File: mutual-struct-recursion.rs

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struct A<T> {
//~^ ERROR recursive types `A` and `B` have infinite size
    x: T,
    y: B<T>,
}

struct B<T> {
    z: A<T>
}

struct C<T> {
//~^ ERROR recursive types `C` and `D` have infinite size
    x: T,
    y: Option<Option<D<T>>>,
}

struct D<T> {
    z: Option<Option<C<T>>>,
}

fn main() {}