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// UNSUPPORTED: c++03 && !stdlib=libc++
10
11// <utility>
12
13// template <class T>
14// typename conditional
15// <
16// !is_nothrow_move_constructible<T>::value && is_copy_constructible<T>::value,
17// const T&,
18// T&&
19// >::type
20// move_if_noexcept(T& x);
21
22#include <type_traits>
23#include <utility>
24
25#include "test_macros.h"
26
27class A
28{
29 A(const A&);
30 A& operator=(const A&);
31public:
32
33 A() {}
34 A(A&&) {}
35};
36
37struct legacy
38{
39 legacy() {}
40 legacy(const legacy&);
41};
42
43int main(int, char**)
44{
45 int i = 0;
46 const int ci = 0;
47
48 legacy l;
49 A a;
50 const A ca;
51
52 static_assert((std::is_same<decltype(std::move_if_noexcept(x&: i)), int&&>::value), "");
53 static_assert((std::is_same<decltype(std::move_if_noexcept(x: ci)), const int&&>::value), "");
54 static_assert((std::is_same<decltype(std::move_if_noexcept(x&: a)), A&&>::value), "");
55 static_assert((std::is_same<decltype(std::move_if_noexcept(x: ca)), const A&&>::value), "");
56 static_assert((std::is_same<decltype(std::move_if_noexcept(x&: l)), const legacy&>::value), "");
57
58#if TEST_STD_VER > 11
59 constexpr int i1 = 23;
60 constexpr int i2 = std::move_if_noexcept(i1);
61 static_assert(i2 == 23, "" );
62#endif
63
64
65 return 0;
66}
67

source code of libcxx/test/std/utilities/utility/forward/move_if_noexcept.pass.cpp