fn main() i32 {
    /* address-of and postfix deref */
    var x := 42;
    var p := &x;
    var v := p.*;
    if v != 42 { ret 1; }

    /* null pointer */
    var np: *i32 = null;
    if np != null { ret 2; }
    if np == null {} else { ret 3; }

    /* pointer to struct — auto-deref on .field */
    type Point = struct {
        a: i32,
        b: i32,
    };
    var pt: Point;
    pt.a = 10;
    pt.b = 20;
    var pp := &pt;
    if pp.a != 10 { ret 4; }
    if pp.b != 20 { ret 5; }

    ret 0;
}