The io-streams package

[Tags: bsd3, library]

Overview

The io-streams library contains simple and easy-to-use primitives for I/O using streams. Most users will want to import the top-level convenience module System.IO.Streams, which re-exports most of the library:

import           System.IO.Streams (InputStream, OutputStream)
import qualified System.IO.Streams as Streams

For first-time users, io-streams comes with an included tutorial, which can be found in the System.IO.Streams.Tutorial module.

Features

The io-streams user API has two basic types: InputStream a and OutputStream a, and three fundamental I/O primitives:

-- read an item from an input stream
Streams.read :: InputStream a -> IO (Maybe a)

-- push an item back to an input stream
Streams.unRead :: a -> InputStream a -> IO ()

-- write to an output stream
Streams.write :: Maybe a -> OutputStream a -> IO ()

Streams can be transformed by composition and hooked together with provided combinators:

ghci> Streams.fromList [1,2,3::Int] >>= Streams.map (*10) >>= Streams.toList
[10,20,30]

Stream composition leaves the original stream accessible:

ghci> input <- Streams.fromByteString "long string"
ghci> wrapped <- Streams.takeBytes 4 input
ghci> Streams.read wrapped
Just "long"
ghci> Streams.read wrapped
Nothing
ghci> Streams.read input
Just " string"

Simple types and operations in the IO monad mean straightforward and simple exception handling and resource cleanup using Haskell standard library facilities like Control.Exception.bracket.

io-streams comes with:


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Properties

Versions1.0.0.0, 1.0.0.1, 1.0.1.0, 1.0.2.0, 1.0.2.1, 1.0.2.2, 1.1.0.0, 1.1.0.1, 1.1.0.2, 1.1.0.3, 1.1.1.0, 1.1.2.0, 1.1.2.1, 1.1.2.2, 1.1.3.0, 1.1.4.0, 1.1.4.1, 1.1.4.2, 1.1.4.3, 1.1.4.4, 1.1.4.5, 1.1.4.6, 1.2.0.0, 1.2.0.1, 1.2.1.1, 1.2.1.2, 1.2.1.3, 1.3.0.0, 1.3.1.0
Change logchangelog.md
Dependenciesattoparsec (>=0.10 && <0.14), base (==4.*), bytestring (>=0.9 && <0.11), bytestring-builder (==0.10.*), network (>=2.3 && <2.7), primitive (>=0.2 && <0.7), process (>=1.1 && <1.3), text (>=0.10 && <1.3), time (>=1.2 && <1.6), transformers (>=0.2 && <0.5), vector (>=0.7 && <0.11), zlib-bindings (==0.1.*) [details]
LicenseBSD3
MaintainerGregory Collins <greg@gregorycollins.net>
CategoryData, Network, IO-Streams
Bug trackerhttps://github.com/snapframework/io-streams/issues
Source repositoryhead: git clone https://github.com/snapframework/io-streams.git
UploadedTue Jun 9 16:06:20 UTC 2015 by GregoryCollins
DistributionsDebian:1.1.4.6, Fedora:1.2.1.1, NixOS:1.3.1.0, Stackage:1.3.1.0
Downloads16070 total (405 in last 30 days)
Votes
2 []
StatusDocs available [build log]
Last success reported on 2015-06-11 [all 1 reports]

Modules

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Flags

NameDescriptionDefault
nointeractivetestsDo not run interactive testsDisabled

Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info

Downloads

Maintainers' corner

For package maintainers and hackage trustees

Readme for io-streams-1.3.1.0

The io-streams library contains simple and easy to use primitives for I/O using streams. Based on simple types with one type parameter (InputStream a and OutputStream a), io-streams provides a basic interface to side-effecting input and output in IO monad with the following features: