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/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
* Wsrep-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* Wsrep-lib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with wsrep-lib. If not, see <https://www.gnu.org/licenses/>.
*/
/** @file compiler.hpp
*
* Compiler specific macro definitions.
*
* WSREP_NOEXCEPT - Specifies that the method/function does not throw. If
* and exception is thrown inside, std::terminate is called
* without propagating the exception.
* Set to "noexcept" if the compiler supports it, otherwise
* left empty.
* WSREP_NORETURN - Indicates that the method/function does not return.
* Set to attribute "[[noreturn]]" if the compiler supports,
* it, otherwise "__attribute__((noreturn))".
* WSREP_OVERRIDE - Set to "override" if the compiler supports it, otherwise
* left empty.
* WSREP_UNUSED - Can be used to mark variables which may be present in
* debug builds but not in release builds.
* WSREP_FALLTHROUGH - Silence implicit fallthrough warning.
*/
#ifndef WSREP_LIB_COMPILER_HPP
#define WSREP_LIB_COMPILER_HPP
#if __cplusplus >= 201103L && !(__GNUC__ == 4 && __GNUG_MINOR__ < 8)
#define WSREP_NORETURN [[noreturn]]
#else
#define WSREP_NORETURN __attribute__((noreturn))
#endif // __cplusplus >= 201103L && !(__GNUC__ == 4 && __GNUG_MINOR__ < 8)
#if __cplusplus >= 201103L
#define WSREP_NOEXCEPT noexcept
#define WSREP_OVERRIDE override
#else
#define WSREP_NOEXCEPT
#define WSREP_OVERRIDE
#endif // __cplusplus >= 201103L
#define WSREP_UNUSED __attribute__((unused))
#if __GNUC__ >= 7
#define WSREP_FALLTHROUGH __attribute__((fallthrough))
#elif defined(__clang__)
# if defined(__has_warning)
# if __has_feature(cxx_attributes) && __has_warning("-Wimplicit-fallthrough")
# define WSREP_FALLTHROUGH [[clang::fallthrough]]
# endif
# endif
#else // __clang __
#define WSREP_FALLTHROUGH ((void)0)
#endif // __GNUC__ >= 7 || (__clang__ && __clang_major__ >= 10)
#endif // WSREP_LIB_COMPILER_HPP
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