File: cref.incomplete.pass.cpp

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (45 lines) | stat: -rw-r--r-- 946 bytes parent folder | download | duplicates (21) 
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
 
//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: c++03, c++11, c++14, c++17

// <functional>
//
// reference_wrapper
//
// template <ObjectType T> reference_wrapper<const T> cref(const T& t);
//
//  where T is an incomplete type (since C++20)

#include <functional>
#include <cassert>

#include "test_macros.h"


struct Foo;

Foo& get_foo();

void test() {
    Foo const& foo = get_foo();
    std::reference_wrapper<Foo const> ref = std::cref(foo);
    assert(&ref.get() == &foo);
}

struct Foo { };

Foo& get_foo() {
    static Foo foo;
    return foo;
}

int main(int, char**) {
    test();
    return 0;
}