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 22 struct __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 30 inline constexpr __ignore_type ignore; 31 # else 32 constexpr __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