OVERVIEW

The cfg program will parse an input using a context free grammar.


INSTALLATION

The cfg program is a perl script.  It assumes that perl is located in
/usr/local/bin/perl.  If that is not true, you need to change the
first line of the cfg program.  Otherwise, just put cfg where you want
it.


OTHER INFO

Run "cfg -h" to get help.  Some cfg files are included.  They
correspond to examples from Section 5.1 of the Linz book.

g1: Example 5.1.  Generates wx, where x is the reverse of w.

g2: Example 5.2.  Generates ab(bbaa)*bba(ba)*, where the number of
bbaa's equals the number of ba's.

g3: Example 5.3.  Generates a*b*, where the number of a's is different
from the number of b's.  S1 is replaced with T.

g4: Example 5.4.  Generates balanced parentheses.  a and b are
replaced with ( and ), respectively.