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Avoid Vec allocation in TyCtxt::mk_place_elem #155778

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Avoid Vec allocation in TyCtxt::mk_place_elem #155778

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8 changes: 4 additions & 4 deletions compiler/rustc_middle/src/ty/context.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -2399,10 +2399,10 @@ impl<'tcx> TyCtxt<'tcx> {
/// to build a full `Place` it's just a convenient way to grab a projection and modify it in
/// flight.
pub fn mk_place_elem(self, place: Place<'tcx>, elem: PlaceElem<'tcx>) -> Place<'tcx> {
let mut projection = place.projection.to_vec();
projection.push(elem);

Place { local: place.local, projection: self.mk_place_elems(&projection) }
Place {
local: place.local,
projection: self.mk_place_elems_from_iter(place.projection.iter().chain([elem])),
}
}

pub fn mk_poly_existential_predicates(
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