futures-preview 0.2.2

An implementation of futures and streams featuring zero allocations, composability, and iterator-like interfaces.
Documentation
Abstractions for asynchronous programming. This crate provides a number of core abstractions for writing asynchronous code: - [Futures](::Future) (sometimes called promises), which represent a single asychronous computation that may result in a final value or an error. - [Streams](::Stream), which represent a series of values or errors produced asynchronously. - [Sinks](::Sink), which support asynchronous writing of data. - [Executors](::executor), which are responsible for running asynchronous tasks. The crate also contains abstractions for [asynchronous I/O](::io) and [cross-task communication](::channel). Underlying all of this is the *task system*, which is a form of lightweight threading. Large asynchronous computations are built up using futures, streams and sinks, and then spawned as independent tasks that are run to completion, but *do not block* the thread running them.