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<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 -> 'a) -> 'a
<B><FONT COLOR="#A020F0">val</FONT></B> isolate: ('a -> unit) -> 'a t
<B><FONT COLOR="#A020F0">val</FONT></B> prepend: 'a t * ('b -> 'a) -> 'b t
<B><FONT COLOR="#A020F0">val</FONT></B> throw: 'a t * 'a -> 'b
<B><FONT COLOR="#A020F0">val</FONT></B> throw': 'a t * (unit -> 'a) -> 'b
<B><FONT COLOR="#0000FF">end</FONT></B>
</PRE>
<p>
</p>
<ul>
<li>
<p>
<tt>type 'a t</tt> <br>
the type of continuations that expect a value of type <tt>'a</tt>.
</p>
</li>
<li class="gap">
<p>
<tt>callcc 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 size of the current stack.
</p>
</li>
<li class="gap">
<p>
<tt>isolate f</tt> <br>
creates a continuation that evaluates <tt>f</tt> in an empty context. This is a constant time operation, and yields a constant size stack.
</p>
</li>
<li class="gap">
<p>
<tt>prepend (k, 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 (k, 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' (k, th)</tt> <br>
a generalization of throw that evaluates <tt>th ()</tt> in the context of <tt>k</tt>. Thus, for example, if <tt>th ()</tt> raises an exception or captures another continuation, it will see <tt>k</tt>, not the current continuation.
</p>
</li>
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<h2 id="head-a4bc8bf5caf54b18cea9f58e83dd4acb488deb17">Also see</h2>
<ul>
<li>
<p>
<a href="MLtonContIsolateImplementation">MLtonContIsolateImplementation</a>
</p>
</li>
</ul>
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<p>
<hr>
Last edited on 2008-05-10 11:52:41 by <span title="c-71-57-91-146.hsd1.il.comcast.net"><a href="MatthewFluet">MatthewFluet</a></span>.
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