Unsigned/signed classes?

Is it possible to design a user-defined data type that the designer can also dictate its behavior if declared signed or unsigned (by the user)?

Is it even possible to say something like:

Code:

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    myClass objName;

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and have the option of:

Code:

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    unsigned myClass objName;

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???

use templates.

--
Mats

Quote:

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Originally Posted by matsp

use templates.

--
Mats

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I want to create a 512 -bit data type, this is why I ask...

>unsigned myClass objName;
Not really, but you can get close with template specialization:

Code:

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enum signedness { SIGNED, UNSIGNED };

template <signedness T>
class my_class {};

template<>
class my_class<SIGNED> {
public:
  my_class() { std::cout<<"signed my_class\n"; }
};

template<>
class my_class<UNSIGNED> {
public:
  my_class() { std::cout<<"unsigned my_class\n"; }
};

int main()
{
  my_class<SIGNED> foo;
  my_class<UNSIGNED> bar;
}

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thanx, that should help a bit, no pun intended.