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<pre class=code>
<B><FONT COLOR="#0000FF">signature</FONT></B> MLTON_EXN =
   <B><FONT COLOR="#0000FF">sig</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> addExnMessager: (exn -&gt; string option) -&gt; unit
      <B><FONT COLOR="#A020F0">val</FONT></B> history: exn -&gt; string list

      <B><FONT COLOR="#A020F0">val</FONT></B> defaultTopLevelHandler: exn -&gt; 'a
      <B><FONT COLOR="#A020F0">val</FONT></B> getTopLevelHandler: unit -&gt; (exn -&gt; unit)
      <B><FONT COLOR="#A020F0">val</FONT></B> setTopLevelHandler: (exn -&gt; unit) -&gt; unit
      <B><FONT COLOR="#A020F0">val</FONT></B> topLevelHandler: exn -&gt; 'a
   <B><FONT COLOR="#0000FF">end</FONT></B>
</PRE>
<p>
 
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    <li>
<p>
 <tt>addExnMessager&nbsp;f</tt>  <br>
adds <tt>f</tt> as a pretty-printer to be used by  <tt>General.exnMessage</tt> for converting exceptions to strings.  Messagers are tried in order from most recently added to least  recently added. 
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    <li class="gap">
<p>
 <tt>history&nbsp;e</tt>  <br>
returns call stack at the point that <tt>e</tt> was first raised.  Each  element of the list is a file position.  The elements are in reverse  chronological order, i.e. the function called last is at the front of  the list. 
</p>
<p>
 <tt>history&nbsp;e</tt> will return <tt>[]</tt> unless the program is compiled  with <tt>-const&nbsp;'Exn.keepHistory&nbsp;true'</tt>. 
</p>
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    <li class="gap">
<p>
 <tt>defaultTopLevelHandler&nbsp;e</tt>  <br>
function that behaves as the default top level handler;  that is, print out the unhandled exception message for <tt>e</tt> and  exit. 
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    <li class="gap">
<p>
 <tt>getTopLevelHandler&nbsp;()</tt>  <br>
get the top level handler. 
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</li>
    <li class="gap">
<p>
 <tt>setTopLevelHandler&nbsp;f</tt>  <br>
set the top level handler to the function <tt>f</tt>.  The function  <tt>f</tt> should not raise an exception or return normally. 
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</li>
    <li class="gap">
<p>
 <tt>topLevelHandler&nbsp;e</tt>  <br>
behaves as if the top level handler received the exception <tt>e</tt>. 
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</li>
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<p>
<hr>
Last edited on 2007-08-23 03:43:53 by <span title="c-71-57-91-146.hsd1.il.comcast.net"><a href="MatthewFluet">MatthewFluet</a></span>.
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