Something close in Racket... You could define a match-expander whose runtime use was the class.<div><br></div><div>Jay<br><br><div class="gmail_quote">On Tue, Dec 14, 2010 at 9:53 AM, Jim Wise <span dir="ltr"><<a href="mailto:jwise@draga.com">jwise@draga.com</a>></span> wrote:<br> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="im">David Van Horn <<a href="mailto:dvanhorn@ccs.neu.edu">dvanhorn@ccs.neu.edu</a>> writes:<br> <br> > I learned that every Scala object that defines an apply method can be used<br> > as a function. Cute. It's nice to see a language emphasize the symmetry<br> > between objects and functions.<br> <br> </div>Note that this is actually bi-directional in Scala -- any object which<br> defines an unapply() method can be used in an ml-style pattern matching<br> statement as if it were an algebraic type constructor...<br> <font color="#888888"><br> --<br> Jim Wise<br> <a href="mailto:jwise@draga.com">jwise@draga.com</a><br> </font><br>_________________________________________________<br> For list-related administrative tasks:<br> <a href="http://lists.racket-lang.org/listinfo/users" target="_blank">http://lists.racket-lang.org/listinfo/users</a><br></blockquote></div><br><br clear="all"><br>-- <br>Jay McCarthy <<a href="mailto:jay@cs.byu.edu" target="_blank">jay@cs.byu.edu</a>><br> Assistant Professor / Brigham Young University<br><a href="http://faculty.cs.byu.edu/~jay" target="_blank">http://faculty.cs.byu.edu/~jay</a><br><br>"The glory of God is Intelligence" - D&C 93<br> </div>