doc/guide/localhost/MLtonVector

   1 <!DOCTYPE html>
   2 <html lang="en">
   3 <head>
   4 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
   5 <meta name="generator" content="AsciiDoc 8.6.9">
   6 <title>MLtonVector</title>
   7 <link rel="stylesheet" href="./asciidoc.css" type="text/css">
   8 <link rel="stylesheet" href="./pygments.css" type="text/css">
   9
  10
  11 <script type="text/javascript" src="./asciidoc.js"></script>
  12 <script type="text/javascript">
  13 /*<![CDATA[*/
  14 asciidoc.install();
  15 /*]]>*/
  16 </script>
  17 <link rel="stylesheet" href="./mlton.css" type="text/css">
  18 </head>
  19 <body class="article">
  20 <div id="banner">
  21 <div id="banner-home">
  22 <a href="./Home">MLton 20180207</a>
  23 </div>
  24 </div>
  25 <div id="header">
  26 <h1>MLtonVector</h1>
  27 </div>
  28 <div id="content">
  29 <div id="preamble">
  30 <div class="sectionbody">
  31 <div class="listingblock">
  32 <div class="content"><div class="highlight"><pre><span class="k">signature</span><span class="w"> </span><span class="n">MLTON_VECTOR</span><span class="w"> </span><span class="p">=</span><span class="w"></span>
  33 <span class="w">   </span><span class="k">sig</span><span class="w"></span>
  34 <span class="w">      </span><span class="k">val</span><span class="w"> </span><span class="n">create</span><span class="p">:</span><span class="w"> </span><span class="n">int</span><span class="w"> </span><span class="p">-&gt;</span><span class="w"> </span><span class="p">{</span><span class="n">done</span><span class="p">:</span><span class="w"> </span><span class="n">unit</span><span class="w"> </span><span class="p">-&gt;</span><span class="w"> </span><span class="n">&#39;a</span><span class="w"> </span><span class="n">vector</span><span class="p">,</span><span class="w"></span>
  35 <span class="w">                          </span><span class="n">sub</span><span class="p">:</span><span class="w"> </span><span class="n">int</span><span class="w"> </span><span class="p">-&gt;</span><span class="w"> </span><span class="n">&#39;a</span><span class="p">,</span><span class="w"></span>
  36 <span class="w">                          </span><span class="n">update</span><span class="p">:</span><span class="w"> </span><span class="n">int</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="n">&#39;a</span><span class="w"> </span><span class="p">-&gt;</span><span class="w"> </span><span class="n">unit</span><span class="p">}</span><span class="w"></span>
  37 <span class="w">      </span><span class="k">val</span><span class="w"> </span><span class="n">unfoldi</span><span class="p">:</span><span class="w"> </span><span class="n">int</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="n">&#39;b</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="p">(</span><span class="n">int</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="n">&#39;b</span><span class="w"> </span><span class="p">-&gt;</span><span class="w"> </span><span class="n">&#39;a</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="n">&#39;b</span><span class="p">)</span><span class="w"> </span><span class="p">-&gt;</span><span class="w"> </span><span class="n">&#39;a</span><span class="w"> </span><span class="n">vector</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="n">&#39;b</span><span class="w"></span>
  38 <span class="w">   </span><span class="k">end</span><span class="w"></span>
  39 </pre></div></div></div>
  40 <div class="ulist"><ul>
  41 <li>
  42 <p>
  43 <span class="monospaced">create n</span>
  44 </p>
  45 <div class="paragraph"><p>initiates the construction a vector <em>v</em> of length <span class="monospaced">n</span>, returning
  46 functions to manipulate the vector.  The <span class="monospaced">done</span> function may be called
  47 to return the created vector; it is an error to call <span class="monospaced">done</span> before all
  48 entries have been initialized; it is an error to call <span class="monospaced">done</span> after
  49 having called <span class="monospaced">done</span>.  The <span class="monospaced">sub</span> function may be called to return an
  50 initialized vector entry; it is not an error to call <span class="monospaced">sub</span> after
  51 having called <span class="monospaced">done</span>.  The <span class="monospaced">update</span> function may be called to
  52 initialize a vector entry; it is an error to call <span class="monospaced">update</span> after
  53 having called <span class="monospaced">done</span>.  One must initialize vector entries in order
  54 from lowest to highest; that is, before calling <span class="monospaced">update (i, x)</span>, one
  55 must have already called <span class="monospaced">update (j, x)</span> for all <span class="monospaced">j</span> in <span class="monospaced">[0, i)</span>.  The
  56 <span class="monospaced">done</span>, <span class="monospaced">sub</span>, and <span class="monospaced">update</span> functions are all constant-time
  57 operations.</p></div>
  58 </li>
  59 <li>
  60 <p>
  61 <span class="monospaced">unfoldi (n, b, f)</span>
  62 </p>
  63 <div class="paragraph"><p>constructs a vector <em>v</em> of length <span class="monospaced">n</span>, whose elements <em>v<sub>i</sub></em> are
  64 determined by the equations <em>b<sub>0</sub> = b</em> and
  65 <em>(v<sub>i</sub>, b<sub>i+1</sub>) = f (i, b<sub>i</sub>)</em>.</p></div>
  66 </li>
  67 </ul></div>
  68 </div>
  69 </div>
  70 </div>
  71 <div id="footnotes"><hr></div>
  72 <div id="footer">
  73 <div id="footer-text">
  74 </div>
  75 <div id="footer-badges">
  76 </div>
  77 </div>
  78 </body>
  79 </html>