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Parse EBNF: Difference between revisions
link to ebnf example for calculator
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* You can use regular expressions for lexing.
* Generate the calculator in [[Arithmetic evaluation]] using an [http://karmin.ch/ebnf/examples EBNF description] of the calculator.
Here are simple parser rules for a calculator taken from the [http://www.antlr.org/wiki/display/ANTLR3/Five+minute+introduction+to+ANTLR+3 antlr tutorial]<pre>expr : term ( ( PLUS | MINUS ) term )* ;
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