Final by default?

[Michel Fortin]

On 2014-03-14 15:17:08 +0000, Andrei Alexandrescu 
<SeeWebsiteForEmail at erdani.org> said:

> A few possibilities discussed around here:
> 
> !final
> ~final
> final(false)
> @disable final
> 
> I've had an epiphany literally a few seconds ago that "final(false)" 
> has the advantage of being generalizable to "final(bool)" taking any 
> CTFE-able Boolean.
> 
> On occasion I needed a computed qualifier (I think there's code in 
> Phobos like that) and the only way I could do it was through ugly code 
> duplication or odd mixin-generated code. Allowing computed 
> qualifiers/attributes would be a very elegant and general approach, and 
> plays beautifully into the strength of D and our current investment in 
> Boolean compile-time predicates.

final(bool) is my preferred solution too.

It certainly is more verbose than 'virtual', but it offers more 
possibilities. Also, the pattern is already somewhat established with 
align(int).

-- 
Michel Fortin
michel.fortin at michelf.ca
http://michelf.ca