span class="emphasis"><em>Spirit.Lex</em></span> to create the lexical
        analyzer over using more traditional tools such as <a href="http://flex.sourceforge.net/" target="_top">Flex</a>
        is its carefully crafted integration with the <a href="http://boost-spirit.com" target="_top">Spirit</a>
        library and the C++ host language. You don't need any external tools to generate
        the code, your lexer will be perfectly integrated with the rest of your program,
        making it possible to