HaloO Luke,
you wrote:
[..] The *method* is the one that knows everything, not the object. So definitions on subtypes of general types only check for those subtypes when dispatching to the methods defined in them.
I stand corrected. Lax usage of Any is fair. Defining subtypes of general types and using them to constrain e.g. params of subs is fine, too. But defining a multi branch on a very common operator like +, * or grep for a predicate---i.e. using where---subtype is penalized. Sounds reasonable to me.
MfG -- TSa (Thomas SandlaÃ)
