No, unlike C, which has only pointers to functions, PL/I has procedure variables, which may of course be based, pointed to.
A pointer, inclusive of a procedure pointer, should be just a pointer, no different from a pointer to an aggregate or scalar. What that pointer points to may of course have an arbitrarily complex structure. In PL/I, for example, declare s character(254) varying, sp pointer, addr builtin ; = addr(s) ; sets sp to ploint not to the first data byte of s, but to its halfword current-length prefix. This is clean. Depoartures from it are unclean. About object-oriented programming I weill limit myself to saying that I judge it misguided at best. John Gilmore, Ashland, MA 01721 - USA ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
