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// PR c++/105406
// { dg-do compile { target c++20 } }
#include <coroutine>
#include <exception>
// A move-only awaitable
class MoveOnlyAwaitable {
public:
MoveOnlyAwaitable() = default;
MoveOnlyAwaitable(MoveOnlyAwaitable &&) = default;
MoveOnlyAwaitable &operator=(MoveOnlyAwaitable &&) = default;
MoveOnlyAwaitable(const MoveOnlyAwaitable &) = delete;
MoveOnlyAwaitable &operator=(const MoveOnlyAwaitable &) = delete;
bool await_ready() const noexcept { return false; }
void await_suspend(std::coroutine_handle<>) noexcept {}
void await_resume() {}
};
struct task {
struct promise_type {
auto initial_suspend() const { return std::suspend_never{}; }
auto final_suspend() const noexcept { return std::suspend_never(); }
auto get_return_object() { return task{}; }
void return_void() {}
void unhandled_exception() {}
template<typename T>
T &&await_transform(T &&t) {
return static_cast<T &&>(t);
}
};
bool await_ready() const { return false; }
void await_suspend(std::coroutine_handle<> awaiter) {}
void await_resume() {}
};
task myCoroutine() {
// GCC: OK
// clang: OK
{
co_await MoveOnlyAwaitable();
}
// GCC: OK
// clang: OK
{
auto moveonly = MoveOnlyAwaitable();
co_await std::move(moveonly);
}
// GCC <= 11.2: OK
// GCC 11.3:ERROR: error: use of deleted function 'MoveOnlyAwaitable::MoveOnlyAwaitable(const MoveOnlyAwaitable&)
// clang: OK
{
auto moveonly = MoveOnlyAwaitable();
co_await moveonly;
}
}
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