1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef _LIBCPP___ALGORITHM_LEXICOGRAPHICAL_COMPARE_H
10#define _LIBCPP___ALGORITHM_LEXICOGRAPHICAL_COMPARE_H
11
12#include <__algorithm/comp.h>
13#include <__algorithm/comp_ref_type.h>
14#include <__config>
15#include <__iterator/iterator_traits.h>
16
17#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18# pragma GCC system_header
19#endif
20
21_LIBCPP_BEGIN_NAMESPACE_STD
22
23template <class _Compare, class _InputIterator1, class _InputIterator2>
24_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool __lexicographical_compare(
25 _InputIterator1 __first1,
26 _InputIterator1 __last1,
27 _InputIterator2 __first2,
28 _InputIterator2 __last2,
29 _Compare __comp) {
30 for (; __first2 != __last2; ++__first1, (void)++__first2) {
31 if (__first1 == __last1 || __comp(*__first1, *__first2))
32 return true;
33 if (__comp(*__first2, *__first1))
34 return false;
35 }
36 return false;
37}
38
39template <class _InputIterator1, class _InputIterator2, class _Compare>
40_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool lexicographical_compare(
41 _InputIterator1 __first1,
42 _InputIterator1 __last1,
43 _InputIterator2 __first2,
44 _InputIterator2 __last2,
45 _Compare __comp) {
46 return std::__lexicographical_compare<__comp_ref_type<_Compare> >(__first1, __last1, __first2, __last2, __comp);
47}
48
49template <class _InputIterator1, class _InputIterator2>
50_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool lexicographical_compare(
51 _InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2) {
52 return std::lexicographical_compare(__first1, __last1, __first2, __last2, __less<>());
53}
54
55_LIBCPP_END_NAMESPACE_STD
56
57#endif // _LIBCPP___ALGORITHM_LEXICOGRAPHICAL_COMPARE_H
58