102 lines
3.6 KiB
C++
102 lines
3.6 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_LEXICOGRAPHICAL_COMPARE_H
|
|
#define _LIBCPP___ALGORITHM_RANGES_LEXICOGRAPHICAL_COMPARE_H
|
|
|
|
#include <__config>
|
|
#include <__functional/identity.h>
|
|
#include <__functional/invoke.h>
|
|
#include <__functional/ranges_operations.h>
|
|
#include <__iterator/concepts.h>
|
|
#include <__iterator/projected.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
|
|
|
|
#if _LIBCPP_STD_VER >= 20
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
namespace ranges {
|
|
namespace __lexicographical_compare {
|
|
struct __fn {
|
|
template <class _Iter1, class _Sent1, class _Iter2, class _Sent2, class _Proj1, class _Proj2, class _Comp>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr static bool __lexicographical_compare_impl(
|
|
_Iter1 __first1,
|
|
_Sent1 __last1,
|
|
_Iter2 __first2,
|
|
_Sent2 __last2,
|
|
_Comp& __comp,
|
|
_Proj1& __proj1,
|
|
_Proj2& __proj2) {
|
|
while (__first2 != __last2) {
|
|
if (__first1 == __last1 || std::invoke(__comp, std::invoke(__proj1, *__first1), std::invoke(__proj2, *__first2)))
|
|
return true;
|
|
if (std::invoke(__comp, std::invoke(__proj2, *__first2), std::invoke(__proj1, *__first1)))
|
|
return false;
|
|
++__first1;
|
|
++__first2;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
template <input_iterator _Iter1,
|
|
sentinel_for<_Iter1> _Sent1,
|
|
input_iterator _Iter2,
|
|
sentinel_for<_Iter2> _Sent2,
|
|
class _Proj1 = identity,
|
|
class _Proj2 = identity,
|
|
indirect_strict_weak_order<projected<_Iter1, _Proj1>, projected<_Iter2, _Proj2>> _Comp = ranges::less>
|
|
_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(
|
|
_Iter1 __first1,
|
|
_Sent1 __last1,
|
|
_Iter2 __first2,
|
|
_Sent2 __last2,
|
|
_Comp __comp = {},
|
|
_Proj1 __proj1 = {},
|
|
_Proj2 __proj2 = {}) const {
|
|
return __lexicographical_compare_impl(
|
|
std::move(__first1), std::move(__last1), std::move(__first2), std::move(__last2), __comp, __proj1, __proj2);
|
|
}
|
|
|
|
template <input_range _Range1,
|
|
input_range _Range2,
|
|
class _Proj1 = identity,
|
|
class _Proj2 = identity,
|
|
indirect_strict_weak_order<projected<iterator_t<_Range1>, _Proj1>, projected<iterator_t<_Range2>, _Proj2>>
|
|
_Comp = ranges::less>
|
|
_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(
|
|
_Range1&& __range1, _Range2&& __range2, _Comp __comp = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const {
|
|
return __lexicographical_compare_impl(
|
|
ranges::begin(__range1),
|
|
ranges::end(__range1),
|
|
ranges::begin(__range2),
|
|
ranges::end(__range2),
|
|
__comp,
|
|
__proj1,
|
|
__proj2);
|
|
}
|
|
};
|
|
} // namespace __lexicographical_compare
|
|
|
|
inline namespace __cpo {
|
|
inline constexpr auto lexicographical_compare = __lexicographical_compare::__fn{};
|
|
} // namespace __cpo
|
|
} // namespace ranges
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP_STD_VER >= 20
|
|
|
|
#endif // _LIBCPP___ALGORITHM_RANGES_LEXICOGRAPHICAL_COMPARE_H
|