| #if __has_include (<coroutine>) |
| #include <coroutine> |
| using namespace std; |
| #elif defined (__clang__) && __has_include (<experimental/coroutine>) |
| #include <experimental/coroutine> |
| using namespace std::experimental; |
| #endif |
| |
| struct dummy_coro |
| { |
| using promise_type = dummy_coro; |
| bool await_ready() noexcept { return false; } |
| void await_suspend(std::coroutine_handle<>) noexcept { } |
| void await_resume() noexcept { } |
| dummy_coro get_return_object() { return {}; } |
| dummy_coro initial_suspend() { return {}; } |
| dummy_coro final_suspend() noexcept { return {}; } |
| void return_void() { } |
| void unhandled_exception() { } |
| }; |
| |
| template <int ...I> |
| dummy_coro |
| foo() |
| { |
| ((co_await [](int){ return std::suspend_never{}; }(I)), ...); |
| co_return; |
| } |
| |
| void bar() { |
| foo<1>(); |
| } |
