My template class method returns bad type ?

Question

The template class method "return_self" must return a object of type Class<string>
. But, it returns Class<basic_string<char>> . Why, please check out my code
https://code.sololearn.com/cWVYRFpN37K4/?ref=app

Answer 1

you can pass the Class<Type> argument by const reference,to the operator<< function