ast-experimental
Last change
on this file since 8463136 was
571bf75,
checked in by tdelisle <tdelisle@…>, 5 years ago
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Clean existing coroutines using std::experimental::suspend_never and fixed Format coroutines to use RAII
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-
Property mode set to
100644
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File size:
1.4 KB
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Rev | Line | |
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[571bf75] | 1 | #include <iostream> |
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| 2 | #include <experimental/coroutine> |
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[9cb4fc8] | 3 | |
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| 4 | struct counter_cor { |
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| 5 | struct promise_type { |
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| 6 | counter_cor get_return_object() { |
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| 7 | return counter_cor(std::experimental::coroutine_handle<promise_type>::from_promise(*this)); |
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| 8 | } |
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| 9 | |
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[571bf75] | 10 | auto initial_suspend() { return std::experimental::suspend_never(); } |
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| 11 | auto final_suspend() { return std::experimental::suspend_never(); } |
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[9cb4fc8] | 12 | |
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| 13 | void return_void() {} |
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| 14 | |
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| 15 | void unhandled_exception() {} |
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| 16 | }; |
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| 17 | |
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| 18 | std::experimental::coroutine_handle<promise_type> _coroutine = nullptr; |
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| 19 | |
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| 20 | explicit counter_cor(std::experimental::coroutine_handle<promise_type> coroutine) |
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| 21 | : _coroutine(coroutine) |
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| 22 | {} |
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| 23 | |
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| 24 | ~counter_cor() { |
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| 25 | if(_coroutine) { _coroutine.destroy(); } |
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| 26 | } |
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| 27 | |
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| 28 | counter_cor() = default; |
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| 29 | counter_cor(counter_cor const &) = delete; |
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| 30 | counter_cor& operator=(counter_cor const &) = delete; |
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| 31 | |
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| 32 | counter_cor(counter_cor&& other) { |
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| 33 | std::swap(_coroutine, other._coroutine); |
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| 34 | } |
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| 35 | |
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| 36 | counter_cor& operator=(counter_cor&& other) { |
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| 37 | if(&other != this) { |
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| 38 | _coroutine = other._coroutine; |
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| 39 | other._coroutine = nullptr; |
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| 40 | } |
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| 41 | return *this; |
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| 42 | } |
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| 43 | |
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| 44 | void resume() { _coroutine.resume(); } |
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| 45 | }; |
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| 46 | |
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| 47 | counter_cor counter() { |
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| 48 | std::cout << "Counter: called\n"; |
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| 49 | for(unsigned i = 1;; i++) { |
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[571bf75] | 50 | co_await std::experimental::suspend_always{}; |
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[9cb4fc8] | 51 | std::cout << "Counter: Resumed " << i << " time(s)\n"; |
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| 52 | } |
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| 53 | } |
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| 54 | |
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| 55 | int main() { |
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| 56 | std::cout << "Main: calling counter\n"; |
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| 57 | auto c = counter(); |
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| 58 | std::cout << "Main: resumes\n"; |
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| 59 | c.resume(); |
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| 60 | c.resume(); |
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| 61 | std::cout << "Main: done\n"; |
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| 62 | } |
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