From: wyrmwif@tsoft.org   
      
   ctx2002@gmail.com wrote:   
   # hi all:   
   #   
   # I am currently learning how to write a compiler , i am using a book   
   # called Compilers Principles , techniques, and tools.   
   #   
   # in this book , there is an exercise asking write a algorithm to   
   # convert a grammar into a equivalent cycle - free grammar.   
      
   In Aho and Ullman _The Theory of Parsing, Translation, and Compiling_,   
   Volume 1, they have a number of grammar transformation algorithms   
   including this one. I don't have a copy at hand, but it's in there.   
      
   --   
   SM Ryan http://www.rawbw.com/~wyrmwif/   
   Mention something out of a Charleton Heston movie, and suddenly   
   everybody's a theology scholar.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)