The AsyncBuilder is a type used by the Task.create builder,
in order to change its behavior based on the type of the
cancelation token.
In combination with the
Partially-Applied Type technique,
this ends up providing a polymorphic Task.create that can
support multiple cancelation tokens optimally, i.e. without
implicit conversions and that can be optimized depending on
the CancelToken used - for example if Unit is returned,
then the yielded task will not be cancelable and the internal
implementation will not have to worry about managing it, thus
increasing performance.
- Companion:
- object
class Object
trait Matchable
class Any