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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>Class Poco::Token</title>
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<meta name="author" content="Applied Informatics Software Engineering GmbH and Contributors"/>
<meta name="publisher" content="Applied Informatics Software Engineering GmbH and Contributors"/>
<meta name="copyright" content="Copyright (c) 2009, Applied Informatics Software Engineering GmbH and Contributors"/>
<meta name="language" content="en"/>
<meta name="date" content="2009-11-24"/>
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<div class="header">
<h1 class="namespace"><a href="Poco.html" class="namespace">Poco</a></h1>
<h1 class="symbol">class Token</h1>
</div>
<div class="body">
<p>
<b>Library:</b> Foundation<br />
<b>Package:</b> Streams<br />
<b>Header:</b> Poco/Token.h</p>
<h2>Description</h2>
<div class="description">
<p>The base class for all token classes that can be registered with the <a href="Poco.StreamTokenizer.html" title="class Poco::StreamTokenizer">StreamTokenizer</a>. </p>
</div>
<h2>Inheritance</h2>
<p><b>Known Derived Classes: </b><a href="Poco.InvalidToken.html" title="class Poco::InvalidToken">InvalidToken</a>, <a href="Poco.EOFToken.html" title="class Poco::EOFToken">EOFToken</a>, <a href="Poco.WhitespaceToken.html" title="class Poco::WhitespaceToken">WhitespaceToken</a></p>
<h2>Member Summary</h2>
<p><b>Member Functions: </b><a href="Poco.Token.html#11242" title="Poco::Token::asChar()">asChar</a>, <a href="Poco.Token.html#11241" title="Poco::Token::asFloat()">asFloat</a>, <a href="Poco.Token.html#11240" title="Poco::Token::asInteger()">asInteger</a>, <a href="Poco.Token.html#11239" title="Poco::Token::asString()">asString</a>, <a href="Poco.Token.html#11235" title="Poco::Token::finish()">finish</a>, <a href="Poco.Token.html#11243" title="Poco::Token::is()">is</a>, <a href="Poco.Token.html#11232" title="Poco::Token::start()">start</a>, <a href="Poco.Token.html#11237" title="Poco::Token::tokenClass()">tokenClass</a>, <a href="Poco.Token.html#11238" title="Poco::Token::tokenString()">tokenString</a></p>
<h2>Enumerations</h2>
<h3><a name="11212">Class</a></h3>
<div class="description">
<p></p>
</div>
<p class="decl"><a name="11213">IDENTIFIER_TOKEN</a></p>
<div class="description">
<p></p>
</div>
<p class="decl"><a name="11214">KEYWORD_TOKEN</a></p>
<div class="description">
<p></p>
</div>
<p class="decl"><a name="11215">SEPARATOR_TOKEN</a></p>
<div class="description">
<p></p>
</div>
<p class="decl"><a name="11216">OPERATOR_TOKEN</a></p>
<div class="description">
<p></p>
</div>
<p class="decl"><a name="11217">STRING_LITERAL_TOKEN</a></p>
<div class="description">
<p></p>
</div>
<p class="decl"><a name="11218">CHAR_LITERAL_TOKEN</a></p>
<div class="description">
<p></p>
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<p class="decl"><a name="11219">INTEGER_LITERAL_TOKEN</a></p>
<div class="description">
<p></p>
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<p class="decl"><a name="11220">LONG_INTEGER_LITERAL_TOKEN</a></p>
<div class="description">
<p></p>
</div>
<p class="decl"><a name="11221">FLOAT_LITERAL_TOKEN</a></p>
<div class="description">
<p></p>
</div>
<p class="decl"><a name="11222">DOUBLE_LITERAL_TOKEN</a></p>
<div class="description">
<p></p>
</div>
<p class="decl"><a name="11223">COMMENT_TOKEN</a></p>
<div class="description">
<p></p>
</div>
<p class="decl"><a name="11224">SPECIAL_COMMENT_TOKEN</a></p>
<div class="description">
<p></p>
</div>
<p class="decl"><a name="11225">PREPROCESSOR_TOKEN</a></p>
<div class="description">
<p></p>
</div>
<p class="decl"><a name="11226">WHITESPACE_TOKEN</a></p>
<div class="description">
<p></p>
</div>
<p class="decl"><a name="11227">EOF_TOKEN</a></p>
<div class="description">
<p></p>
</div>
<p class="decl"><a name="11228">INVALID_TOKEN</a></p>
<div class="description">
<p></p>
</div>
<p class="decl"><a name="11229">USER_TOKEN</a></p>
<div class="description">
<p></p>
</div>
<h2>Constructors</h2>
<h3><a name="11230">Token</a></h3>
<p class="decl"><a href="Poco.Token.html" title="class Poco::Token">Token</a>();</p>
<div class="description">
<p>Creates the <a href="Poco.Token.html" title="class Poco::Token">Token</a>. </p>
</div>
<h2>Destructor</h2>
<h3><a name="11231">~Token</a> <img src="images/virtual.gif" alt="virtual" title="virtual" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">virtual ~<a href="Poco.Token.html" title="class Poco::Token">Token</a>();</p>
<div class="description">
<p>Destroys the <a href="Poco.Token.html" title="class Poco::Token">Token</a>. </p>
</div>
<h2>Member Functions</h2>
<h3><a name="11242">asChar</a> <img src="images/virtual.gif" alt="virtual" title="virtual" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">virtual char asChar() const;</p>
<div class="description">
<p>Returns a char representation of the token. </p>
</div>
<h3><a name="11241">asFloat</a> <img src="images/virtual.gif" alt="virtual" title="virtual" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">virtual double asFloat() const;</p>
<div class="description">
<p>Returns a floating-point representation of the token. </p>
</div>
<h3><a name="11240">asInteger</a> <img src="images/virtual.gif" alt="virtual" title="virtual" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">virtual int asInteger() const;</p>
<div class="description">
<p>Returns an integer representation of the token. </p>
</div>
<h3><a name="11239">asString</a> <img src="images/virtual.gif" alt="virtual" title="virtual" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">virtual std::string asString() const;</p>
<div class="description">
<p>Returns a string representation of the token. </p>
</div>
<h3><a name="11235">finish</a> <img src="images/virtual.gif" alt="virtual" title="virtual" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">virtual void finish(<br /> std::istream & istr<br />);</p>
<div class="description">
<p>Builds the token by reading and appending the remaining characters from istr. </p>
</div>
<h3><a name="11243">is</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">bool is(<br /> <a href="Poco.Token.html#11212" title="enum Poco::Token::Class">Class</a> tokenClass<br />) const;</p>
<div class="description">
<p>Returns true if and only if the token has the given class. </p>
</div>
<h3><a name="11232">start</a> <img src="images/virtual.gif" alt="virtual" title="virtual" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">virtual bool start(<br /> char c,<br /> std::istream & istr<br />);</p>
<div class="description">
<p>Checks if the given character (and, optionally, the next character in the input stream) start a valid token. Returns true if so, false otherwise. </p>
<p>The current read position in istr must not be changed. In other words, only the peek() method of istream may be used. </p>
<p>If the character starts the token, it should be set as the token's value. </p>
</div>
<h3><a name="11237">tokenClass</a> <img src="images/virtual.gif" alt="virtual" title="virtual" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">virtual <a href="Poco.Token.html#11212" title="enum Poco::Token::Class">Class</a> tokenClass() const;</p>
<div class="description">
<p>Returns the kind of the token. </p>
</div>
<h3><a name="11238">tokenString</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">const std::string & tokenString() const;</p>
<div class="description">
<p>Returns the token's raw string. </p>
</div>
<h2>Variables</h2>
<h3><a name="11245">_value</a> <img src="images/protected.gif" alt="protected" title="protected" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">std::string _value;</p>
<div class="description">
<p></p>
</div>
<p class="footer">POCO C++ Libraries 1.3.6-all<br />
Copyright © 2009, <a href="http://pocoproject.org/" target="_blank">Applied Informatics Software Engineering GmbH and Contributors</a></p>
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