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_STANDARD_LAYOUT_H 10 #define _LIBCPP___TYPE_TRAITS_IS_STANDARD_LAYOUT_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 template <class _Tp> 22 struct _LIBCPP_TEMPLATE_VIS _LIBCPP_NO_SPECIALIZATIONS is_standard_layout 23 : public integral_constant<bool, __is_standard_layout(_Tp)> {}; 24 25 #if _LIBCPP_STD_VER >= 17 26 template <class _Tp> 27 _LIBCPP_NO_SPECIALIZATIONS inline constexpr bool is_standard_layout_v = __is_standard_layout(_Tp); 28 #endif 29 30 _LIBCPP_END_NAMESPACE_STD 31 32 #endif // _LIBCPP___TYPE_TRAITS_IS_STANDARD_LAYOUT_H 33