csharp/google/protobuf/c_sharp_features.proto

// Protocol Buffers - Google's data interchange format
// Copyright 2026 Google Inc.  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

syntax = "proto2";

package pb;

option csharp_namespace = "Google.Protobuf.Reflection";
option java_multiple_files = true;
option java_outer_classname = "CSharpFeaturesOuterClass";

import "google/protobuf/descriptor.proto";

extend google.protobuf.FeatureSet {
  optional CSharpFeatures csharp = 1004;
}

message CSharpFeatures {
  // Whether the generated files should have nullable reference type annotations.
  // When enabled, the generated C# code includes `#nullable enable annotations`
  // and annotates message-typed properties and certain parameters with `?`.
  optional bool nullable_reference_types = 1 [
    retention = RETENTION_RUNTIME,
    targets = TARGET_TYPE_FIELD,
    targets = TARGET_TYPE_MESSAGE,
    targets = TARGET_TYPE_FILE,
    feature_support = {
      edition_introduced: EDITION_2026,
    },
    edition_defaults = { edition: EDITION_LEGACY, value: "false" }
  ];
}