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rust-cpython: moved generic conversion fn out of ancestors module...
rust-cpython: moved generic conversion fn out of ancestors module This will allow to use it easily from other submodules Differential Revision: https://phab.mercurial-scm.org/D5578

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lib.rs
27 lines | 892 B | application/rls-services+xml | RustLexer
// Copyright 2018 Georges Racinet <gracinet@anybox.fr>
//
// This software may be used and distributed according to the terms of the
// GNU General Public License version 2 or any later version.
mod ancestors;
pub use ancestors::{AncestorsIterator, LazyAncestors, MissingAncestors};
/// Mercurial revision numbers
///
/// As noted in revlog.c, revision numbers are actually encoded in
/// 4 bytes, and are liberally converted to ints, whence the i32
pub type Revision = i32;
pub const NULL_REVISION: Revision = -1;
/// The simplest expression of what we need of Mercurial DAGs.
pub trait Graph {
/// Return the two parents of the given `Revision`.
///
/// Each of the parents can be independently `NULL_REVISION`
fn parents(&self, Revision) -> Result<[Revision; 2], GraphError>;
}
#[derive(Clone, Debug, PartialEq)]
pub enum GraphError {
ParentOutOfRange(Revision),
}