1753f127fSDimitry Andric //===----------------------------------------------------------------------===// 2753f127fSDimitry Andric // 3753f127fSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4753f127fSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5753f127fSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6753f127fSDimitry Andric // 7753f127fSDimitry Andric //===----------------------------------------------------------------------===// 8753f127fSDimitry Andric 9753f127fSDimitry Andric #ifndef _LIBCPP___ALGORITHM_RANGES_GENERATE_H 10753f127fSDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_GENERATE_H 11753f127fSDimitry Andric 12753f127fSDimitry Andric #include <__concepts/constructible.h> 13753f127fSDimitry Andric #include <__concepts/invocable.h> 14753f127fSDimitry Andric #include <__config> 15753f127fSDimitry Andric #include <__functional/invoke.h> 16753f127fSDimitry Andric #include <__iterator/concepts.h> 17753f127fSDimitry Andric #include <__iterator/iterator_traits.h> 18753f127fSDimitry Andric #include <__ranges/access.h> 19753f127fSDimitry Andric #include <__ranges/concepts.h> 20753f127fSDimitry Andric #include <__ranges/dangling.h> 21753f127fSDimitry Andric #include <__utility/move.h> 22753f127fSDimitry Andric 23753f127fSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 24753f127fSDimitry Andric # pragma GCC system_header 25753f127fSDimitry Andric #endif 26753f127fSDimitry Andric 27*b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS 28*b3edf446SDimitry Andric #include <__undef_macros> 29*b3edf446SDimitry Andric 3006c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 31753f127fSDimitry Andric 32753f127fSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 33753f127fSDimitry Andric 34753f127fSDimitry Andric namespace ranges { 35753f127fSDimitry Andric namespace __generate { 36753f127fSDimitry Andric 37753f127fSDimitry Andric struct __fn { 38972a253aSDimitry Andric template <class _OutIter, class _Sent, class _Func> __generate_fn_impl__fn3906c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr static _OutIter __generate_fn_impl(_OutIter __first, _Sent __last, _Func& __gen) { 40972a253aSDimitry Andric for (; __first != __last; ++__first) { 41972a253aSDimitry Andric *__first = __gen(); 42972a253aSDimitry Andric } 43972a253aSDimitry Andric 44972a253aSDimitry Andric return __first; 45972a253aSDimitry Andric } 46972a253aSDimitry Andric 47753f127fSDimitry Andric template <input_or_output_iterator _OutIter, sentinel_for<_OutIter> _Sent, copy_constructible _Func> 48753f127fSDimitry Andric requires invocable<_Func&> && indirectly_writable<_OutIter, invoke_result_t<_Func&>> operator__fn4906c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr _OutIter operator()(_OutIter __first, _Sent __last, _Func __gen) const { 50972a253aSDimitry Andric return __generate_fn_impl(std::move(__first), std::move(__last), __gen); 51753f127fSDimitry Andric } 52753f127fSDimitry Andric 53753f127fSDimitry Andric template <class _Range, copy_constructible _Func> 54753f127fSDimitry Andric requires invocable<_Func&> && output_range<_Range, invoke_result_t<_Func&>> operator__fn5506c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Range> operator()(_Range&& __range, _Func __gen) const { 56972a253aSDimitry Andric return __generate_fn_impl(ranges::begin(__range), ranges::end(__range), __gen); 57753f127fSDimitry Andric } 58753f127fSDimitry Andric }; 59753f127fSDimitry Andric 60753f127fSDimitry Andric } // namespace __generate 61753f127fSDimitry Andric 62753f127fSDimitry Andric inline namespace __cpo { 63753f127fSDimitry Andric inline constexpr auto generate = __generate::__fn{}; 64753f127fSDimitry Andric } // namespace __cpo 65753f127fSDimitry Andric } // namespace ranges 66753f127fSDimitry Andric 67753f127fSDimitry Andric _LIBCPP_END_NAMESPACE_STD 68753f127fSDimitry Andric 6906c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20 70753f127fSDimitry Andric 71*b3edf446SDimitry Andric _LIBCPP_POP_MACROS 72*b3edf446SDimitry Andric 73753f127fSDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_GENERATE_H 74