text: // -*- C++ -*-
  //===----------------------------------------------------------------------===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  
  #ifndef _LIBCPP___ITERATOR_DEFAULT_SENTINEL_H
  #define _LIBCPP___ITERATOR_DEFAULT_SENTINEL_H
  
  #include <__config>
  
  #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  #  pragma GCC system_header
  #endif
  
  _LIBCPP_BEGIN_NAMESPACE_STD
  
  #if _LIBCPP_STD_VER > 17
  
  struct default_sentinel_t { };
  inline constexpr default_sentinel_t default_sentinel{};
  
  #endif // _LIBCPP_STD_VER > 17
  
  _LIBCPP_END_NAMESPACE_STD
  
  #endif // _LIBCPP___ITERATOR_DEFAULT_SENTINEL_H
  