Parrot Parrot Compiler Toolkit #30

calc example - grammar

grammar Calc::Grammar;

token TOP { <statement> }

rule statement { <term> <addop> <term> }

token term { \d+ }

token addop { '+' | '-' }
continued...
Copyright © 2008 Patrick R. Michaud
http://www.pmichaud.com/2008/pres/