1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
// Copyright (C) 2016-2024 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// { dg-do compile { target c++11 } }
#include <type_traits>
template<typename... T>
constexpr bool is_nt_invocable()
{ return std::__is_nothrow_invocable<T...>::value; }
template<typename R, typename... T>
struct ConvIsNothrow
{
using result_type = typename std::__invoke_result<T...>::type;
static void test(std::true_type, R) noexcept;
static void test(std::false_type, const result_type&);
static constexpr bool value
= noexcept(test(std::is_convertible<result_type, R>(),
std::declval<result_type>()));
};
template<typename... T>
struct ConvIsNothrow<void, T...> : std::true_type
{ };
template<typename R, typename... T>
constexpr bool is_nt_invocable_conv(std::true_type)
{
return ConvIsNothrow<R, T...>::value;
}
template<typename R, typename... T>
constexpr bool is_nt_invocable_conv(std::false_type) { return false; }
template<typename R, typename... T>
constexpr bool is_nt_invocable_r()
{
return is_nt_invocable_conv<R, T...>(std::__is_nothrow_invocable<T...>{});
}
#define IS_NT_INVOCABLE_DEFINED
#include "value.cc"
|
