pub mod parent {
    pub mod child1 {
        pub struct Struct1 {}
    }
    pub mod child2 {
        pub struct Struct2 {}
    }
    pub enum MyEnum {
        Struct1(child1::Struct1),
        Struct2(child2::Struct2),
    }
}

pub fn main() {
    let _foo = parent::MyEnum::Struct1(parent::child1::Struct1 {});
}