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<pre><span class="ruby-comment cmt"># File htree/leaf.rb, line 6</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">version</span>, <span class="ruby-identifier">encoding</span>=<span class="ruby-keyword kw">nil</span>, <span class="ruby-identifier">standalone</span>=<span class="ruby-keyword kw">nil</span>)
<span class="ruby-identifier">init_raw_string</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-regexp re">/\A[a-zA-Z0-9_.:-]+\z/</span> <span class="ruby-operator">!~</span> <span class="ruby-identifier">version</span>
<span class="ruby-identifier">raise</span> <span class="ruby-constant">HTree</span><span class="ruby-operator">::</span><span class="ruby-constant">Error</span>, <span class="ruby-node">"invalid version in XML declaration: #{version.inspect}"</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">encoding</span> <span class="ruby-operator">&&</span> <span class="ruby-regexp re">/\A[A-Za-z][A-Za-z0-9._-]*\z/</span> <span class="ruby-operator">!~</span> <span class="ruby-identifier">encoding</span>
<span class="ruby-identifier">raise</span> <span class="ruby-constant">HTree</span><span class="ruby-operator">::</span><span class="ruby-constant">Error</span>, <span class="ruby-node">"invalid encoding in XML declaration: #{encoding.inspect}"</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">unless</span> <span class="ruby-identifier">standalone</span> <span class="ruby-operator">==</span> <span class="ruby-keyword kw">nil</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">standalone</span> <span class="ruby-operator">==</span> <span class="ruby-keyword kw">true</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">standalone</span> <span class="ruby-operator">==</span> <span class="ruby-keyword kw">false</span>
<span class="ruby-identifier">raise</span> <span class="ruby-constant">HTree</span><span class="ruby-operator">::</span><span class="ruby-constant">Error</span>, <span class="ruby-node">"invalid standalone document declaration in XML declaration: #{standalone.inspect}"</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-ivar">@version</span> = <span class="ruby-identifier">version</span>
<span class="ruby-ivar">@encoding</span> = <span class="ruby-identifier">encoding</span>
<span class="ruby-ivar">@standalone</span> = <span class="ruby-identifier">standalone</span>
<span class="ruby-keyword kw">end</span></pre>
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