Auto merge of #95380 - compiler-errors:unit-destructure-assign, r=nikomatsakis

Fix unit struct/enum variant in destructuring assignment

See https://github.com/rust-lang/rfcs/blob/master/text/2909-destructuring-assignment.md#guide-level-explanation, "including **unit** and tuple structs"

Fixes #94319

1 files changed, 4 insertions, 7 deletions

diff --git a/compiler/rustc_resolve/src/late.rs b/compiler/rustc_resolve/src/late.rs
index ab353128cbc..3db4d4481b4 100644
--- a/compiler/rustc_resolve/src/late.rs
+++ b/compiler/rustc_resolve/src/late.rs
@@ -396,13 +396,10 @@ impl<'a> PathSource<'a> {
                 ) | Res::Local(..)
                     | Res::SelfCtor(..)
             ),
-            PathSource::Pat => matches!(
-                res,
-                Res::Def(
-                    DefKind::Ctor(_, CtorKind::Const) | DefKind::Const | DefKind::AssocConst,
-                    _,
-                ) | Res::SelfCtor(..)
-            ),
+            PathSource::Pat => {
+                res.expected_in_unit_struct_pat()
+                    || matches!(res, Res::Def(DefKind::Const | DefKind::AssocConst, _))
+            }
             PathSource::TupleStruct(..) => res.expected_in_tuple_struct_pat(),
             PathSource::Struct => matches!(
                 res,