rust-discovery: starting core implementation Once exposed to the Python side, this core object will avoid costly roundtrips with potentially big sets of revisions. This changeset implements the core logic of the object only, i.e., manipulation of the missing, common and undefined set-like revision attributes. Differential Revision: https://phab.mercurial-scm.org/D6231

--- a/rust/hg-core/src/lib.rs	Wed Feb 20 18:33:53 2019 +0100
+++ b/rust/hg-core/src/lib.rs	Tue Feb 19 23:42:31 2019 +0100
@@ -6,6 +6,7 @@
 pub mod dagops;
 pub use ancestors::{AncestorsIterator, LazyAncestors, MissingAncestors};
 pub mod testing;  // unconditionally built, for use from integration tests
+pub mod discovery;
 
 /// Mercurial revision numbers
 ///