view .clang-format @ 41112:3023bc4b3da0

discovery: introduce a partialdiscovery object

This object will ultimately gather the data about common, undecided and
missing revs in a single place and deal with most graph related computations.

The goal is both to clarify the algorithm and to help provides a simple and
clear API that can be reimplemented in Rust.

For now, we only moved the `common` set in the object. In this commit, some
direct access to the "private" `disco._common` attribute persist. They have
not been removed yet because we won't need to expose a full API identical to
`incrementalmissingancestors` and it seems simpler to access the attribute
directly until the replacement is in place.

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