Transform a grammar in ebnf format to bnf with this command: npx grammar-converter myGrammar.ebnf.
The input file has to be formatted with a space before and after every =, |, {, [, (, ), ], } and .. Furthermore the inputfile has to be encoded with LF lineendings. There should be an empty line at the end of the file as well.
This ebnf:
A = a | b .
B = ( c | d ) e .
C = [ A | B ] .
D = a { C | [ f | g ] } .
will get transformed to this:
A = a | b
BP1 = c | d
B = BP1 e
CP1 = A | B | eps
C = CP1
DP1P1P1 = f | g | eps
DP1P1 = C | DP1P1P1
DP1 = DP1 DP1P1 | eps
D = a DP1