| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___TYPE_TRAITS_IS_NOTHROW_CONVERTIBLE_H |
| #define _LIBCPP___TYPE_TRAITS_IS_NOTHROW_CONVERTIBLE_H |
| |
| #include <__config> |
| #include <__type_traits/conjunction.h> |
| #include <__type_traits/disjunction.h> |
| #include <__type_traits/integral_constant.h> |
| #include <__type_traits/is_convertible.h> |
| #include <__type_traits/is_void.h> |
| #include <__type_traits/lazy.h> |
| #include <__utility/declval.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| #if _LIBCPP_STD_VER > 17 |
| |
| template <typename _Tp> |
| static void __test_noexcept(_Tp) noexcept; |
| |
| template<typename _Fm, typename _To> |
| static bool_constant<noexcept(_VSTD::__test_noexcept<_To>(declval<_Fm>()))> |
| __is_nothrow_convertible_test(); |
| |
| template <typename _Fm, typename _To> |
| struct __is_nothrow_convertible_helper: decltype(__is_nothrow_convertible_test<_Fm, _To>()) |
| { }; |
| |
| template <typename _Fm, typename _To> |
| struct is_nothrow_convertible : _Or< |
| _And<is_void<_To>, is_void<_Fm>>, |
| _Lazy<_And, is_convertible<_Fm, _To>, __is_nothrow_convertible_helper<_Fm, _To>> |
| >::type { }; |
| |
| template <typename _Fm, typename _To> |
| inline constexpr bool is_nothrow_convertible_v = is_nothrow_convertible<_Fm, _To>::value; |
| |
| #endif // _LIBCPP_STD_VER > 17 |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___TYPE_TRAITS_IS_NOTHROW_CONVERTIBLE_H |
