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