[lerno]

Vector types are built in, which you can do operations on, e.g.

    float[<4>] y = { 1, 2, 3, 4 };
    float[<4>] z = { 2, 2, 2, -100 };
    float[<4>] w = y + z;

It's not completely fleshed out with builtins yet, but will be.