defered new feature

[downs]

BCS wrote:
> A number of times I have found my self wanting to have "new C(args)"
> return a class derived from C. I know this can be done with a static
> function or the like but syntactically, it's unappealing.

Amusing fact: you can assign to "this" in the constructor.

typedef bool Bogus;
const Bogus bogus = false;

class A { this() { this = new B; } this(Bogus) { } }

class B : A { this() { super(bogus); /* rest of constructor */ } }