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 #endif
19 
20 _LIBCPP_BEGIN_NAMESPACE_STD
21 
22 template <class _ForwardIterator1, class _ForwardIterator2>
23 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 void iter_swap(_ForwardIterator1 __a,
24                                                                               _ForwardIterator2 __b)
25     //                                  _NOEXCEPT_(_NOEXCEPT_(swap(*__a, *__b)))
26     _NOEXCEPT_(_NOEXCEPT_(swap(*declval<_ForwardIterator1>(), *declval<_ForwardIterator2>()))) {
27   swap(*__a, *__b);
28 }
29 
30 _LIBCPP_END_NAMESPACE_STD
31 
32 #endif // _LIBCPP___ALGORITHM_ITER_SWAP_H
33