64 lines
2.4 KiB
C++
64 lines
2.4 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_LEXICOGRAPHICAL_COMPARE_H
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#define _LIBCPP___ALGORITHM_LEXICOGRAPHICAL_COMPARE_H
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#include <__algorithm/comp.h>
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#include <__algorithm/comp_ref_type.h>
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#include <__config>
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#include <__iterator/iterator_traits.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_BEGIN_NAMESPACE_STD
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template <class _Compare, class _InputIterator1, class _InputIterator2>
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_LIBCPP_CONSTEXPR_AFTER_CXX17 bool
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__lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1,
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_InputIterator2 __first2, _InputIterator2 __last2, _Compare __comp)
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{
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for (; __first2 != __last2; ++__first1, (void) ++__first2)
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{
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if (__first1 == __last1 || __comp(*__first1, *__first2))
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return true;
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if (__comp(*__first2, *__first1))
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return false;
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}
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return false;
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}
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template <class _InputIterator1, class _InputIterator2, class _Compare>
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_LIBCPP_NODISCARD_EXT inline
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
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bool
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lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1,
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_InputIterator2 __first2, _InputIterator2 __last2, _Compare __comp)
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{
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typedef typename __comp_ref_type<_Compare>::type _Comp_ref;
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return _VSTD::__lexicographical_compare<_Comp_ref>(__first1, __last1, __first2, __last2, __comp);
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}
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template <class _InputIterator1, class _InputIterator2>
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_LIBCPP_NODISCARD_EXT inline
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
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bool
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lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1,
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_InputIterator2 __first2, _InputIterator2 __last2)
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{
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return _VSTD::lexicographical_compare(__first1, __last1, __first2, __last2,
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__less<typename iterator_traits<_InputIterator1>::value_type,
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typename iterator_traits<_InputIterator2>::value_type>());
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}
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___ALGORITHM_LEXICOGRAPHICAL_COMPARE_H
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