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/add_const.h> 14 #include <__type_traits/integral_constant.h> 15 #include <__type_traits/is_destructible.h> 16 #include <__type_traits/is_reference.h> 17 #include <__type_traits/is_scalar.h> 18 #include <__type_traits/remove_all_extents.h> 19 #include <__utility/declval.h> 20 #include <cstddef> 21 22 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 23 # pragma GCC system_header 24 #endif 25 26 _LIBCPP_BEGIN_NAMESPACE_STD 27 28 #if !defined(_LIBCPP_CXX03_LANG) 29 30 template <bool, class _Tp> struct __libcpp_is_nothrow_destructible; 31 32 template <class _Tp> 33 struct __libcpp_is_nothrow_destructible<false, _Tp> 34 : public false_type 35 { 36 }; 37 38 template <class _Tp> 39 struct __libcpp_is_nothrow_destructible<true, _Tp> 40 : public integral_constant<bool, noexcept(declval<_Tp>().~_Tp()) > 41 { 42 }; 43 44 template <class _Tp> 45 struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible 46 : public __libcpp_is_nothrow_destructible<is_destructible<_Tp>::value, _Tp> 47 { 48 }; 49 50 template <class _Tp, size_t _Ns> 51 struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp[_Ns]> 52 : public is_nothrow_destructible<_Tp> 53 { 54 }; 55 56 template <class _Tp> 57 struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp&> 58 : public true_type 59 { 60 }; 61 62 template <class _Tp> 63 struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp&&> 64 : public true_type 65 { 66 }; 67 68 #else 69 70 template <class _Tp> struct __libcpp_nothrow_destructor 71 : public integral_constant<bool, is_scalar<_Tp>::value || 72 is_reference<_Tp>::value> {}; 73 74 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible 75 : public __libcpp_nothrow_destructor<typename remove_all_extents<_Tp>::type> {}; 76 77 template <class _Tp> 78 struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp[]> 79 : public false_type {}; 80 81 #endif 82 83 #if _LIBCPP_STD_VER > 14 84 template <class _Tp> 85 inline constexpr bool is_nothrow_destructible_v = is_nothrow_destructible<_Tp>::value; 86 #endif 87 88 _LIBCPP_END_NAMESPACE_STD 89 90 #endif // _LIBCPP___TYPE_TRAITS_IS_NOTHROW_DESTRUCTIBLE_H 91