43 lines · c
1// -*- C++ -*-2//===----------------------------------------------------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___ITERATOR_MERGEABLE_H11#define _LIBCPP___ITERATOR_MERGEABLE_H12 13#include <__config>14#include <__functional/identity.h>15#include <__functional/ranges_operations.h>16#include <__iterator/concepts.h>17#include <__iterator/projected.h>18 19#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)20# pragma GCC system_header21#endif22 23_LIBCPP_BEGIN_NAMESPACE_STD24 25#if _LIBCPP_STD_VER >= 2026 27template <class _Input1,28 class _Input2,29 class _Output,30 class _Comp = ranges::less,31 class _Proj1 = identity,32 class _Proj2 = identity>33concept mergeable =34 input_iterator<_Input1> && input_iterator<_Input2> && weakly_incrementable<_Output> &&35 indirectly_copyable<_Input1, _Output> && indirectly_copyable<_Input2, _Output> &&36 indirect_strict_weak_order<_Comp, projected<_Input1, _Proj1>, projected<_Input2, _Proj2>>;37 38#endif // _LIBCPP_STD_VER >= 2039 40_LIBCPP_END_NAMESPACE_STD41 42#endif // _LIBCPP___ITERATOR_MERGEABLE_H43