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
|
//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <functional>
// reference_wrapper
// template <class... ArgTypes>
// requires Callable<T, ArgTypes&&...>
// Callable<T, ArgTypes&&...>::result_type
// operator()(ArgTypes&&... args) const;
#include <functional>
#include <cassert>
// member data pointer: cv qualifiers should transfer from argument to return type
struct A_int_1
{
A_int_1() : data_(5) {}
int data_;
};
void
test_int_1()
{
// member data pointer
{
int A_int_1::*fp = &A_int_1::data_;
std::reference_wrapper<int A_int_1::*> r1(fp);
A_int_1 a;
assert(r1(a) == 5);
r1(a) = 6;
assert(r1(a) == 6);
const A_int_1* ap = &a;
assert(r1(ap) == 6);
r1(ap) = 7;
assert(r1(ap) == 7);
}
}
int main(int, char**)
{
test_int_1();
return 0;
}
|
