Is there a way of applying a function to each member of a struct in c++?

Question

You have a simple struct, say:

typedef struct rect
{
    int x;
    int y;
    int width;
    int height;
}
rect;

And you want to multiply

Answer 1

If you can re-arrange your struct to take be a union instead, you can do something similar to what Microsoft has done with DirectX.

union Rect
{
    struct
    {
        int x;
        int y;
        int width;
        int height;
    };

    int members[4];
};

void multiply(Rect& rect, int factor)
{
    for(int i = 0; i < 4; i++)
    {
        rect.members[i] *= factor;
    }
}