On Friday, 17 January 2014 at 08:46:33 UTC, Kagamin wrote:
1. there're two typical usage patterns of signals: you mostly have 0 or 1 slots attached, so it would be nice if having one slot wouldn't require allocation. SlotsArray should be probably a tagged union of SlotImpl and SlotImpl[]. Is it worth an effort?
Well it depends. One of my goals was to minimize memory usage of an empty signal, using a tagged union would increase the space used by an empty signal. (A slot consists of 3 pointers + memory for the tag, the array consists of a pointer and a length)
2. why InvisibleAddress is so big? Isn't it enough to just negate it?
For 64 bit yes, but not for 32 bit. InvisibleAddress handles both.
3. I think, it's important to document, that a weak connection can be destroyed before it becomes logically unneeded. It's an important and non-trivial caveat.
How is this supposed to happen?
