On Friday, 27 November 2015 at 20:14:21 UTC, Andrei Alexandrescu
wrote:
There's this oddity of built-in hash tables: a reference to a
non-empty hash table can be copied and then both references
refer to the same hash table object. However, if the hash table
is null, copying the reference won't track the same object
later on.
Fast-forward to general collections. [...]
Andrei
I'd prefer the factory method and we shouldn't allow lazy
initialization. That's only confusing, if it sometimes works and
sometimes won't work. Null container should throw.
