internal/testprotos/examples/ext/extexample.proto

// Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

edition = "2023";

package goproto.proto.test;

import "google/protobuf/go_features.proto";

option go_package = "google.golang.org/protobuf/internal/testprotos/examples/ext";
option features.(pb.go).api_level = API_OPAQUE;

message Concert {
  string headliner_name = 1;

  extensions 100 to 199 [
    declaration = {
      number: 123,
      full_name: ".goproto.proto.test.promo_id",
      type: "int32",
    },
    // Ensures all field numbers in this extension range are declarations.
    verification = DECLARATION
  ];
}

// Typically, this extension would be declared in a separate file,
// but for brevity, we declare the entire example in one file.
extend Concert {
  int32 promo_id = 123;
}