<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><title>Language extensions in nhc98</title></head>
<body bgcolor='#ffffff'>
<table><tr><td width=500>
<center><h1>Language extensions in nhc98</h1></center>
<hr>
<h3>What language extensions does <em>nhc98</em> support?</h3>
<p>
Extensions of the Haskell'98 language available in <em>nhc98</em> include:
<ul>
<li>
The standard <a href="ffi.html">primitive FFI</a> language addendum.
<li>
Extended module namespaces, of the form Long.Hierarchical.Module.Name.
<li>
Local forall quantification on datatypes. (Also known as existential
types, not to be confused with rank-2 types.)
<li>
Pattern guards (new in 1.20).
<li>
Some common standard hierarchical libraries packages. Use the
compiler option e.g. <tt>-package base</tt> to access them.
<li>
The NHC.IOExtras library, containing IORefs, IOArrays, trace,
unsafePerformIO, etc.
<li>
Andy Gill's Observe.lhs library, used for HOOD debugging.
<li>
A <em>Binary</em> data representation library.
In summary, this library
module provides bit-stream operations and a new Binary class for which
the compiler fully supports "deriving" clauses.
Fuller details can be found in [1] and in
<a href="libs/Binary.html">this documentation</a>.
</ul>
<h4>References</h4>
<p>
[1] The Bits Between The Lambdas - Binary Data in a Lazy Functional Language,
Malcolm Wallace and Colin Runciman, Proceedings of the International
Symposium on Memory Management, Vancouver, Oct 1998.
[<a href="ftp://ftp.cs.york.ac.uk/pub/malcolm/ismm98.html">FTP site</a>]
<hr>
<p>
The latest updates to these pages are available on the WWW from
<a href="http://www.haskell.org/nhc98/">
<tt>http://www.haskell.org/nhc98/</tt></a>
<p>
23rd November 2007<br>
<a href="http://www.cs.york.ac.uk/fp/">
York Functional Programming Group</a><br>
</td></tr></table>
</body></html>
|
