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Reuse a helper method instead of manually rolling it

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This commit is contained in:
Oli Scherer 2022-06-27 14:46:36 +00:00
parent 7a8a048b58
commit 0c6918fe21
1 changed files with 1 additions and 3 deletions
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4
compiler/rustc_mir_build/src/build/matches/test.rs
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@ -724,9 +724,7 @@ fn candidate_after_variant_switch<'pat>(
// So, if we have a match-pattern like `x @ Enum::Variant(P1, P2)`,
// we want to create a set of derived match-patterns like
// `(x as Variant).0 @ P1` and `(x as Variant).1 @ P1`.
let elem =
ProjectionElem::Downcast(Some(adt_def.variant(variant_index).name), variant_index);
let downcast_place = match_pair.place.project(elem); // `(x as Variant)`
let downcast_place = match_pair.place.downcast(adt_def, variant_index); // `(x as Variant)`
let consequent_match_pairs = subpatterns.iter().map(|subpattern| {
// e.g., `(x as Variant).0`
let place = downcast_place.clone().field(subpattern.field, subpattern.pattern.ty);