struct Aa {
    sub Bb
}

struct AaWithAliasType {
    sub Bb
}

type AliasType = Bb

struct Bb {
    a int
}

fn encode_struct[U](val U) {
    $for field in U.fields {
        _ = struct {
            ...val.$(field.name)
        }
    }
}

fn main() {
    aa := Aa{}
    bb := Bb{}
    aa_with_alias_type := AaWithAliasType{}

    encode_struct(aa)
    encode_struct(aa_with_alias_type)

    encode_struct(bb)
}