| 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 |
|---|
| 10 | |
|---|
| 11 | // <functional> |
|---|
| 12 | |
|---|
| 13 | // class function<R(ArgTypes...)> |
|---|
| 14 | |
|---|
| 15 | // explicit operator bool() const |
|---|
| 16 | |
|---|
| 17 | #include <functional> |
|---|
| 18 | #include <cassert> |
|---|
| 19 | #include <type_traits> |
|---|
| 20 | |
|---|
| 21 | #include "test_macros.h" |
|---|
| 22 | |
|---|
| 23 | int g(int) {return 0;} |
|---|
| 24 | |
|---|
| 25 | int main(int, char**) |
|---|
| 26 | { |
|---|
| 27 | static_assert(std::is_constructible<bool, std::function<void()> >::value, "" ); |
|---|
| 28 | static_assert(!std::is_convertible<std::function<void()>, bool>::value, "" ); |
|---|
| 29 | |
|---|
| 30 | { |
|---|
| 31 | std::function<int(int)> f; |
|---|
| 32 | assert(!f); |
|---|
| 33 | f = g; |
|---|
| 34 | assert(f); |
|---|
| 35 | } |
|---|
| 36 | |
|---|
| 37 | return 0; |
|---|
| 38 | } |
|---|
| 39 | |
|---|
