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comparison gcc/testsuite/g++.dg/coroutines/torture/co-ret-01-void-return-is-suspend.C @ 145:1830386684a0

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gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
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131:84e7813d76e9 145:1830386684a0
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;
12 coro1 () : handle(0) {}
13 coro1 (handle_type _handle)
14 : handle(_handle) {
15 PRINT("Created coro1 object from handle");
16 }
17 coro1 (const coro1 &) = delete; // no copying
18 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 }
28 ~coro1() {
29 PRINT("Destroyed coro1");
30 if ( handle )
31 handle.destroy();
32 }
33
34 struct suspend_never_prt {
35 bool await_ready() const noexcept { return true; }
36 void await_suspend(handle_type) const noexcept { PRINT ("susp-never-susp");}
37 void await_resume() const noexcept { PRINT ("susp-never-resume");}
38 ~suspend_never_prt() {};
39 };
40
41 struct suspend_always_prt {
42 bool await_ready() const noexcept { return false; }
43 void await_suspend(handle_type) const noexcept { PRINT ("susp-always-susp");}
44 void await_resume() const noexcept { PRINT ("susp-always-resume");}
45 };
46
47
48 struct promise_type {
49 promise_type() { PRINT ("Created Promise"); }
50 ~promise_type() { PRINT ("Destroyed Promise"); }
51
52 coro1 get_return_object () {
53 PRINT ("get_return_object: from handle from promise");
54 return coro1 (handle_type::from_promise (*this));
55 }
56 auto initial_suspend () {
57 PRINT ("get initial_suspend (always)");
58 return suspend_always_prt{};
59 }
60 auto final_suspend () {
61 PRINT ("get final_suspend (always)");
62 return suspend_always_prt{};
63 }
64 void return_void () {
65 PRINT ("return_void ()");
66 }
67 void unhandled_exception() { PRINT ("** unhandled exception"); }
68 };
69 };
70
71 struct coro1
72 f () noexcept
73 {
74 PRINT ("coro1: about to return");
75 co_return;
76 }
77
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 }