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// Copyright 2022 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef SRC_DAWN_NATIVE_VISITABLE_H_
#define SRC_DAWN_NATIVE_VISITABLE_H_
#include <utility>
#include "dawn/native/stream/BlobSource.h"
#include "dawn/native/stream/ByteVectorSink.h"
#include "dawn/native/stream/Stream.h"
// Helper for X macro to declare a visitable member.
#define DAWN_INTERNAL_VISITABLE_MEMBER_DECL(type, name) type name{};
// Helper for X macro for visiting a visitable member.
#define DAWN_INTERNAL_VISITABLE_MEMBER_ARG(type, name) , name
namespace dawn::native::detail {
constexpr int kInternalVisitableUnusedForComma = 0;
} // namespace dawn::native::detail
// Helper X macro to declare members of a class or struct, along with VisitAll
// methods to call a functor on all members.
// Example usage:
// #define MEMBERS(X) \
// X(int, a) \
// X(float, b) \
// X(Foo, foo) \
// X(Bar, bar)
// struct MyStruct {
// DAWN_VISITABLE_MEMBERS(MEMBERS)
// };
// #undef MEMBERS
#define DAWN_VISITABLE_MEMBERS(MEMBERS) \
MEMBERS(DAWN_INTERNAL_VISITABLE_MEMBER_DECL) \
\
template <typename V> \
constexpr auto VisitAll(V&& visit) const { \
return [&](int, const auto&... ms) { \
return visit(ms...); \
}(::dawn::native::detail::kInternalVisitableUnusedForComma MEMBERS( \
DAWN_INTERNAL_VISITABLE_MEMBER_ARG)); \
} \
\
template <typename V> \
constexpr auto VisitAll(V&& visit) { \
return [&](int, auto&... ms) { \
return visit(ms...); \
}(::dawn::native::detail::kInternalVisitableUnusedForComma MEMBERS( \
DAWN_INTERNAL_VISITABLE_MEMBER_ARG)); \
}
#endif // SRC_DAWN_NATIVE_VISITABLE_H_