Fw: Re: shortcut

["Etienne Gagnon" <egagnon@sprynet.com>]

It seems that the message didn't get through the first time...

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Why not do it in the lexer? It would simplify the grammar:

Tokens
  begin = 'b' ('e' ('g' ('i' 'n'?)?)?)?;
  mc11 = 'mc1' '1'?;
  mc2 = 'mc2';

Productions
  ... begin ...
  ... mc11 ...
  ... mc2 ...

Etienne
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Now, to Archie: You are mostly right. A small point, though... grammars
described using the BNF notation are "context-free". A context-sensitive
grammar is obtained when the parser uses semantic informations to make
reduce/shift decisions;-).

Etienne