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_NOTHROW_DESTRUCTIBLE_H 10#define _LIBCPP___TYPE_TRAITS_IS_NOTHROW_DESTRUCTIBLE_H 11 12#include <__config> 13#include <__type_traits/integral_constant.h> 14#include <__type_traits/is_destructible.h> 15#include <__type_traits/is_reference.h> 16#include <__type_traits/is_scalar.h> 17#include <__type_traits/remove_all_extents.h> 18#include <__utility/declval.h> 19#include <cstddef> 20 21#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 22# pragma GCC system_header 23#endif 24 25_LIBCPP_BEGIN_NAMESPACE_STD 26 27#if !defined(_LIBCPP_CXX03_LANG) 28 29template <bool, class _Tp> struct __libcpp_is_nothrow_destructible; 30 31template <class _Tp> 32struct __libcpp_is_nothrow_destructible<false, _Tp> 33 : public false_type 34{ 35}; 36 37template <class _Tp> 38struct __libcpp_is_nothrow_destructible<true, _Tp> 39 : public integral_constant<bool, noexcept(std::declval<_Tp>().~_Tp()) > 40{ 41}; 42 43template <class _Tp> 44struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible 45 : public __libcpp_is_nothrow_destructible<is_destructible<_Tp>::value, _Tp> 46{ 47}; 48 49template <class _Tp, size_t _Ns> 50struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp[_Ns]> 51 : public is_nothrow_destructible<_Tp> 52{ 53}; 54 55template <class _Tp> 56struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp&> 57 : public true_type 58{ 59}; 60 61template <class _Tp> 62struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp&&> 63 : public true_type 64{ 65}; 66 67#else 68 69template <class _Tp> struct __libcpp_nothrow_destructor 70 : public integral_constant<bool, is_scalar<_Tp>::value || 71 is_reference<_Tp>::value> {}; 72 73template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible 74 : public __libcpp_nothrow_destructor<__remove_all_extents_t<_Tp> > {}; 75 76template <class _Tp> 77struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp[]> 78 : public false_type {}; 79 80#endif 81 82#if _LIBCPP_STD_VER > 14 83template <class _Tp> 84inline constexpr bool is_nothrow_destructible_v = is_nothrow_destructible<_Tp>::value; 85#endif 86 87_LIBCPP_END_NAMESPACE_STD 88 89#endif // _LIBCPP___TYPE_TRAITS_IS_NOTHROW_DESTRUCTIBLE_H 90