| // Copyright 2018 The Chromium Authors | 
 | // Use of this source code is governed by a BSD-style license that can be | 
 | // found in the LICENSE file. | 
 |  | 
 | #ifndef IPC_MESSAGE_MOJOM_TRAITS_H_ | 
 | #define IPC_MESSAGE_MOJOM_TRAITS_H_ | 
 |  | 
 | #include <optional> | 
 | #include <vector> | 
 |  | 
 | #include "base/containers/span.h" | 
 | #include "ipc/ipc.mojom-shared.h" | 
 | #include "ipc/message_view.h" | 
 | #include "mojo/public/cpp/bindings/struct_traits.h" | 
 | #include "mojo/public/interfaces/bindings/native_struct.mojom.h" | 
 |  | 
 | namespace mojo { | 
 |  | 
 | template <> | 
 | class StructTraits<IPC::mojom::MessageDataView, IPC::MessageView> { | 
 |  public: | 
 |   static base::span<const uint8_t> bytes(IPC::MessageView& view); | 
 |   static std::optional<std::vector<mojo::native::SerializedHandlePtr>> handles( | 
 |       IPC::MessageView& view); | 
 |  | 
 |   static bool Read(IPC::mojom::MessageDataView data, IPC::MessageView* out); | 
 | }; | 
 |  | 
 | }  // namespace mojo | 
 |  | 
 | #endif  // IPC_MESSAGE_MOJOM_TRAITS_H_ |