Class ComboVec3

src/ImathTest/testInterop.cpp:115–130

// A class that has *both* subscripting and named members
template <typename T> struct ComboVec3
{
    union
    {
        T elements[3];
        struct
        {
            T x, y, z;
        };
    };

    ComboVec3 (T val = T (0)) : x (val), y (val), z (val) {}
    ~ComboVec3 () = default;
    constexpr T operator[] (int i) const { return elements[i]; }
    T&          operator[] (int i) { return elements[i]; }
};

// A class that has *both* subscripting and named members
template <typename T> struct ComboVec4