The wisent Parser Generator

Wisent is an LALR(1) parser generator with pluggable front- and backends. It generates object-oriented code with clean namespace separation. A yacc-like frontend is currently accompanied by a C++ and a Java backend. The tool itself is implemented in C++.

Platform

• independent (source)
• GNU make, POSIX shell (distributed build scripts)

License

GNU General Public License (GPL)

Build Requirements

Building wisent requires the lexer tool flex.

Quick Start

1. Clone repository: git clone https://github.com/preusser/wisent.git
2. Change into directory 'wisent': cd wisent
3. Build the parser generator: make wisent
4. Test the provided Java example (see also examples/Calc.howto):
   • cd examples
   • ../wisent -bjava Calc
   • javac Calc.java
   • java Calc

Documentation

Please, refer to the technical report TUD-FI04-11.

References

Besides the shipped examples, the parser for the wisent grammar itself in implemented by a wisent grammar. Other use examples can be found in the following projects:

Project	Grammar
Q2D	Boolean Expression Parser
Q27	Range Specification Parser
QBM	QDL Circuit Description Parser