| 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 | // <functional> |
| 10 | |
| 11 | // reference_wrapper |
| 12 | |
| 13 | // template <class... ArgTypes> |
| 14 | // requires Callable<T, ArgTypes&&...> |
| 15 | // Callable<T, ArgTypes&&...>::result_type |
| 16 | // operator()(ArgTypes&&... args) const; |
| 17 | |
| 18 | #include <functional> |
| 19 | #include <cassert> |
| 20 | |
| 21 | #include "test_macros.h" |
| 22 | |
| 23 | // 0 args, return void |
| 24 | |
| 25 | int count = 0; |
| 26 | |
| 27 | void f_void_0() |
| 28 | { |
| 29 | ++count; |
| 30 | } |
| 31 | |
| 32 | struct A_void_0 |
| 33 | { |
| 34 | void operator()() {++count;} |
| 35 | }; |
| 36 | |
| 37 | void |
| 38 | test_void_0() |
| 39 | { |
| 40 | int save_count = count; |
| 41 | // function |
| 42 | { |
| 43 | std::reference_wrapper<void ()> r1(f_void_0); |
| 44 | r1(); |
| 45 | assert(count == save_count+1); |
| 46 | save_count = count; |
| 47 | } |
| 48 | // function pointer |
| 49 | { |
| 50 | void (*fp)() = f_void_0; |
| 51 | std::reference_wrapper<void (*)()> r1(fp); |
| 52 | r1(); |
| 53 | assert(count == save_count+1); |
| 54 | save_count = count; |
| 55 | } |
| 56 | // functor |
| 57 | { |
| 58 | A_void_0 a0; |
| 59 | std::reference_wrapper<A_void_0> r1(a0); |
| 60 | r1(); |
| 61 | assert(count == save_count+1); |
| 62 | save_count = count; |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | int main(int, char**) |
| 67 | { |
| 68 | test_void_0(); |
| 69 | |
| 70 | return 0; |
| 71 | } |
| 72 |