1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___UTILITY_UNREACHABLE_H 10 #define _LIBCPP___UTILITY_UNREACHABLE_H 11 12 #include <__assert> 13 #include <__config> 14 15 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 16 # pragma GCC system_header 17 #endif 18 19 _LIBCPP_BEGIN_NAMESPACE_STD 20 21 _LIBCPP_NORETURN _LIBCPP_HIDE_FROM_ABI inline void __libcpp_unreachable() { 22 _LIBCPP_ASSERT_UNCATEGORIZED(false, "std::unreachable() was reached"); 23 __builtin_unreachable(); 24 } 25 26 #if _LIBCPP_STD_VER >= 23 27 28 [[noreturn]] _LIBCPP_HIDE_FROM_ABI inline void unreachable() { __libcpp_unreachable(); } 29 30 #endif 31 32 _LIBCPP_END_NAMESPACE_STD 33 34 #endif // _LIBCPP___UTILITY_UNREACHABLE_H 35