Get the signed/unsigned variant of an integer template parameter without explicit traits

Question

I am looking to define a template class whose template parameter will always be an integer type. The class will contain two members, one of type T, and the other as

Answer 1

If you can't or don't want to depend on TR1/C++0x features, Boost.TypeTraits also offers you make_unsigned<> et al.

Answer 2

The answer is in <type_traits>

For determining the signed-ness of a type use std::is_signed and std::is_unsigned.

For adding/removing signed-ness, there is std::make_signed and std::make_unsigned.