desperately seeking RULES help

[Claus Reinke]

> Here it is:
> 
> {-# OPTIONS_GHC -O2 -Wall -fglasgow-exts -ddump-simpl #-}
> -- compile with: ghc -fno-method-sharing -c F.hs

thanks! it seems i misread the users guide (or is this a bug?).
i used -frewrite-rules ("Switch on all rewrite rules"), which 
does not(!) work, instead of -fglasgow-exts, which does 
work (ghc-6.9.20080514, booted from 6.6.1). 

i learned something new,-)
claus