gistfile1.txt

struct vec4 {
    union {
        struct {
            int x;
            int y;
            int z;
            int w;
        }
        struct {
            int r;
            int g;
            int b;
            int a;
        }
        struct {
            int s;
            int t;
            int u;
            int v;
        }
    }
}