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Simplify RegionConstraintCollector::vars_since_snapshot

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varkor
2019-03-20 01:54:53 +00:00
parent 92b2021b0a
commit 2a08860ae6
1 changed files with 1 additions and 6 deletions
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7
src/librustc/infer/region_constraints/mod.rs
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@@ -841,12 +841,7 @@ impl<'tcx> RegionConstraintCollector<'tcx> {
} }
pub fn vars_since_snapshot(&self, mark: &RegionSnapshot) -> Vec<RegionVid> { pub fn vars_since_snapshot(&self, mark: &RegionSnapshot) -> Vec<RegionVid> {
self.undo_log[mark.length..] self.unification_table.vars_since_snapshot(&mark.region_snapshot).collect()
.iter()
.filter_map(|&elt| match elt {
AddVar(vid) => Some(vid),
_ => None,
}).collect()
} }
/// See [`RegionInference::region_constraints_added_in_snapshot`]. /// See [`RegionInference::region_constraints_added_in_snapshot`].