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_IS_IMPLICIT_LIFETIME_H 10 #define _LIBCPP___TYPE_TRAITS_IS_IMPLICIT_LIFETIME_H 11 12 #include <__config> 13 #include <__type_traits/integral_constant.h> 14 15 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 16 # pragma GCC system_header 17 #endif 18 19 _LIBCPP_BEGIN_NAMESPACE_STD 20 21 #if _LIBCPP_STD_VER >= 23 22 # if __has_builtin(__builtin_is_implicit_lifetime) 23 24 template <class _Tp> 25 struct _LIBCPP_NO_SPECIALIZATIONS is_implicit_lifetime : bool_constant<__builtin_is_implicit_lifetime(_Tp)> {}; 26 27 template <class _Tp> 28 _LIBCPP_NO_SPECIALIZATIONS inline constexpr bool is_implicit_lifetime_v = __builtin_is_implicit_lifetime(_Tp); 29 30 # endif 31 #endif 32 33 _LIBCPP_END_NAMESPACE_STD 34 35 #endif // _LIBCPP___TYPE_TRAITS_IS_IMPLICIT_LIFETIME_H 36