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annotate rust/hg-core/src/lib.rs @ 40933:18513d6ef7d4

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rust: changed Graph.parents to return [Revision; 2] This will allow for simple iteration on parent revisions, such as: for parent in graph.parents(rev)?.iter().cloned() This seems to be a zero overhead abstraction once built in release mode. Differential Revision: https://phab.mercurial-scm.org/D5415
author Georges Racinet <gracinet@anybox.fr>
date Fri, 30 Nov 2018 00:44:04 +0100
parents dbc28c91f7ff
children d097dd0afc19
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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dbc28c91f7ff rust: pure Rust lazyancestors iterator
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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;
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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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18513d6ef7d4 rust: changed Graph.parents to return [Revision; 2]
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18 fn parents(&self, Revision) -> Result<[Revision; 2], GraphError>;
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19 }
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20
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21 #[derive(Clone, Debug, PartialEq)]
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22 pub enum GraphError {
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23 ParentOutOfRange(Revision),
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24 }