folly::coro::is_awaiter< T, typename > Struct Template Reference
#include <Traits.h>
Inheritance diagram for folly::coro::is_awaiter< T, typename >:
Detailed Description
template<typename T, typename = void>
struct folly::coro::is_awaiter< T, typename >
is_awaiter<T>::value is_awaiter_v<T>
Template metafunction for querying whether the specified type implements the 'Awaiter' concept.
An 'Awaiter' must have the following three methods.
- awaiter.await_ready() -> bool
- awaiter.await_suspend(std::experimental::coroutine_handle<void>()) -> void OR bool OR std::experimental::coroutine_handle<T> for some T
- awaiter.await_resume()
Note that the requirement to accept coroutine_handle<void> rather than just some coroutine_handle
is to ensure that the awaitable can be awaited in any coroutine context where the promise_type does not modify what is normally awaitable through use of await_transform().
The documentation for this struct was generated from the following file:
- proxygen/folly/folly/experimental/coro/Traits.h
