Pierre-Yves David <pierre-yves.david@fb.com> [Thu, 02 Oct 2014 18:02:17 -0500] rev 22717
spanset: enforce the order lazily to gain `fastasc` and `fastdesc` methods
Instead of having the direction of iteration enforced through the ordering of
`start` and `end` attributes of spanset, we encode the iteration direction in
an explicit attribute and always store start < end. The logic for sort and
reverse has to be updated. The __iter__ is now based on the newly introduced
`fastasc` and `fastdesc` methods.
This will allow other code simplifications in the future.
abstractsmartset: document the `fastasc` and `fastdesc` attributes/methods
See the in-line documentation for details. (This is the beginning of a massive
overhaul of revset).