File: invoke_r.temporary.verify.cpp

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (31 lines) | stat: -rw-r--r-- 1,091 bytes parent folder | download | duplicates (15) 
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
 
//===----------------------------------------------------------------------===//
//
// 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, c++20

// <functional>

// template<class R, class F, class... Args>
// constexpr R invoke_r(F&& f, Args&&... args)              // C++23
//     noexcept(is_nothrow_invocable_r_v<R, F, Args...>);
//
// Make sure that we diagnose when std::invoke_r is used with a return type that
// would yield a dangling reference to a temporary.

// TODO: We currently can't diagnose because we don't implement reference_converts_from_temporary.
// XFAIL: *

#include <functional>
#include <cassert>

#include "test_macros.h"

void f() {
    auto func = []() -> int { return 0; };
    std::invoke_r<int&&>(func); // expected-error {{Returning from invoke_r would bind a temporary object}}
}