Visual C++ :: Operator Overload Not Defined Error When Type Accessed Through Const Struct

I have a basic vector/point class where I've overloaded a bunch of arithmetical operators:

Code:
#pragma once
class point {
public:
point() {
}
point(float p_x, float p_y, float p_z) : x(p_x), y(p_y), z(p_z)

[Code] ...

I can use it fine like

Code:
point p(50,50,50);
point q(50,50,50);
point t = p * q + q;

However when I put this point type into a struct and try to access the members after passing it through by const reference:

Code:
struct sextic {
point a,b,c,d,e,f,g;
};
inline static sextic sexticDifference(const sextic &p_sextic1, c

[Code] ....

This gives me an "operator not defined" error for compilation.