<!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>MLtonVector - 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%;"> MLtonVector <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> <a href = "TitleIndex">Index</a> </table> <div id="content" lang="en" dir="ltr"> <pre class=code> <B><FONT COLOR="#0000FF">signature</FONT></B> MLTON_VECTOR = <B><FONT COLOR="#0000FF">sig</FONT></B> <B><FONT COLOR="#A020F0">val</FONT></B> create: int -> {done: unit -> 'a vector, sub: int -> 'a, update: int * 'a -> unit} <B><FONT COLOR="#A020F0">val</FONT></B> unfoldi: int * 'b * (int * 'b -> 'a * 'b) -> 'a vector * 'b <B><FONT COLOR="#0000FF">end</FONT></B> </PRE> <p> </p> <ul> <li> <p> <tt>create n</tt> <br> initiates the construction a vector <em>v</em> of length <tt>n</tt>, returning functions to manipulate the vector. The <tt>done</tt> function may be called to return the created vector; it is an error to call <tt>done</tt> before all entries have been initialized; it is an error to call <tt>done</tt> after having called <tt>done</tt>. The <tt>sub</tt> function may be called to return an initialized vector entry; it is not an error to call <tt>sub</tt> after having called <tt>done</tt>. The <tt>update</tt> function may be called to initialize a vector entry; it is an error to call <tt>update</tt> after having called <tt>done</tt>. One must initialize vector entries in order from lowest to highest; that is, before calling <tt>update (i, x)</tt>, one must have already called <tt>update (j, x)</tt> for all <tt>j</tt> in <tt>[0, i)</tt>. The <tt>done</tt>, <tt>sub</tt>, and <tt>update</tt> functions are all constant-time operations. </p> </li> <li class="gap"> <p> <tt>unfoldi (n, b, f)</tt> <br> constructs a vector <em>v</em> of length <tt>n</tt>, whose elements <em>v<sub>i</sub></em> are determined by the equations <em>b<sub>0</sub> = b</em> and <em>(v<sub>i</sub>, b<sub>i+1</sub>) = f (i, b<sub>i</sub>)</em>. </p> </li> </ul> </div> <p> <hr> Last edited on 2007-08-23 03:45:50 by <span title="c-71-57-91-146.hsd1.il.comcast.net"><a href="MatthewFluet">MatthewFluet</a></span>. </body></html>