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Update compiler/rustc_typeck/src/check/region.rs

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Niko Matsakis 2022-05-26 10:44:29 -04:00 committed by GitHub
parent 4c6074fbb0
commit 5ced8918fa
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1 changed files with 5 additions and 0 deletions
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compiler/rustc_typeck/src/check/region.rs
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@ -797,6 +797,11 @@ impl<'tcx> Visitor<'tcx> for RegionResolutionVisitor<'tcx> {
/// Per-body `region::ScopeTree`. The `DefId` should be the owner `DefId` for the body;
/// in the case of closures, this will be redirected to the enclosing function.
///
/// Performance: This is a query rather than a simple function to enable
/// re-use in incremental scenarios. We may sometimes need to rerun the
/// type checker even when the HIR hasn't changed, and in those cases
/// we can avoid reconstructing the region scope tree.
pub fn region_scope_tree(tcx: TyCtxt<'_>, def_id: DefId) -> &ScopeTree {
let typeck_root_def_id = tcx.typeck_root_def_id(def_id);
if typeck_root_def_id != def_id {