merge: return an attrs class from update() and applyupdates()...
merge: return an attrs class from update() and applyupdates()
Previously, we returned a tuple containing counts. The result of an
update is kind of complex and the use of tuples with nameless fields
made the code a bit harder to read and constrained future expansion
of the return value.
Let's invent an attrs-defined class for representing the result of
an update operation.
We provide __getitem__ and __len__ implementations for backwards
compatibility as a container type to minimize code churn.
In (at least) Python 2, the % operator seems to insist on using
tuples. So we had to update a consumer using the % operator.
.. api::
merge.update() and merge.applyupdates() now return a class
with named attributes instead of a tuple. Switch consumers
to access elements by name instead of by offset.
Differential Revision:
https://phab.mercurial-scm.org/D2692
