Hi,

On Mon, Sep 02, 2002 at 10:52:27PM +0200, Oliver Bandel wrote:

> What I do not understand:
> This calculator knows that * and / have higher Priority
> than + and -.
> How is this achieved?

By the order of the rules. The rules with same priority are grouped
together:
   [ ... | ... | ... ]

and there is another level of parentheses (of bracket parentheses)
separated by vertical bars to indicate the priority:
  [
       [ ... | ... | ... ]        (* lowest priority *)
     | [ ... | ... | ... ]        ...
     | [ ... | ... | ... ]        (* highest priority *)
  ]      

> I didn't find any entries, that provide priority-distinction
> between +,-,*,/.

Forget Yacc! :-)

> Is the Grammar-Module magic?
> (Gramagic?)

What do you mean by "magic"?

-- 
Daniel de RAUGLAUDRE
daniel.de_rauglaudre@inria.fr
http://cristal.inria.fr/~ddr/

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