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<pre class=code>
<B><FONT COLOR="#0000FF">signature</FONT></B> MLTON_INT_INF =
   <B><FONT COLOR="#0000FF">sig</FONT></B>
      <B><FONT COLOR="#A020F0">type</FONT></B><FONT COLOR="#228B22"><B> t

      </FONT></B><B><FONT COLOR="#A020F0">val</FONT></B> areSmall: t * t -&gt; bool
      <B><FONT COLOR="#A020F0">val</FONT></B> gcd: t * t -&gt; t
      <B><FONT COLOR="#A020F0">val</FONT></B> isSmall: t -&gt; bool
      <B><FONT COLOR="#A020F0">datatype</FONT></B><FONT COLOR="#228B22"><B> rep </FONT></B>=<FONT COLOR="#228B22"><B>
         <FONT COLOR="#B8860B">Big</FONT> <B><FONT COLOR="#A020F0">of</FONT></B> word vector
       </FONT></B>|<FONT COLOR="#228B22"><B> <FONT COLOR="#B8860B">Small</FONT> <B><FONT COLOR="#A020F0">of</FONT></B> int
      </FONT></B><B><FONT COLOR="#A020F0">val</FONT></B> rep: t -&gt; rep
   <B><FONT COLOR="#0000FF">end</FONT></B>
</PRE>
<p>
 
</p>
<p>
MLton represents an arbitrary precision integer either as an unboxed 32 bit word with the bottom bit set to 1 and the top 31 bits representing a small integer in [-2<sup>30</sup>, 2<sup>30</sup>), or as a pointer to a vector of words where the first word indicates the sign and the rest are the limbs of <a href="GnuMP">GnuMP</a> big integer. 
</p>

    <ul>

    <li>
<p>
 <tt>type&nbsp;t</tt> 
</p>
</li>

        <ul>

  the same as type <tt>IntInf.int</tt>. 
        </ul>


    <li class="gap">
<p>
 <tt>areSmall&nbsp;(a,&nbsp;b)</tt> 
</p>
</li>

        <ul>

  returns true iff both <tt>a</tt> and <tt>b</tt> are small. 
        </ul>


    <li class="gap">
<p>
 <tt>gcd&nbsp;(a,&nbsp;b)</tt> 
</p>
</li>

        <ul>

  uses the GnuMP's fast gcd implementation. 
        </ul>


    <li class="gap">
<p>
 <tt>isSmall&nbsp;a</tt> 
</p>
</li>

        <ul>

  returns true iff <tt>a</tt> is small. 
        </ul>


    <li class="gap">
<p>
 <tt>datatype&nbsp;rep</tt> 
</p>
</li>

        <ul>

  the underlying representation of an <tt>IntInf.int</tt>. 
        </ul>


    <li class="gap">
<p>
 <tt>rep&nbsp;i</tt> 
</p>
</li>

        <ul>

  returns the underlying representation of <tt>i</tt>. </ul>

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<p>
<hr>
Last edited on 2005-12-02 03:46:17 by <span title="209-6-203-188.c3-0.smr-ubr1.sbo-smr.ma.cable.rcn.com"><a href="MatthewFluet">MatthewFluet</a></span>.
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