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 23 template <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 39 template <class _InputIterator1, class _InputIterator2, class _Compare> 40 _LIBCPP_NODISCARD_EXT 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 49 template <class _InputIterator1, class _InputIterator2> 50 _LIBCPP_NODISCARD_EXT 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