how to query if(T==int) with template class

Question

When I\'m writing a function in a template class how can I find out what my T is?

e.g.

template 
ostream& operator << (os         


        

Answer 1

Since C++11 we have std::is_same:

if (std::is_same::value) ...

It's implemented similar to the suggested trait TypeIsInt suggested in the other answers, but with two types to be compared.