1. Object.opEquals(Object lhs, Object.rhs)

It seems to me that nobody uses it. Why it exists?

2. object.opEquals(TypeInfo lhs, TypeInfo rhs)

It might be used to hack for typeid(x) == typeid(y), but I'm not sure.

That is much ambiguous, and if it's really used, we should move it to static TypeInfo.equals and explicitly use it by the name.

Kenji Hara