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JFlex is a lexical analyzer generator (also known as scanner generator). It is also a rewrite of the very useful tool JLex which was developed by Elliot Berk at Princeton University. JFlex is designed to work together with the LALR parser generator CUP by Scott Hudson, and the Java modification of Berkeley Yacc BYacc/J by Bob Jamison. It can also be used together with other parser generators like ANTLR or as a standalone tool.
This project generates a .html file from the specification of a C program, with a highlighted syntax. Classes are generated from JFlex and Byacc/J. This is intended for academic purposes, but can also be used as a highlighter for C, with html output.
Perl Entrez Gene Parser project provides Perl parsers for NCBI's Entrez Gene based on regular expression, Parse::RecDescent, Parse::Yapp and Perl-byacc. Some can parse human genome annotations in minutes. Documentation and user guides are provided.