fix HashEqLike for Box<T>

src/interned.rs

@@ -392,7 +392,7 @@ where
     }
 }
 
-impl<'a, T> HashEqLike<Box<T>> for &'a T
+impl<'a, T> HashEqLike<&'a T> for Box<T>
 where
     T: ?Sized + Hash + Eq,
     Box<T>: From<&'a T>,
@@ -400,7 +400,7 @@ where
     fn hash<H: Hasher>(&self, h: &mut H) {
         Hash::hash(self, &mut *h)
     }
-    fn eq(&self, data: &Box<T>) -> bool {
+    fn eq(&self, data: &&T) -> bool {
         **self == **data
     }
 }

tests/interned-structs.rs

@@ -5,6 +5,11 @@ use expect_test::expect;
 use std::path::{Path, PathBuf};
 use test_log::test;
 
+#[salsa::interned]
+struct InternedBoxed<'db> {
+    data: Box<str>,
+}
+
 #[salsa::interned]
 struct InternedString<'db> {
     data: String,
@@ -73,6 +78,16 @@ fn interning_returns_equal_keys_for_equal_data_multi_field() {
     assert_ne!(s1, new);
 }
 
+#[test]
+fn interning_boxed() {
+    let db = salsa::DatabaseImpl::new();
+
+    assert_eq!(
+        InternedBoxed::new(&db, "Hello"),
+        InternedBoxed::new(&db, Box::from("Hello"))
+    );
+}
+
 #[test]
 fn interning_vec() {
     let db = salsa::DatabaseImpl::new();