Template Specialization for basic POD only

If you really want only fundamental types and not user-defined POD types then the following should work:

#include <iostream>
#include <boost/type_traits/integral_constant.hpp>
#include <boost/type_traits/is_fundamental.hpp>
#include <boost/type_traits/is_same.hpp>

template<typename T>
struct non_void_fundamental : boost::integral_constant<
    bool,
    boost::is_fundamental<T>::value && !boost::is_same<T, void>::value
>
{ };

template<typename T, bool Enable = non_void_fundamental<T>::value>
struct DoStuff
{
    void operator ()() { std::cout << "Generic\n"; } const
};

template<>
struct DoStuff<T, true>
{
    void operator ()() { std::cout << "POD Type\n"; } const
};

If you also want user-defined POD types, then use boost::is_pod<> instead of non_void_fundamental<> (and if you're using C++11 and doing this for optimization purposes, use std::is_trivially_copyable<> instead).

In C++11, many traits have been added to the standard library, and most seem particularly aimed toward interesting specializations (and notably bitwise manipulations).

The top-level trait you could be interested in is std::is_trivial, however there are many others:

• std::is_trivially_default_constructible
• std::is_trivially_copy_constructible
• std::is_trivially_move_constructible
• std::is_trivially_copyable (can be copied via memcpy)

In general, the Standard has tried to get as finer grained traits as possible so you need not rely on such broad assumptions as is_pod but instead fine-tune your constraints to match what your methods really need.