bjoernager/rust
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lower_pattern_unadjusted: simplify Binding(..) branch.

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Avoid calling `.node_type(...)` again.
This commit is contained in:
Mazdak Farrokhzad 2019-12-19 22:58:20 +01:00
parent be6381e9e0
commit eb020bc245
1 changed files with 2 additions and 2 deletions
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4
src/librustc_mir/hair/pattern/mod.rs
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@ -573,7 +573,6 @@ impl<'a, 'tcx> PatCtxt<'a, 'tcx> {
}
hir::PatKind::Binding(_, id, ident, ref sub) => {
let var_ty = self.tables.node_type(pat.hir_id);
let bm = *self.tables.pat_binding_modes().get(pat.hir_id)
.expect("missing binding mode");
let (mutability, mode) = match bm {
@ -591,13 +590,14 @@ impl<'a, 'tcx> PatCtxt<'a, 'tcx> {
// A ref x pattern is the same node used for x, and as such it has
// x's type, which is &T, where we want T (the type being matched).
let var_ty = ty;
if let ty::BindByReference(_) = bm {
if let ty::Ref(_, rty, _) = ty.kind {
ty = rty;
} else {
bug!("`ref {}` has wrong type {}", ident, ty);
}
}
};
PatKind::Binding {
mutability,