Racc is a LALR(1) parser generator.
It is written in Ruby itself, and generates Ruby program.
NOTE: Ruby 1.8.x comes with Racc runtime module. You
can run your parsers generated by racc 1.4.x out of the
* Ruby 1.8.x or later.
(*) make and C compiler.
$ gem install racc
Type this in the top directory of the archive:
$ ruby setup.rb config
$ ruby setup.rb setup
You can install Racc into your favorite directory by giving
to setup.rb. e.g.
$ ruby setup.rb config --prefix=/usr
For details, try "ruby setup.rb --help".
If you don't have C Compiler
You can install Racc without C compilers. Type following
command in config phase.
$ ruby setup.rb config --without-ext
Racc comes with simple calculator. To compile this, on shell:
$ racc -o calc calc.y
This process costs few seconds (or less). Then type:
$ ruby calc
... Does it works?
For details of Racc, see HTML documents placed under 'doc.en/'
and sample grammer files under 'sample/'.
Racc is distributed under the terms of the GNU Lesser General
Public License version 2. Note that you do NOT need to follow
LGPL for your own parser (racc outputs). You can provide those
files under any licenses you want.
Any kind of bug reports are welcome.
If you find a bug of Racc, please email me. Your grammer file,
debug output genereted by "racc -g", are helpful.