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_IS_CONSTRUCTIBLE_H 10 #define _LIBCPP___TYPE_IS_CONSTRUCTIBLE_H 11 12 #include <__config> 13 #include <__type_traits/add_lvalue_reference.h> 14 #include <__type_traits/add_rvalue_reference.h> 15 #include <__type_traits/integral_constant.h> 16 17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18 # pragma GCC system_header 19 #endif 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 template <class _Tp, class... _Args> 24 struct _LIBCPP_TEMPLATE_VIS is_constructible : public integral_constant<bool, __is_constructible(_Tp, _Args...)> {}; 25 26 #if _LIBCPP_STD_VER >= 17 27 template <class _Tp, class... _Args> 28 inline constexpr bool is_constructible_v = __is_constructible(_Tp, _Args...); 29 #endif 30 31 template <class _Tp> 32 struct _LIBCPP_TEMPLATE_VIS is_copy_constructible 33 : public integral_constant<bool, __is_constructible(_Tp, __add_lvalue_reference_t<const _Tp>)> {}; 34 35 #if _LIBCPP_STD_VER >= 17 36 template <class _Tp> 37 inline constexpr bool is_copy_constructible_v = is_copy_constructible<_Tp>::value; 38 #endif 39 40 template <class _Tp> 41 struct _LIBCPP_TEMPLATE_VIS is_move_constructible 42 : public integral_constant<bool, __is_constructible(_Tp, __add_rvalue_reference_t<_Tp>)> {}; 43 44 #if _LIBCPP_STD_VER >= 17 45 template <class _Tp> 46 inline constexpr bool is_move_constructible_v = is_move_constructible<_Tp>::value; 47 #endif 48 49 template <class _Tp> 50 struct _LIBCPP_TEMPLATE_VIS is_default_constructible : public integral_constant<bool, __is_constructible(_Tp)> {}; 51 52 #if _LIBCPP_STD_VER >= 17 53 template <class _Tp> 54 inline constexpr bool is_default_constructible_v = __is_constructible(_Tp); 55 #endif 56 57 _LIBCPP_END_NAMESPACE_STD 58 59 #endif // _LIBCPP___TYPE_IS_CONSTRUCTIBLE_H 60