src/google/protobuf/unittest_mset.proto

// Protocol Buffers - Google's data interchange format
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// https://developers.google.com/protocol-buffers/
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// Author: kenton@google.com (Kenton Varda)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.
//
// This file contains messages for testing message_set_wire_format.

package protobuf_unittest;

option optimize_for = SPEED;

// A message with message_set_wire_format.
message TestMessageSet {
  option message_set_wire_format = true;
  extensions 4 to max;
}

message TestMessageSetContainer {
  optional TestMessageSet message_set = 1;
}

message TestMessageSetExtension1 {
  extend TestMessageSet {
    optional TestMessageSetExtension1 message_set_extension = 1545008;
  }
  optional int32 i = 15;
}

message TestMessageSetExtension2 {
  extend TestMessageSet {
    optional TestMessageSetExtension2 message_set_extension = 1547769;
  }
  optional string str = 25;
}

// This message was used to generate
// //net/proto2/python/internal/testdata/message_set_message, but is commented
// out since it must not actually exist in code, to simulate an "unknown"
// extension.
// message TestMessageSetUnknownExtension {
//   extend TestMessageSet {
//     optional TestMessageSetUnknownExtension message_set_extension = 56141421;
//   }
//   optional int64 a = 1;
// }

// MessageSet wire format is equivalent to this.
message RawMessageSet {
  repeated group Item = 1 {
    required int32 type_id = 2;
    required bytes message = 3;
  }
}