dpp::detail::coroutine::coroutine_base< R > Class Template Reference

Base class of dpp::coroutine<R>. More...

#include <coroutine.h>

Inheritance diagram for dpp::detail::coroutine::coroutine_base< R >:

Collaboration diagram for dpp::detail::coroutine::coroutine_base< R >:

Public Member Functions
	coroutine_base ()=default
	Default constructor, creates an empty coroutine. More...
	coroutine_base (const coroutine_base &)=delete
	Copy constructor is disabled. More...
	coroutine_base (coroutine_base &&other) noexcept
	Move constructor, grabs another coroutine's handle. More...
	~coroutine_base ()
	Destructor, destroys the handle. More...
coroutine_base &	operator= (const coroutine_base &)=delete
	Copy assignment is disabled. More...
coroutine_base &	operator= (coroutine_base &&other) noexcept
	Move assignment, grabs another coroutine's handle. More...
bool	await_ready () const
	First function called by the standard library when the coroutine is co_await-ed. More...
template<typename T >
handle_t< R >	await_suspend (detail::std_coroutine::coroutine_handle< T > caller) noexcept
	Second function called by the standard library when the coroutine is co_await-ed. More...
decltype(auto)	await_resume () &
	Function called by the standard library when the coroutine is resumed. More...
decltype(auto)	await_resume () const &
	Function called by the standard library when the coroutine is resumed. More...
decltype(auto)	await_resume () &&
	Function called by the standard library when the coroutine is resumed. More...

Protected Attributes
detail::coroutine::handle_t< R >	handle {nullptr}
	Coroutine handle. More...

Friends
struct	promise_t< R >
	Promise has friend access for the constructor. More...

Detailed Description

template<typename R>
class dpp::detail::coroutine::coroutine_base< R >

Base class of dpp::coroutine<R>.

Warning

This class should not be used directly by a user, use dpp::coroutine<R> instead.

Note

This class contains all the functions used internally by co_await. It is intentionally opaque and a private base of dpp::coroutine<R> so a user cannot call await_suspend and await_resume directly.

Constructor & Destructor Documentation

coroutine_base() [1/3]

template<typename R >

dpp::detail::coroutine::coroutine_base< R >::coroutine_base ( )

default

Default constructor, creates an empty coroutine.

coroutine_base() [2/3]

template<typename R >

dpp::detail::coroutine::coroutine_base< R >::coroutine_base ( const coroutine_base< R > &  )

delete

Copy constructor is disabled.

coroutine_base() [3/3]

template<typename R >

dpp::detail::coroutine::coroutine_base< R >::coroutine_base ( coroutine_base< R > &&  other )

inlinenoexcept

Move constructor, grabs another coroutine's handle.

Parameters

other

Coroutine to move the handle from

~coroutine_base()

template<typename R >

dpp::detail::coroutine::coroutine_base< R >::~coroutine_base ( )

inline

Destructor, destroys the handle.

Member Function Documentation

await_ready()

template<typename R >

bool dpp::detail::coroutine::coroutine_base< R >::await_ready ( ) const

inline

First function called by the standard library when the coroutine is co_await-ed.

Remarks

Do not call this manually, use the co_await keyword instead.

Exceptions

invalid_operation_exception

if the coroutine is empty or finished.

Returns

bool Whether the coroutine is done

await_resume() [1/3]

template<typename R >

decltype(auto) dpp::detail::coroutine::coroutine_base< R >::await_resume ( ) &

inline

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

Remarks

Do not call this manually, use the co_await keyword instead.

Exceptions

Throws

any exception thrown or uncaught by the coroutine

Returns

R The result of the coroutine. It is given to the caller as a result to co_await

await_resume() [2/3]

template<typename R >

decltype(auto) dpp::detail::coroutine::coroutine_base< R >::await_resume ( ) &&

inline

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

Remarks

Do not call this manually, use the co_await keyword instead.

Exceptions

Throws

any exception thrown or uncaught by the coroutine

Returns

R The result of the coroutine. It is given to the caller as a result to co_await

await_resume() [3/3]

template<typename R >

decltype(auto) dpp::detail::coroutine::coroutine_base< R >::await_resume ( ) const &

inline

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

Remarks

Do not call this manually, use the co_await keyword instead.

Exceptions

Throws

any exception thrown or uncaught by the coroutine

Returns

R The result of the coroutine. It is given to the caller as a result to co_await

await_suspend()

template<typename R >

template<typename T >

handle_t< R > dpp::detail::coroutine::coroutine_base< R >::await_suspend ( detail::std_coroutine::coroutine_handle< T >  caller )

inlinenoexcept

Second function called by the standard library when the coroutine is co_await-ed.

Stores the calling coroutine in the promise to resume when this coroutine suspends.

Remarks

Do not call this manually, use the co_await keyword instead.

Parameters

caller

The calling coroutine, now suspended

operator=() [1/2]

template<typename R >

coroutine_base & dpp::detail::coroutine::coroutine_base< R >::operator= ( const coroutine_base< R > &  )

delete

Copy assignment is disabled.

operator=() [2/2]

template<typename R >

coroutine_base & dpp::detail::coroutine::coroutine_base< R >::operator= ( coroutine_base< R > &&  other )

inlinenoexcept

Move assignment, grabs another coroutine's handle.

Parameters

other

Coroutine to move the handle from

Friends And Related Function Documentation

promise_t< R >

template<typename R >

friend struct promise_t< R >

friend

Promise has friend access for the constructor.

Member Data Documentation

handle

template<typename R >

detail::coroutine::handle_t<R> dpp::detail::coroutine::coroutine_base< R >::handle {nullptr}

protected

Coroutine handle.