How do you specialise a templated function with a templated class?

Question

So i have a templated function:

template<typename T>
int func(const T& input){
  //do stuff
}

And I'd like to specialise it with a templated class(like std::vector) So like this:

template<typename T>
int func(const std::vector<T>& input){
  //do specialised stuff
}

But I don't know how exactly you do it. Thanks!

Answer 1

simply go on

#include <vector>
#include <iostream>  
using namespace std;

template<typename T>
int func(const vector<T>& a){
    for(auto i: a)         //do specialised stuff
        cout<< (i<<1) <<"\n";
    return 0;

}
int main() {

    vector<int> a={9,8,7};
    func(a);
}

18
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14

multiple each array a by 2 (shift left once, << 1)