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<pre><span class="ruby-comment cmt"># File htree/doc.rb, line 56</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">children</span>=[]) <span class="ruby-comment cmt"># :notnew:</span>
<span class="ruby-ivar">@children</span> = <span class="ruby-identifier">children</span>.<span class="ruby-identifier">dup</span>.<span class="ruby-identifier">freeze</span>
<span class="ruby-keyword kw">unless</span> <span class="ruby-ivar">@children</span>.<span class="ruby-identifier">all?</span> {<span class="ruby-operator">|</span><span class="ruby-identifier">c</span><span class="ruby-operator">|</span> <span class="ruby-identifier">c</span>.<span class="ruby-identifier">kind_of?</span>(<span class="ruby-constant">HTree</span><span class="ruby-operator">::</span><span class="ruby-constant">Node</span>) <span class="ruby-keyword kw">and</span> <span class="ruby-operator">!</span><span class="ruby-identifier">c</span>.<span class="ruby-identifier">kind_of?</span>(<span class="ruby-constant">HTree</span><span class="ruby-operator">::</span><span class="ruby-constant">Doc</span>) }
<span class="ruby-identifier">unacceptable</span> = <span class="ruby-ivar">@children</span>.<span class="ruby-identifier">reject</span> {<span class="ruby-operator">|</span><span class="ruby-identifier">c</span><span class="ruby-operator">|</span> <span class="ruby-identifier">c</span>.<span class="ruby-identifier">kind_of?</span>(<span class="ruby-constant">HTree</span><span class="ruby-operator">::</span><span class="ruby-constant">Node</span>) <span class="ruby-keyword kw">and</span> <span class="ruby-operator">!</span><span class="ruby-identifier">c</span>.<span class="ruby-identifier">kind_of?</span>(<span class="ruby-constant">HTree</span><span class="ruby-operator">::</span><span class="ruby-constant">Doc</span>) }
<span class="ruby-identifier">unacceptable</span> = <span class="ruby-identifier">unacceptable</span>.<span class="ruby-identifier">map</span> {<span class="ruby-operator">|</span><span class="ruby-identifier">uc</span><span class="ruby-operator">|</span> <span class="ruby-identifier">uc</span>.<span class="ruby-identifier">inspect</span> }.<span class="ruby-identifier">join</span>(<span class="ruby-value str">', '</span>)
<span class="ruby-identifier">raise</span> <span class="ruby-constant">TypeError</span>, <span class="ruby-node">"Unacceptable document child: #{unacceptable}"</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span></pre>
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