Auto merge of #103291 - ink-feather-org:typeid_no_struct_match, r=dtolnay

Remove structural match from `TypeId`

As per rust-lang/rust#99189 (comment).

> Removing the structural equality might make sense, but is a breaking change that'd require a libs-api FCP.

rust-lang/rust#99189 (comment)

> Landing this PR now (well, mainly the "remove structural equality" part) would unblock `const fn` `TypeId::of`, since we only postponed that because we were guaranteeing too much.

See also #99189, #101698

Author: bors

core/src/any.rs

@@ -662,12 +662,20 @@ impl dyn Any + Send + Sync {
 /// While `TypeId` implements `Hash`, `PartialOrd`, and `Ord`, it is worth
 /// noting that the hashes and ordering will vary between Rust releases. Beware
 /// of relying on them inside of your code!
-#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Clone, Copy, Debug, Hash, Eq, PartialOrd, Ord)]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct TypeId {
     t: u64,
 }
 
+#[stable(feature = "rust1", since = "1.0.0")]
+impl PartialEq for TypeId {
+    #[inline]
+    fn eq(&self, other: &Self) -> bool {
+        self.t == other.t
+    }
+}
+
 impl TypeId {
     /// Returns the `TypeId` of the type this generic function has been
     /// instantiated with.