dpp::detail::task::promise_base< R > Struct Template Reference

Base implementation of task::promise_t, without the logic that would depend on the return type. Meant to be inherited from. More...

Inheritance diagram for dpp::detail::task::promise_base< R >:

Collaboration diagram for dpp::detail::task::promise_base< R >:

Classes
struct	proxy_awaiter
	Proxy awaitable that wraps any co_await inside the task and checks for cancellation on resumption. More...

Public Member Functions
std_coroutine::suspend_never	initial_suspend () const noexcept
	Function called by the standard library when the coroutine is created. More...
void	unhandled_exception ()
	Function called by the standard library when an exception is thrown and not caught in the coroutine. More...
template<typename T >
auto	await_transform (T &&expr) const noexcept(noexcept(co_await_resolve(std::forward< T >(expr))))
	Function called whenever co_await is used inside of the task. More...

Public Attributes
std::atomic< bool >	cancelled = false
	Whether the task is cancelled or not. More...

Detailed Description

template<typename R>
struct dpp::detail::task::promise_base< R >

Base implementation of task::promise_t, without the logic that would depend on the return type. Meant to be inherited from.

Member Function Documentation

await_transform()

template<typename R >

template<typename T >

auto dpp::detail::task::promise_base< R >::await_transform ( T &&  expr ) const

inlinenoexcept

Function called whenever co_await is used inside of the task.

Exceptions

dpp::task_cancelled_exception

On resumption if the task was cancelled

Returns

proxy_awaiter Returns a proxy awaiter that will check for cancellation on resumption

initial_suspend()

template<typename R >

std_coroutine::suspend_never dpp::detail::task::promise_base< R >::initial_suspend ( ) const

inlinenoexcept

Function called by the standard library when the coroutine is created.

Returns

std::suspend_never Don't suspend, the coroutine starts immediately.

unhandled_exception()

template<typename R >

void dpp::detail::task::promise_base< R >::unhandled_exception ( )

inline

Function called by the standard library when an exception is thrown and not caught in the coroutine.

Stores the exception pointer to rethrow on co_await. If the task object is destroyed and was not cancelled, throw instead

Member Data Documentation

cancelled

template<typename R >

std::atomic<bool> dpp::detail::task::promise_base< R >::cancelled = false

Whether the task is cancelled or not.