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_ITER_SWAP_H 10 #define _LIBCPP___ALGORITHM_ITER_SWAP_H 11 12 #include <__config> 13 #include <__utility/declval.h> 14 #include <__utility/swap.h> 15 16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17 # pragma GCC system_header 18 # pragma clang include_instead(<algorithm>) 19 #endif 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 template <class _ForwardIterator1, class _ForwardIterator2> 24 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 void iter_swap(_ForwardIterator1 __a, 25 _ForwardIterator2 __b) 26 // _NOEXCEPT_(_NOEXCEPT_(swap(*__a, *__b))) 27 _NOEXCEPT_(_NOEXCEPT_(swap(*declval<_ForwardIterator1>(), *declval<_ForwardIterator2>()))) { 28 swap(*__a, *__b); 29 } 30 31 _LIBCPP_END_NAMESPACE_STD 32 33 #endif // _LIBCPP___ALGORITHM_ITER_SWAP_H 34