the field

			
				// error occurred after reading Offset bytes

			
				// name of the struct type containing the field

			
				// type of Go value it could not be assigned to

			
				// description of JSON value - "bool", "array", "number -5"

		
			(*UnmarshalTypeError) Error() string
		
			*UnmarshalTypeError : error


	
		An UnsupportedTypeError is returned by Marshal when attempting
		to encode an unsupported value type.

		
			Type reflect.Type
		
			(*UnsupportedTypeError) Error() string
		
			*UnsupportedTypeError : error


	
		An UnsupportedValueError is returned by Marshal when attempting
		to encode an unsupported value.

		
			Str string
			Value reflect.Value
		
			(*UnsupportedValueError) Error() string
		
			*UnsupportedValueError : error


	


Package-Level Functions (total 89, in which 9 are exported)


	
		Compact appends to dst the JSON-encoded src with
		insignificant space characters elided.


	
		HTMLEscape appends to dst the JSON-encoded src with <, >, &, U+2028 and U+2029
		characters inside string literals changed to \u003c, \u003e, \u0026, \u2028, \u2029
		so that the JSON will be safe to embed inside HTML <script> tags.
		For historical reasons, web browsers don't honor standard HTML
		escaping within <script> tags, so an alternative JSON encoding must be used.


	
		Indent appends to dst an indented form of the JSON-encoded src.
		Each element in a JSON object or array begins on a new,
		indented line beginning with prefix followed by one or more
		copies of indent according to the indentation nesting.
		The data appended to dst does not begin with the prefix nor
		any indentation, to make it easier to embed inside other formatted JSON data.
		Although leading space characters (space, tab, carriage return, newline)
		at the beginning of src are dropped, trailing space characters
		at the end of src are preserved and copied to dst.
		For example, if src has no trailing spaces, neither will dst;
		if src ends in a trailing newline, so will dst.


	
		Marshal returns the JSON encoding of v.
		
		Marshal traverses the value v recursively.
		If an encountered value implements the Marshaler interface
		and is not a nil pointer, Marshal calls its MarshalJSON method
		to produce JSON. If no MarshalJSON method is present but the
		value implements encoding.TextMarshaler instead, Marshal calls
		its MarshalText method and encodes the result as a JSON string.
		The nil pointer exception is not strictly necessary
		but mimics a similar, necessary exception in the behavior of
		UnmarshalJSON.
		
		Otherwise, Marshal uses the following type-dependent default encodings:
		
		Boolean values encode as JSON booleans.
		
		Floating point, integer, and Number values encode as JSON numbers.
		NaN and +/-Inf values will return an [UnsupportedValueError].
		
		String values encode as JSON strings coerced to valid UTF-8,
		replacing invalid bytes with the Unicode replacement rune.
		So that the JSON will be safe to embed inside HTML <script> tags,
		the string is encoded using HTMLEscape,
		which replaces "<", ">", "&", U+2028, and U+2029 are escaped
		to "\u003c","\u003e", "\u0026", "\u2028", and "\u2029".
		This replacement can be disabled when using an Encoder,
		by calling SetEscapeHTML(false).
		
		Array and slice values encode as JSON arrays, except that
		[]byte encodes as a base64-encoded string, and a nil slice
		encodes as the null JSON value.
		
		Struct values encode as JSON objects.
		Each exported struct field becomes a member of the object, using the
		field name as the object key, unless the field is omitted for one of the
		reasons given below.
		
		The encoding of each struct field can be customized by the format string
		stored under the "json" key in the struct field's tag.
		The format string gives the name of the field, possibly followed by a
		comma-separated list of options. The name may be empty in order to
		specify options without overriding the default field name.
		
		The "omitempty" option specifies that the field should be omitted
		from the encoding if the field has an empty value, defined as
		false, 0, a nil pointer, a nil interface value, and any empty array,
		slice, map, or string.
		
		As a special case, if the field tag is "-", the field is always omitted.
		Note that a field with name "-" can still be generated using the tag "-,".
		
		Examples of struct field tags and their meanings:
		
			// Field appears in JSON as key "myName".
			Field int `json:"myName"`
		
			// Field appears in JSON as key "myName" and
			// the field is omitted from the object if its value is empty,
			// as defined above.
			Field int `json:"myName,omitempty"`
		
			// Field appears in JSON as key "Field" (the default), but
			// the field is skipped if empty.
			// Note the leading comma.
			Field int `json:",omitempty"`
		
			// Field is ignored by this package.
			Field int `json:"-"`
		
			// Field appears in JSON as key "-".
			Field int `json:"-,"`
		
		The "string" option signals that a field is stored as JSON inside a
		JSON-encoded string. It applies only to fields of string, floating point,
		integer, or boolean types. This extra level of encoding is sometimes used
		when communicating with JavaScript programs:
		
			Int64String int64 `json:",string"`
		
		The key name will be used if it's a non-empty string consisting of
		only Unicode letters, digits, and ASCII punctuation except quotation
		marks, backslash, and comma.
		
		Anonymous struct fields are usually marshaled as if their inner exported fields
		were fields in the outer struct, subject to the usual Go visibility rules amended
		as described in the next paragraph.
		An anonymous struct field with a name given in its JSON tag is treated as
		having that name, rather than being anonymous.
		An anonymous struct field of interface type is treated the same as having
		that type as its name, rather than being anonymous.
		
		The Go visibility rules for struct fields are amended for JSON when
		deciding which field to marshal or unmarshal. If there are
		multiple fields at the same level, and that level is the least
		nested (and would therefore be the nesting level selected by the
		usual Go rules), the following extra rules apply:
		
		1) Of those fields, if any are JSON-tagged, only tagged fields are considered,
		even if there are multiple untagged fields that would otherwise conflict.
		
		2) If there is exactly one field (tagged or not according to the first rule), that is selected.
		
		3) Otherwise there are multiple fields, and all are ignored; no error occurs.
		
		Handling of anonymous struct fields is new in Go 1.1.
		Prior to Go 1.1, anonymous struct fields were ignored. To force ignoring of
		an anonymous struct field in both current and earlier versions, give the field
		a JSON tag of "-".
		
		Map values encode as JSON objects. The map's key type must either be a
		string, an integer type, or implement encoding.TextMarshaler. The map keys
		are sorted and used as JSON object keys by applying the following rules,
		subject to the UTF-8 coercion described for string values above:
		  - keys of any string type are used directly
		  - encoding.TextMarshalers are marshaled
		  - integer keys are converted to strings
		
		Pointer values encode as the value pointed to.
		A nil pointer encodes as the null JSON value.
		
		Interface values encode as the value contained in the interface.
		A nil interface value encodes as the null JSON value.
		
		Channel, complex, and function values cannot be encoded in JSON.
		Attempting to encode such a value causes Marshal to return
		an UnsupportedTypeError.
		
		JSON cannot represent cyclic data structures and Marshal does not
		handle them. Passing cyclic structures to Marshal will result in
		an error.


	
		MarshalIndent is like Marshal but applies Indent to format the output.
		Each JSON element in the output will begin on a new line beginning with prefix
		followed by one or more copies of indent according to the indentation nesting.


	
		NewDecoder returns a new decoder that reads from r.
		
		The decoder introduces its own buffering and may
		read data from r beyond the JSON values requested.


	
		NewEncoder returns a new encoder that writes to w.


	
		Unmarshal parses the JSON-encoded data and stores the result
		in the value pointed to by v. If v is nil or not a pointer,
		Unmarshal returns an InvalidUnmarshalError.
		
		Unmarshal uses the inverse of the encodings that
		Marshal uses, allocating maps, slices, and pointers as necessary,
		with the following additional rules:
		
		To unmarshal JSON into a pointer, Unmarshal first handles the case of
		the JSON being the JSON literal null. In that case, Unmarshal sets
		the pointer to nil. Otherwise, Unmarshal unmarshals the JSON into
		the value pointed at by the pointer. If the pointer is nil, Unmarshal
		allocates a new value for it to point to.
		
		To unmarshal JSON into a value implementing the Unmarshaler interface,
		Unmarshal calls that value's UnmarshalJSON method, including
		when the input is a JSON null.
		Otherwise, if the value implements encoding.TextUnmarshaler
		and the input is a JSON quoted string, Unmarshal calls that value's
		UnmarshalText method with the unquoted form of the string.
		
		To unmarshal JSON into a struct, Unmarshal matches incoming object
		keys to the keys used by Marshal (either the struct field name or its tag),
		preferring an exact match but also accepting a case-insensitive match. By
		default, object keys which don't have a corresponding struct field are
		ignored (see Decoder.DisallowUnknownFields for an alternative).
		
		To unmarshal JSON into an interface value,
		Unmarshal stores one of these in the interface value:
		
			bool, for JSON booleans
			float64, for JSON numbers
			string, for JSON strings
			[]interface{}, for JSON arrays
			map[string]interface{}, for JSON objects
			nil for JSON null
		
		To unmarshal a JSON array into a slice, Unmarshal resets the slice length
		to zero and then appends each element to the slice.
		As a special case, to unmarshal an empty JSON array into a slice,
		Unmarshal replaces the slice with a new empty slice.
		
		To unmarshal a JSON array into a Go array, Unmarshal decodes
		JSON array elements into corresponding Go array elements.
		If the Go array is smaller than the JSON array,
		the additional JSON array elements are discarded.
		If the JSON array is smaller than the Go array,
		the additional Go array elements are set to zero values.
		
		To unmarshal a JSON object into a map, Unmarshal first establishes a map to
		use. If the map is nil, Unmarshal allocates a new map. Otherwise Unmarshal
		reuses the existing map, keeping existing entries. Unmarshal then stores
		key-value pairs from the JSON object into the map. The map's key type must
		either be any string type, an integer, implement json.Unmarshaler, or
		implement encoding.TextUnmarshaler.
		
		If the JSON-encoded data contain a syntax error, Unmarshal returns a SyntaxError.
		
		If a JSON value is not appropriate for a given target type,
		or if a JSON number overflows the target type, Unmarshal
		skips that field and completes the unmarshaling as best it can.
		If no more serious errors are encountered, Unmarshal returns
		an UnmarshalTypeError describing the earliest such error. In any
		case, it's not guaranteed that all the remaining fields following
		the problematic one will be unmarshaled into the target object.
		
		The JSON null value unmarshals into an interface, map, pointer, or slice
		by setting that Go value to nil. Because null is often used in JSON to mean
		“not present,” unmarshaling a JSON null into any other Go type has no effect
		on the value and produces no error.
		
		When unmarshaling quoted strings, invalid UTF-8 or
		invalid UTF-16 surrogate pairs are not treated as an error.
		Instead, they are replaced by the Unicode replacement
		character U+FFFD.


	
		Valid reports whether data is a valid JSON encoding.


	


Package-Level Variables (total 14, none are exported)

	


Package-Level Constants (total 28, none are exported)