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xml 简单解析器

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Cast to a more defined type. Will return null if not of the requested type. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a65"></a><!-- doxytag: member="TiXmlNode::ToDeclaration" ref="a65" args="() const " -->
virtual const <a class="el" href="classTiXmlDeclaration.html">TiXmlDeclaration</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classTiXmlNode.html#a65">ToDeclaration</a> () const </td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Cast to a more defined type. Will return null if not of the requested type. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a66"></a><!-- doxytag: member="TiXmlNode::ToDocument" ref="a66" args="()" -->
virtual <a class="el" href="classTiXmlDocument.html">TiXmlDocument</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classTiXmlNode.html#a66">ToDocument</a> ()</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Cast to a more defined type. Will return null if not of the requested type. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a67"></a><!-- doxytag: member="TiXmlNode::ToElement" ref="a67" args="()" -->
virtual <a class="el" href="classTiXmlElement.html">TiXmlElement</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classTiXmlNode.html#a67">ToElement</a> ()</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Cast to a more defined type. Will return null if not of the requested type. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a68"></a><!-- doxytag: member="TiXmlNode::ToComment" ref="a68" args="()" -->
virtual <a class="el" href="classTiXmlComment.html">TiXmlComment</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classTiXmlNode.html#a68">ToComment</a> ()</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Cast to a more defined type. Will return null if not of the requested type. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a69"></a><!-- doxytag: member="TiXmlNode::ToUnknown" ref="a69" args="()" -->
virtual <a class="el" href="classTiXmlUnknown.html">TiXmlUnknown</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classTiXmlNode.html#a69">ToUnknown</a> ()</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Cast to a more defined type. Will return null if not of the requested type. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a70"></a><!-- doxytag: member="TiXmlNode::ToText" ref="a70" args="()" -->
virtual <a class="el" href="classTiXmlText.html">TiXmlText</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classTiXmlNode.html#a70">ToText</a> ()</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Cast to a more defined type. Will return null if not of the requested type. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a71"></a><!-- doxytag: member="TiXmlNode::ToDeclaration" ref="a71" args="()" -->
virtual <a class="el" href="classTiXmlDeclaration.html">TiXmlDeclaration</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classTiXmlNode.html#a71">ToDeclaration</a> ()</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Cast to a more defined type. Will return null if not of the requested type. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual <a class="el" href="classTiXmlNode.html">TiXmlNode</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classTiXmlNode.html#a72">Clone</a> () const =0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Create an exact duplicate of this node and return it.  <a href="#a72"></a><br></td></tr>
<tr><td colspan="2"><br><h2>Friends</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="n0"></a><!-- doxytag: member="TiXmlNode::TiXmlDocument" ref="n0" args="" -->
class&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classTiXmlNode.html#n0">TiXmlDocument</a></td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="n1"></a><!-- doxytag: member="TiXmlNode::TiXmlElement" ref="n1" args="" -->
class&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classTiXmlNode.html#n1">TiXmlElement</a></td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">std::istream &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classTiXmlNode.html#n2">operator&gt;&gt;</a> (std::istream &amp;in, <a class="el" href="classTiXmlNode.html">TiXmlNode</a> &amp;base)</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">An input stream operator, for every class.  <a href="#n2"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">std::ostream &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classTiXmlNode.html#n3">operator&lt;&lt;</a> (std::ostream &amp;out, const <a class="el" href="classTiXmlNode.html">TiXmlNode</a> &amp;base)</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">An output stream operator, for every class.  <a href="#n3"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="n4"></a><!-- doxytag: member="TiXmlNode::operator&lt;&lt;" ref="n4" args="(std::string &amp;out, const TiXmlNode &amp;base)" -->
std::string &amp;&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classTiXmlNode.html#n4">operator&lt;&lt;</a> (std::string &amp;out, const <a class="el" href="classTiXmlNode.html">TiXmlNode</a> &amp;base)</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Appends the XML node or attribute to a std::string. <br></td></tr>
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<hr><a name="_details"></a><h2>Detailed Description</h2>
The parent class for everything in the Document Object Model. 
<p>
(Except for attributes). Nodes have siblings, a parent, and children. A node can be in a document, or stand on its own. The type of a TiXmlNode can be queried, and it can be cast to its more defined type.
<p>
<hr><h2>Member Enumeration Documentation</h2>
<a class="anchor" name="w7"></a><!-- doxytag: member="TiXmlNode::NodeType" ref="w7" args="" --><p>
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          <td class="md" nowrap valign="top">enum <a class="el" href="classTiXmlNode.html#w7">TiXmlNode::NodeType</a>          </td>
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<p>
The types of XML nodes supported by TinyXml. 
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(All the unsupported types are picked up by UNKNOWN.)    </td>
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="a72"></a><!-- doxytag: member="TiXmlNode::Clone" ref="a72" args="() const =0" --><p>
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          <td class="md" nowrap valign="top">virtual <a class="el" href="classTiXmlNode.html">TiXmlNode</a>* TiXmlNode::Clone           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap> const<code> [pure virtual]</code></td>
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<p>
Create an exact duplicate of this node and return it. 
<p>
The memory must be deleted by the caller.
<p>
Implemented in <a class="el" href="classTiXmlElement.html#a28">TiXmlElement</a>, <a class="el" href="classTiXmlComment.html#a4">TiXmlComment</a>, <a class="el" href="classTiXmlText.html#b0">TiXmlText</a>, <a class="el" href="classTiXmlDeclaration.html#a9">TiXmlDeclaration</a>, <a class="el" href="classTiXmlUnknown.html#a4">TiXmlUnknown</a>, and <a class="el" href="classTiXmlDocument.html#b1">TiXmlDocument</a>.    </td>
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<a class="anchor" name="a57"></a><!-- doxytag: member="TiXmlNode::GetDocument" ref="a57" args="() const " --><p>
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          <td class="md" nowrap valign="top">const <a class="el" href="classTiXmlDocument.html">TiXmlDocument</a>* TiXmlNode::GetDocument           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap> const</td>
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<p>
Return a pointer to the Document this node lives in. 
<p>
Returns null if not in a document.    </td>
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<a class="anchor" name="a29"></a><!-- doxytag: member="TiXmlNode::InsertAfterChild" ref="a29" args="(TiXmlNode *afterThis, const TiXmlNode &amp;addThis)" --><p>
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          <td class="md" nowrap valign="top"><a class="el" href="classTiXmlNode.html">TiXmlNode</a>* TiXmlNode::InsertAfterChild           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="classTiXmlNode.html">TiXmlNode</a> *&nbsp;</td>
          <td class="mdname" nowrap> <em>afterThis</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>const <a class="el" href="classTiXmlNode.html">TiXmlNode</a> &amp;&nbsp;</td>
          <td class="mdname" nowrap> <em>addThis</em></td>
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          <td class="md"></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"></td>
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<p>
Add a new node related to this. 
<p>
Adds a child after the specified child. Returns a pointer to the new object or NULL if an error occured.    </td>
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<a class="anchor" name="a28"></a><!-- doxytag: member="TiXmlNode::InsertBeforeChild" ref="a28" args="(TiXmlNode *beforeThis, const TiXmlNode &amp;addThis)" --><p>
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          <td class="md" nowrap valign="top"><a class="el" href="classTiXmlNode.html">TiXmlNode</a>* TiXmlNode::InsertBeforeChild           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="classTiXmlNode.html">TiXmlNode</a> *&nbsp;</td>
          <td class="mdname" nowrap> <em>beforeThis</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>const <a class="el" href="classTiXmlNode.html">TiXmlNode</a> &amp;&nbsp;</td>
          <td class="mdname" nowrap> <em>addThis</em></td>
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          <td class="md"></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"></td>
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