181ad6265SDimitry Andric // -*- C++ -*- 281ad6265SDimitry Andric //===----------------------------------------------------------------------===// 381ad6265SDimitry Andric // 481ad6265SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 581ad6265SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 681ad6265SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 781ad6265SDimitry Andric // 881ad6265SDimitry Andric //===----------------------------------------------------------------------===// 981ad6265SDimitry Andric 1081ad6265SDimitry Andric #ifndef _LIBCPP___ITERATOR_MERGEABLE_H 1181ad6265SDimitry Andric #define _LIBCPP___ITERATOR_MERGEABLE_H 1281ad6265SDimitry Andric 1381ad6265SDimitry Andric #include <__config> 1481ad6265SDimitry Andric #include <__functional/identity.h> 1581ad6265SDimitry Andric #include <__functional/ranges_operations.h> 1681ad6265SDimitry Andric #include <__iterator/concepts.h> 1781ad6265SDimitry Andric #include <__iterator/projected.h> 1881ad6265SDimitry Andric 1981ad6265SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 2081ad6265SDimitry Andric # pragma GCC system_header 2181ad6265SDimitry Andric #endif 2281ad6265SDimitry Andric 2381ad6265SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 2481ad6265SDimitry Andric 2506c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 2681ad6265SDimitry Andric 27*cb14a3feSDimitry Andric template <class _Input1, 28*cb14a3feSDimitry Andric class _Input2, 29*cb14a3feSDimitry Andric class _Output, 30*cb14a3feSDimitry Andric class _Comp = ranges::less, 31*cb14a3feSDimitry Andric class _Proj1 = identity, 32*cb14a3feSDimitry Andric class _Proj2 = identity> 3381ad6265SDimitry Andric concept mergeable = 34*cb14a3feSDimitry Andric input_iterator<_Input1> && input_iterator<_Input2> && weakly_incrementable<_Output> && 35*cb14a3feSDimitry Andric indirectly_copyable<_Input1, _Output> && indirectly_copyable<_Input2, _Output> && 3681ad6265SDimitry Andric indirect_strict_weak_order<_Comp, projected<_Input1, _Proj1>, projected<_Input2, _Proj2>>; 3781ad6265SDimitry Andric 3806c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20 3981ad6265SDimitry Andric 4081ad6265SDimitry Andric _LIBCPP_END_NAMESPACE_STD 4181ad6265SDimitry Andric 4281ad6265SDimitry Andric #endif // _LIBCPP___ITERATOR_MERGEABLE_H 43