| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef MOJO_PUBLIC_CPP_BINDINGS_ENUM_TRAITS_H_ |
| #define MOJO_PUBLIC_CPP_BINDINGS_ENUM_TRAITS_H_ |
| |
| #include "mojo/public/cpp/bindings/lib/template_util.h" |
| |
| namespace mojo { |
| |
| // This must be specialized for any type |T| to be serialized/deserialized as a |
| // mojom enum |MojomType|. Each specialization needs to implement: |
| // |
| // template <> |
| // struct EnumTraits<MojomType, T> { |
| // static MojomType ToMojom(T input); |
| // |
| // // Returning false results in deserialization failure and causes the |
| // // message pipe receiving it to be disconnected. |
| // static bool FromMojom(MojomType input, T* output); |
| // }; |
| // |
| template <typename MojomType, typename T> |
| struct EnumTraits { |
| static_assert(internal::AlwaysFalse<T>::value, |
| "Cannot find the mojo::EnumTraits specialization. Did you " |
| "forget to include the corresponding header file?"); |
| }; |
| |
| } // namespace mojo |
| |
| #endif // MOJO_PUBLIC_CPP_BINDINGS_ENUM_TRAITS_H_ |
