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Tweak variant_id_for_adt

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This commit is contained in:
Nadrieril 2024-02-06 05:01:05 +01:00
parent 66cec4d11a
commit c2d21242aa
1 changed files with 12 additions and 15 deletions
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27
crates/hir-ty/src/diagnostics/match_check/pat_analysis.rs
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@ -75,18 +75,15 @@ fn is_foreign_non_exhaustive_enum(&self, ty: &Ty) -> bool {
}
}
fn variant_id_for_adt(&self, ctor: &Constructor<Self>, adt: hir_def::AdtId) -> VariantId {
fn variant_id_for_adt(ctor: &Constructor<Self>, adt: hir_def::AdtId) -> Option<VariantId> {
match ctor {
&Variant(id) => id.into(),
Struct | UnionField => {
assert!(!matches!(adt, hir_def::AdtId::EnumId(_)));
match adt {
hir_def::AdtId::EnumId(_) => unreachable!(),
hir_def::AdtId::StructId(id) => id.into(),
hir_def::AdtId::UnionId(id) => id.into(),
}
}
_ => panic!("bad constructor {self:?} for adt {adt:?}"),
&Variant(id) => Some(id.into()),
Struct | UnionField => match adt {
hir_def::AdtId::EnumId(_) => None,
hir_def::AdtId::StructId(id) => Some(id.into()),
hir_def::AdtId::UnionId(id) => Some(id.into()),
},
_ => panic!("bad constructor {ctor:?} for adt {adt:?}"),
}
}
@ -200,7 +197,7 @@ pub(crate) fn lower_pat(&self, pat: &Pat) -> DeconstructedPat<'p> {
Wildcard
}
};
let variant = self.variant_id_for_adt(&ctor, adt.0);
let variant = Self::variant_id_for_adt(&ctor, adt.0).unwrap();
let fields_len = variant.variant_data(self.db.upcast()).fields().len();
// For each field in the variant, we store the relevant index into `self.fields` if any.
let mut field_id_to_id: Vec<Option<usize>> = vec![None; fields_len];
@ -266,7 +263,7 @@ pub(crate) fn hoist_witness_pat(&self, pat: &WitnessPat<'p>) -> Pat {
PatKind::Deref { subpattern: subpatterns.next().unwrap() }
}
TyKind::Adt(adt, substs) => {
let variant = self.variant_id_for_adt(pat.ctor(), adt.0);
let variant = Self::variant_id_for_adt(pat.ctor(), adt.0).unwrap();
let subpatterns = self
.list_variant_nonhidden_fields(pat.ty(), variant)
.zip(subpatterns)
@ -327,7 +324,7 @@ fn ctor_arity(
// patterns. If we're here we can assume this is a box pattern.
1
} else {
let variant = self.variant_id_for_adt(ctor, adt);
let variant = Self::variant_id_for_adt(ctor, adt).unwrap();
self.list_variant_nonhidden_fields(ty, variant).count()
}
}
@ -370,7 +367,7 @@ fn alloc<'a>(cx: &'a MatchCheckCtx<'_>, iter: impl Iterator<Item = Ty>) -> &'a [
let subst_ty = substs.at(Interner, 0).assert_ty_ref(Interner).clone();
alloc(self, once(subst_ty))
} else {
let variant = self.variant_id_for_adt(ctor, adt);
let variant = Self::variant_id_for_adt(ctor, adt).unwrap();
let tys = self.list_variant_nonhidden_fields(ty, variant).map(|(_, ty)| ty);
alloc(self, tys)
}