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typing: make `bundlerepository` subclass `localrepository` while type checking...
typing: make `bundlerepository` subclass `localrepository` while type checking Currently, `mercurial/bundlerepo.py` is excluded from pytype, mostly because it complains that various `ui` and `vfs` fields in `localrepository` are missing. (`bundlerepository` dynamically subclasses `localrepository` when it is instantiated, so it works at runtime.) This makes that class hierarchy known to pytype. Having a protocol for `Repository` is probably the right thing to do, but that will be a lot of work and this still reflects the class at runtime. Subclassing also has the benefit of making sure any method overrides have a matching signature, so maybe this is a situation where we do both of these things. (I'm not sure how clear the diagnostics are if a class *almost* implements a protocol, but is missing a method argument or similar.) The subclassing is not done outside of type checking runs to avoid any side effects on already complex code.
Raphaël Gomès - - Load All Authors

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testing.rs
77 lines | 1.8 KiB | application/rls-services+xml | RustLexer
/ rust / hg-core / src / testing.rs
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// testing.rs
//
// Copyright 2018 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.
use crate::{Graph, GraphError, Revision, NULL_REVISION};
/// A stub `Graph`, same as the one from `test-ancestor.py`
///
/// o 13
/// |
/// | o 12
/// | |
/// | | o 11
/// | | |\
/// | | | | o 10
/// | | | | |
/// | o---+ | 9
/// | | | | |
/// o | | | | 8
/// / / / /
/// | | o | 7
/// | | | |
/// o---+ | 6
/// / / /
/// | | o 5
/// | |/
/// | o 4
/// | |
/// o | 3
/// | |
/// | o 2
/// |/
/// o 1
/// |
/// o 0
#[derive(Clone, Debug)]
pub struct SampleGraph;
impl Graph for SampleGraph {
fn parents(&self, rev: Revision) -> Result<[Revision; 2], GraphError> {
let null_rev = NULL_REVISION.0;
let res = match rev.0 {
0 => Ok([null_rev, null_rev]),
1 => Ok([0, null_rev]),
2 => Ok([1, null_rev]),
3 => Ok([1, null_rev]),
4 => Ok([2, null_rev]),
5 => Ok([4, null_rev]),
6 => Ok([4, null_rev]),
7 => Ok([4, null_rev]),
8 => Ok([null_rev, null_rev]),
9 => Ok([6, 7]),
10 => Ok([5, null_rev]),
11 => Ok([3, 7]),
12 => Ok([9, null_rev]),
13 => Ok([8, null_rev]),
r => Err(GraphError::ParentOutOfRange(Revision(r))),
};
match res {
Ok([a, b]) => Ok([Revision(a), Revision(b)]),
Err(e) => Err(e),
}
}
}
// A Graph represented by a vector whose indices are revisions
// and values are parents of the revisions
pub type VecGraph = Vec<[Revision; 2]>;
impl Graph for VecGraph {
fn parents(&self, rev: Revision) -> Result<[Revision; 2], GraphError> {
Ok(self[rev.0 as usize])
}
}