Generic code: @autoconst, @autopure, @autonothrow

[dsimcha]

== Quote from Rainer Deyke (rainerd at eldwood.com)'s article
> On one hand, this addresses a real need.  On the other hand, D is
> already has a serious case featuritis.

With regard to featuritis, I see your point, but IMHO without something like this
pure and nothrow are the worst kind of extra features:  Dead weight features.  If
they clash so severely with generic programming, then to a large extent they're
useless.  Very few people will use them if it means that they can't use D's
metaprogramming capabilities or half of Phobos in the same code.