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//===----------------------------------------------------------------------===//
//
// 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_SEARCH_H
#define _LIBCPP___ALGORITHM_RANGES_SEARCH_H
#include <__algorithm/iterator_operations.h>
#include <__algorithm/search.h>
#include <__config>
#include <__functional/identity.h>
#include <__functional/ranges_operations.h>
#include <__iterator/advance.h>
#include <__iterator/concepts.h>
#include <__iterator/distance.h>
#include <__iterator/indirectly_comparable.h>
#include <__ranges/access.h>
#include <__ranges/concepts.h>
#include <__ranges/size.h>
#include <__ranges/subrange.h>
#include <__utility/pair.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
#if _LIBCPP_STD_VER > 17
_LIBCPP_BEGIN_NAMESPACE_STD
namespace ranges {
namespace __search {
struct __fn {
template <class _Iter1, class _Sent1, class _Iter2, class _Sent2, class _Pred, class _Proj1, class _Proj2>
_LIBCPP_HIDE_FROM_ABI static constexpr subrange<_Iter1> __ranges_search_impl(
_Iter1 __first1,
_Sent1 __last1,
_Iter2 __first2,
_Sent2 __last2,
_Pred& __pred,
_Proj1& __proj1,
_Proj2& __proj2) {
if constexpr (sized_sentinel_for<_Sent2, _Iter2>) {
auto __size2 = ranges::distance(__first2, __last2);
if (__size2 == 0)
return {__first1, __first1};
if constexpr (sized_sentinel_for<_Sent1, _Iter1>) {
auto __size1 = ranges::distance(__first1, __last1);
if (__size1 < __size2) {
ranges::advance(__first1, __last1);
return {__first1, __first1};
}
if constexpr (random_access_iterator<_Iter1> && random_access_iterator<_Iter2>) {
auto __ret = std::__search_random_access_impl<_RangeAlgPolicy>(
__first1, __last1, __first2, __last2, __pred, __proj1, __proj2, __size1, __size2);
return {__ret.first, __ret.second};
}
}
}
auto __ret =
std::__search_forward_impl<_RangeAlgPolicy>(__first1, __last1, __first2, __last2, __pred, __proj1, __proj2);
return {__ret.first, __ret.second};
}
template <forward_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
forward_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>
_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr
subrange<_Iter1> operator()(_Iter1 __first1, _Sent1 __last1,
_Iter2 __first2, _Sent2 __last2,
_Pred __pred = {},
_Proj1 __proj1 = {},
_Proj2 __proj2 = {}) const {
return __ranges_search_impl(__first1, __last1, __first2, __last2, __pred, __proj1, __proj2);
}
template <forward_range _Range1,
forward_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>
_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr
borrowed_subrange_t<_Range1> operator()(_Range1&& __range1,
_Range2&& __range2,
_Pred __pred = {},
_Proj1 __proj1 = {},
_Proj2 __proj2 = {}) const {
auto __first1 = ranges::begin(__range1);
if constexpr (sized_range<_Range2>) {
auto __size2 = ranges::size(__range2);
if (__size2 == 0)
return {__first1, __first1};
if constexpr (sized_range<_Range1>) {
auto __size1 = ranges::size(__range1);
if (__size1 < __size2) {
ranges::advance(__first1, ranges::end(__range1));
return {__first1, __first1};
}
}
}
return __ranges_search_impl(
ranges::begin(__range1),
ranges::end(__range1),
ranges::begin(__range2),
ranges::end(__range2),
__pred,
__proj1,
__proj2);
}
};
} // namespace __search
inline namespace __cpo {
inline constexpr auto search = __search::__fn{};
} // namespace __cpo
} // namespace ranges
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP_STD_VER > 17
#endif // _LIBCPP___ALGORITHM_RANGES_SEARCH_H
|
