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_CONSTEXPR_AFTER_CXX17 bool 25 __lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1, 26 _InputIterator2 __first2, _InputIterator2 __last2, _Compare __comp) 27 { 28 for (; __first2 != __last2; ++__first1, (void) ++__first2) 29 { 30 if (__first1 == __last1 || __comp(*__first1, *__first2)) 31 return true; 32 if (__comp(*__first2, *__first1)) 33 return false; 34 } 35 return false; 36 } 37 38 template <class _InputIterator1, class _InputIterator2, class _Compare> 39 _LIBCPP_NODISCARD_EXT inline 40 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 41 bool 42 lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1, 43 _InputIterator2 __first2, _InputIterator2 __last2, _Compare __comp) 44 { 45 typedef typename __comp_ref_type<_Compare>::type _Comp_ref; 46 return _VSTD::__lexicographical_compare<_Comp_ref>(__first1, __last1, __first2, __last2, __comp); 47 } 48 49 template <class _InputIterator1, class _InputIterator2> 50 _LIBCPP_NODISCARD_EXT inline 51 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 52 bool 53 lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1, 54 _InputIterator2 __first2, _InputIterator2 __last2) 55 { 56 return _VSTD::lexicographical_compare(__first1, __last1, __first2, __last2, 57 __less<typename iterator_traits<_InputIterator1>::value_type, 58 typename iterator_traits<_InputIterator2>::value_type>()); 59 } 60 61 _LIBCPP_END_NAMESPACE_STD 62 63 #endif // _LIBCPP___ALGORITHM_LEXICOGRAPHICAL_COMPARE_H 64