rust-cpython: binding for LazyAncestors...
rust-cpython: binding for LazyAncestors
The `mercurial.rustext.ancestor` module will not in the foreseeable
future be a drop-in replacement for the pure `mercurial.ancestor`, because the
Rust variants take the index at instantiation whereas the Python ones
take a parents function. From the Python side, using the index from `ancestor`
would leak internal details out of `mercurial.revlog`, and that's unwanted.
Therefore, given that classes defined in
`rust-cpython` have the same names in both language, we keep the Rust naming
convention (CamelCase).
Eventually, though, the ancestor module can be placed under control of
`mercurial.policy`, but it will still be up to `revlog` to be aware of
that and play the role of a factory for instantiation.
Differential Revision:
https://phab.mercurial-scm.org/D5441
