Parse EBNF
Parse EBNF is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.
Create a simple parser for EBNF grammars. Here is an ebnf grammar in itself and a parser for it in php.
- You can use regular expressions for lexing.
- Generate the calculator in Arithmetic evaluation using an EBNF description of the calculator.
Here are simple parser rules for a calculator taken from the antlr tutorial
expr : term ( ( PLUS | MINUS ) term )* ; term : factor ( ( MULT | DIV ) factor )* ; factor : NUMBER ;