about summary refs log blame commit diff stats
path: root/html/continuation5.mu.html
blob: 80b38fd9e4bcbef01f77fa3d83194b6d5096c783 (plain) (tree)
1
2
3
4
5
6
7
8
9




                                                                                          
                                         


                                                                                                               
                                                 

                       

                                                                                                 
                    
                                     
                              
                             




                              
































                                                                                 
                                                                                                                                     

                                                                                                                                                
                                                                             



                                                                                                                                                  









                                                                                                                                                               
                                                                                                                        
                                                                                   
                                                                                                                                                                      


                                                                                                                      
                                                                                                                                                                                                                                                                           

                                                                                                                       




                                                                                                                                                                          


                                                                          
                                                                                                                                                                                                                                          
                                                                                   
                                                                                   

                                                                                                                       
                                                                                                                                

                                                                                         
                                                                                                                         


                                                                                                                                                                                                                                            
                                                                          
                                                                                                                                                                                       
                                                                                                                                                                               
                                         



                                     
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Mu - continuation5.mu</title>
<meta name="Generator" content="Vim/8.0">
<meta name="plugin-version" content="vim7.4_v2">
<meta name="syntax" content="none">
<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
<meta name="colorscheme" content="minimal-light">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #c6c6c6; }
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.muControl { color: #804000; }
.muRecipe { color: #ff8700; }
.LineNr { }
.Delimiter { color: #c000c0; }
.Constant { color: #008787; }
.Special { color: #ff6060; }
.Comment { color: #005faf; }
-->
</style>

<script type='text/javascript'>
<!--

/* function to open any folds containing a jumped-to line before jumping to it */
function JumpToLine()
{
  var lineNum;
  lineNum = window.location.hash;
  lineNum = lineNum.substr(1); /* strip off '#' */

  if (lineNum.indexOf('L') == -1) {
    lineNum = 'L'+lineNum;
  }
  lineElem = document.getElementById(lineNum);
  /* Always jump to new location even if the line was hidden inside a fold, or
   * we corrected the raw number to a line ID.
   */
  if (lineElem) {
    lineElem.scrollIntoView(true);
  }
  return true;
}
if ('onhashchange' in window) {
  window.onhashchange = JumpToLine;
}

-->
</script>
</head>
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/master/continuation5.mu'>https://github.com/akkartik/mu/blob/master/continuation5.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="Comment"># Example program showing that a 'paused' continuation can be 'resumed' with</span>
<span id="L2" class="LineNr"> 2 </span><span class="Comment"># inputs.</span>
<span id="L3" class="LineNr"> 3 </span><span class="Comment">#</span>
<span id="L4" class="LineNr"> 4 </span><span class="Comment"># Print out a list of numbers, first adding 0 to the first, 1 to the second, 2</span>
<span id="L5" class="LineNr"> 5 </span><span class="Comment"># to the third, and so on.</span>
<span id="L6" class="LineNr"> 6 </span><span class="Comment">#</span>
<span id="L7" class="LineNr"> 7 </span><span class="Comment"># To run:</span>
<span id="L8" class="LineNr"> 8 </span><span class="Comment">#   $ git clone <a href="https://github.com/akkartik/mu">https://github.com/akkartik/mu</a></span>
<span id="L9" class="LineNr"> 9 </span><span class="Comment">#   $ cd mu</span>
<span id="L10" class="LineNr">10 </span><span class="Comment">#   $ ./mu continuation5.mu</span>
<span id="L11" class="LineNr">11 </span><span class="Comment">#</span>
<span id="L12" class="LineNr">12 </span><span class="Comment"># Expected output:</span>
<span id="L13" class="LineNr">13 </span><span class="Comment">#   1</span>
<span id="L14" class="LineNr">14 </span><span class="Comment">#   3</span>
<span id="L15" class="LineNr">15 </span><span class="Comment">#   5</span>
<span id="L16" class="LineNr">16 </span>
<span id="L17" class="LineNr">17 </span><span class="muRecipe">def</span> <a href='continuation5.mu.html#L17'>main</a> [
<span id="L18" class="LineNr">18 </span>  <span class="Constant">local-scope</span>
<span id="L19" class="LineNr">19 </span>  l:&amp;:<a href='064list.mu.html#L6'>list</a>:num <span class="Special">&lt;-</span> copy<span class="Constant"> null</span>
<span id="L20" class="LineNr">20 </span>  l <span class="Special">&lt;-</span> push<span class="Constant"> 3</span>, l
<span id="L21" class="LineNr">21 </span>  l <span class="Special">&lt;-</span> push<span class="Constant"> 2</span>, l
<span id="L22" class="LineNr">22 </span>  l <span class="Special">&lt;-</span> push<span class="Constant"> 1</span>, l
<span id="L23" class="LineNr">23 </span>  k:continuation, x:num, done?:bool <span class="Special">&lt;-</span> <span class="muControl">call-with-continuation-mark</span> <span class="Constant">100/mark</span>, <a href='continuation5.mu.html#L34'>create-yielder</a>, l
<span id="L24" class="LineNr">24 </span>  a:num <span class="Special">&lt;-</span> copy<span class="Constant"> 1</span>
<span id="L25" class="LineNr">25 </span>  <span class="Delimiter">{</span>
<span id="L26" class="LineNr">26 </span>    <span class="muControl">break-if</span> done?
<span id="L27" class="LineNr">27 </span>    $print x <span class="Constant">10/newline</span>
<span id="L28" class="LineNr">28 </span>    k, x:num, done?:bool <span class="Special">&lt;-</span> call k, a  <span class="Comment"># resume; x = a + next l value</span>
<span id="L29" class="LineNr">29 </span>    a <span class="Special">&lt;-</span> add a,<span class="Constant"> 1</span>
<span id="L30" class="LineNr">30 </span>   <span class="muControl"> loop</span>
<span id="L31" class="LineNr">31 </span>  <span class="Delimiter">}</span>
<span id="L32" class="LineNr">32 </span>]
<span id="L33" class="LineNr">33 </span>
<span id="L34" class="LineNr">34 </span><span class="muRecipe">def</span> <a href='continuation5.mu.html#L34'>create-yielder</a> l:&amp;:<a href='064list.mu.html#L6'>list</a>:num<span class="muRecipe"> -&gt; </span>n:num, done?:bool [
<span id="L35" class="LineNr">35 </span>  <span class="Constant">local-scope</span>
<span id="L36" class="LineNr">36 </span>  <span class="Constant">load-inputs</span>
<span id="L37" class="LineNr">37 </span>  a:num <span class="Special">&lt;-</span> copy<span class="Constant"> 0</span>
<span id="L38" class="LineNr">38 </span>  <span class="Delimiter">{</span>
<span id="L39" class="LineNr">39 </span>    done? <span class="Special">&lt;-</span> equal l,<span class="Constant"> null</span>
<span id="L40" class="LineNr">40 </span>    <span class="muControl">break-if</span> done?
<span id="L41" class="LineNr">41 </span>    n <span class="Special">&lt;-</span> first l
<span id="L42" class="LineNr">42 </span>    l <span class="Special">&lt;-</span> <a href='064list.mu.html#L24'>rest</a> l
<span id="L43" class="LineNr">43 </span>    n <span class="Special">&lt;-</span> add n, a
<span id="L44" class="LineNr">44 </span>    a <span class="Special">&lt;-</span> <span class="muControl">return-continuation-until-mark</span> <span class="Constant">100/mark</span>, n, done?  <span class="Comment"># pause/resume</span>
<span id="L45" class="LineNr">45 </span>   <span class="muControl"> loop</span>
<span id="L46" class="LineNr">46 </span>  <span class="Delimiter">}</span>
<span id="L47" class="LineNr">47 </span>  <span class="muControl">return-continuation-until-mark</span> <span class="Constant">100/mark</span>,<span class="Constant"> -1</span>, done?
<span id="L48" class="LineNr">48 </span>  assert<span class="Constant"> false</span>, <span class="Constant">[called too many times, ran out of continuations to return]</span>
<span id="L49" class="LineNr">49 </span>]
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->