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Use slice patterns to match projection base

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Santiago Pastorino 2019-08-24 20:53:20 -04:00
parent b04e6c7344
commit e73d189e4e
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12 changed files with 66 additions and 117 deletions
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5
src/librustc/mir/visit.rs
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@ -720,12 +720,9 @@ macro_rules! make_mir_visitor {
projection: & $($mutability)? [PlaceElem<'tcx>],
context: PlaceContext,
location: Location) {
if !projection.is_empty() {
let proj_len = projection.len();
let proj_base = & $($mutability)? projection[..proj_len - 1];
if let [proj_base @ .., elem] = projection {
self.visit_projection(base, proj_base, context, location);
let elem = & $($mutability)? projection[proj_len - 1];
match elem {
ProjectionElem::Field(_field, ty) => {
self.visit_ty(ty, TyContext::Location(location));