class Promise(T)

• Promise(T)
• Reference
• Object

Defined in:

promise.cr

Constructors

• .new(&block : T -> Nil, String | Exception -> Nil -> _)

  Creates a new Promise with procs for how to resolve and how to reject the promise.

Class Method Summary

• .all(promises : Array(Promise(T | Nil)))

  The Promise(T).all(Array(Promise(T | Nil)) method returns a promise that resolves when all of the promises in the iterable argument have resolved, or rejects with the reason of the first passed promise that rejects.

• .execute(&block : -> T)

  The Promise(T).execute(&block) method returns a Promise object that is resolved by the return value of the block.

• .race(promises : Array(Promise(T | Nil)))

  The Promise.race(Array(Promise(T | Nil)) method returns a Promise that is settled the same way as the first passed promise to settle.

• .reject(message : String)

  The Promise(T).reject(reason) method returns a Promise object that is rejected with the given reason.

• .reject(ex : Exception)

  The Promise(T).reject(reason) method returns a Promise object that is rejected with the given reason.

• .resolve(value : T)

  The Promise(T).resolve(T) method returns a Promise.then object that is resolved with the given value.

Instance Method Summary

• #await

  Will block until the chain before the specified wait has finished it's operations, then returns the last value.

• #catch(&block : Exception -> _)

  Specifies an operation to complete after the previous operation has been rejected.

• #pending?
• #rejected?
• #resolved?
• #state
• #then(&block : T -> _)

  Specifies an operation to complete after the previous operation has been resolved.

Constructor Detail

Class Method Detail

Instance Method Detail