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annotate rust/hg-core/src/lib.rs @ 41228:3b35ebdb9f8c

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narrow: include working copy narrowspec in transaction journal Now that we have separate narrowspecs for the store and the working copy, we need to include both in the transaction journal. Differential Revision: https://phab.mercurial-scm.org/D5505
author Martin von Zweigbergk <martinvonz@google.com>
date Sat, 29 Dec 2018 22:34:38 -0800
parents ef54bd33b476
children 168041fa6d5f
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1 // Copyright 2018 Georges Racinet <gracinet@anybox.fr>
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2 //
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3 // This software may be used and distributed according to the terms of the
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4 // GNU General Public License version 2 or any later version.
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5 mod ancestors;
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6 pub use ancestors::{AncestorsIterator, LazyAncestors, MissingAncestors};
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7
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8 /// Mercurial revision numbers
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9 ///
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10 /// As noted in revlog.c, revision numbers are actually encoded in
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11 /// 4 bytes, and are liberally converted to ints, whence the i32
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12 pub type Revision = i32;
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13
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14 pub const NULL_REVISION: Revision = -1;
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16 /// The simplest expression of what we need of Mercurial DAGs.
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17 pub trait Graph {
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18 /// Return the two parents of the given `Revision`.
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19 ///
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20 /// Each of the parents can be independently `NULL_REVISION`
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21 fn parents(&self, Revision) -> Result<[Revision; 2], GraphError>;
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22 }
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23
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24 #[derive(Clone, Debug, PartialEq)]
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25 pub enum GraphError {
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26 ParentOutOfRange(Revision),
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27 }