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145
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1 // { dg-do run }
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2
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3 // Basic functionality check, co_return.
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4 // Here we check the case that initial suspend is "always".
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5
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6 #include "../coro.h"
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7
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8 struct coro1 {
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9 struct promise_type;
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10 using handle_type = coro::coroutine_handle<coro1::promise_type>;
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11 handle_type handle;
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12 coro1 () : handle(0) {}
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13 coro1 (handle_type _handle)
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14 : handle(_handle) {
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15 PRINT("Created coro1 object from handle");
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16 }
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17 coro1 (const coro1 &) = delete; // no copying
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18 coro1 (coro1 &&s) : handle(s.handle) {
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19 s.handle = nullptr;
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20 PRINT("coro1 mv ctor ");
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21 }
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22 coro1 &operator = (coro1 &&s) {
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23 handle = s.handle;
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24 s.handle = nullptr;
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25 PRINT("coro1 op= ");
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26 return *this;
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27 }
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28 ~coro1() {
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29 PRINT("Destroyed coro1");
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30 if ( handle )
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31 handle.destroy();
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32 }
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33
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34 struct suspend_never_prt {
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35 bool await_ready() const noexcept { return true; }
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36 void await_suspend(handle_type) const noexcept { PRINT ("susp-never-susp");}
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37 void await_resume() const noexcept { PRINT ("susp-never-resume");}
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38 ~suspend_never_prt() {};
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39 };
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40
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41 struct suspend_always_prt {
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42 bool await_ready() const noexcept { return false; }
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43 void await_suspend(handle_type) const noexcept { PRINT ("susp-always-susp");}
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44 void await_resume() const noexcept { PRINT ("susp-always-resume");}
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45 };
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46
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47
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48 struct promise_type {
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49 promise_type() { PRINT ("Created Promise"); }
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50 ~promise_type() { PRINT ("Destroyed Promise"); }
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51
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52 coro1 get_return_object () {
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53 PRINT ("get_return_object: from handle from promise");
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54 return coro1 (handle_type::from_promise (*this));
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55 }
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56 auto initial_suspend () {
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57 PRINT ("get initial_suspend (always)");
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58 return suspend_always_prt{};
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59 }
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60 auto final_suspend () {
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61 PRINT ("get final_suspend (always)");
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62 return suspend_always_prt{};
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63 }
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64 void return_void () {
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65 PRINT ("return_void ()");
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66 }
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67 void unhandled_exception() { PRINT ("** unhandled exception"); }
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68 };
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69 };
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70
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71 struct coro1
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72 f () noexcept
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73 {
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74 PRINT ("coro1: about to return");
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75 co_return;
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76 }
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77
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78 int main ()
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79 {
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80 PRINT ("main: create coro1");
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81 struct coro1 x = f ();
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82 PRINT ("main: got coro1 - resuming");
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83 if (x.handle.done())
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84 abort();
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85 x.handle.resume();
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86 PRINT ("main: after resume");
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87 if (!x.handle.done())
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88 {
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89 PRINT ("main: apparently not done...");
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90 abort ();
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91 }
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92 PRINT ("main: returning");
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93 return 0;
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94 }
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