On 11/30/15 11:21 AM, Tobias Pankrath wrote:
On Monday, 30 November 2015 at 16:06:43 UTC, Steven Schveighoffer wrote:
MyCollection!(int) c1;
auto c2 = c1;
c1 ~= 1;
assert(c2.contains(1)); // pass? fail?
BTW, I third Jonathan's and Timon's suggestion -- go with an external
factory function. Use IFTI to its fullest!
That should throw, because you're using an uninitialised reference (c1).
It's the equivalent to:
Class C { .. }
C c1;
C c2 = c1;
c1.foo(); // call via nullptr
Or it needs to pass, but that's probably not worth it.
It means such a collection won't operate in the same way that
associative arrays do.
If that's the case, I'm OK with that.
Technically, a wrapper could be constructed that performed the "lazy
creation".
But my point to Andrei was that the functions he suggests don't actually
address the "oddity" of copying AAs. Addressing it, if it's done in the
way you say, is as simple as not worrying about null pointers.
-Steve
