Hello nido203,

like Corion said, it would have been helpful to mention where this module can be found (monks assume by default CPAN, which is not the case here) and that you are using Perl6.

I found the module finally here on github.

The grammar rules need to be specified in the notation of BNF. You used something else. So it can't work. I would try with some simple examples from the github or the wikipedia page first. Then understand and convert the Parse RecDescent grammar version. 

use Grammar::BNF;
my $g = Grammar::BNF.generate(Q:to<END>

<seq> ::= ...

END
);

[download]
I hope this helps, hexcoder

In reply to Re: converting context free grammar to BNF by hexcoder
in thread converting context free grammar to BNF by nido203

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