documentation/code_VALFaustexp.subtree.html

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  20 <code class="code"><span class="keyword">let</span>&nbsp;subtree&nbsp;=&nbsp;<span class="keyword">fun</span>&nbsp;d_tree&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keyword">fun</span>&nbsp;i&nbsp;<span class="keywordsign">-&gt;</span><br>
  21 &nbsp;&nbsp;<span class="keyword">match</span>&nbsp;d_tree&nbsp;<span class="keyword">with</span><br>
  22 &nbsp;&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">End</span>&nbsp;d&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;raise&nbsp;(<span class="constructor">Beam_Matching_Error</span>&nbsp;<span class="string">"Subtree&nbsp;left&nbsp;absent."</span>)<br>
  23 &nbsp;&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">Tree</span>&nbsp;(d,&nbsp;branches)&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;(<br>
  24 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">match</span>&nbsp;branches&nbsp;<span class="keyword">with</span>&nbsp;<br>
  25 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(left,&nbsp;right)&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keyword">if</span>&nbsp;i&nbsp;=&nbsp;0&nbsp;<span class="keyword">then</span>&nbsp;left&nbsp;<span class="keyword">else</span>&nbsp;right)</code></body></html>