Re: [avrdude-dev] Butterfly (was: Before a release...)

[Joerg Wunsch]

As Brian Dean wrote:

> > I have no idea how this "config_gram.y"-stuff works ;-(
> 
> Just basic YACC / Bison grammar file.

Basically, it's a BNF (Backus-Naur form) on the left-hand side, with
rules added (between {}'s) on the right-hand side.  Thus if you know
BNF, it's usually simple to guess the actual grammar by just reading
the file, though modifying it will of course require a bit of
knowledge about all this.

While YACC stands for ``Yet another compiler-compiler'', it's probably
just /the/ compiler-compiler that is most widely used at all.
-- 
J"org Wunsch                                           Unix support engineer
address@hidden        http://www.interface-systems.de/~j/