Defining a Class for this is also overkill.Ye.. well, no. Why?
class Foo is Bar; # normal inheritance class Baz is Bar; # the thing that we are over-killing
Foo.isa("Baz") == FALSE;
A lightweight, typedef-like mechanism behaves differently:
class Foo is Bar; typedef Baz is Bar;
Foo.isa("Baz") == TRUE;
The problem biols down to the fact that inheritance hierarchies are, um, hierarchies -- trees. The lightwieght mechanism provides aliases for nodes within the tree, thus all descendent nodes are also descendents of the aliases.
Dave. -- http://dave.whipp.name
