On Tuesday, 24 December 2013 at 11:05:05 UTC, Jakob Ovrum wrote:
On Tuesday, 24 December 2013 at 10:38:17 UTC, Francesco
Cattoglio wrote:
The range will only be a RA range for types that implement
(inc * n) and ((end - begin) / step) (used for lenght
computation), otherwise it will be a ForwardRange, because it
can't be directional if we can't compute the last element in
O(1).
Bidirectionality and random access are separate capabilities;
the former can be supported without the latter through.
Actually, if the range is infinite, then you can also have RA
without bidirectionality.
