libcxx/include/__iterator/default_sentinel.h

   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
  23 struct default_sentinel_t {};
  24 inline 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