limiting class template parameters

[Kartsev]

hello!

how to limit class template parameter T in

template <class T> SomeClass { /*.... */ }

to integral numeric types?

thanx a lot :)

hello!

how to limit class template parameter T in

template <class T> SomeClass { /*.... */ }

to integral numeric types?
--
Posted via http://dbforums.com

[Alf P. Steinbach]

On Thu, 16 Oct 2003 19:46:27 -0400, Kartsev <me*********@dbforums.com> wrote:

how to limit class template parameter T in
template <class T> SomeClass { /*.... */ }
to integral numeric types?

#define STATIC_ASSERT( expr ) ... // Your favorite STATIC_ASSERT.

template< typename T >
struct IsIntegralType
{
enum{ yes = (static_cast<T>(1)/2 == 0) };
};

template< typename T >
class SomeClass
{
private:
STATIC_ASSERT( IsIntegralType<T>::yes );
public:
...
};

[Mike Wahler]

"Kartsev" <me*********@dbforums.com> wrote in message
news:34****************@dbforums.com...

hello!

how to limit class template parameter T in

template <class T> SomeClass { /*.... */ }

to integral numeric types?

if(!std::numeric_limits<T>::is_integer)
throw("no no!");

I'm not sure if this restriction can be
imposed at compile time (I can't think
of a way right now.)
-Mike