sizeof and typedef

[JAI SINGH]

why sizeof and typedef operator can not be overloaded?

[Aceix]

Why the need to overload them???

I told you that most of these non-overloadable operators, deal/work with names(data types) and not their values.

[JLBorges]

typedefis not an operator.

An overloaded operator is evaluated by the call of a function at run-time.
sizeof(e) where e is an expression is evaluated at compile time.