arm-ehcleanup-dtorsenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprpthread-emulationqualifiedEnum
Last change
on this file since 13b1b1d was
13b1b1d,
checked in by tdelisle <tdelisle@…>, 4 years ago
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C++ Format coroutine now "properly" destroys itself
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-
Property mode set to
100644
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File size:
1.9 KB
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1 | |
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2 | #include "base.hpp" |
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3 | |
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4 | struct fmt_cor { |
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5 | struct promise_type { |
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6 | char _value; |
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7 | struct locals { |
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8 | int g, b; |
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9 | } * _l; |
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10 | |
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11 | fmt_cor get_return_object() { |
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12 | return fmt_cor(std::experimental::coroutine_handle<promise_type>::from_promise(*this)); |
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13 | } |
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14 | |
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15 | auto initial_suspend() { return suspend_never(); } |
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16 | auto final_suspend() { return suspend_always(); } |
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17 | |
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18 | void return_void() {} |
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19 | void unhandled_exception() {} |
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20 | |
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21 | auto yield_value(locals & l) { |
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22 | _l = &l; |
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23 | return suspend_never(); |
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24 | } |
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25 | }; |
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26 | |
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27 | struct get { |
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28 | promise_type * _promise = nullptr; |
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29 | |
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30 | bool await_ready() noexcept { |
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31 | return false; |
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32 | } |
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33 | |
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34 | void await_suspend(std::experimental::coroutine_handle<promise_type> _coroutine) noexcept { |
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35 | _promise = &_coroutine.promise(); |
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36 | } |
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37 | char await_resume() noexcept { |
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38 | assert(_promise); |
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39 | return _promise->_value; |
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40 | } |
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41 | }; |
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42 | |
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43 | std::experimental::coroutine_handle<promise_type> _coroutine = nullptr; |
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44 | |
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45 | explicit fmt_cor(std::experimental::coroutine_handle<promise_type> coroutine) |
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46 | : _coroutine(coroutine) |
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47 | {} |
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48 | |
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49 | ~fmt_cor() { |
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50 | if(_coroutine) { |
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51 | _coroutine.destroy(); |
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52 | if (_coroutine.promise()._l->g != 0 | _coroutine.promise()._l->b != 0) { |
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53 | std::cout << "\n"; |
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54 | } |
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55 | } |
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56 | } |
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57 | |
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58 | fmt_cor() = default; |
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59 | fmt_cor(fmt_cor const &) = delete; |
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60 | fmt_cor& operator=(fmt_cor const &) = delete; |
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61 | |
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62 | fmt_cor(fmt_cor&& other) { |
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63 | std::swap(_coroutine, other._coroutine); |
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64 | } |
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65 | |
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66 | fmt_cor& operator=(fmt_cor&& other) { |
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67 | if(&other != this) { |
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68 | _coroutine = other._coroutine; |
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69 | other._coroutine = nullptr; |
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70 | } |
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71 | return *this; |
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72 | } |
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73 | |
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74 | void send(char a) { |
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75 | _coroutine.promise()._value = a; |
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76 | _coroutine.resume(); |
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77 | } |
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78 | }; |
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79 | |
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80 | fmt_cor Fmt() { |
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81 | fmt_cor::promise_type::locals l; |
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82 | co_yield l; |
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83 | for(;;) { |
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84 | for(l.g = 0; l.g < 5; l.g++) { |
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85 | for(l.b = 0; l.b < 4; l.b++) { |
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86 | std::cout << co_await fmt_cor::get(); |
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87 | } |
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88 | std::cout << " "; |
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89 | } |
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90 | std::cout << std::endl; |
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91 | } |
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92 | } |
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93 | |
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94 | int main() { |
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95 | auto fmt = Fmt(); |
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96 | for(int i = 0; i < 41; i++) { |
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97 | fmt.send('a'); |
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98 | } |
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99 | } |
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