GCC error: explicit specialization in non-namespace scope

Question

I am trying to port the following code. I know the standard doesn\'t allow explicit specialization in non-namescape scope and I should use overloading, but I just can\'t fin

Answer 1

Define the specialization outside the class as:

template <> 
bool VarData::IsTypeOf < int > (int index) const 
{  //^^^^^^^^^ don't forget this! 
     return false;
}

template <> 
bool VarData::IsTypeOf < double > (int index) const 
{   //^^^^^^^ don't forget this!
     return false;
}

Answer 2

You just have to move your specializations of the member templates outside of the class body.

class VarData
{
public:
    template < typename T > bool IsTypeOf (int index) const
    {
        return IsTypeOf_f<T>::IsTypeOf(this, index);
    }
};

template <> bool VarData::IsTypeOf < int > (int index) const
{
    return false;
}

template <> bool VarData::IsTypeOf < double > (int index) const
{
    return false;
}