abstract class Promise(Input)

• Promise(Input)
• Reference
• Object

Direct Known Subclasses

• Promise::DeferredPromise(Input)

Defined in:

promise.cr

Class Method Summary

• .all(promises)
• .all(*promises)
• .defer(timeout = nil, &block : -> _)

  Execute code in the next tick of the event loop and return a promise for obtaining the value

• .map(collection : Enumerable(T), &block : T -> V) forall T, V

  Asynchronously map an Enumerable

• .race(promises)

  returns the first promise to either reject or complete

• .race(*promises)

  returns the first promise to either reject or complete

• .resolve(value)

  Returns a resolved promise of the type passed

• .timeout(promise : Promise, time : Time::Span)

Macro Summary

• collective_action(name, &block)

  this drys up the code dealing with splats and enumerables

• new(type, timeout = nil)
• reject(type, reason)

Instance Method Summary

• #catch(&errback : Exception -> _)
• #finally(&callback : Exception | Nil -> _)
• #then : DeferredPromise(Nil)
• #type : Class

  Interfaces available to generic types

Class Method Detail

Macro Detail

Instance Method Detail