资料来源 : Free On-Line Dictionary of Computing

PRECCX
     
         (Pre-C-Compiler eXtended) An infinite-{lookahead}
        {compiler-compiler} by Peter Breuer  for
        {context dependent grammars}.  PRECCX generates {ANSI C}.
        Specification scripts are in very {EBNF} with {inherited
        attributes} and {synthetic attributes} allowed.  Scripts can
        be compiled in separate {modules} and linked later.
        {Meta-production rules} are allowed.  Grammars can be
        essentially LL(oo) with optimisations.  A converter for {yacc}
        scripts is available.
     
        Versions 1.xx were known as "PRECC" and only had unbounded
        lookahead.  The 2.xx series added the "X" for "extended" and
        featured higher order parameterisation (inherited attributes).
     
        Version 2.42 integrates inherited and synthesized attributes
        by using a "monadic" model for parsing.  You can now synthsize
        attributes during the pass and inherit them in the remainder,
        e.g.
     
        	@ foo = bar\x gum(x)
     
        synthesises an x in bar and passes it down into gum as a
        parameter.  Useful for @ what = ?\x did_you_say(x), for
        example.  It now compiles into {C} instead of running an
        {interpreter} at parse-time.
     
        Version 2.42 runs under {Unix} and {MS-DOS}.
     
        {Home (http://www.comlab.ox.ac.uk/archive/redo/precc.html)}.
     
        E-mail: Peter Breuer , Jonathan Bowen
        .
     
        ["The PRECC Compiler-Compiler" by P.T. Breuer and J.P. Bowen.
        In E. Davies and A. Findlay (eds.), Proc. UKUUG/SUKUG Joint
        New Year 1993 Conference, St. Cross Centre, Oxford, UK, 6-8
        January 1993, ISBN 1 873611 06 4 (UKUUG), 0 9520700 0 6
        (SUKUG) UKUUG/SUKUG Secretariat, Owles Hall, Buntingford,
        Herts SG9 9PL, UK, pp 167-182, 1993].
     
        (2000-04-24)