template_method_specialization.cpp

//
// Overriding a member method of a template class/struct by defining a specialized implementation.
//

#include <cstdio>
#include <typeinfo>

template<typename T>
struct Foo
{
    void bar()
    {
        std::printf("Base Foo<%s>::bar()\n", typeid(T).name());
    }
};

template<>
void Foo<int>::bar()
{
    std::printf("Specialized Foo<int>::bar()\n");
}

template<>
void Foo<float>::bar()
{
    std::printf("Specialized Foo<float>::bar()\n");
}

int main()
{
    Foo<char>  cFoo;
    Foo<int>   iFoo;
    Foo<float> fFoo;

    cFoo.bar(); // Base implementation
    iFoo.bar(); // Specialized
    fFoo.bar(); // Specialized
}