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___TUPLE_IGNORE_H
10#define _LIBCPP___TUPLE_IGNORE_H
11
12#include <__config>
13
14#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
15# pragma GCC system_header
16#endif
17
18#ifndef _LIBCPP_CXX03_LANG
19
20_LIBCPP_BEGIN_NAMESPACE_STD
21
22struct __ignore_type {
23 template <class _Tp>
24 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const __ignore_type& operator=(const _Tp&) const noexcept {
25 return *this;
26 }
27};
28
29# if _LIBCPP_STD_VER >= 17
30inline constexpr __ignore_type ignore;
31# else
32constexpr __ignore_type ignore;
33# endif
34
35_LIBCPP_END_NAMESPACE_STD
36
37#endif // _LIBCPP_CXX03_LANG
38
39#endif // _LIBCPP___TUPLE_IGNORE_H
40