1*4bdff4beSrobert //===----------------------------------------------------------------------===// 2*4bdff4beSrobert // 3*4bdff4beSrobert // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*4bdff4beSrobert // See https://llvm.org/LICENSE.txt for license information. 5*4bdff4beSrobert // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*4bdff4beSrobert // 7*4bdff4beSrobert //===----------------------------------------------------------------------===// 8*4bdff4beSrobert 9*4bdff4beSrobert #ifndef _LIBCPP___ALGORITHM_RANGES_COUNT_H 10*4bdff4beSrobert #define _LIBCPP___ALGORITHM_RANGES_COUNT_H 11*4bdff4beSrobert 12*4bdff4beSrobert #include <__algorithm/ranges_count_if.h> 13*4bdff4beSrobert #include <__config> 14*4bdff4beSrobert #include <__functional/identity.h> 15*4bdff4beSrobert #include <__functional/ranges_operations.h> 16*4bdff4beSrobert #include <__iterator/concepts.h> 17*4bdff4beSrobert #include <__iterator/incrementable_traits.h> 18*4bdff4beSrobert #include <__iterator/iterator_traits.h> 19*4bdff4beSrobert #include <__iterator/projected.h> 20*4bdff4beSrobert #include <__ranges/access.h> 21*4bdff4beSrobert #include <__ranges/concepts.h> 22*4bdff4beSrobert #include <__utility/move.h> 23*4bdff4beSrobert 24*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 25*4bdff4beSrobert # pragma GCC system_header 26*4bdff4beSrobert #endif 27*4bdff4beSrobert 28*4bdff4beSrobert #if _LIBCPP_STD_VER > 17 29*4bdff4beSrobert 30*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD 31*4bdff4beSrobert 32*4bdff4beSrobert namespace ranges { 33*4bdff4beSrobert namespace __count { 34*4bdff4beSrobert struct __fn { 35*4bdff4beSrobert template <input_iterator _Iter, sentinel_for<_Iter> _Sent, class _Type, class _Proj = identity> 36*4bdff4beSrobert requires indirect_binary_predicate<ranges::equal_to, projected<_Iter, _Proj>, const _Type*> 37*4bdff4beSrobert _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr operator__fn38*4bdff4beSrobert iter_difference_t<_Iter> operator()(_Iter __first, _Sent __last, const _Type& __value, _Proj __proj = {}) const { 39*4bdff4beSrobert auto __pred = [&](auto&& __e) { return __e == __value; }; 40*4bdff4beSrobert return ranges::__count_if_impl(std::move(__first), std::move(__last), __pred, __proj); 41*4bdff4beSrobert } 42*4bdff4beSrobert 43*4bdff4beSrobert template <input_range _Range, class _Type, class _Proj = identity> 44*4bdff4beSrobert requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*> 45*4bdff4beSrobert _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr operator__fn46*4bdff4beSrobert range_difference_t<_Range> operator()(_Range&& __r, const _Type& __value, _Proj __proj = {}) const { 47*4bdff4beSrobert auto __pred = [&](auto&& __e) { return __e == __value; }; 48*4bdff4beSrobert return ranges::__count_if_impl(ranges::begin(__r), ranges::end(__r), __pred, __proj); 49*4bdff4beSrobert } 50*4bdff4beSrobert }; 51*4bdff4beSrobert } // namespace __count 52*4bdff4beSrobert 53*4bdff4beSrobert inline namespace __cpo { 54*4bdff4beSrobert inline constexpr auto count = __count::__fn{}; 55*4bdff4beSrobert } // namespace __cpo 56*4bdff4beSrobert } // namespace ranges 57*4bdff4beSrobert 58*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD 59*4bdff4beSrobert 60*4bdff4beSrobert #endif // _LIBCPP_STD_VER > 17 61*4bdff4beSrobert 62*4bdff4beSrobert #endif // _LIBCPP___ALGORITHM_RANGES_COUNT_H 63