diff rust/hg-core/src/lib.rs @ 42753:fce6dc93a510

rust-dirstate: rust implementation of dirstatemap

The `dirstatemap` is one of the last building blocks needed to get to a
`dirstate.walk` Rust implementation.

Disclaimer: This change is part of a big (10) series of patches, all of which
started as one big changeset that took a long time to write.
This `dirstatemap` implementation is a compromise in terms of complexity both
for me and for the reviewers. I chose to submit this patch right now because
while it is not perfect, it works and is simple enough (IMHO) to be reviewed.

The Python implementation uses a lot of lazy propertycaches, breaks
encapsulation and is used as an iterator in a lot of places, all of which
dictated the somewhat unidiomatic patterns in this change.
Like written in the comments, rewriting this struct to use the typestate
pattern might be a good idea, but this is a good first step.

Differential Revision: https://phab.mercurial-scm.org/D6632

--- a/rust/hg-core/src/lib.rs	Tue Jul 09 15:15:54 2019 +0200
+++ b/rust/hg-core/src/lib.rs	Wed Jul 10 09:56:23 2019 +0200
@@ -10,6 +10,7 @@
 pub mod testing; // unconditionally built, for use from integration tests
 pub use dirstate::{
     dirs_multiset::DirsMultiset,
+    dirstate_map::DirstateMap,
     parsers::{pack_dirstate, parse_dirstate, PARENT_SIZE},
     CopyMap, DirsIterable, DirstateEntry, DirstateParents, EntryState,
     StateMap,