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145
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1 // { dg-do run }
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2 // { dg-output "main: returning(\n|\r\n|\r)" }
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3 // { dg-output "Destroyed coro1(\n|\r\n|\r)" }
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4 // { dg-output "Destroyed suspend_always_prt(\n|\r\n|\r)" }
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5 // { dg-output "Destroyed Promise(\n|\r\n|\r)" }
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6
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7 // Check that we still get the right DTORs run when we let a suspended coro
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8 // go out of scope.
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9
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10 #include "../coro.h"
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11
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12 struct coro1 {
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13 struct promise_type;
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14 using handle_type = coro::coroutine_handle<coro1::promise_type>;
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15 handle_type handle;
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16 coro1 () : handle(0) {}
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17 coro1 (handle_type _handle)
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18 : handle(_handle) {
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19 PRINT("Created coro1 object from handle");
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20 }
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21 coro1 (const coro1 &) = delete; // no copying
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22 coro1 (coro1 &&s) : handle(s.handle) {
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23 s.handle = nullptr;
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24 PRINT("coro1 mv ctor ");
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25 }
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26 coro1 &operator = (coro1 &&s) {
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27 handle = s.handle;
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28 s.handle = nullptr;
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29 PRINT("coro1 op= ");
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30 return *this;
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31 }
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32 ~coro1() {
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33 printf ("Destroyed coro1\n");
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34 if ( handle )
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35 handle.destroy();
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36 }
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37
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38 struct suspend_never_prt {
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39 bool await_ready() const noexcept { return true; }
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40 void await_suspend(handle_type) const noexcept { PRINT ("susp-never-susp");}
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41 void await_resume() const noexcept { PRINT ("susp-never-resume");}
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42 ~suspend_never_prt() {};
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43 };
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44
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45 struct suspend_always_prt {
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46 bool await_ready() const noexcept { return false; }
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47 void await_suspend(handle_type) const noexcept { PRINT ("susp-always-susp");}
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48 void await_resume() const noexcept { PRINT ("susp-always-resume");}
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49 ~suspend_always_prt() { printf ("Destroyed suspend_always_prt\n"); }
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50 };
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51
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52 struct promise_type {
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53 promise_type() { PRINT ("Created Promise"); }
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54 ~promise_type() { printf ("Destroyed Promise\n"); }
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55
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56 auto get_return_object () {
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57 PRINT ("get_return_object: handle from promise");
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58 return handle_type::from_promise (*this);
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59 }
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60 auto initial_suspend () {
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61 PRINT ("get initial_suspend (always)");
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62 return suspend_always_prt{};
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63 }
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64 auto final_suspend () {
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65 PRINT ("get final_suspend (always)");
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66 return suspend_always_prt{};
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67 }
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68 void return_void () {
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69 PRINT ("return_void ()");
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70 }
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71
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72 void unhandled_exception() { PRINT ("** unhandled exception"); }
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73 };
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74 };
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75
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76 struct coro1
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77 f () noexcept
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78 {
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79 PRINT ("coro1: about to return");
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80 co_return;
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81 }
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82
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83 int main ()
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84 {
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85 PRINT ("main: create coro1");
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86 struct coro1 x = f ();
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87 PRINT ("main: got coro1 - resuming");
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88 if (x.handle.done())
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89 {
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90 PRINT ("main: f() should be suspended, says it's done");
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91 abort();
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92 }
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93
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94 #if __has_builtin (__builtin_coro_suspended)
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95 if (! __builtin_coro_suspended(handle))
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96 {
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97 PRINT ("main: f() should be suspended, but says it isn't");
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98 abort();
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99 }
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100 #endif
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101
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102 /* We are suspended... so let everything out of scope and therefore
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103 destroy it. */
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104
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105 puts ("main: returning");
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106 return 0;
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107 }
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