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
10// <type_traits>
11// UNSUPPORTED: c++03, c++11, c++14, c++17
12
13#include <type_traits>
14
15#include "test_macros.h"
16
17struct A {};
18struct B {
19public:
20 operator A() { return a; } A a;
21};
22
23class C { };
24class D {
25public:
26 operator C() noexcept { return c; } C c;
27};
28
29int main(int, char**) {
30 static_assert((std::is_nothrow_convertible<int, double>::value), "");
31 static_assert(!(std::is_nothrow_convertible<int, char*>::value), "");
32
33 static_assert(!(std::is_nothrow_convertible<A, B>::value), "");
34 static_assert((std::is_nothrow_convertible<D, C>::value), "");
35
36 static_assert((std::is_nothrow_convertible_v<int, double>), "");
37 static_assert(!(std::is_nothrow_convertible_v<int, char*>), "");
38
39 static_assert(!(std::is_nothrow_convertible_v<A, B>), "");
40 static_assert((std::is_nothrow_convertible_v<D, C>), "");
41
42 static_assert((std::is_nothrow_convertible_v<const void, void>), "");
43 static_assert((std::is_nothrow_convertible_v<volatile void, void>), "");
44 static_assert((std::is_nothrow_convertible_v<void, const void>), "");
45 static_assert((std::is_nothrow_convertible_v<void, volatile void>), "");
46
47 static_assert(!(std::is_nothrow_convertible_v<int[], double[]>), "");
48 static_assert(!(std::is_nothrow_convertible_v<int[], int[]>), "");
49 static_assert(!(std::is_nothrow_convertible_v<int[10], int[10]>), "");
50 static_assert(!(std::is_nothrow_convertible_v<int[10], double[10]>), "");
51 static_assert(!(std::is_nothrow_convertible_v<int[5], double[10]>), "");
52 static_assert(!(std::is_nothrow_convertible_v<int[10], A[10]>), "");
53
54 typedef void V();
55 typedef int I();
56 static_assert(!(std::is_nothrow_convertible_v<V, V>), "");
57 static_assert(!(std::is_nothrow_convertible_v<V, I>), "");
58
59 return 0;
60}
61

source code of libcxx/test/std/utilities/meta/meta.rel/is_nothrow_convertible.pass.cpp