Little exple of template specializations

main.cpp

#include <iostream>

struct Worker
{
    template<typename TProcedure>
    void execute(TProcedure p);
};

struct A
{
    int fieldA = 1;
};

struct B
{
    int fieldB = 2;
};

template<>
void Worker::execute<A>(A a)
{
    std::cout << "Print value of A: " << a.fieldA << std::endl;
}

template<>
void Worker::execute<B>(B b)
{
    std::cout << "Print value of B: " << b.fieldB << std::endl;
}

int main()
{
    A a;
    B b;
    Worker w;
    w.execute(a);
    w.execute(b);
}