protoc_plugin/test/protos/message_set.proto

// Copyright (c) 2023, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

syntax = "proto2";

message MessageSet {
  option message_set_wire_format = true;

  extensions 4 to 524999999;
  extensions 525000000 to max;
}

message TestMessage {
  extend MessageSet {
    optional ExtensionMessage1 ext1 = 1758024;
    optional ExtensionMessage2 ext2 = 1832098;
  }

  optional MessageSet info = 1;
  optional int32 i = 2;
}

message ExtensionMessage1 {
  optional int32 a = 1;
  optional string b = 2;
  optional ExtensionMessage2 c = 3;
}

message ExtensionMessage2 {
  repeated int32 ints = 5;
}