mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 15:03:34 +00:00
109 lines
3.5 KiB
C++
109 lines
3.5 KiB
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___ALGORITHM_RANGES_EQUAL_H
|
|
#define _LIBCPP___ALGORITHM_RANGES_EQUAL_H
|
|
|
|
#include <__algorithm/equal.h>
|
|
#include <__algorithm/unwrap_range.h>
|
|
#include <__config>
|
|
#include <__functional/identity.h>
|
|
#include <__functional/invoke.h>
|
|
#include <__functional/ranges_operations.h>
|
|
#include <__iterator/concepts.h>
|
|
#include <__iterator/distance.h>
|
|
#include <__iterator/indirectly_comparable.h>
|
|
#include <__ranges/access.h>
|
|
#include <__ranges/concepts.h>
|
|
#include <__utility/move.h>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_PUSH_MACROS
|
|
#include <__undef_macros>
|
|
|
|
#if _LIBCPP_STD_VER >= 20
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
namespace ranges {
|
|
namespace __equal {
|
|
struct __fn {
|
|
template <input_iterator _Iter1,
|
|
sentinel_for<_Iter1> _Sent1,
|
|
input_iterator _Iter2,
|
|
sentinel_for<_Iter2> _Sent2,
|
|
class _Pred = ranges::equal_to,
|
|
class _Proj1 = identity,
|
|
class _Proj2 = identity>
|
|
requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>
|
|
[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(
|
|
_Iter1 __first1,
|
|
_Sent1 __last1,
|
|
_Iter2 __first2,
|
|
_Sent2 __last2,
|
|
_Pred __pred = {},
|
|
_Proj1 __proj1 = {},
|
|
_Proj2 __proj2 = {}) const {
|
|
if constexpr (sized_sentinel_for<_Sent1, _Iter1> && sized_sentinel_for<_Sent2, _Iter2>) {
|
|
if (__last1 - __first1 != __last2 - __first2)
|
|
return false;
|
|
}
|
|
auto __unwrapped1 = std::__unwrap_range(std::move(__first1), std::move(__last1));
|
|
auto __unwrapped2 = std::__unwrap_range(std::move(__first2), std::move(__last2));
|
|
return std::__equal_impl(
|
|
std::move(__unwrapped1.first),
|
|
std::move(__unwrapped1.second),
|
|
std::move(__unwrapped2.first),
|
|
std::move(__unwrapped2.second),
|
|
__pred,
|
|
__proj1,
|
|
__proj2);
|
|
}
|
|
|
|
template <input_range _Range1,
|
|
input_range _Range2,
|
|
class _Pred = ranges::equal_to,
|
|
class _Proj1 = identity,
|
|
class _Proj2 = identity>
|
|
requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>, _Pred, _Proj1, _Proj2>
|
|
[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(
|
|
_Range1&& __range1, _Range2&& __range2, _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const {
|
|
if constexpr (sized_range<_Range1> && sized_range<_Range2>) {
|
|
if (ranges::distance(__range1) != ranges::distance(__range2))
|
|
return false;
|
|
}
|
|
auto __unwrapped1 = std::__unwrap_range(ranges::begin(__range1), ranges::end(__range1));
|
|
auto __unwrapped2 = std::__unwrap_range(ranges::begin(__range2), ranges::end(__range2));
|
|
return std::__equal_impl(
|
|
std::move(__unwrapped1.first),
|
|
std::move(__unwrapped1.second),
|
|
std::move(__unwrapped2.first),
|
|
std::move(__unwrapped2.second),
|
|
__pred,
|
|
__proj1,
|
|
__proj2);
|
|
return false;
|
|
}
|
|
};
|
|
} // namespace __equal
|
|
|
|
inline namespace __cpo {
|
|
inline constexpr auto equal = __equal::__fn{};
|
|
} // namespace __cpo
|
|
} // namespace ranges
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP_STD_VER >= 20
|
|
|
|
_LIBCPP_POP_MACROS
|
|
|
|
#endif // _LIBCPP___ALGORITHM_RANGES_EQUAL_H
|