From: gah@ugcs.caltech.edu   
      
   Many years ago I worked with the STEP Preprocessor.   
      
   It was first described to me as a form of Compiler-Compiler,   
   but it seems more like a Preprocessor-Compiler.  (It runs more   
   like an interpreter than is usual for a compiler.)   
      
   In case anyone is interested, the manual is now online at:   
      
   http://www.bitsavers.org/pdf/stanford/slac/The_STEP_Processor.pdf   
      
   Unlike many preprocessors, the macro form can describe the   
   exact grammar required, process appropriately or print error   
   messages, and generate any required output.   
      
   I now have the source code (in Fortran-66, and in an extended   
   Fortran processed by STEP macros.)  I hope soon to send it to   
   the software archive of bitsavers.   
      
   Not that I follow preprocessors so carefully, but I don't know   
   of anything at all similar done since then (about 1977).   
      
   -- glen   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)