45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
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// Protocol Buffers - Google's data interchange format
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// Copyright 2023 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#ifndef GOOGLE_PROTOBUF_INTERNAL_VISIBILITY_H__
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#define GOOGLE_PROTOBUF_INTERNAL_VISIBILITY_H__
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namespace google {
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namespace protobuf {
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class Arena;
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class Message;
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class MessageLite;
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namespace internal {
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class InternalVisibilityForTesting;
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class InternalMetadata;
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// Empty class to use as a mandatory 'internal token' for functions that have to
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// be public, such as arena constructors, but that are for internal use only.
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class InternalVisibility {
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private:
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// Note: we don't use `InternalVisibility() = default` here, but default the
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// ctor outside of the class to force a private ctor instance.
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explicit constexpr InternalVisibility();
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friend class ::google::protobuf::Arena;
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friend class ::google::protobuf::Message;
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friend class ::google::protobuf::MessageLite;
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friend class ::google::protobuf::internal::InternalMetadata;
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friend class InternalVisibilityForTesting;
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};
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inline constexpr InternalVisibility::InternalVisibility() = default;
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} // namespace internal
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} // namespace protobuf
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} // namespace google
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#endif // GOOGLE_PROTOBUF_INTERNAL_VISIBILITY_H__
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