Fully transitive const is not necessary

[Walter Bright]

Sean Kelly wrote:
>> Essentially, const in C++ only works for
>> trivial objects. (I'm not saying trivial objects are not useful, I'm
>> just saying they are trivial.)
> 
> I think this statement is open to interpretation.  From a theoretical perspective
> I agree.  But with RAII objects managing references and the like, it's rare for
> even very complex objects to contain raw pointers, and such RAII objects can
> be made to fake transitivity of const by overloading their const and non-const
> methods appropriately.

For a new design, we shouldn't have to fake it. And faking it is 
complicated, which means that realistically, it isn't going to get done. 
People will just rely on convention.