<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta name="robots" content="index,nofollow">



<title>MLtonCont - MLton Standard ML Compiler (SML Compiler)</title>
<link rel="stylesheet" type="text/css" charset="iso-8859-1" media="all" href="common.css">
<link rel="stylesheet" type="text/css" charset="iso-8859-1" media="screen" href="screen.css">
<link rel="stylesheet" type="text/css" charset="iso-8859-1" media="print" href="print.css">


<link rel="Start" href="Home">


</head>

<body lang="en" dir="ltr">

<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-833377-1";
urchinTracker();
</script>
<table bgcolor = lightblue cellspacing = 0 style = "border: 0px;" width = 100%>
  <tr>
    <td style = "
		border: 0px;
		color: darkblue; 
		font-size: 150%;
		text-align: left;">
      <a class = mltona href="Home">MLton MLTONWIKIVERSION</a>
    <td style = "
		border: 0px;
		font-size: 150%;
		text-align: center;
		width: 50%;">
      MLtonCont
    <td style = "
		border: 0px;
		text-align: right;">
      <table cellspacing = 0 style = "border: 0px">
        <tr style = "vertical-align: middle;">
      </table>
  <tr style = "background-color: white;">
    <td colspan = 3
	style = "
		border: 0px;
		font-size:70%;
		text-align: right;">
      <a href = "Home">Home</a>
      &nbsp;<a href = "Index">Index</a>
      &nbsp;
</table>
<div id="content" lang="en" dir="ltr">

<pre class=code>
<B><FONT COLOR="#0000FF">signature</FONT></B> MLTON_CONT =
   <B><FONT COLOR="#0000FF">sig</FONT></B>
      <B><FONT COLOR="#A020F0">type</FONT></B><B><FONT COLOR="#228B22"> 'a t

      </FONT></B><B><FONT COLOR="#A020F0">val</FONT></B> callcc: ('a t -&gt; 'a) -&gt; 'a
      <B><FONT COLOR="#A020F0">val</FONT></B> prepend: 'a t * ('b -&gt; 'a) -&gt; 'b t
      <B><FONT COLOR="#A020F0">val</FONT></B> throw: 'a t * 'a -&gt; 'b
      <B><FONT COLOR="#A020F0">val</FONT></B> throw': 'a t * (unit -&gt; 'a) -&gt; 'b
   <B><FONT COLOR="#0000FF">end</FONT></B>
</PRE>
<p>
 
</p>

    <ul>

    <li>
<p>
 <tt>type&nbsp;'a&nbsp;t</tt>  <br>
the type of continuations that expect a value of type <tt>'a</tt>. 
</p>
</li>
    <li class="gap">
<p>
 <tt>callcc&nbsp;f</tt>  <br>
applies <tt>f</tt> to the current continuation.  This copies the entire  stack; hence, <tt>callcc</tt> takes time proportional to the current  stack size. 
</p>
</li>
    <li class="gap">
<p>
 <tt>prepend&nbsp;(k,&nbsp;f)</tt>  <br>
composes a function <tt>f</tt> with a continuation <tt>k</tt> to create a  continuation that first does <tt>f</tt> and then does <tt>k</tt>.  This  is a constant time operation. 
</p>
</li>
    <li class="gap">
<p>
 <tt>throw&nbsp;(k,&nbsp;v)</tt>  <br>
throws value <tt>v</tt> to continuation <tt>k</tt>.  This copies the entire  stack of <tt>k</tt>; hence, <tt>throw</tt> takes time proportional to the   size of this stack. 
</p>
</li>
    <li class="gap">
<p>
 <tt>throw'&nbsp;(k,&nbsp;th)</tt>  <br>
a generalization of throw that evaluates <tt>th&nbsp;()</tt> in the context  of <tt>k</tt>.  Thus, for example, if <tt>th&nbsp;()</tt> raises an exception or  grabs another continuation, it will see <tt>k</tt>, not the current  continuation. 
</p>
</li>
</ul>

</div>



<p>
<hr>
Last edited on 2007-08-23 03:43:48 by <span title="c-71-57-91-146.hsd1.il.comcast.net"><a href="MatthewFluet">MatthewFluet</a></span>.
</body></html>
