On Friday, 27 May 2016 at 20:20:36 UTC, chmike wrote:
The public interface of Category is designed so that the
object's state can't be modified and thus remains immutable.
Then... why cast away immutable?
I suppose there's always a core set of variables that are what
the object actually considers for it's constness, while there's
other extra ones for convenience (say lookup hash tables, memoize
and the like) which assist but their presence or lack thereof
only affects speed rather than function...
