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Filename : compiler-specific.h

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// Copyright 2020 the V8 project 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 INCLUDE_CPPGC_INTERNAL_COMPILER_SPECIFIC_H_
#define INCLUDE_CPPGC_INTERNAL_COMPILER_SPECIFIC_H_

namespace cppgc {

#if defined(__has_attribute)
#define CPPGC_HAS_ATTRIBUTE(FEATURE) __has_attribute(FEATURE)
#else
#define CPPGC_HAS_ATTRIBUTE(FEATURE) 0
#endif

#if defined(__has_cpp_attribute)
#define CPPGC_HAS_CPP_ATTRIBUTE(FEATURE) __has_cpp_attribute(FEATURE)
#else
#define CPPGC_HAS_CPP_ATTRIBUTE(FEATURE) 0
#endif

// [[no_unique_address]] comes in C++20 but supported in clang with -std >=
// c++11.
#if CPPGC_HAS_CPP_ATTRIBUTE(no_unique_address)
#define CPPGC_NO_UNIQUE_ADDRESS [[no_unique_address]]
#else
#define CPPGC_NO_UNIQUE_ADDRESS
#endif

#if CPPGC_HAS_ATTRIBUTE(unused)
#define CPPGC_UNUSED __attribute__((unused))
#else
#define CPPGC_UNUSED
#endif

}  // namespace cppgc

#endif  // INCLUDE_CPPGC_INTERNAL_COMPILER_SPECIFIC_H_