🚀 go-pugleaf

In article <BOBO.94Nov9112502@avogadro.arc.nasa.gov> bobo@avogadro.arc.nasa.gov (Mark Friedman) writes:

   Essentially, we need a free version of an Open Doc / OLE
   / Corba kind of thing. ILU is one such beast (see
   ftp://parcftp.parc.xerox.com/pub/ilu/1.6.4/announce.html). I think it
   has some problems (e.g. no support for first class procedures) but it
   would be one place to start.

Mark and I have discussed the lack of first class procedures in ILU a
bit.  It might be interesting syntactic sugar, but all functionality
it would provide is already provided via the normal ILU object system.

We are considering describing a possible ILU "cliche", such as

  TYPE CallbackProc1 = OBJECT SUPERTYPES ilu.FirstClassProc END
    METHODS
      Invoke (  (* args here *)  )
    END;

which would be treated specially by various languages which allow
runtime procedure definition (Python, Tcl, Emacs-Lisp, Common Lisp),
to provide the exact functionality of first class procedures.

A more interesting extension would be first-class types :-)...

Bill
--
 Bill Janssen  <janssen@parc.xerox.com> (415) 812-4763  FAX: (415) 812-4777
 Xerox Palo Alto Research Center, 3333 Coyote Hill Rd, Palo Alto, CA  94304
 URL:  ftp://parcftp.parc.xerox.com/pub/ilu/misc/janssen.html