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 >= 20
22
23struct default_sentinel_t {};
24inline constexpr default_sentinel_t default_sentinel{};
25
26#endif // _LIBCPP_STD_VER >= 20
27
28_LIBCPP_END_NAMESPACE_STD
29
30#endif // _LIBCPP___ITERATOR_DEFAULT_SENTINEL_H
31