Getters/setters generator

[Andrei Alexandrescu via Digitalmars-d-announce]

On 1/18/17 5:29 PM, Mark wrote:
> I see. Is there a way to call invariant() of a class/struct directly?
> That would obviate the need for a particular predicate (copy the class
> state, run the setter, check if invariants are satisfied and restore
> previous state if they aren't).

It seems painfully obvious the right way is a guarded assignment and 
anything else would be a more or less painful workaround. -- Andrei