RE: [boost] Re: boost::any: explicit constructor?

From: Glen Knowles (gknowles_at_[hidden])
Date: 2004-02-28 13:27:34

>I guess I don't understand the whole concept now.  T* -> void* sounds
>like "narrowing", since it loses information.  int -> long never loses
>information, so "widening" makes sense to me.  What is the criterion?

This is why I like C++'s choice of base and derived, there's never any
confusion. You have the concepts of narrowing and widening correct but
backwards. You narrow a type to a more specific derived type and widen one
to a more general base type.

Glen