PackCC

PackCC is a packrat parser generator for C. Its defining features are:

• Generates your parser in C from a grammar described in a PEG
• Gives your parser great efficiency by packrat parsing
• Supports direct and indirect left-recursive grammar rules

Some additional features include:

• Thread-safe and reentrant
• Generates compact and readable source
• Consists of just a single compact source file
• Licensed under MIT

The algorithm is based on the paper "Packrat Parsers Can Support Left Recursion" authored by A. Warth, J. R. Douglass, and T. Millstein.

Installation

PackCC consists of just a single compact source file packcc.c. To create the executable, just compile it:

cc -o packcc src/packcc.c

Usage

You must prepare a PEG source file (see the documentation). In our example the file is named example.peg:

packcc example.peg

By running this, the files example.h and example.c are generated.

If no PEG file name is specified, the PEG source is read from the standard input, and -.h and -.c are generated.

The base name of the parser source files can be changed by -o option.

packcc -o parser example.peg

By running this, the files parser.h and parser.c are generated.

Documentation

The docs/ directory contains the full documentation.

Alternatively, the full docs can be found at https://leandros.github.io/PackCC

License

MIT License

Copyright (c) 2014 Arihiro Yoshida Copyright (c) 2017 Arvid Gerstmann