An alternative mechanism for processing integer and 
floating point raw literals is through a variadic template:

template<char...> OutputType operator "" _tuffix();
 
OutputType some_variable = 1234_tuffix;
OutputType another_variable = 2.17_tuffix;

This instantiates the literal processing function as 
operator "" _tuffix<'1', '2', '3', '4'>(). 
In this form, there is no terminating null character to the string. 

The main purpose to doing this is to use C++11's constexpr 
keyword and the compiler to allow the literal to be transformed 
entirely at compile time, assuming OutputType is a 
constexpr-constructable and copyable type, and the literal 
processing function is a constexpr function.