Method unmarshalMessage

encoding/prototext/decode.go:106–256

unmarshalMessage unmarshals into the given protoreflect.Message.

(m protoreflect.Message, checkDelims bool)

// unmarshalMessage unmarshals into the given protoreflect.Message.
func (d decoder) unmarshalMessage(m protoreflect.Message, checkDelims bool) error {
	messageDesc := m.Descriptor()
	if !flags.ProtoLegacy && messageset.IsMessageSet(messageDesc) {
		return errors.New("no support for proto1 MessageSets")
	}

	if messageDesc.FullName() == genid.Any_message_fullname {
		return d.unmarshalAny(m, checkDelims)
	}

	if checkDelims {
		tok, err := d.Read()
		if err != nil {
			return err
		}

		if tok.Kind() != text.MessageOpen {
			return d.unexpectedTokenError(tok)
		}
	}

	var seenNums set.Ints
	var seenOneofs set.Ints
	fieldDescs := messageDesc.Fields()

	for {
		// Read field name.
		tok, err := d.Read()
		if err != nil {
			return err
		}
		switch typ := tok.Kind(); typ {
		case text.Name:
			// Continue below.
		case text.EOF:
			if checkDelims {
				return text.ErrUnexpectedEOF
			}
			return nil
		default:
			if checkDelims && typ == text.MessageClose {
				return nil
			}
			return d.unexpectedTokenError(tok)
		}

		// Resolve the field descriptor.
		var name protoreflect.Name
		var fd protoreflect.FieldDescriptor
		var xt protoreflect.ExtensionType
		var xtErr error
		var isFieldNumberName bool

		switch tok.NameKind() {
		case text.IdentName:
			name = protoreflect.Name(tok.IdentName())
			fd = fieldDescs.ByTextName(string(name))