#include <boost/qvm/quat_operations.hpp>
namespace boost
{
namespace qvm
{
//Only enabled if:
// is_quat<A>::value && is_quat<B>::value &&
template <class A,class B>
typename deduce_quat2<A,B>::type
operator-( A const & a, B const & b );
}
}
A quaternion with elements equal to the elements of b subtracted from the corresponding elements of a.