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CoffeeScript 0.9.0
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Jeremy Ashkenas
parent
5f2326e911
commit
ff9af83358
23 changed files with 1188 additions and 1163 deletions
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@ -5,50 +5,50 @@ CoffeeScript into JavaScript.</p>
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<p>If included on a webpage, it will automatically sniff out, compile, and
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execute all scripts present in <code>text/coffeescript</code> tags.</p> </td> <td class="code"> <div class="highlight"><pre></pre></div> </td> </tr> <tr id="section-2"> <td class="docs"> <div class="octowrap"> <a class="octothorpe" href="#section-2">#</a> </div> <p>Set up dependencies correctly for both the server and the browser.</p> </td> <td class="code"> <div class="highlight"><pre><span class="k">if</span> <span class="nx">process</span><span class="o">?</span>
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<span class="nx">path</span> <span class="o">=</span> <span class="nx">require</span> <span class="s1">'path'</span>
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<span class="nx">Lexer</span> <span class="o">=</span> <span class="nx">require</span><span class="p">(</span><span class="s1">'./lexer'</span><span class="p">).</span><span class="nx">Lexer</span>
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<span class="nx">parser</span> <span class="o">=</span> <span class="nx">require</span><span class="p">(</span><span class="s1">'./parser'</span><span class="p">).</span><span class="nx">parser</span>
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<span class="nx">helpers</span> <span class="o">=</span> <span class="nx">require</span><span class="p">(</span><span class="s1">'./helpers'</span><span class="p">).</span><span class="nx">helpers</span>
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<span class="nv">path = </span><span class="nx">require</span> <span class="s1">'path'</span>
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<span class="nv">Lexer = </span><span class="nx">require</span><span class="p">(</span><span class="s1">'./lexer'</span><span class="p">).</span><span class="nx">Lexer</span>
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<span class="nv">parser = </span><span class="nx">require</span><span class="p">(</span><span class="s1">'./parser'</span><span class="p">).</span><span class="nx">parser</span>
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<span class="nv">helpers = </span><span class="nx">require</span><span class="p">(</span><span class="s1">'./helpers'</span><span class="p">).</span><span class="nx">helpers</span>
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<span class="nx">helpers</span><span class="p">.</span><span class="nx">extend</span> <span class="nx">global</span><span class="p">,</span> <span class="nx">require</span> <span class="s1">'./nodes'</span>
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<span class="k">if</span> <span class="nx">require</span><span class="p">.</span><span class="nx">registerExtension</span>
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<span class="nx">require</span><span class="p">.</span><span class="nx">registerExtension</span> <span class="s1">'.coffee'</span><span class="p">,</span> <span class="p">(</span><span class="nx">content</span><span class="p">)</span> <span class="o">-></span> <span class="nx">compile</span> <span class="nx">content</span>
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<span class="k">else</span>
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<span class="k">this</span><span class="p">.</span><span class="nx">exports</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">CoffeeScript</span> <span class="o">=</span> <span class="p">{}</span>
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<span class="nx">Lexer</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">Lexer</span>
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<span class="nx">parser</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">parser</span>
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<span class="nx">helpers</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">helpers</span></pre></div> </td> </tr> <tr id="section-3"> <td class="docs"> <div class="octowrap"> <a class="octothorpe" href="#section-3">#</a> </div> <p>The current CoffeeScript version number.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">exports</span><span class="p">.</span><span class="nx">VERSION</span> <span class="o">=</span> <span class="s1">'0.9.0'</span></pre></div> </td> </tr> <tr id="section-4"> <td class="docs"> <div class="octowrap"> <a class="octothorpe" href="#section-4">#</a> </div> <p>Instantiate a Lexer for our use here.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">lexer</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">Lexer</span></pre></div> </td> </tr> <tr id="section-5"> <td class="docs"> <div class="octowrap"> <a class="octothorpe" href="#section-5">#</a> </div> <p>Compile a string of CoffeeScript code to JavaScript, using the Coffee/Jison
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compiler.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">exports</span><span class="p">.</span><span class="nx">compile</span> <span class="o">=</span> <span class="nx">compile</span> <span class="o">=</span> <span class="p">(</span><span class="nx">code</span><span class="p">,</span> <span class="nx">options</span><span class="p">)</span> <span class="o">-></span>
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<span class="k">this</span><span class="p">.</span><span class="nv">exports = </span><span class="k">this</span><span class="p">.</span><span class="nv">CoffeeScript = </span><span class="p">{}</span>
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<span class="nv">Lexer = </span><span class="k">this</span><span class="p">.</span><span class="nx">Lexer</span>
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<span class="nv">parser = </span><span class="k">this</span><span class="p">.</span><span class="nx">parser</span>
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<span class="nv">helpers = </span><span class="k">this</span><span class="p">.</span><span class="nx">helpers</span></pre></div> </td> </tr> <tr id="section-3"> <td class="docs"> <div class="octowrap"> <a class="octothorpe" href="#section-3">#</a> </div> <p>The current CoffeeScript version number.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nv">exports.VERSION = </span><span class="s1">'0.9.0'</span></pre></div> </td> </tr> <tr id="section-4"> <td class="docs"> <div class="octowrap"> <a class="octothorpe" href="#section-4">#</a> </div> <p>Instantiate a Lexer for our use here.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nv">lexer = </span><span class="k">new</span> <span class="nx">Lexer</span></pre></div> </td> </tr> <tr id="section-5"> <td class="docs"> <div class="octowrap"> <a class="octothorpe" href="#section-5">#</a> </div> <p>Compile a string of CoffeeScript code to JavaScript, using the Coffee/Jison
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compiler.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nv">exports.compile = compile = </span><span class="p">(</span><span class="nx">code</span><span class="p">,</span> <span class="nx">options</span><span class="p">)</span> <span class="o">-></span>
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<span class="nx">options</span> <span class="o">or=</span> <span class="p">{}</span>
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<span class="k">try</span>
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<span class="p">(</span><span class="nx">parser</span><span class="p">.</span><span class="nx">parse</span> <span class="nx">lexer</span><span class="p">.</span><span class="nx">tokenize</span> <span class="nx">code</span><span class="p">).</span><span class="nx">compile</span> <span class="nx">options</span>
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<span class="k">catch</span> <span class="nx">err</span>
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<span class="nx">err</span><span class="p">.</span><span class="nx">message</span> <span class="o">=</span> <span class="s2">"In #options.fileName, #err.message"</span> <span class="k">if</span> <span class="nx">options</span><span class="p">.</span><span class="nx">fileName</span>
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<span class="k">throw</span> <span class="nx">err</span></pre></div> </td> </tr> <tr id="section-6"> <td class="docs"> <div class="octowrap"> <a class="octothorpe" href="#section-6">#</a> </div> <p>Tokenize a string of CoffeeScript code, and return the array of tokens.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">exports</span><span class="p">.</span><span class="nx">tokens</span> <span class="o">=</span> <span class="p">(</span><span class="nx">code</span><span class="p">)</span> <span class="o">-></span>
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<span class="nv">err.message = </span><span class="s2">"In #options.fileName, #err.message"</span> <span class="k">if</span> <span class="nx">options</span><span class="p">.</span><span class="nx">fileName</span>
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<span class="k">throw</span> <span class="nx">err</span></pre></div> </td> </tr> <tr id="section-6"> <td class="docs"> <div class="octowrap"> <a class="octothorpe" href="#section-6">#</a> </div> <p>Tokenize a string of CoffeeScript code, and return the array of tokens.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nv">exports.tokens = </span><span class="p">(</span><span class="nx">code</span><span class="p">)</span> <span class="o">-></span>
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<span class="nx">lexer</span><span class="p">.</span><span class="nx">tokenize</span> <span class="nx">code</span></pre></div> </td> </tr> <tr id="section-7"> <td class="docs"> <div class="octowrap"> <a class="octothorpe" href="#section-7">#</a> </div> <p>Tokenize and parse a string of CoffeeScript code, and return the AST. You can
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then compile it by calling <code>.compile()</code> on the root, or traverse it by using
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<code>.traverse()</code> with a callback.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">exports</span><span class="p">.</span><span class="nx">nodes</span> <span class="o">=</span> <span class="p">(</span><span class="nx">code</span><span class="p">)</span> <span class="o">-></span>
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<code>.traverse()</code> with a callback.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nv">exports.nodes = </span><span class="p">(</span><span class="nx">code</span><span class="p">)</span> <span class="o">-></span>
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<span class="nx">parser</span><span class="p">.</span><span class="nx">parse</span> <span class="nx">lexer</span><span class="p">.</span><span class="nx">tokenize</span> <span class="nx">code</span></pre></div> </td> </tr> <tr id="section-8"> <td class="docs"> <div class="octowrap"> <a class="octothorpe" href="#section-8">#</a> </div> <p>Compile and execute a string of CoffeeScript (on the server), correctly
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setting <code>__filename</code>, <code>__dirname</code>, and relative <code>require()</code>.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">exports</span><span class="p">.</span><span class="nx">run</span> <span class="o">=</span> <span class="p">((</span><span class="nx">code</span><span class="p">,</span> <span class="nx">options</span><span class="p">)</span> <span class="o">-></span>
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<span class="nx">module</span><span class="p">.</span><span class="nx">filename</span> <span class="o">=</span> <span class="nx">__filename</span> <span class="o">=</span> <span class="nx">options</span><span class="p">.</span><span class="nx">fileName</span>
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<span class="nx">__dirname</span> <span class="o">=</span> <span class="nx">path</span><span class="p">.</span><span class="nx">dirname</span> <span class="nx">__filename</span>
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setting <code>__filename</code>, <code>__dirname</code>, and relative <code>require()</code>.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nv">exports.run = </span><span class="p">((</span><span class="nx">code</span><span class="p">,</span> <span class="nx">options</span><span class="p">)</span> <span class="o">-></span>
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<span class="nv">module.filename = __filename = </span><span class="nx">options</span><span class="p">.</span><span class="nx">fileName</span>
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<span class="nv">__dirname = </span><span class="nx">path</span><span class="p">.</span><span class="nx">dirname</span> <span class="nx">__filename</span>
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<span class="nb">eval</span> <span class="nx">exports</span><span class="p">.</span><span class="nx">compile</span> <span class="nx">code</span><span class="p">,</span> <span class="nx">options</span>
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<span class="p">)</span></pre></div> </td> </tr> <tr id="section-9"> <td class="docs"> <div class="octowrap"> <a class="octothorpe" href="#section-9">#</a> </div> <p>The real Lexer produces a generic stream of tokens. This object provides a
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thin wrapper around it, compatible with the Jison API. We can then pass it
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directly as a "Jison lexer".</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">parser</span><span class="p">.</span><span class="nx">lexer</span> <span class="o">=</span>
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<span class="nv">lex: </span><span class="o">-></span>
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<span class="nx">token</span> <span class="o">=</span> <span class="nx">@tokens</span><span class="p">[</span><span class="nx">@pos</span><span class="p">]</span> <span class="o">or</span> <span class="p">[</span><span class="s2">""</span><span class="p">]</span>
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directly as a "Jison lexer".</p> </td> <td class="code"> <div class="highlight"><pre><span class="nv">parser.lexer =</span>
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<span class="nx">lex</span><span class="o">:</span> <span class="o">-></span>
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<span class="nv">token = </span><span class="nx">@tokens</span><span class="p">[</span><span class="nx">@pos</span><span class="p">]</span> <span class="o">or</span> <span class="p">[</span><span class="s2">""</span><span class="p">]</span>
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<span class="nx">@pos</span> <span class="o">+=</span> <span class="mi">1</span>
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<span class="k">this</span><span class="p">.</span><span class="nx">yylineno</span> <span class="o">=</span> <span class="nx">token</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span>
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<span class="k">this</span><span class="p">.</span><span class="nx">yytext</span> <span class="o">=</span> <span class="nx">token</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
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<span class="k">this</span><span class="p">.</span><span class="nv">yylineno = </span><span class="nx">token</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span>
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<span class="k">this</span><span class="p">.</span><span class="nv">yytext = </span><span class="nx">token</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
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<span class="nx">token</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
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<span class="nv">setInput: </span><span class="p">(</span><span class="nx">tokens</span><span class="p">)</span> <span class="o">-></span>
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<span class="nx">@tokens</span> <span class="o">=</span> <span class="nx">tokens</span>
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<span class="nx">@pos</span> <span class="o">=</span> <span class="mi">0</span>
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<span class="nv">upcomingInput: </span><span class="o">-></span> <span class="s2">""</span></pre></div> </td> </tr> <tr id="section-10"> <td class="docs"> <div class="octowrap"> <a class="octothorpe" href="#section-10">#</a> </div> <p>Activate CoffeeScript in the browser by having it compile and evaluate
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<span class="nx">setInput</span><span class="o">:</span> <span class="p">(</span><span class="nx">tokens</span><span class="p">)</span> <span class="o">-></span>
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<span class="vi">@tokens = </span><span class="nx">tokens</span>
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<span class="vi">@pos = </span><span class="mi">0</span>
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<span class="nx">upcomingInput</span><span class="o">:</span> <span class="o">-></span> <span class="s2">""</span></pre></div> </td> </tr> <tr id="section-10"> <td class="docs"> <div class="octowrap"> <a class="octothorpe" href="#section-10">#</a> </div> <p>Activate CoffeeScript in the browser by having it compile and evaluate
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all script tags with a content-type of <code>text/coffeescript</code>. This happens
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on page load. Unfortunately, the text contents of remote scripts cannot be
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accessed from the browser, so only inline script tags will work.</p> </td> <td class="code"> <div class="highlight"><pre><span class="k">if</span> <span class="nb">document</span><span class="o">?</span> <span class="o">and</span> <span class="nb">document</span><span class="p">.</span><span class="nx">getElementsByTagName</span>
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<span class="nx">processScripts</span> <span class="o">=</span> <span class="o">-></span>
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<span class="nv">processScripts = </span><span class="o">-></span>
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<span class="k">for</span> <span class="nx">tag</span> <span class="k">in</span> <span class="nb">document</span><span class="p">.</span><span class="nx">getElementsByTagName</span><span class="p">(</span><span class="s1">'script'</span><span class="p">)</span> <span class="k">when</span> <span class="nx">tag</span><span class="p">.</span><span class="nx">type</span> <span class="o">is</span> <span class="s1">'text/coffeescript'</span>
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<span class="nb">eval</span> <span class="nx">exports</span><span class="p">.</span><span class="nx">compile</span> <span class="nx">tag</span><span class="p">.</span><span class="nx">innerHTML</span>
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<span class="k">if</span> <span class="nb">window</span><span class="p">.</span><span class="nx">addEventListener</span>
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