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[util/walk] Add findNodeAfter

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Marijn Haverbeke 2013-02-24 21:25:25 +01:00
parent 72d2fc2644
commit b1845b51b1
2 changed files with 34 additions and 18 deletions
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@ -555,17 +555,15 @@ will return <code>null</code> unless the integer has exactly <code>len</code> di
<span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="sr">/[89]/</span><span class="p">.</span><span class="nx">test</span><span class="p">(</span><span class="nx">str</span><span class="p">)</span> <span class="o">||</span> <span class="nx">strict</span><span class="p">)</span> <span class="nx">raise</span><span class="p">(</span><span class="nx">start</span><span class="p">,</span> <span class="s2">&quot;Invalid number&quot;</span><span class="p">);</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="sr">/[89]/</span><span class="p">.</span><span class="nx">test</span><span class="p">(</span><span class="nx">str</span><span class="p">)</span> <span class="o">||</span> <span class="nx">strict</span><span class="p">)</span> <span class="nx">raise</span><span class="p">(</span><span class="nx">start</span><span class="p">,</span> <span class="s2">&quot;Invalid number&quot;</span><span class="p">);</span>
<span class="k">else</span> <span class="nx">val</span> <span class="o">=</span> <span class="nb">parseInt</span><span class="p">(</span><span class="nx">str</span><span class="p">,</span> <span class="mi">8</span><span class="p">);</span> <span class="k">else</span> <span class="nx">val</span> <span class="o">=</span> <span class="nb">parseInt</span><span class="p">(</span><span class="nx">str</span><span class="p">,</span> <span class="mi">8</span><span class="p">);</span>
<span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_num</span><span class="p">,</span> <span class="nx">val</span><span class="p">);</span> <span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_num</span><span class="p">,</span> <span class="nx">val</span><span class="p">);</span>
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-69"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-69">&#182;</a> </div> <p>Read a string value, interpreting backslash-escapes.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">var</span> <span class="nx">rs_str</span> <span class="o">=</span> <span class="p">[];</span> <span class="p">}</span></pre></div> </td> </tr> <tr id="section-69"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-69">&#182;</a> </div> <p>Read a string value, interpreting backslash-escapes.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">function</span> <span class="nx">readString</span><span class="p">(</span><span class="nx">quote</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">function</span> <span class="nx">readString</span><span class="p">(</span><span class="nx">quote</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">tokPos</span><span class="o">++</span><span class="p">;</span> <span class="nx">tokPos</span><span class="o">++</span><span class="p">;</span>
<span class="nx">rs_str</span><span class="p">.</span><span class="nx">length</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="kd">var</span> <span class="nx">out</span> <span class="o">=</span> <span class="s2">&quot;&quot;</span><span class="p">;</span>
<span class="k">for</span> <span class="p">(;;)</span> <span class="p">{</span> <span class="k">for</span> <span class="p">(;;)</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">tokPos</span> <span class="o">&gt;=</span> <span class="nx">inputLen</span><span class="p">)</span> <span class="nx">raise</span><span class="p">(</span><span class="nx">tokStart</span><span class="p">,</span> <span class="s2">&quot;Unterminated string constant&quot;</span><span class="p">);</span> <span class="k">if</span> <span class="p">(</span><span class="nx">tokPos</span> <span class="o">&gt;=</span> <span class="nx">inputLen</span><span class="p">)</span> <span class="nx">raise</span><span class="p">(</span><span class="nx">tokStart</span><span class="p">,</span> <span class="s2">&quot;Unterminated string constant&quot;</span><span class="p">);</span>
<span class="kd">var</span> <span class="nx">ch</span> <span class="o">=</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span><span class="p">);</span> <span class="kd">var</span> <span class="nx">ch</span> <span class="o">=</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span><span class="p">);</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">ch</span> <span class="o">===</span> <span class="nx">quote</span><span class="p">)</span> <span class="p">{</span> <span class="k">if</span> <span class="p">(</span><span class="nx">ch</span> <span class="o">===</span> <span class="nx">quote</span><span class="p">)</span> <span class="p">{</span>
<span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span> <span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span>
<span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_string</span><span class="p">,</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">.</span><span class="nx">apply</span><span class="p">(</span><span class="kc">null</span><span class="p">,</span> <span class="nx">rs_str</span><span class="p">));</span> <span class="k">return</span> <span class="nx">finishToken</span><span class="p">(</span><span class="nx">_string</span><span class="p">,</span> <span class="nx">out</span><span class="p">);</span>
<span class="p">}</span> <span class="p">}</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">ch</span> <span class="o">===</span> <span class="mi">92</span><span class="p">)</span> <span class="p">{</span> <span class="c1">// &#39;\&#39;</span> <span class="k">if</span> <span class="p">(</span><span class="nx">ch</span> <span class="o">===</span> <span class="mi">92</span><span class="p">)</span> <span class="p">{</span> <span class="c1">// &#39;\&#39;</span>
<span class="nx">ch</span> <span class="o">=</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="o">++</span><span class="nx">tokPos</span><span class="p">);</span> <span class="nx">ch</span> <span class="o">=</span> <span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="o">++</span><span class="nx">tokPos</span><span class="p">);</span>
@ -576,30 +574,30 @@ will return <code>null</code> unless the integer has exactly <code>len</code> di
<span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span> <span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">octal</span><span class="p">)</span> <span class="p">{</span> <span class="k">if</span> <span class="p">(</span><span class="nx">octal</span><span class="p">)</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">strict</span><span class="p">)</span> <span class="nx">raise</span><span class="p">(</span><span class="nx">tokPos</span> <span class="o">-</span> <span class="mi">2</span><span class="p">,</span> <span class="s2">&quot;Octal literal in strict mode&quot;</span><span class="p">);</span> <span class="k">if</span> <span class="p">(</span><span class="nx">strict</span><span class="p">)</span> <span class="nx">raise</span><span class="p">(</span><span class="nx">tokPos</span> <span class="o">-</span> <span class="mi">2</span><span class="p">,</span> <span class="s2">&quot;Octal literal in strict mode&quot;</span><span class="p">);</span>
<span class="nx">rs_str</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nb">parseInt</span><span class="p">(</span><span class="nx">octal</span><span class="p">,</span> <span class="mi">8</span><span class="p">));</span> <span class="nx">out</span> <span class="o">+=</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nb">parseInt</span><span class="p">(</span><span class="nx">octal</span><span class="p">,</span> <span class="mi">8</span><span class="p">));</span>
<span class="nx">tokPos</span> <span class="o">+=</span> <span class="nx">octal</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="nx">tokPos</span> <span class="o">+=</span> <span class="nx">octal</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="p">}</span> <span class="k">else</span> <span class="p">{</span> <span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
<span class="k">switch</span> <span class="p">(</span><span class="nx">ch</span><span class="p">)</span> <span class="p">{</span> <span class="k">switch</span> <span class="p">(</span><span class="nx">ch</span><span class="p">)</span> <span class="p">{</span>
<span class="k">case</span> <span class="mi">110</span><span class="o">:</span> <span class="nx">rs_str</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="mi">10</span><span class="p">);</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;n&#39; -&gt; &#39;\n&#39;</span> <span class="k">case</span> <span class="mi">110</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="s2">&quot;\n&quot;</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;n&#39; -&gt; &#39;\n&#39;</span>
<span class="k">case</span> <span class="mi">114</span><span class="o">:</span> <span class="nx">rs_str</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="mi">13</span><span class="p">);</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;r&#39; -&gt; &#39;\r&#39;</span> <span class="k">case</span> <span class="mi">114</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="s2">&quot;\r&quot;</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;r&#39; -&gt; &#39;\r&#39;</span>
<span class="k">case</span> <span class="mi">120</span><span class="o">:</span> <span class="nx">rs_str</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">readHexChar</span><span class="p">(</span><span class="mi">2</span><span class="p">));</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;x&#39;</span> <span class="k">case</span> <span class="mi">120</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">readHexChar</span><span class="p">(</span><span class="mi">2</span><span class="p">));</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;x&#39;</span>
<span class="k">case</span> <span class="mi">117</span><span class="o">:</span> <span class="nx">rs_str</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">readHexChar</span><span class="p">(</span><span class="mi">4</span><span class="p">));</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;u&#39;</span> <span class="k">case</span> <span class="mi">117</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">readHexChar</span><span class="p">(</span><span class="mi">4</span><span class="p">));</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;u&#39;</span>
<span class="k">case</span> <span class="mi">85</span><span class="o">:</span> <span class="nx">rs_str</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">readHexChar</span><span class="p">(</span><span class="mi">8</span><span class="p">));</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;U&#39;</span> <span class="k">case</span> <span class="mi">85</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">readHexChar</span><span class="p">(</span><span class="mi">8</span><span class="p">));</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;U&#39;</span>
<span class="k">case</span> <span class="mi">116</span><span class="o">:</span> <span class="nx">rs_str</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="mi">9</span><span class="p">);</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;t&#39; -&gt; &#39;\t&#39;</span> <span class="k">case</span> <span class="mi">116</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="s2">&quot;\t&quot;</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;t&#39; -&gt; &#39;\t&#39;</span>
<span class="k">case</span> <span class="mi">98</span><span class="o">:</span> <span class="nx">rs_str</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="mi">8</span><span class="p">);</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;b&#39; -&gt; &#39;\b&#39;</span> <span class="k">case</span> <span class="mi">98</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="s2">&quot;\b&quot;</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;b&#39; -&gt; &#39;\b&#39;</span>
<span class="k">case</span> <span class="mi">118</span><span class="o">:</span> <span class="nx">rs_str</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="mi">11</span><span class="p">);</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;v&#39; -&gt; &#39;\u000b&#39;</span> <span class="k">case</span> <span class="mi">118</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="s2">&quot;\v&quot;</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;v&#39; -&gt; &#39;\u000b&#39;</span>
<span class="k">case</span> <span class="mi">102</span><span class="o">:</span> <span class="nx">rs_str</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="mi">12</span><span class="p">);</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;f&#39; -&gt; &#39;\f&#39;</span> <span class="k">case</span> <span class="mi">102</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="s2">&quot;\f&quot;</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// &#39;f&#39; -&gt; &#39;\f&#39;</span>
<span class="k">case</span> <span class="mi">48</span><span class="o">:</span> <span class="nx">rs_str</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="mi">0</span><span class="p">);</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// 0 -&gt; &#39;\0&#39;</span> <span class="k">case</span> <span class="mi">48</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="s2">&quot;\0&quot;</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">// 0 -&gt; &#39;\0&#39;</span>
<span class="k">case</span> <span class="mi">13</span><span class="o">:</span> <span class="k">if</span> <span class="p">(</span><span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span><span class="p">)</span> <span class="o">===</span> <span class="mi">10</span><span class="p">)</span> <span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span> <span class="c1">// &#39;\r\n&#39;</span> <span class="k">case</span> <span class="mi">13</span><span class="o">:</span> <span class="k">if</span> <span class="p">(</span><span class="nx">input</span><span class="p">.</span><span class="nx">charCodeAt</span><span class="p">(</span><span class="nx">tokPos</span><span class="p">)</span> <span class="o">===</span> <span class="mi">10</span><span class="p">)</span> <span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span> <span class="c1">// &#39;\r\n&#39;</span>
<span class="k">case</span> <span class="mi">10</span><span class="o">:</span> <span class="c1">// &#39; \n&#39;</span> <span class="k">case</span> <span class="mi">10</span><span class="o">:</span> <span class="c1">// &#39; \n&#39;</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">locations</span><span class="p">)</span> <span class="p">{</span> <span class="nx">tokLineStart</span> <span class="o">=</span> <span class="nx">tokPos</span><span class="p">;</span> <span class="o">++</span><span class="nx">tokCurLine</span><span class="p">;</span> <span class="p">}</span> <span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">locations</span><span class="p">)</span> <span class="p">{</span> <span class="nx">tokLineStart</span> <span class="o">=</span> <span class="nx">tokPos</span><span class="p">;</span> <span class="o">++</span><span class="nx">tokCurLine</span><span class="p">;</span> <span class="p">}</span>
<span class="k">break</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span>
<span class="k">default</span><span class="o">:</span> <span class="nx">rs_str</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">ch</span><span class="p">);</span> <span class="k">break</span><span class="p">;</span> <span class="k">default</span><span class="o">:</span> <span class="nx">out</span> <span class="o">+=</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">ch</span><span class="p">);</span> <span class="k">break</span><span class="p">;</span>
<span class="p">}</span> <span class="p">}</span>
<span class="p">}</span> <span class="p">}</span>
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span> <span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">ch</span> <span class="o">===</span> <span class="mi">13</span> <span class="o">||</span> <span class="nx">ch</span> <span class="o">===</span> <span class="mi">10</span> <span class="o">||</span> <span class="nx">ch</span> <span class="o">===</span> <span class="mi">8232</span> <span class="o">||</span> <span class="nx">ch</span> <span class="o">===</span> <span class="mi">8329</span><span class="p">)</span> <span class="nx">raise</span><span class="p">(</span><span class="nx">tokStart</span><span class="p">,</span> <span class="s2">&quot;Unterminated string constant&quot;</span><span class="p">);</span> <span class="k">if</span> <span class="p">(</span><span class="nx">ch</span> <span class="o">===</span> <span class="mi">13</span> <span class="o">||</span> <span class="nx">ch</span> <span class="o">===</span> <span class="mi">10</span> <span class="o">||</span> <span class="nx">ch</span> <span class="o">===</span> <span class="mi">8232</span> <span class="o">||</span> <span class="nx">ch</span> <span class="o">===</span> <span class="mi">8329</span><span class="p">)</span> <span class="nx">raise</span><span class="p">(</span><span class="nx">tokStart</span><span class="p">,</span> <span class="s2">&quot;Unterminated string constant&quot;</span><span class="p">);</span>
<span class="nx">rs_str</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">ch</span><span class="p">);</span> <span class="c1">// &#39;\&#39;</span> <span class="nx">out</span> <span class="o">+=</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span><span class="p">(</span><span class="nx">ch</span><span class="p">);</span> <span class="c1">// &#39;\&#39;</span>
<span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span> <span class="o">++</span><span class="nx">tokPos</span><span class="p">;</span>
<span class="p">}</span> <span class="p">}</span>
<span class="p">}</span> <span class="p">}</span>

18
util/walk.js
View File

@ -95,6 +95,24 @@
} }
}; };
// Find the outermost matching node after a given position.
exports.findNodeAfter = function(node, pos, test, base, state) {
test = makeTest(test);
try {
if (!base) base = exports.base;
var c = function(node, st, override) {
if (node.end < pos) return;
var type = override || node.type;
if (node.start >= pos && test(node, type)) throw new Found(node, st);
base[type](node, st, c);
};
c(node, state);
} catch (e) {
if (e instanceof Found) return e;
throw e;
}
};
// Used to create a custom walker. Will fill in all missing node // Used to create a custom walker. Will fill in all missing node
// type properties with the defaults. // type properties with the defaults.
exports.make = function(funcs, base) { exports.make = function(funcs, base) {