annotate rust/hg-core/src/testing.rs @ 51470:406b413e3cf2 stable

rust-filepatterns: export glob_to_re function

Making this function public should not risk freezing the internal API,
and it can be useful for all downstream code that needs to perform
glob matching against byte strings, such as RHGitaly where it will
be useful to match on branches and tags.

// testing.rs
//
// Copyright 2018 Georges Racinet <[e-mail]>
//
// 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])
    }
}