File: optional_nullopt_t.fail.cpp

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-6~deb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,418,812 kB
  • sloc: cpp: 5,290,827; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,900; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,892; xml: 953; cs: 573; fortran: 539
file content (30 lines) | stat: -rw-r--r-- 1,060 bytes parent folder | download | duplicates (11) 
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
 
//===----------------------------------------------------------------------===//
//
// 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
// <optional>

// A program that necessitates the instantiation of template optional for
// (possibly cv-qualified) nullopt_t is ill-formed.

#include <optional>

int main(int, char**)
{
    using std::optional;
    using std::nullopt_t;
    using std::nullopt;

    optional<nullopt_t> opt; // expected-note 1 {{requested here}}
    optional<const nullopt_t> opt1; // expected-note 1 {{requested here}}
    optional<nullopt_t &> opt2; // expected-note 1 {{requested here}}
    optional<nullopt_t &&> opt3; // expected-note 1 {{requested here}}
    // expected-error@optional:* 4 {{instantiation of optional with nullopt_t is ill-formed}}

  return 0;
}