blob: 370068fb5cb16d47db31e0577dd5a3e7557ae316 [file] [log] [blame]
// { dg-additional-options "-std=c++17 -fsyntax-only -w" }
#include <coroutine>
class resumable {
public:
struct promise_type;
using coro_handle = std::coroutine_handle<promise_type>;
resumable(coro_handle handle) : handle_(handle) {}
resumable(resumable&) = delete;
resumable(resumable&&) = delete;
bool resume() {
if (not handle_.done())
handle_.resume();
return not handle_.done();
}
int recent_val();
~resumable() { handle_.destroy(); }
private:
coro_handle handle_;
};
struct resumable::promise_type {
int value_;
using coro_handle = std::coroutine_handle<promise_type>;
auto get_return_object() {
return coro_handle::from_promise(*this);
}
auto initial_suspend() { return std::suspend_always(); }
auto final_suspend() noexcept { return std::suspend_always(); }
void yield_value(int v) { value_ = v; }
void unhandled_exception() {}
};
int resumable::recent_val(){return handle_.promise().value_;}
resumable foo(int n){
int x = 1;
co_await std::suspend_always();
int y = 2;
co_yield n + x + y; // { dg-error "awaitable type 'void' is not a structure" }
}