d1754123a9
Fixes #215, reported by Thibaud Michaud. Also related to GCC bug 79301. * spot/misc/common.hh: Here.
161 lines
4.8 KiB
C++
161 lines
4.8 KiB
C++
// -*- coding: utf-8 -*-
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// Copyright (C) 2013, 2014, 2015, 2016, 2017 Laboratoire de Recherche et
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// Développement de l'Epita (LRDE).
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//
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// This file is part of Spot, a model checking library.
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//
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// Spot is free software; you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or
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// (at your option) any later version.
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//
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// Spot is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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// License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include <cstdlib>
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#include <stdexcept>
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#include <cassert>
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#pragma once
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#ifdef __GNUC__
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#define SPOT_LIKELY(expr) __builtin_expect(!!(expr), 1)
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#define SPOT_UNLIKELY(expr) __builtin_expect(!!(expr), 0)
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#else
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#define SPOT_LIKELY(expr) (expr)
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#define SPOT_UNLIKELY(expr) (expr)
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#endif
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#ifdef __has_cpp_attribute
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# if __has_cpp_attribute(deprecated)
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# define SPOT_DEPRECATED [[deprecated]]
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# endif
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#endif
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#ifndef SPOT_DEPRECATED
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# ifdef __GNUC__
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# define SPOT_DEPRECATED __attribute__ ((deprecated))
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# elif defined(_MSC_VER)
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# define SPOT_DEPRECATED __declspec(deprecated)
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# else
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# define SPOT_DEPRECATED
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# endif
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#endif
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#if defined _WIN32 || defined __CYGWIN__
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#define SPOT_HELPER_DLL_IMPORT __declspec(dllimport)
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#define SPOT_HELPER_DLL_EXPORT __declspec(dllexport)
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#define SPOT_HELPER_DLL_LOCAL
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#else
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#if __GNUC__ >= 4
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#define SPOT_HELPER_DLL_IMPORT __attribute__ ((visibility ("default")))
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#define SPOT_HELPER_DLL_EXPORT __attribute__ ((visibility ("default")))
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#define SPOT_HELPER_DLL_LOCAL __attribute__ ((visibility ("hidden")))
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#else
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#define SPOT_HELPER_DLL_IMPORT
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#define SPOT_HELPER_DLL_EXPORT
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#define SPOT_HELPER_DLL_LOCAL
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#endif
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#endif
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#ifdef SPOT_BUILD
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#define SPOT_DLL
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#endif
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// We should not call assert() in headers. For the rare cases where
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// we do really want to call assert(), use spot_assert__ instead.
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// Else use SPOT_ASSERT so the assert() are removed from user's
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// builds.
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#define spot_assert__ assert
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#if defined(SPOT_BUILD) or defined(SPOT_DEBUG)
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#define SPOT_ASSERT(x) spot_assert__(x)
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#else
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#define SPOT_ASSERT(x) while (0)
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#endif
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// SPOT_API is used for the public API symbols. It either DLL imports
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// or DLL exports (or does nothing for static build) SPOT_LOCAL is
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// used for non-api symbols that may occur in header files.
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#ifdef SPOT_DLL
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#ifdef SPOT_BUILD
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#define SPOT_API SPOT_HELPER_DLL_EXPORT
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#else
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#define SPOT_API SPOT_HELPER_DLL_IMPORT
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#endif
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#define SPOT_LOCAL SPOT_HELPER_DLL_LOCAL
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#else
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#define SPOT_API
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#define SPOT_LOCAL
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#endif
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#define SPOT_API_VAR extern SPOT_API
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// Swig 3.0.2 does not understand 'final' when used
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// at class definition.
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#ifdef SWIG
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#define final
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#endif
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// Do not use those in code, prefer SPOT_UNREACHABLE() instead.
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#if defined __clang__ || defined __GNU__
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# define SPOT_UNREACHABLE_BUILTIN() __builtin_unreachable()
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# elif defined _MSC_VER
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# define SPOT_UNREACHABLE_BUILTIN() __assume(0)
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# else
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# define SPOT_UNREACHABLE_BUILTIN() abort()
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#endif
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// The extra parentheses in assert() is so that this
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// pattern is not caught by the style checker.
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#define SPOT_UNREACHABLE() do { \
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SPOT_ASSERT(!("unreachable code reached")); \
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SPOT_UNREACHABLE_BUILTIN(); \
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} while (0)
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#define SPOT_UNIMPLEMENTED() throw std::runtime_error("unimplemented");
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// Useful when forwarding methods such as:
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// auto func(int param) SPOT_RETURN(implem_.func(param));
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#define SPOT_RETURN(code) -> decltype(code) { return code; }
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// We hope compilers that implement -Wimplicit-fallthrough also
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// support __has_cpp_attribute and some form of [[fallthrough]]. Do
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// not use [[fallthough]] if the code is compiled in a pre-C++17
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// standard since clang's -Wpedantic would complain that we are using
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// a feature from the future.
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#ifdef __has_cpp_attribute
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# if __has_cpp_attribute(fallthrough) && __cplusplus > 201402L
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# define SPOT_FALLTHROUGH [[fallthrough]]
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# elif __has_cpp_attribute(clang::fallthrough)
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# define SPOT_FALLTHROUGH [[clang::fallthrough]]
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# elif __has_cpp_attribute(gnu::fallthrough)
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# define SPOT_FALLTHROUGH [[gnu::fallthrough]]
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# endif
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#endif
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#ifndef SPOT_FALLTHROUGH
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// Clang 3.5 does not support __has_cpp_attribute but has
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// [[clang::fallthrough]].
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# if __clang__
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# define SPOT_FALLTHROUGH [[clang::fallthrough]]
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# else
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# define SPOT_FALLTHROUGH while (0)
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# endif
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#endif
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namespace spot
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{
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struct SPOT_API parse_error: public std::runtime_error
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{
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parse_error(const std::string& s)
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: std::runtime_error(s)
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{
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}
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};
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}
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