Question

Suppose there is a tiny class

template<class T1>
class c {
    template<class T>
    class Test {
    public:
        typedef std::vector<T> vetor_type;

        vetor_type some_var;
    };

    void f() {
        Test<int>::vetor_type tt; //error
    }
};

I get an error:

Expected ‘;’ after expression.

Edit: I don’t know why the answer about the typename was deleted, cause it actually helped.
But could someone explain why do i have to use typename if I’m writing this code inside another class template?

Answer 1

Test<T> is dependent on the type used to instantiate c<T1> with so you need to use typename in the definition within foo().

void f() {
    typename Test<int>::vetor_type tt;
}