// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

syntax = "proto3";

package google.protobuf.python.internal;

message TestProto3Optional {
  message NestedMessage {
    // The field name "b" fails to compile in proto1 because it conflicts with
    // a local variable named "b" in one of the generated methods.  Doh.
    // This file needs to compile in proto1 to test backwards-compatibility.
    optional int32 bb = 1;
  }

  enum NestedEnum {
    UNSPECIFIED = 0;
    FOO = 1;
    BAR = 2;
    BAZ = 3;
    NEG = -1;  // Intentionally negative.
  }

  // Singular
  optional int32 optional_int32 = 1;
  optional int64 optional_int64 = 2;
  optional uint32 optional_uint32 = 3;
  optional uint64 optional_uint64 = 4;
  optional sint32 optional_sint32 = 5;
  optional sint64 optional_sint64 = 6;
  optional fixed32 optional_fixed32 = 7;
  optional fixed64 optional_fixed64 = 8;
  optional sfixed32 optional_sfixed32 = 9;
  optional sfixed64 optional_sfixed64 = 10;
  optional float optional_float = 11;
  optional double optional_double = 12;
  optional bool optional_bool = 13;
  optional string optional_string = 14;
  optional bytes optional_bytes = 15;

  optional NestedMessage optional_nested_message = 18;
  optional NestedEnum optional_nested_enum = 21;
}