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___TYPE_TRAITS_VOID_T_H 10 #define _LIBCPP___TYPE_TRAITS_VOID_T_H 11 12 #include <__config> 13 14 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 15 # pragma GCC system_header 16 #endif 17 18 _LIBCPP_BEGIN_NAMESPACE_STD 19 20 #if _LIBCPP_STD_VER >= 17 21 template <class...> using void_t = void; 22 #endif 23 24 template <class...> 25 using __void_t = void; 26 27 _LIBCPP_END_NAMESPACE_STD 28 29 #endif // _LIBCPP___TYPE_TRAITS_VOID_T_H 30