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d10dc5a06f
We originally put implementation-detail function objects into individual namespaces for `std::ranges` without a good reason for doing so. This practice was continued, presumably because there was prior art. Since there's no reason to keep these namespaces, this commit removes them, which will slightly impact binary size. This commit does not apply to CPOs, some of which need additional work.
108 lines
3.5 KiB
C++
108 lines
3.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ALGORITHM_RANGES_EQUAL_H
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#define _LIBCPP___ALGORITHM_RANGES_EQUAL_H
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#include <__algorithm/equal.h>
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#include <__algorithm/unwrap_range.h>
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#include <__config>
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#include <__functional/identity.h>
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#include <__functional/invoke.h>
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#include <__functional/ranges_operations.h>
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#include <__iterator/concepts.h>
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#include <__iterator/distance.h>
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#include <__iterator/indirectly_comparable.h>
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#include <__ranges/access.h>
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#include <__ranges/concepts.h>
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#include <__utility/move.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_PUSH_MACROS
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#include <__undef_macros>
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#if _LIBCPP_STD_VER >= 20
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_LIBCPP_BEGIN_NAMESPACE_STD
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namespace ranges {
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struct __equal {
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template <input_iterator _Iter1,
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sentinel_for<_Iter1> _Sent1,
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input_iterator _Iter2,
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sentinel_for<_Iter2> _Sent2,
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class _Pred = ranges::equal_to,
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class _Proj1 = identity,
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class _Proj2 = identity>
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requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>
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[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(
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_Iter1 __first1,
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_Sent1 __last1,
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_Iter2 __first2,
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_Sent2 __last2,
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_Pred __pred = {},
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_Proj1 __proj1 = {},
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_Proj2 __proj2 = {}) const {
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if constexpr (sized_sentinel_for<_Sent1, _Iter1> && sized_sentinel_for<_Sent2, _Iter2>) {
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if (__last1 - __first1 != __last2 - __first2)
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return false;
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}
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auto __unwrapped1 = std::__unwrap_range(std::move(__first1), std::move(__last1));
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auto __unwrapped2 = std::__unwrap_range(std::move(__first2), std::move(__last2));
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return std::__equal_impl(
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std::move(__unwrapped1.first),
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std::move(__unwrapped1.second),
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std::move(__unwrapped2.first),
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std::move(__unwrapped2.second),
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__pred,
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__proj1,
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__proj2);
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}
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template <input_range _Range1,
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input_range _Range2,
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class _Pred = ranges::equal_to,
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class _Proj1 = identity,
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class _Proj2 = identity>
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requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>, _Pred, _Proj1, _Proj2>
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[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(
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_Range1&& __range1, _Range2&& __range2, _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const {
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if constexpr (sized_range<_Range1> && sized_range<_Range2>) {
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if (ranges::distance(__range1) != ranges::distance(__range2))
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return false;
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}
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auto __unwrapped1 = std::__unwrap_range(ranges::begin(__range1), ranges::end(__range1));
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auto __unwrapped2 = std::__unwrap_range(ranges::begin(__range2), ranges::end(__range2));
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return std::__equal_impl(
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std::move(__unwrapped1.first),
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std::move(__unwrapped1.second),
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std::move(__unwrapped2.first),
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std::move(__unwrapped2.second),
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__pred,
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__proj1,
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__proj2);
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return false;
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}
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};
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inline namespace __cpo {
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inline constexpr auto equal = __equal{};
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} // namespace __cpo
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} // namespace ranges
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_STD_VER >= 20
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_LIBCPP_POP_MACROS
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#endif // _LIBCPP___ALGORITHM_RANGES_EQUAL_H
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