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SMLNJLibrary
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The <a class="external" href="http://www.smlnj.org/doc/smlnj-lib/index.html"><img src="moin-www.png" alt="[WWW]" height="11" width="11">SML/NJ Library</a> is a collection of libraries that are distributed with SML/NJ. Due to differences between SML/NJ and MLton, these libraries will not work out-of-the box with MLton. <p>
As of 20100402, MLton includes a port of the SML/NJ Library synchronized with SML/NJ version 110.72.
</p>
<h2 id="head-0bb18642b70b9f8a9c12ccf39487328f306b8e19">Usage</h2>
<ul>
<li>
<p>
You can import a sub-library of the SML/NJ Library into an MLB file with:
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MLB file</td>
<td align="center">
Description</td>
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<tt>$(SML_LIB)/smlnj-lib/Util/smlnj-lib.mlb</tt></td>
<td>
Various utility modules, included collections, simple formating, ...</td>
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<tt>$(SML_LIB)/smlnj-lib/Controls/controls-lib.mlb</tt></td>
<td>
A library for managing control flags in an application.</td>
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<tt>$(SML_LIB)/smlnj-lib/HashCons/hash-cons-lib.mlb</tt></td>
<td>
Support for implementing hash-consed data structures.</td>
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<tt>$(SML_LIB)/smlnj-lib/HTML/html-lib.mlb</tt></td>
<td>
HTML parsing and pretty-printing library.</td>
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<td>
<tt>$(SML_LIB)/smlnj-lib/INet/inet-lib.mlb</tt></td>
<td>
Networking utilities; supported on both Unix and Windows systems.</td>
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<td>
<tt>$(SML_LIB)/smlnj-lib/PP/pp-lib.mlb</tt></td>
<td>
Pretty-printing library.</td>
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<tt>$(SML_LIB)/smlnj-lib/Reactive/reactive-lib.mlb</tt></td>
<td>
Reactive scripting library.</td>
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<tt>$(SML_LIB)/smlnj-lib/RegExp/regexp-lib.mlb</tt></td>
<td>
Regular expression library.</td>
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<tt>$(SML_LIB)/smlnj-lib/Unix/unix-lib.mlb</tt></td>
<td>
Utilities for Unix-based operating systems.</td>
</tr>
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</li>
<li class="gap">
<p>
If you are porting a project from SML/NJ's <a href="CompilationManager">CompilationManager</a> to MLton's <a href="MLBasis"> ML Basis system</a> using <tt>cm2mlb</tt>, note that the following maps are included by default:
<pre>$smlnj-lib.cm $(SML_LIB)/smlnj-lib/Util
$controls-lib.cm $(SML_LIB)/smlnj-lib/Controls
$hash-cons-lib.cm $(SML_LIB)/smlnj-lib/HashCons
$html-lib.cm $(SML_LIB)/smlnj-lib/HTML
$inet-lib.cm $(SML_LIB)/smlnj-lib/INet
$pp-lib.cm $(SML_LIB)/smlnj-lib/PP
$reactive-lib.cm $(SML_LIB)/smlnj-lib/Reactive
$regexp-lib.cm $(SML_LIB)/smlnj-lib/RegExp
$unix-lib.cm $(SML_LIB)/smlnj-lib/Unix
</pre> This will automatically convert a <tt>$/smlnj-lib.cm</tt> import in an input <tt>.cm</tt> file into a <tt>$(SML_LIB)/smlnj-lib/Util/smlnj-lib.mlb</tt> import in the output <tt>.mlb</tt> file.
</p>
</li>
</ul>
<h2 id="head-dc3decbb93847518f1a049dcf49d0d7c6560bcc6">Details</h2>
<p>
The following changes were made to the SML/NJ Library, in addition to deriving the <tt>.mlb</tt> files from the <tt>.cm</tt> files:
</p>
<ul>
<li>
<p>
<tt>Util/redblack-set-fn.sml</tt> (modified): Rewrote use of <tt>where</tt> structure specification.
</p>
</li>
<li>
<p>
<tt>Util/redblack-map-fn.sml</tt> (modified): Rewrote use of <tt>where</tt> structure specification.
</p>
</li>
<li>
<p>
<tt>Util/graph-scc-fn.sml</tt> (modified): Rewrote use of <tt>where</tt> structure specification.
</p>
</li>
<li>
<p>
<tt>Util/bit-array.sml</tt> (modified): The computation of the <tt>maxLen</tt> is given by:
<pre>val maxLen = 8*Word8Array.maxLen
</pre> This is fine in SML/NJ where <tt>Word8Array.maxLen</tt> is 16777215, but in MLton, <tt>Word8Array.maxLen</tt> is equal to <tt>valOf(Int.maxInt)</tt>, so the computation overflows. To accommodate both SML/NJ and MLton, the computation is replaced by
<pre>val maxLen = (8*Word8Array.maxLen) handle Overflow => Word8Array.maxLen
</pre>
</p>
</li>
<li>
<p>
<tt>Util/engine.mlton.sml</tt> (added, not exported): Implements <tt>structure Engine</tt>, providing time-limited, resumable computations using <a href="MLtonThread">MLtonThread</a>, <a href="MLtonSignal">MLtonSignal</a>, and <a href="MLtonItimer">MLtonItimer</a>.
</p>
</li>
<li>
<p>
<tt>Util/time-limit.mlton.sml</tt> (added): Implements <tt>structure TimeLimit</tt> using <tt>structure Engine</tt>. The SML/NJ implementation of <tt>structure TimeLimit</tt> uses SML/NJ's first-class continuations, signals, and interval timer.
</p>
</li>
<li>
<p>
<tt>Util/time-limit.mlb</tt> (added): Exports <tt>structure TimeLimit</tt>, which is <em>not</em> exported by <tt>smlnj-lib.mlb</tt>. Since MLton is very conservative in the presence of threads and signals, program performance may be adversely affected by unnecessarily including <tt>structure TimeLimit</tt>.
</p>
</li>
<li>
<p>
<tt>HTML/html-elements-fn.sml</tt> (modified): Rewrote use of <em>or-patterns</em>.
</p>
</li>
<li>
<p>
<tt>HTML/html-attrs-fn.sml</tt> (modified): Rewrote use of <em>or-patterns</em>.
</p>
</li>
</ul>
<h2 id="head-190aa842474f4bfcec9c8cde305af27b7d07764d">Patch</h2>
<ul>
<li>
<p>
<a href = "http://mlton.org/cgi-bin/viewsvn.cgi/mlton/tags/on-MLTONWIKIVERSION-release/lib/smlnj-lib/smlnj-lib.patch?view=markup"><img src="moin-www.png" alt="[WWW]" height="11" width="11">smlnj-lib.patch</a>
</p>
</li>
</ul>
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<p>
<hr>
Last edited on 2010-06-08 14:42:48 by <span title="fenrir.cs.rit.edu"><a href="MatthewFluet">MatthewFluet</a></span>.
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