c++ template specialization for all subclasses

Question

I need to create a template function like this:

template
void foo(T a)
{
   if (T is a subclass of class Bar)
      do this
   else
      d         


        

Answer 1

I like this clear style:

void foo_detail(T a, const std::true_type&)
{
    //do sub-class thing
}

void foo_detail(T a, const std::false_type&)
{
    //do else
}

void foo(T a)
{
    foo_detail(a, std::is_base_of::value);
}