1 // -*- C++ -*-
2 //===----------------------------------------------------------------------===//
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef _LIBCPP___ITERATOR_DEFAULT_SENTINEL_H
11 #define _LIBCPP___ITERATOR_DEFAULT_SENTINEL_H
12 
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 #if _LIBCPP_STD_VER > 17
22 
23 struct default_sentinel_t { };
24 inline constexpr default_sentinel_t default_sentinel{};
25 
26 #endif // _LIBCPP_STD_VER > 17
27 
28 _LIBCPP_END_NAMESPACE_STD
29 
30 #endif // _LIBCPP___ITERATOR_DEFAULT_SENTINEL_H
31