type TestSum = int | string | []int

struct Bar {
    y int
}

struct Foo {
mut:
    a TestSum
    b int
    c string
    d Bar
}

fn main() {
    a := Foo{}
    $for f in a.fields {
        $if f.typ is $sumtype {
            $for f2 in f.variants {
                dump(f2)
            }
        } $else $if f.typ is Bar {
            assert true
        }
    }
    $for f in a.variants {
    }
    $for f in T.variants {
    }
}