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SXML
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SXML is an <a href="IntermediateLanguage">IntermediateLanguage</a>, translated from <a href="XML">XML</a> by <a href="Monomorphise">Monomorphise</a>, optimized by <a href="SXMLSimplify">SXMLSimplify</a>, and translated by <a href="ClosureConvert">ClosureConvert</a> to <a href="SSA">SSA</a>. <h2 id="head-55f8ebc805e65b5b71ddafdae390e3be2bcd69af">Description</h2>
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SXML is a simply-typed version of <a href="XML">XML</a>.
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<h2 id="head-8781d615fd77be9578225c40ac67b9471394cced">Implementation</h2>
<a href = "http://mlton.org/cgi-bin/viewsvn.cgi/mlton/tags/on-MLTONWIKIVERSION-release/mlton/xml/sxml.sig?view=markup"><img src="moin-www.png" alt="[WWW]" height="11" width="11">sxml.sig</a> <a href = "http://mlton.org/cgi-bin/viewsvn.cgi/mlton/tags/on-MLTONWIKIVERSION-release/mlton/xml/sxml.fun?view=markup"><img src="moin-www.png" alt="[WWW]" height="11" width="11">sxml.fun</a><br>
<a href = "http://mlton.org/cgi-bin/viewsvn.cgi/mlton/tags/on-MLTONWIKIVERSION-release/mlton/xml/sxml-tree.sig?view=markup"><img src="moin-www.png" alt="[WWW]" height="11" width="11">sxml-tree.sig</a> <h2 id="head-a6de4b535fedeaa8890bd890b60fe09f87b5f96a">Type Checking</h2>
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SXML shares the type checker for <a href="XML">XML</a>.
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<h2 id="head-35ec00231a68203708e39f0e2cc10b50c6bf62de">Details and Notes</h2>
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There are only two differences between <a href="XML">XML</a> and SXML. First, SXML <tt>val</tt>, <tt>fun</tt>, and <tt>datatype</tt> declarations always have an empty list of type variables. Second, SXML variable references always have an empty list of type arguments. Constructors uses can only have a nonempty list of type arguments if the constructor is a primitive.
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Although we could rely on the type system to enforce these constraints by parameterizing the <a href="XML">XML</a> signature, <a href="StephenWeeks">StephenWeeks</a> did so in a previous version of the compiler, and the software engineering gains were not worth the effort.
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Last edited on 2006-11-02 17:47:41 by <span title="76.16.241.4"><a href="MatthewFluet">MatthewFluet</a></span>.
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