this(this) must be cheap and O(1)

[Andrei Alexandrescu]

On 9/24/11 1:24 PM, Andrej Mitrovic wrote:
> Will we be disallowed from calling extern(C) functions as well? (I
> hope not since CairoD has to use the postblit to call C functions to
> update an internal reference count.)

As long as it's understood that the function has constant complexity and 
reasonable actual cost, extern(C) has no different regime.

Andrei