// 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_