Jon Lang wrote:
Here, we need a bit of a clarification: are we talking roles or
classes?  Real example: Numeric is a role; Num is a class.  Both can
be used in signatures; but only classes can be used to create objects.
 That is, "my Num $x;" works; but "my Numeric $x;" doesn't.  As such,
you cannot coerce an object to a role; you can only coerce it to a
class that does that role.

Bad example. Both of those would work. Otherwise one of the main reasons for roles to exist, which is to be able to declare a container $x and say that it may hold anything that does role Y, wouldn't be possible. Perhaps a better example is "" works but "" doesn't. -- Darren Duncan

Reply via email to