fiber::_TryAwait< T, is_rvalue_reference > Class Template Reference

Awaits on something that returns an std::optional and throws if it does not have a value. More...

#include <TryAwait.hpp>

Public Member Functions
	_TryAwait (fiber::Future< T > &&awaitable)
	Hijacks the other awaitable or Future.
bool	await_ready () const noexcept
	Forwards the ready call to the real awaitable.
T	await_resume ()
	Unpacks the std::optional from the true awaitables await_resume
template<class ReturnType>
void	await_suspend (std::coroutine_handle< fiber::CoroutinePromise< ReturnType > > handle) noexcept
	Forwards the suspend call to the real awaitable.

Detailed Description

template<class T, bool is_rvalue_reference = true>
class fiber::_TryAwait< T, is_rvalue_reference >

Awaits on something that returns an std::optional and throws if it does not have a value.

Example:

Future<int> async_func(); // returns `std::optional<int>` in `co_await`
 
Coroutine<Exit> main(){
 
// TryAwait unpacks the int and throws if the optional does not hold a value
 int result = co_await TryAwait(async_func()); 
}

Constructor & Destructor Documentation

_TryAwait()

template<class T, bool is_rvalue_reference = true>

fiber::_TryAwait< T, is_rvalue_reference >::_TryAwait ( fiber::Future< T > && awaitable )

inline

Hijacks the other awaitable or Future.

Member Function Documentation

await_ready()

template<class T, bool is_rvalue_reference = true>

bool fiber::_TryAwait< T, is_rvalue_reference >::await_ready ( ) const

inlinenoexcept

Forwards the ready call to the real awaitable.

await_resume()

template<class T, bool is_rvalue_reference = true>

T fiber::_TryAwait< T, is_rvalue_reference >::await_resume ( )

inline

Unpacks the std::optional from the true awaitables await_resume

Either returns the the unpacked value of the true awaitables await_resume or throws an fiber::Exception if that optional does not contain a value.

Exceptions

`fiber::Exception`

if the awaitables result of type std::otional does not have a value.

Returns

the unpacked value fot the std::optional from the real awaitables await_resume

await_suspend()

template<class T, bool is_rvalue_reference = true>

template<class ReturnType>

void fiber::_TryAwait< T, is_rvalue_reference >::await_suspend ( std::coroutine_handle< fiber::CoroutinePromise< ReturnType > > handle )

inlinenoexcept

Forwards the suspend call to the real awaitable.

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The documentation for this class was generated from the following file:

• fiber/OS/TryAwait.hpp