This updated classic teaches Unix and Linux developers how to solve specific problems by processing text data, using two key Unix utilities -- flex and bison. Since 1992, the previous edition of this book has taught programmers how to use the lex and yacc Unix utilities in program development. Now, the tools have shifted to flex and bison, and this new edition shows programmers how to use these utilities to parse or process text data, whether it's code, configuration files, or any other structured format. flex & bison addresses a wide range of text processing functions, as well as syntax crunching that regular expressions tools can't handle. The book also offers expanded coverage of key programming techniques, including syntax trees and symbol tables, and helps programmers build compilers and interpreters.