[Haskell-cafe] ANNOUNCE: iterIO-0.1 - iteratee-based IO with pipe operators
dm-list-haskell-cafe at scs.stanford.edu
Fri May 6 06:15:40 CEST 2011
Hi, everyone. I'm pleased to announce the release of a new iteratee
IterIO is an attempt to make iteratees easier to use through an
interface based on pipeline stages reminiscent of Unix command
pipelines. Particularly if you've looked at iteratees before and been
intimidated, please have a look at iterIO to see if it makes them more
Some aspects of iterIO that should simplify learning and using
* Every aspect of the library is thoroughly document in haddock
including numerous examples of use.
* Enumerators are easy to build out of iteratees.
* There is no difference between enumerators and "enumeratees"
(i.e., inner pipeline stages). The former is just a
type-restricted version of the latter.
* Parsing combinators provide detailed error reporting and support
LL(*) rather than LL(1) parsing, leading to fewer non-intuitive
parsing failures. A couple of tricks avoid consuming excessive
memory for backtracking.
* Super-fast LL(1) parsing is also available through seamless
integration with attoparsec.
* A universal exception mechanism works across invocations of mtl
monad transformers, thereby unifying error handling.
* All pipe operators have uniform semantics, eliminating corner
cases. In particular, if the writing end of a pipe fails, the
reading end always gets EOF, allowing it to clean up resources.
* One can catch exceptions thrown by any contiguous subset of
stages in a pipeline. Moreover, enumerator exception handlers
can resume downstream stages that haven't failed.
* The package is full of useful iteratees and enumerators,
including basic file and socket processing, parsec-like
combinators, string search, zlib/gzip compression, SSL, HTTP, and
"loopback" enumerator/iteratee pairs for testing a protocol
implementation against itself.
Please enjoy. I'd love to hear feedback.
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