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authorKartik K. Agaram <vc@akkartik.com>2016-03-26 23:59:59 -0700
committerKartik K. Agaram <vc@akkartik.com>2016-03-27 17:43:41 -0700
commita654e4ecace2d506d1b10f1dde2c287ebe84ef37 (patch)
tree1e34a3ad99a56e32bdf9ee03ecfe7d339e7942ae /html/074list.mu.html
parent859f35fbe2f6a78157b875e12eb7dc8cd95c1152 (diff)
downloadmu-a654e4ecace2d506d1b10f1dde2c287ebe84ef37.tar.gz
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+<!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 - 074list.mu</title>
+<meta name="Generator" content="Vim/7.4">
+<meta name="plugin-version" content="vim7.4_v2">
+<meta name="syntax" content="none">
+<meta name="settings" content="use_css,pre_wrap,no_foldcolumn,expand_tabs,prevent_copy=">
+<meta name="colorscheme" content="minimal">
+<style type="text/css">
+<!--
+pre { white-space: pre-wrap; font-family: monospace; color: #eeeeee; background-color: #080808; }
+body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color: #080808; }
+* { font-size: 12pt; font-size: 1em; }
+.muRecipe { color: #ff8700; }
+.muData { color: #ffff00; }
+.muScenario { color: #00af00; }
+.Delimiter { color: #800080; }
+.Comment { color: #9090ff; }
+.Constant { color: #00a0a0; }
+.Special { color: #c00000; }
+.muControl { color: #c0a020; }
+-->
+</style>
+
+<script type='text/javascript'>
+<!--
+
+-->
+</script>
+</head>
+<body>
+<pre id='vimCodeElement'>
+<span class="Comment"># A list links up multiple objects together to make them easier to manage.</span>
+<span class="Comment">#</span>
+<span class="Comment"># The objects must be of the same type. If you want to store multiple types in</span>
+<span class="Comment"># a single list, use an exclusive-container.</span>
+
+<span class="muData">container</span> list:_elem [
+  value:_elem
+  next:address:shared:list:_elem
+]
+
+<span class="muRecipe">def</span> push x:_elem, in:address:shared:list:_elem<span class="muRecipe"> -&gt; </span>in:address:shared:list:_elem [
+  <span class="Constant">local-scope</span>
+  <span class="Constant">load-ingredients</span>
+  result:address:shared:list:_elem<span class="Special"> &lt;- </span>new <span class="Delimiter">{</span>(list _elem): type<span class="Delimiter">}</span>
+  val:address:_elem<span class="Special"> &lt;- </span>get-address *result, <span class="Constant">value:offset</span>
+  *val<span class="Special"> &lt;- </span>copy x
+  next:address:address:shared:list:_elem<span class="Special"> &lt;- </span>get-address *result, <span class="Constant">next:offset</span>
+  *next<span class="Special"> &lt;- </span>copy in
+  <span class="muControl">return</span> result  <span class="Comment"># needed explicitly because we need to replace 'in' with 'result'</span>
+]
+
+<span class="muRecipe">def</span> first in:address:shared:list:_elem<span class="muRecipe"> -&gt; </span>result:_elem [
+  <span class="Constant">local-scope</span>
+  <span class="Constant">load-ingredients</span>
+  result<span class="Special"> &lt;- </span>get *in, <span class="Constant">value:offset</span>
+]
+
+<span class="muRecipe">def</span> rest in:address:shared:list:_elem<span class="muRecipe"> -&gt; </span>result:address:shared:list:_elem/contained-in:in [
+  <span class="Constant">local-scope</span>
+  <span class="Constant">load-ingredients</span>
+  result<span class="Special"> &lt;- </span>get *in, <span class="Constant">next:offset</span>
+]
+
+<span class="muScenario">scenario</span> list-handling [
+  run [
+    <span class="Constant">1</span>:address:shared:list:number<span class="Special"> &lt;- </span>push <span class="Constant">3</span>, <span class="Constant">0</span>
+    <span class="Constant">1</span>:address:shared:list:number<span class="Special"> &lt;- </span>push <span class="Constant">4</span>, <span class="Constant">1</span>:address:shared:list:number
+    <span class="Constant">1</span>:address:shared:list:number<span class="Special"> &lt;- </span>push <span class="Constant">5</span>, <span class="Constant">1</span>:address:shared:list:number
+    <span class="Constant">2</span>:number<span class="Special"> &lt;- </span>first <span class="Constant">1</span>:address:shared:list:number
+    <span class="Constant">1</span>:address:shared:list:number<span class="Special"> &lt;- </span>rest <span class="Constant">1</span>:address:shared:list:number
+    <span class="Constant">3</span>:number<span class="Special"> &lt;- </span>first <span class="Constant">1</span>:address:shared:list:number
+    <span class="Constant">1</span>:address:shared:list:number<span class="Special"> &lt;- </span>rest <span class="Constant">1</span>:address:shared:list:number
+    <span class="Constant">4</span>:number<span class="Special"> &lt;- </span>first <span class="Constant">1</span>:address:shared:list:number
+    <span class="Constant">1</span>:address:shared:list:number<span class="Special"> &lt;- </span>rest <span class="Constant">1</span>:address:shared:list:number
+  ]
+  memory-should-contain [
+    <span class="Constant">1</span><span class="Special"> &lt;- </span><span class="Constant">0</span>  <span class="Comment"># empty to empty, dust to dust..</span>
+    <span class="Constant">2</span><span class="Special"> &lt;- </span><span class="Constant">5</span>
+    <span class="Constant">3</span><span class="Special"> &lt;- </span><span class="Constant">4</span>
+    <span class="Constant">4</span><span class="Special"> &lt;- </span><span class="Constant">3</span>
+  ]
+]
+
+<span class="muRecipe">def</span> to-text in:address:shared:list:_elem<span class="muRecipe"> -&gt; </span>result:address:shared:array:character [
+  <span class="Constant">local-scope</span>
+  <span class="Constant">load-ingredients</span>
+  buf:address:shared:buffer<span class="Special"> &lt;- </span>new-buffer <span class="Constant">80</span>
+  buf<span class="Special"> &lt;- </span>to-buffer in, buf
+  result<span class="Special"> &lt;- </span>buffer-to-array buf
+]
+
+<span class="Comment"># variant of 'to-text' which stops printing after a few elements (and so is robust to cycles)</span>
+<span class="muRecipe">def</span> to-text-line in:address:shared:list:_elem<span class="muRecipe"> -&gt; </span>result:address:shared:array:character [
+  <span class="Constant">local-scope</span>
+  <span class="Constant">load-ingredients</span>
+  buf:address:shared:buffer<span class="Special"> &lt;- </span>new-buffer <span class="Constant">80</span>
+  buf<span class="Special"> &lt;- </span>to-buffer in, buf, <span class="Constant">6</span>  <span class="Comment"># max elements to display</span>
+  result<span class="Special"> &lt;- </span>buffer-to-array buf
+]
+
+<span class="muRecipe">def</span> to-buffer in:address:shared:list:_elem, buf:address:shared:buffer<span class="muRecipe"> -&gt; </span>buf:address:shared:buffer [
+  <span class="Constant">local-scope</span>
+  <span class="Constant">load-ingredients</span>
+  <span class="Delimiter">{</span>
+    <span class="muControl">break-if</span> in
+    buf<span class="Special"> &lt;- </span>append buf, <span class="Constant">48/0</span>
+    <span class="muControl">return</span>
+  <span class="Delimiter">}</span>
+  <span class="Comment"># append in.value to buf</span>
+  val:_elem<span class="Special"> &lt;- </span>get *in, <span class="Constant">value:offset</span>
+  buf<span class="Special"> &lt;- </span>append buf, val
+  <span class="Comment"># now prepare next</span>
+  next:address:shared:list:_elem<span class="Special"> &lt;- </span>rest in
+  nextn:number<span class="Special"> &lt;- </span>copy next
+  <span class="muControl">return-unless</span> next
+  buf<span class="Special"> &lt;- </span>append buf, <span class="Constant">[ -&gt; ]</span>
+  <span class="Comment"># and recurse</span>
+  remaining:number, optional-ingredient-found?:boolean<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
+  <span class="Delimiter">{</span>
+    <span class="muControl">break-if</span> optional-ingredient-found?
+    <span class="Comment"># unlimited recursion</span>
+    buf<span class="Special"> &lt;- </span>to-buffer next, buf
+    <span class="muControl">return</span>
+  <span class="Delimiter">}</span>
+  <span class="Delimiter">{</span>
+    <span class="muControl">break-unless</span> remaining
+    <span class="Comment"># limited recursion</span>
+    remaining<span class="Special"> &lt;- </span>subtract remaining, <span class="Constant">1</span>
+    buf<span class="Special"> &lt;- </span>to-buffer next, buf, remaining
+    <span class="muControl">return</span>
+  <span class="Delimiter">}</span>
+  <span class="Comment"># past recursion depth; insert ellipses and stop</span>
+  append buf, <span class="Constant">[...]</span>
+]
+</pre>
+</body>
+</html>
+<!-- vim: set foldmethod=manual : -->