In nearly two decades since the original book was published, utilities flex and bison have been proven more reliable and more powerful than the tools of the original Unix. With flex & bison, you will find a variety of purposes offers a flexible tool. The address syntax that regular expressions crunching tool can not handle compiler Building and interpreters, and handle various processing functions Interpreting the text of the code, configuration files, or other structured format Learn key programming techniques, including abstract syntax tree and symbol table management Applying grammar-SQL Using the full sample code with new features such as a pure (reentrant) lexers and parsers, robust GLR parser, and interfaces for C + +