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<!DOCTYPE html>  <html> <head>   <title>repl.coffee</title>   <meta http-equiv="content-type" content="text/html; charset=UTF-8">   <link rel="stylesheet" media="all" href="docco.css" /> </head> <body>   <div id="container">     <div id="background"></div>            <div id="jump_to">         Jump To &hellip;         <div id="jump_wrapper">           <div id="jump_page">                                           <a class="source" href="browser.html">                 browser.coffee               </a>                                           <a class="source" href="cake.html">                 cake.coffee               </a>                                           <a class="source" href="coffee-script.html">                 coffee-script.coffee               </a>                                           <a class="source" href="command.html">                 command.coffee               </a>                                           <a class="source" href="grammar.html">                 grammar.coffee               </a>                                           <a class="source" href="helpers.html">                 helpers.coffee               </a>                                           <a class="source" href="index.html">                 index.coffee               </a>                                           <a class="source" href="lexer.html">                 lexer.coffee               </a>                                           <a class="source" href="nodes.html">                 nodes.coffee               </a>                                           <a class="source" href="optparse.html">                 optparse.coffee               </a>                                           <a class="source" href="repl.html">                 repl.coffee               </a>                                           <a class="source" href="rewriter.html">                 rewriter.coffee               </a>                                           <a class="source" href="scope.html">                 scope.coffee               </a>                        </div>         </div>       </div>          <table cellpadding="0" cellspacing="0">       <thead>         <tr>           <th class="docs">             <h1>               repl.coffee             </h1>           </th>           <th class="code">           </th>         </tr>       </thead>       <tbody>                               <tr id="section-1">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-1">&#182;</a>               </div>               <p>A very simple Read-Eval-Print-Loop. Compiles one line at a time to JavaScript
and evaluates it. Good for simple tests, or poking around the <strong>Node.js</strong> API.
Using it looks like this:</p>

<pre><code>coffee&gt; console.log "#{num} bottles of beer" for num in [99..1]
</code></pre>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-2">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-2">&#182;</a>               </div>               <p>Start by opening up <code>stdin</code> and <code>stdout</code>.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">stdin = </span><span class="nx">process</span><span class="p">.</span><span class="nx">openStdin</span><span class="p">()</span>
<span class="nv">stdout = </span><span class="nx">process</span><span class="p">.</span><span class="nx">stdout</span></pre></div>             </td>           </tr>                               <tr id="section-3">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-3">&#182;</a>               </div>               <p>Require the <strong>coffee-script</strong> module to get access to the compiler.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">CoffeeScript = </span><span class="nx">require</span> <span class="s">&#39;./coffee-script&#39;</span>
<span class="nv">readline     = </span><span class="nx">require</span> <span class="s">&#39;readline&#39;</span>
<span class="p">{</span><span class="nx">inspect</span><span class="p">}</span>    <span class="o">=</span> <span class="nx">require</span> <span class="s">&#39;util&#39;</span>
<span class="p">{</span><span class="nx">Script</span><span class="p">}</span>     <span class="o">=</span> <span class="nx">require</span> <span class="s">&#39;vm&#39;</span>
<span class="nv">Module       = </span><span class="nx">require</span> <span class="s">&#39;module&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-4">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-4">&#182;</a>               </div>               <p>REPL Setup</p>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-5">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-5">&#182;</a>               </div>               <p>Config</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">REPL_PROMPT = </span><span class="s">&#39;coffee&gt; &#39;</span>
<span class="nv">REPL_PROMPT_MULTILINE = </span><span class="s">&#39;------&gt; &#39;</span>
<span class="nv">REPL_PROMPT_CONTINUATION = </span><span class="s">&#39;......&gt; &#39;</span>
<span class="nv">enableColours = </span><span class="kc">no</span>
<span class="k">unless</span> <span class="nx">process</span><span class="p">.</span><span class="nx">platform</span> <span class="o">is</span> <span class="s">&#39;win32&#39;</span>
  <span class="nv">enableColours = </span><span class="o">not</span> <span class="nx">process</span><span class="p">.</span><span class="nx">env</span><span class="p">.</span><span class="nx">NODE_DISABLE_COLORS</span></pre></div>             </td>           </tr>                               <tr id="section-6">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-6">&#182;</a>               </div>               <p>Log an error.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">error = </span><span class="nf">(err) -&gt;</span>
  <span class="nx">stdout</span><span class="p">.</span><span class="nx">write</span> <span class="p">(</span><span class="nx">err</span><span class="p">.</span><span class="nx">stack</span> <span class="o">or</span> <span class="nx">err</span><span class="p">.</span><span class="nx">toString</span><span class="p">())</span> <span class="o">+</span> <span class="s">&#39;\n&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-7">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-7">&#182;</a>               </div>               <h1>Autocompletion</h1>             </td>             <td class="code">               <div class="highlight"><pre></pre></div>             </td>           </tr>                               <tr id="section-8">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-8">&#182;</a>               </div>               <p>Regexes to match complete-able bits of text.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">ACCESSOR  = </span><span class="sr">/\s*([\w\.]+)(?:\.(\w*))$/</span>
<span class="nv">SIMPLEVAR = </span><span class="sr">/(\w+)$/i</span></pre></div>             </td>           </tr>                               <tr id="section-9">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-9">&#182;</a>               </div>               <p>Returns a list of completions, and the completed text.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">autocomplete = </span><span class="nf">(text) -&gt;</span>
  <span class="nx">completeAttribute</span><span class="p">(</span><span class="nx">text</span><span class="p">)</span> <span class="o">or</span> <span class="nx">completeVariable</span><span class="p">(</span><span class="nx">text</span><span class="p">)</span> <span class="o">or</span> <span class="p">[[],</span> <span class="nx">text</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-10">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-10">&#182;</a>               </div>               <p>Attempt to autocomplete a chained dotted attribute: <code>one.two.three</code>.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">completeAttribute = </span><span class="nf">(text) -&gt;</span>
  <span class="k">if</span> <span class="nv">match = </span><span class="nx">text</span><span class="p">.</span><span class="nx">match</span> <span class="nx">ACCESSOR</span>
    <span class="p">[</span><span class="nx">all</span><span class="p">,</span> <span class="nx">obj</span><span class="p">,</span> <span class="nx">prefix</span><span class="p">]</span> <span class="o">=</span> <span class="nx">match</span>
    <span class="k">try</span> <span class="nv">obj = </span><span class="nx">Script</span><span class="p">.</span><span class="nx">runInThisContext</span> <span class="nx">obj</span>
    <span class="k">catch</span> <span class="nx">e</span>
      <span class="k">return</span>
    <span class="k">return</span> <span class="k">unless</span> <span class="nx">obj</span><span class="o">?</span>
    <span class="nv">obj = </span><span class="nb">Object</span> <span class="nx">obj</span>
    <span class="nv">candidates = </span><span class="nb">Object</span><span class="p">.</span><span class="nx">getOwnPropertyNames</span> <span class="nx">obj</span>
    <span class="k">while</span> <span class="nv">obj = </span><span class="nb">Object</span><span class="p">.</span><span class="nx">getPrototypeOf</span> <span class="nx">obj</span>
      <span class="k">for</span> <span class="nx">key</span> <span class="k">in</span> <span class="nb">Object</span><span class="p">.</span><span class="nx">getOwnPropertyNames</span> <span class="nx">obj</span> <span class="k">when</span> <span class="nx">key</span> <span class="o">not</span> <span class="k">in</span> <span class="nx">candidates</span>
        <span class="nx">candidates</span><span class="p">.</span><span class="nx">push</span> <span class="nx">key</span>
    <span class="nv">completions = </span><span class="nx">getCompletions</span> <span class="nx">prefix</span><span class="p">,</span> <span class="nx">candidates</span>
    <span class="p">[</span><span class="nx">completions</span><span class="p">,</span> <span class="nx">prefix</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-11">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-11">&#182;</a>               </div>               <p>Attempt to autocomplete an in-scope free variable: <code>one</code>.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">completeVariable = </span><span class="nf">(text) -&gt;</span>
  <span class="nv">free = </span><span class="nx">text</span><span class="p">.</span><span class="nx">match</span><span class="p">(</span><span class="nx">SIMPLEVAR</span><span class="p">)</span><span class="o">?</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
  <span class="nv">free = </span><span class="s">&quot;&quot;</span> <span class="k">if</span> <span class="nx">text</span> <span class="o">is</span> <span class="s">&quot;&quot;</span>
  <span class="k">if</span> <span class="nx">free</span><span class="o">?</span>
    <span class="nv">vars = </span><span class="nx">Script</span><span class="p">.</span><span class="nx">runInThisContext</span> <span class="s">&#39;Object.getOwnPropertyNames(Object(this))&#39;</span>
    <span class="nv">keywords = </span><span class="p">(</span><span class="nx">r</span> <span class="k">for</span> <span class="nx">r</span> <span class="k">in</span> <span class="nx">CoffeeScript</span><span class="p">.</span><span class="nx">RESERVED</span> <span class="k">when</span> <span class="nx">r</span><span class="p">[..</span><span class="mi">1</span><span class="p">]</span> <span class="o">isnt</span> <span class="s">&#39;__&#39;</span><span class="p">)</span>
    <span class="nv">candidates = </span><span class="nx">vars</span>
    <span class="k">for</span> <span class="nx">key</span> <span class="k">in</span> <span class="nx">keywords</span> <span class="k">when</span> <span class="nx">key</span> <span class="o">not</span> <span class="k">in</span> <span class="nx">candidates</span>
      <span class="nx">candidates</span><span class="p">.</span><span class="nx">push</span> <span class="nx">key</span>
    <span class="nv">completions = </span><span class="nx">getCompletions</span> <span class="nx">free</span><span class="p">,</span> <span class="nx">candidates</span>
    <span class="p">[</span><span class="nx">completions</span><span class="p">,</span> <span class="nx">free</span><span class="p">]</span></pre></div>             </td>           </tr>                               <tr id="section-12">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-12">&#182;</a>               </div>               <p>Return elements of candidates for which <code>prefix</code> is a prefix.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">getCompletions = </span><span class="nf">(prefix, candidates) -&gt;</span>
  <span class="nx">el</span> <span class="k">for</span> <span class="nx">el</span> <span class="k">in</span> <span class="nx">candidates</span> <span class="k">when</span> <span class="mi">0</span> <span class="o">is</span> <span class="nx">el</span><span class="p">.</span><span class="nx">indexOf</span> <span class="nx">prefix</span></pre></div>             </td>           </tr>                               <tr id="section-13">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-13">&#182;</a>               </div>               <p>Make sure that uncaught exceptions don't kill the REPL.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nx">process</span><span class="p">.</span><span class="nx">on</span> <span class="s">&#39;uncaughtException&#39;</span><span class="p">,</span> <span class="nx">error</span></pre></div>             </td>           </tr>                               <tr id="section-14">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-14">&#182;</a>               </div>               <p>The current backlog of multi-line code.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">backlog = </span><span class="s">&#39;&#39;</span></pre></div>             </td>           </tr>                               <tr id="section-15">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-15">&#182;</a>               </div>               <p>The main REPL function. <strong>run</strong> is called every time a line of code is entered.
Attempt to evaluate the command. If there's an exception, print it out instead
of exiting.</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nv">run = </span><span class="nf">(buffer) -&gt;</span></pre></div>             </td>           </tr>                               <tr id="section-16">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-16">&#182;</a>               </div>               <p>remove single-line comments</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">buffer = </span><span class="nx">buffer</span><span class="p">.</span><span class="nx">replace</span> <span class="sr">/(^|[\r\n]+)(\s*)##?(?:[^#\r\n][^\r\n]*|)($|[\r\n])/</span><span class="p">,</span> <span class="s">&quot;$1$2$3&quot;</span></pre></div>             </td>           </tr>                               <tr id="section-17">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-17">&#182;</a>               </div>               <p>remove trailing newlines</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">buffer = </span><span class="nx">buffer</span><span class="p">.</span><span class="nx">replace</span> <span class="sr">/[\r\n]+$/</span><span class="p">,</span> <span class="s">&quot;&quot;</span>
  <span class="k">if</span> <span class="nx">multilineMode</span>
    <span class="nx">backlog</span> <span class="o">+=</span> <span class="s">&quot;</span><span class="si">#{</span><span class="nx">buffer</span><span class="si">}</span><span class="s">\n&quot;</span>
    <span class="nx">repl</span><span class="p">.</span><span class="nx">setPrompt</span> <span class="nx">REPL_PROMPT_CONTINUATION</span>
    <span class="nx">repl</span><span class="p">.</span><span class="nx">prompt</span><span class="p">()</span>
    <span class="k">return</span>
  <span class="k">if</span> <span class="o">!</span><span class="nx">buffer</span><span class="p">.</span><span class="nx">toString</span><span class="p">().</span><span class="nx">trim</span><span class="p">()</span> <span class="o">and</span> <span class="o">!</span><span class="nx">backlog</span>
    <span class="nx">repl</span><span class="p">.</span><span class="nx">prompt</span><span class="p">()</span>
    <span class="k">return</span>
  <span class="nv">code = </span><span class="nx">backlog</span> <span class="o">+=</span> <span class="nx">buffer</span>
  <span class="k">if</span> <span class="nx">code</span><span class="p">[</span><span class="nx">code</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="o">is</span> <span class="s">&#39;\\&#39;</span>
    <span class="nv">backlog = </span><span class="s">&quot;</span><span class="si">#{</span><span class="nx">backlog</span><span class="p">[...</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span><span class="si">}</span><span class="s">\n&quot;</span>
    <span class="nx">repl</span><span class="p">.</span><span class="nx">setPrompt</span> <span class="nx">REPL_PROMPT_CONTINUATION</span>
    <span class="nx">repl</span><span class="p">.</span><span class="nx">prompt</span><span class="p">()</span>
    <span class="k">return</span>
  <span class="nx">repl</span><span class="p">.</span><span class="nx">setPrompt</span> <span class="nx">REPL_PROMPT</span>
  <span class="nv">backlog = </span><span class="s">&#39;&#39;</span>
  <span class="k">try</span>
    <span class="nv">_ = </span><span class="nx">global</span><span class="p">.</span><span class="nx">_</span>
    <span class="nv">returnValue = </span><span class="nx">CoffeeScript</span><span class="p">.</span><span class="nb">eval</span> <span class="s">&quot;_=(</span><span class="si">#{</span><span class="nx">code</span><span class="si">}</span><span class="s">\n)&quot;</span><span class="p">,</span> <span class="p">{</span>
      <span class="nv">filename: </span><span class="s">&#39;repl&#39;</span>
      <span class="nv">modulename: </span><span class="s">&#39;repl&#39;</span>
    <span class="p">}</span>
    <span class="k">if</span> <span class="nx">returnValue</span> <span class="o">is</span> <span class="kc">undefined</span>
      <span class="nv">global._ = </span><span class="nx">_</span>
    <span class="nx">repl</span><span class="p">.</span><span class="nx">output</span><span class="p">.</span><span class="nx">write</span> <span class="s">&quot;</span><span class="si">#{</span><span class="nx">inspect</span> <span class="nx">returnValue</span><span class="p">,</span> <span class="kc">no</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="nx">enableColours</span><span class="si">}</span><span class="s">\n&quot;</span>
  <span class="k">catch</span> <span class="nx">err</span>
    <span class="nx">error</span> <span class="nx">err</span>
  <span class="nx">repl</span><span class="p">.</span><span class="nx">prompt</span><span class="p">()</span>

<span class="k">if</span> <span class="nx">stdin</span><span class="p">.</span><span class="nx">readable</span> <span class="o">and</span> <span class="nx">stdin</span><span class="p">.</span><span class="nx">isRaw</span></pre></div>             </td>           </tr>                               <tr id="section-18">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-18">&#182;</a>               </div>               <p>handle piped input</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="nv">pipedInput = </span><span class="s">&#39;&#39;</span>
  <span class="nv">repl =</span>
    <span class="nv">prompt: </span><span class="nf">-&gt;</span> <span class="nx">stdout</span><span class="p">.</span><span class="nx">write</span> <span class="nx">@_prompt</span>
    <span class="nv">setPrompt: </span><span class="nf">(p) -&gt;</span> <span class="vi">@_prompt = </span><span class="nx">p</span>
    <span class="nv">input: </span><span class="nx">stdin</span>
    <span class="nv">output: </span><span class="nx">stdout</span>
    <span class="kc">on</span><span class="o">:</span> <span class="nf">-&gt;</span>
  <span class="nx">stdin</span><span class="p">.</span><span class="nx">on</span> <span class="s">&#39;data&#39;</span><span class="p">,</span> <span class="nf">(chunk) -&gt;</span>
    <span class="nx">pipedInput</span> <span class="o">+=</span> <span class="nx">chunk</span>
    <span class="k">return</span> <span class="k">unless</span> <span class="sr">/\n/</span><span class="p">.</span><span class="nx">test</span> <span class="nx">pipedInput</span>
    <span class="nv">lines = </span><span class="nx">pipedInput</span><span class="p">.</span><span class="nx">split</span> <span class="s">&quot;\n&quot;</span>
    <span class="nv">pipedInput = </span><span class="nx">lines</span><span class="p">[</span><span class="nx">lines</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span>
    <span class="k">for</span> <span class="nx">line</span> <span class="k">in</span> <span class="nx">lines</span><span class="p">[...</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> <span class="k">when</span> <span class="nx">line</span>
      <span class="nx">stdout</span><span class="p">.</span><span class="nx">write</span> <span class="s">&quot;</span><span class="si">#{</span><span class="nx">line</span><span class="si">}</span><span class="s">\n&quot;</span>
      <span class="nx">run</span> <span class="nx">line</span>
    <span class="k">return</span>
  <span class="nx">stdin</span><span class="p">.</span><span class="nx">on</span> <span class="s">&#39;end&#39;</span><span class="p">,</span> <span class="nf">-&gt;</span>
    <span class="k">for</span> <span class="nx">line</span> <span class="k">in</span> <span class="nx">pipedInput</span><span class="p">.</span><span class="nx">trim</span><span class="p">().</span><span class="nx">split</span> <span class="s">&quot;\n&quot;</span> <span class="k">when</span> <span class="nx">line</span>
      <span class="nx">stdout</span><span class="p">.</span><span class="nx">write</span> <span class="s">&quot;</span><span class="si">#{</span><span class="nx">line</span><span class="si">}</span><span class="s">\n&quot;</span>
      <span class="nx">run</span> <span class="nx">line</span>
    <span class="nx">stdout</span><span class="p">.</span><span class="nx">write</span> <span class="s">&#39;\n&#39;</span>
    <span class="nx">process</span><span class="p">.</span><span class="nx">exit</span> <span class="mi">0</span>
<span class="k">else</span></pre></div>             </td>           </tr>                               <tr id="section-19">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-19">&#182;</a>               </div>               <p>Create the REPL by listening to <strong>stdin</strong>.</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="k">if</span> <span class="nx">readline</span><span class="p">.</span><span class="nx">createInterface</span><span class="p">.</span><span class="nx">length</span> <span class="o">&lt;</span> <span class="mi">3</span>
    <span class="nv">repl = </span><span class="nx">readline</span><span class="p">.</span><span class="nx">createInterface</span> <span class="nx">stdin</span><span class="p">,</span> <span class="nx">autocomplete</span>
    <span class="nx">stdin</span><span class="p">.</span><span class="nx">on</span> <span class="s">&#39;data&#39;</span><span class="p">,</span> <span class="nf">(buffer) -&gt;</span> <span class="nx">repl</span><span class="p">.</span><span class="nx">write</span> <span class="nx">buffer</span>
  <span class="k">else</span>
    <span class="nv">repl = </span><span class="nx">readline</span><span class="p">.</span><span class="nx">createInterface</span> <span class="nx">stdin</span><span class="p">,</span> <span class="nx">stdout</span><span class="p">,</span> <span class="nx">autocomplete</span>

<span class="nv">multilineMode = </span><span class="kc">off</span></pre></div>             </td>           </tr>                               <tr id="section-20">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-20">&#182;</a>               </div>               <p>Handle multi-line mode switch</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nx">repl</span><span class="p">.</span><span class="nx">input</span><span class="p">.</span><span class="nx">on</span> <span class="s">&#39;keypress&#39;</span><span class="p">,</span> <span class="nf">(char, key) -&gt;</span></pre></div>             </td>           </tr>                               <tr id="section-21">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-21">&#182;</a>               </div>               <p>test for Ctrl-v</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="k">return</span> <span class="k">unless</span> <span class="nx">key</span> <span class="o">and</span> <span class="nx">key</span><span class="p">.</span><span class="nx">ctrl</span> <span class="o">and</span> <span class="o">not</span> <span class="nx">key</span><span class="p">.</span><span class="nx">meta</span> <span class="o">and</span> <span class="o">not</span> <span class="nx">key</span><span class="p">.</span><span class="nx">shift</span> <span class="o">and</span> <span class="nx">key</span><span class="p">.</span><span class="nx">name</span> <span class="o">is</span> <span class="s">&#39;v&#39;</span>
  <span class="nv">cursorPos = </span><span class="nx">repl</span><span class="p">.</span><span class="nx">cursor</span>
  <span class="nx">repl</span><span class="p">.</span><span class="nx">output</span><span class="p">.</span><span class="nx">cursorTo</span> <span class="mi">0</span>
  <span class="nx">repl</span><span class="p">.</span><span class="nx">output</span><span class="p">.</span><span class="nx">clearLine</span> <span class="mi">1</span>
  <span class="nv">multilineMode = </span><span class="o">not</span> <span class="nx">multilineMode</span>
  <span class="nx">repl</span><span class="p">.</span><span class="nx">_line</span><span class="p">()</span> <span class="k">if</span> <span class="o">not</span> <span class="nx">multilineMode</span> <span class="o">and</span> <span class="nx">backlog</span>
  <span class="nv">backlog = </span><span class="s">&#39;&#39;</span>
  <span class="nx">repl</span><span class="p">.</span><span class="nx">setPrompt</span> <span class="p">(</span><span class="nv">newPrompt = </span><span class="k">if</span> <span class="nx">multilineMode</span> <span class="k">then</span> <span class="nx">REPL_PROMPT_MULTILINE</span> <span class="k">else</span> <span class="nx">REPL_PROMPT</span><span class="p">)</span>
  <span class="nx">repl</span><span class="p">.</span><span class="nx">prompt</span><span class="p">()</span>
  <span class="nx">repl</span><span class="p">.</span><span class="nx">output</span><span class="p">.</span><span class="nx">cursorTo</span> <span class="nx">newPrompt</span><span class="p">.</span><span class="nx">length</span> <span class="o">+</span> <span class="p">(</span><span class="nv">repl.cursor = </span><span class="nx">cursorPos</span><span class="p">)</span></pre></div>             </td>           </tr>                               <tr id="section-22">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-22">&#182;</a>               </div>               <p>Handle Ctrl-d press at end of last line in multiline mode</p>             </td>             <td class="code">               <div class="highlight"><pre><span class="nx">repl</span><span class="p">.</span><span class="nx">input</span><span class="p">.</span><span class="nx">on</span> <span class="s">&#39;keypress&#39;</span><span class="p">,</span> <span class="nf">(char, key) -&gt;</span>
  <span class="k">return</span> <span class="k">unless</span> <span class="nx">multilineMode</span> <span class="o">and</span> <span class="nx">repl</span><span class="p">.</span><span class="nx">line</span></pre></div>             </td>           </tr>                               <tr id="section-23">             <td class="docs">               <div class="pilwrap">                 <a class="pilcrow" href="#section-23">&#182;</a>               </div>               <p>test for Ctrl-d</p>             </td>             <td class="code">               <div class="highlight"><pre>  <span class="k">return</span> <span class="k">unless</span> <span class="nx">key</span> <span class="o">and</span> <span class="nx">key</span><span class="p">.</span><span class="nx">ctrl</span> <span class="o">and</span> <span class="o">not</span> <span class="nx">key</span><span class="p">.</span><span class="nx">meta</span> <span class="o">and</span> <span class="o">not</span> <span class="nx">key</span><span class="p">.</span><span class="nx">shift</span> <span class="o">and</span> <span class="nx">key</span><span class="p">.</span><span class="nx">name</span> <span class="o">is</span> <span class="s">&#39;d&#39;</span>
  <span class="nv">multilineMode = </span><span class="kc">off</span>
  <span class="nx">repl</span><span class="p">.</span><span class="nx">_line</span><span class="p">()</span>

<span class="nx">repl</span><span class="p">.</span><span class="nx">on</span> <span class="s">&#39;attemptClose&#39;</span><span class="p">,</span> <span class="nf">-&gt;</span>
  <span class="k">if</span> <span class="nx">multilineMode</span>
    <span class="nv">multilineMode = </span><span class="kc">off</span>
    <span class="nx">repl</span><span class="p">.</span><span class="nx">output</span><span class="p">.</span><span class="nx">cursorTo</span> <span class="mi">0</span>
    <span class="nx">repl</span><span class="p">.</span><span class="nx">output</span><span class="p">.</span><span class="nx">clearLine</span> <span class="mi">1</span>
    <span class="nx">repl</span><span class="p">.</span><span class="nx">_onLine</span> <span class="nx">repl</span><span class="p">.</span><span class="nx">line</span>
    <span class="k">return</span>
  <span class="k">if</span> <span class="nx">backlog</span> <span class="o">or</span> <span class="nx">repl</span><span class="p">.</span><span class="nx">line</span>
    <span class="nv">backlog = </span><span class="s">&#39;&#39;</span>
    <span class="nv">repl.historyIndex = </span><span class="o">-</span><span class="mi">1</span>
    <span class="nx">repl</span><span class="p">.</span><span class="nx">setPrompt</span> <span class="nx">REPL_PROMPT</span>
    <span class="nx">repl</span><span class="p">.</span><span class="nx">output</span><span class="p">.</span><span class="nx">write</span> <span class="s">&#39;\n(^C again to quit)&#39;</span>
    <span class="nx">repl</span><span class="p">.</span><span class="nx">_line</span> <span class="p">(</span><span class="nv">repl.line = </span><span class="s">&#39;&#39;</span><span class="p">)</span>
  <span class="k">else</span>
    <span class="nx">repl</span><span class="p">.</span><span class="nx">close</span><span class="p">()</span>

<span class="nx">repl</span><span class="p">.</span><span class="nx">on</span> <span class="s">&#39;close&#39;</span><span class="p">,</span> <span class="nf">-&gt;</span>
  <span class="nx">repl</span><span class="p">.</span><span class="nx">output</span><span class="p">.</span><span class="nx">write</span> <span class="s">&#39;\n&#39;</span>
  <span class="nx">repl</span><span class="p">.</span><span class="nx">input</span><span class="p">.</span><span class="nx">destroy</span><span class="p">()</span>

<span class="nx">repl</span><span class="p">.</span><span class="nx">on</span> <span class="s">&#39;line&#39;</span><span class="p">,</span> <span class="nx">run</span>

<span class="nx">repl</span><span class="p">.</span><span class="nx">setPrompt</span> <span class="nx">REPL_PROMPT</span>
<span class="nx">repl</span><span class="p">.</span><span class="nx">prompt</span><span class="p">()</span>

</pre></div>             </td>           </tr>                </tbody>     </table>   </div> </body> </html>