176d0caaeSpatrick // -*- C++ -*- 276d0caaeSpatrick //===----------------------------------------------------------------------===// 376d0caaeSpatrick // 476d0caaeSpatrick // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 576d0caaeSpatrick // See https://llvm.org/LICENSE.txt for license information. 676d0caaeSpatrick // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 776d0caaeSpatrick // 876d0caaeSpatrick //===----------------------------------------------------------------------===// 9*4bdff4beSrobert 1076d0caaeSpatrick #ifndef _LIBCPP___ITERATOR_PROJECTED_H 1176d0caaeSpatrick #define _LIBCPP___ITERATOR_PROJECTED_H 1276d0caaeSpatrick 1376d0caaeSpatrick #include <__config> 1476d0caaeSpatrick #include <__iterator/concepts.h> 1576d0caaeSpatrick #include <__iterator/incrementable_traits.h> 16*4bdff4beSrobert #include <__type_traits/remove_cvref.h> 1776d0caaeSpatrick 1876d0caaeSpatrick #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 1976d0caaeSpatrick # pragma GCC system_header 2076d0caaeSpatrick #endif 2176d0caaeSpatrick 2276d0caaeSpatrick _LIBCPP_BEGIN_NAMESPACE_STD 2376d0caaeSpatrick 24*4bdff4beSrobert #if _LIBCPP_STD_VER > 17 2576d0caaeSpatrick 2676d0caaeSpatrick template<indirectly_readable _It, indirectly_regular_unary_invocable<_It> _Proj> 2776d0caaeSpatrick struct projected { 2876d0caaeSpatrick using value_type = remove_cvref_t<indirect_result_t<_Proj&, _It>>; 2976d0caaeSpatrick indirect_result_t<_Proj&, _It> operator*() const; // not defined 3076d0caaeSpatrick }; 3176d0caaeSpatrick 3276d0caaeSpatrick template<weakly_incrementable _It, class _Proj> 3376d0caaeSpatrick struct incrementable_traits<projected<_It, _Proj>> { 3476d0caaeSpatrick using difference_type = iter_difference_t<_It>; 3576d0caaeSpatrick }; 3676d0caaeSpatrick 37*4bdff4beSrobert #endif // _LIBCPP_STD_VER > 17 3876d0caaeSpatrick 3976d0caaeSpatrick _LIBCPP_END_NAMESPACE_STD 4076d0caaeSpatrick 4176d0caaeSpatrick #endif // _LIBCPP___ITERATOR_PROJECTED_H 42