type MyInt = int
type MyOptInt = ?int
type MyOptStr = ?string
type MySumType = f64 | int | string

struct Foo {
    i            int
    i_opt        ?int
    arr          []int
    arr2         []int = [1, 2]
    dec          f64
    dec_opt      ?f64
    dec_arr      []f64
    i_arr        []int
    str_arr      []string
    opt_int      ?int
    opt_int2     ?int = 3
    myalias      MyInt
    myoptlias    ?MyInt
    myoptlias2   ?MyInt = MyInt(1)
    myoptint     MyOptInt
    mysumtype    MySumType
    mysumtypeopt ?MySumType
    str          string
    str2         string = 'b'
    str_opt      ?string
    str_opt2     ?string = 'a'
    str3         MyOptStr
}

struct Bar {
pub:
    foo ?Foo
}

fn test_main() {
    m := Bar{}
    assert m == Bar{}
}