maybe_unused.hpp

Go to the documentation of this file.

// Copyright 2024, Toyota Motor Corporation
//
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
#ifndef INCLUDE_GUARD_ARENE_BASE_ARENE_BASE_COMPILER_SUPPORT_ATTRIBUTES_MAYBE_UNUSED_HPP_
#define INCLUDE_GUARD_ARENE_BASE_ARENE_BASE_COMPILER_SUPPORT_ATTRIBUTES_MAYBE_UNUSED_HPP_
 
// IWYU pragma: private, include "arene/base/compiler_support/attributes.hpp"
 
#include "arene/base/compiler_support/attributes/has_attribute.hpp"
 
// NOLINTBEGIN(cppcoreguidelines-macro-usage) Explicitly providing compiler support macro functions
// parasoft-begin-suppress AUTOSAR-A16_0_1-d-2 "Conditional defines permitted by A16-0-1 Permit #2"
// parasoft-begin-suppress AUTOSAR-A16_0_1-a-2 "Conditional defines permitted by A16-0-1 Permit #2"
 
/// @def ARENE_MAYBE_UNUSED
/// @brief An alias for @c [[maybe_unused]] , or a no-op if the attribute is not supported
// parasoft-begin-suppress AUTOSAR-M16_0_7-a-2 "False positive: gnu and unused not used as a macro"
#if ARENE_HAS_STD_ATTRIBUTE(gnu::unused)
#define ARENE_MAYBE_UNUSED [[gnu::unused]]
#elif ARENE_HAS_STD_ATTRIBUTE(maybe_unused) >= 201603L
#define ARENE_MAYBE_UNUSED [[maybe_unused]]
#else
#define ARENE_MAYBE_UNUSED
#endif
// parasoft-end-suppress AUTOSAR-M16_0_7-a-2
 
// NOLINTEND(cppcoreguidelines-macro-usage) Explicitly providing compiler support macro functions
// parasoft-end-suppress AUTOSAR-A16_0_1-d-2
// parasoft-end-suppress AUTOSAR-A16_0_1-a-2
 
#endif  // INCLUDE_GUARD_ARENE_BASE_ARENE_BASE_COMPILER_SUPPORT_ATTRIBUTES_MAYBE_UNUSED_HPP_