src/google/protobuf/cpp_file_options.proto

// Protocol Buffers - Google's data interchange format
// Copyright 2026 Google LLC.  All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd

edition = "2024";

package pb.file;

import "google/protobuf/descriptor.proto";

extend google.protobuf.FileOptions {
  CppFileOptions cpp = 990
      [feature_support = { edition_introduced: EDITION_UNSTABLE }];
}

local message CppFileOptions {
  // Use this option to change the namespace of cpp generated classes. When this
  // option is not set, the package name will be used for determining the cpp
  // namespace.
  string namespace = 1;
}