Mercurial > hg
view rust/hg-cpython/src/conversion.rs @ 48851:d739cd69bb6a
revlog: return 0 for the fast_rank of nullrev
By convention, the rank of the null revision is 0. This particular revision is
never "physically" stored in the changelog, so it is a special case.
For consistency, the value `None` is still being returned for revlogs which do
not store the fast_rank property for any revision.
Differential Revision: https://phab.mercurial-scm.org/D12208
author | pacien <pacien.trangirard@pacien.net> |
---|---|
date | Mon, 21 Feb 2022 15:53:03 +0100 |
parents | 33fe96a5c522 |
children | c7fb9b74e753 |
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// conversion.rs // // Copyright 2019 Georges Racinet <georges.racinet@octobus.net> // // This software may be used and distributed according to the terms of the // GNU General Public License version 2 or any later version. //! Bindings for the hg::ancestors module provided by the //! `hg-core` crate. From Python, this will be seen as `rustext.ancestor` use cpython::{ObjectProtocol, PyObject, PyResult, Python}; use hg::Revision; use std::iter::FromIterator; /// Utility function to convert a Python iterable into various collections /// /// We need this in particular to feed to various methods of inner objects /// with `impl IntoIterator<Item=Revision>` arguments, because /// a `PyErr` can arise at each step of iteration, whereas these methods /// expect iterables over `Revision`, not over some `Result<Revision, PyErr>` pub fn rev_pyiter_collect<C>(py: Python, revs: &PyObject) -> PyResult<C> where C: FromIterator<Revision>, { revs.iter(py)? .map(|r| r.and_then(|o| o.extract::<Revision>(py))) .collect() }