Well, as far as I understand it, `->` works in a similar fashion to `[]`; the difference being that one behaves on arrays while the other on structs.

What @jwatte tried to say is that `->` works like this:

    // foo is struct thingity*
    &foo->bar == foo + offsetof(struct thingity, bar);

The `[]` does a similar thing:

    // s is char*
    *(s+i) == s[i]