1 //  { dg-do run }
2 
3 // Basic functionality check, co_return.
4 // Here we check the case that initial suspend is "always".
5 
6 #include "../coro.h"
7 
8 struct coro1 {
9   struct promise_type;
10   using handle_type = coro::coroutine_handle<coro1::promise_type>;
11   handle_type handle;
coro1coro112   coro1 () : handle(0) {}
coro1coro113   coro1 (handle_type _handle)
14     : handle(_handle) {
15         PRINT("Created coro1 object from handle");
16   }
17   coro1 (const coro1 &) = delete; // no copying
coro1coro118   coro1 (coro1 &&s) : handle(s.handle) {
19 	s.handle = nullptr;
20 	PRINT("coro1 mv ctor ");
21   }
22   coro1 &operator = (coro1 &&s) {
23 	handle = s.handle;
24 	s.handle = nullptr;
25 	PRINT("coro1 op=  ");
26 	return *this;
27   }
~coro1coro128   ~coro1() {
29         PRINT("Destroyed coro1");
30         if ( handle )
31           handle.destroy();
32   }
33 
34   struct suspend_never_prt {
await_readycoro1::suspend_never_prt35   bool await_ready() const noexcept { return true; }
await_suspendcoro1::suspend_never_prt36   void await_suspend(handle_type) const noexcept { PRINT ("susp-never-susp");}
await_resumecoro1::suspend_never_prt37   void await_resume() const noexcept { PRINT ("susp-never-resume");}
~suspend_never_prtcoro1::suspend_never_prt38   ~suspend_never_prt() {};
39   };
40 
41   struct  suspend_always_prt {
await_readycoro1::suspend_always_prt42   bool await_ready() const noexcept { return false; }
await_suspendcoro1::suspend_always_prt43   void await_suspend(handle_type) const noexcept { PRINT ("susp-always-susp");}
await_resumecoro1::suspend_always_prt44   void await_resume() const noexcept { PRINT ("susp-always-resume");}
45   };
46 
47 
48   struct promise_type {
promise_typecoro1::promise_type49   promise_type() {  PRINT ("Created Promise"); }
~promise_typecoro1::promise_type50   ~promise_type() { PRINT ("Destroyed Promise"); }
51 
get_return_objectcoro1::promise_type52   coro1 get_return_object () {
53     PRINT ("get_return_object: from handle from promise");
54     return coro1 (handle_type::from_promise (*this));
55   }
initial_suspendcoro1::promise_type56   auto initial_suspend () {
57     PRINT ("get initial_suspend (always)");
58     return suspend_always_prt{};
59   }
final_suspendcoro1::promise_type60   auto final_suspend () noexcept {
61     PRINT ("get final_suspend (always)");
62     return suspend_always_prt{};
63   }
return_voidcoro1::promise_type64   void return_void () {
65     PRINT ("return_void ()");
66   }
unhandled_exceptioncoro1::promise_type67   void unhandled_exception() { PRINT ("** unhandled exception"); }
68   };
69 };
70 
71 struct coro1
f()72 f () noexcept
73 {
74   PRINT ("coro1: about to return");
75   co_return;
76 }
77 
main()78 int main ()
79 {
80   PRINT ("main: create coro1");
81   struct coro1 x = f ();
82   PRINT ("main: got coro1 - resuming");
83   if (x.handle.done())
84     abort();
85   x.handle.resume();
86   PRINT ("main: after resume");
87   if (!x.handle.done())
88     {
89       PRINT ("main: apparently not done...");
90       abort ();
91     }
92   PRINT ("main: returning");
93   return 0;
94 }
95