Method decodeStruct

json/decode.go:1138–1232

(b []byte, p unsafe.Pointer, st *structType)

}

func (d decoder) decodeStruct(b []byte, p unsafe.Pointer, st *structType) ([]byte, error) {
	if hasNullPrefix(b) {
		return b[4:], nil
	}

	if len(b) < 2 || b[0] != '{' {
		return d.inputError(b, st.typ)
	}

	var err error
	var k []byte
	var i int

	// memory buffer used to convert short field names to lowercase
	var buf [64]byte
	var key []byte
	input := b

	b = b[1:]
	for {
		b = skipSpaces(b)

		if len(b) != 0 && b[0] == '}' {
			return b[1:], nil
		}

		if i != 0 {
			if len(b) == 0 {
				return b, syntaxError(b, "unexpected end of JSON input after object field value")
			}
			if b[0] != ',' {
				return b, syntaxError(b, "expected ',' after object field value but found '%c'", b[0])
			}
			b = skipSpaces(b[1:])
		}
		i++

		if hasNullPrefix(b) {
			return b, syntaxError(b, "cannot decode object key string from 'null' value")
		}

		k, b, _, err = d.parseStringUnquote(b, nil)
		if err != nil {
			return objectKeyError(b, err)
		}
		b = skipSpaces(b)

		if len(b) == 0 {
			return b, syntaxError(b, "unexpected end of JSON input after object field key")
		}
		if b[0] != ':' {
			return b, syntaxError(b, "expected ':' after object field key but found '%c'", b[0])
		}
		b = skipSpaces(b[1:])

		var f *structField
		if len(st.keyset) != 0 {
			if n := keyset.Lookup(st.keyset, k); n < len(st.fields) {