HaloO, On Sunday, 25. October 2009 01:38:21 Martin D Kealey wrote: > Sounds like going back to static typing -- which does sometimes have some > advantages.
Well, you can also consider it dynamic. The important point is that it is a constraint on allowed types e.g. in the sig of a sub or on a variable. In my proposal they are handled through conversion on class level. > One way to implement at would be to use proxy objects, which only do > one of the roles (by passing them through to the appropriate methods on the > original object). Do I understand you right that you propose to have a Dogwood class and two auxiliary proxy classes for the Dog and Wood roles? Isn't that too much effort? OTOH, a conversion routine could indeed return such a proxy if the original shall be kept unchanged. Regards, TSa. -- "The unavoidable price of reliability is simplicity" -- C.A.R. Hoare "Simplicity does not precede complexity, but follows it." -- A.J. Perlis 1 + 2 + 3 + 4 + ... = -1/12 -- Srinivasa Ramanujan
