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_COPY_CONSTRUCTIBLE_H
10 #define _LIBCPP___TYPE_TRAITS_IS_NOTHROW_COPY_CONSTRUCTIBLE_H
11 
12 #include <__config>
13 #include <__type_traits/add_const.h>
14 #include <__type_traits/add_lvalue_reference.h>
15 #include <__type_traits/integral_constant.h>
16 #include <__type_traits/is_nothrow_constructible.h>
17 
18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
19 #  pragma GCC system_header
20 #endif
21 
22 _LIBCPP_BEGIN_NAMESPACE_STD
23 
24 // TODO: remove this implementation once https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106611 is fixed
25 #ifdef _LIBCPP_COMPILER_GCC
26 
27 template <class _Tp>
28 struct _LIBCPP_TEMPLATE_VIS is_nothrow_copy_constructible
29     : public is_nothrow_constructible<_Tp, __add_lvalue_reference_t<typename add_const<_Tp>::type> > {};
30 
31 #else // _LIBCPP_COMPILER_GCC
32 
33 template <class _Tp>
34 struct _LIBCPP_TEMPLATE_VIS is_nothrow_copy_constructible
35     : public integral_constant<
36           bool,
37           __is_nothrow_constructible(_Tp, typename add_lvalue_reference<typename add_const<_Tp>::type>::type)> {};
38 
39 #endif // _LIBCPP_COMPILER_GCC
40 
41 #if _LIBCPP_STD_VER >= 17
42 template <class _Tp>
43 inline constexpr bool is_nothrow_copy_constructible_v = is_nothrow_copy_constructible<_Tp>::value;
44 #endif
45 
46 _LIBCPP_END_NAMESPACE_STD
47 
48 #endif // _LIBCPP___TYPE_TRAITS_IS_NOTHROW_COPY_CONSTRUCTIBLE_H
49