Question

I have a templated class

template< std::size_t Size >
class Buffer
{
....
};

I’d like to prevent instantiation of this template when the Size argument is zero. i.e. generate a compiler warning for the following.

Buffer< 0 > buf;

but all other variants would work.

Buffer< 10 > buf;

I’m looking at using boost::enable_if_c but I don’t understand how to get it working.

–Update–
I can’t use any c++11 features, unfortunately

Answer 1

Utilizing BOOST_STATIC_ASSERT might be even easier:

#include <boost/static_assert.hpp>

template< std::size_t Size >
class Buffer
{
    BOOST_STATIC_ASSERT(Size != 0);
};


int main()
{
    Buffer<0> b; //Won't compile
    return 0;
}