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comparison gcc/testsuite/g++.dg/coroutines/co-await-void_type.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-additional-options "-std=c++17 -fsyntax-only -w" }
2
3 #include <coroutine>
4
5 class resumable {
6 public:
7 struct promise_type;
8 using coro_handle = std::coroutine_handle<promise_type>;
9 resumable(coro_handle handle) : handle_(handle) {}
10 resumable(resumable&) = delete;
11 resumable(resumable&&) = delete;
12 bool resume() {
13 if (not handle_.done())
14 handle_.resume();
15 return not handle_.done();
16 }
17 int recent_val();
18 ~resumable() { handle_.destroy(); }
19 private:
20 coro_handle handle_;
21 };
22
23 struct resumable::promise_type {
24 int value_;
25
26 using coro_handle = std::coroutine_handle<promise_type>;
27 auto get_return_object() {
28 return coro_handle::from_promise(*this);
29 }
30 auto initial_suspend() { return std::suspend_always(); }
31 auto final_suspend() { return std::suspend_always(); }
32 void yield_value(int v) { value_ = v; }
33 void unhandled_exception() {}
34 };
35
36 int resumable::recent_val(){return handle_.promise().value_;}
37
38 resumable foo(int n){
39 int x = 1;
40 co_await std::suspend_always();
41 int y = 2;
42 co_yield n + x + y; // { dg-error "awaitable type 'void' is not a structure" }
43 }
44