protoc-gen-go/testdata/my_test/test.proto

// Go support for Protocol Buffers - Google's data interchange format
//
// Copyright 2010 The Go Authors.  All rights reserved.
// http://code.google.com/p/goprotobuf/
//
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// modification, are permitted provided that the following conditions are
// met:
//
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// notice, this list of conditions and the following disclaimer.
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//
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package my.test;  // dotted package name

//import "imp.proto";
import "multi/multi1.proto";  // unused import

enum HatType {
  // deliberately skipping 0
  FEDORA = 1;
  FEZ = 2;
}

enum Days {
  MONDAY = 1;
  TUESDAY = 2;
  LUNDI = 1;  // same value as MONDAY
}

message Request {
  enum Color {
    RED = 0;
    GREEN = 1;
    BLUE = 2;
  }
  repeated int64 key = 1;
//  optional imp.ImportedMessage imported_message = 2;
  optional Color hue = 3;
  optional HatType hat = 4 [default=FEDORA];
//  optional imp.ImportedMessage.Owner owner = 6;
  optional float deadline = 7 [default=inf];
  optional group SomeGroup = 8 {
    optional int32 group_field = 9;
  }

  // This foreign message type is in imp2.proto,
  // which is publicly imported by imp.proto.
//  optional imp.PubliclyImportedMessage pub = 10;


  optional int32 reset = 12;
}

message Reply {
  message Entry {
    required int64 key_that_needs_1234camel_CasIng = 1;
    optional int64 value = 2 [default=7];
    optional int64 _my_field_name_2 = 3;
    enum Game {
      FOOTBALL = 1;
      TENNIS = 2;
    }
  }
  repeated Entry found = 1;
  repeated int32 compact_keys = 2 [packed=true];
  extensions 100 to max;
}

message ReplyExtensions {
  extend Reply {
    optional double time = 101;
  }
}

// top-level extension
extend Reply {
  optional string tag = 103;
}

message OldReply {
  // Extensions will be encoded in MessageSet wire format.
  option message_set_wire_format = true;
  extensions 100 to max;
}