Source : Free On-Line Dictionary of Computing

cppp
     
         A compiler {front-end} for {C++} by Tony Davis
         with complete semantic processing.  cppp is
        based on {Yacc} and outputs an {abstract syntax graph}.
        Version: 1.14.
     
        {(ftp://wilma.cs.brown.edu/pub/cppp.tar.Z)}.
     
        (1993-05-26)