I am trying to write a size and type generic vector class for math programming. I am having problems with partial specialization.
The problem occurs when I try to specialize a member method of my vector class for given size.
I can provide a simple example:
template <size_t Size, typename Type>
class TestVector
{
public:
inline TestVector (){}
TestVector cross (TestVector const& other) const;
};
template < typename Type >
inline TestVector< 3, Type > TestVector< 3, Type >::cross (TestVector< 3, Type > const& other) const
{
return TestVector< 3, Type >();
}
void test ()
{
TestVector< 3, double > vec0;
TestVector< 3, double > vec1;
vec0.cross(vec1);
}
When trying to compile this simple example I get a compilation error stating the 'cross' specialization does not match an existing declaration:
error C2244: 'TestVector<Size,Type>::cross' : unable to match function definition to an existing declaration
see declaration of 'TestVector<Size,Type>::cross'
definition
'TestVector<3,Type> TestVector<3,Type>::cross(const TestVector<3,Type> &) const'
existing declarations
'TestVector<Size,Type> TestVector<Size,Type>::cross(const TestVector<Size,Type> &) const'
I have tried to declare cross as a template:
template <size_t Size, typename Type>
class TestVector
{
public:
inline TestVector (){}
template < class OtherVec >
TestVector cross (OtherVec const& other) const;
};
template < typename Type >
TestVector< 3, Type > TestVector< 3, Type >::cross< TestVector< 3, Type > > (TestVector< 3, Type > const& other) const
{
return TestVector< 3, Type >();
}
This version passes compilation but fails at link-time:
unresolved external symbol "public: class TestVector<3,double> __thiscall TestVector<3,double>::cross<class TestVector<3,double> >(class TestVector<3,double> const &)const
What am I missing here ?
Thanks,
Florent