struct Outer[T] {
mut:
    inner Inner[T]
}

struct Inner[T] {
    val T
}

fn (mut i Inner[T]) next[S](input S) f64 {
    $if S is f32 {
        return 32
    } $else {
        panic('"${S.name}" is not supported')
        return 0
    }
}

fn (mut o Outer[T]) next[S](input S) f64 {
    $if S is f32 {
        return o.inner.next(input)
    } $else {
        panic('"${S.name}" is not supported')
        return 0
    }
}

fn test_generics_method_on_nested_struct() {
    mut outer := Outer[f64]{
        inner: Inner[f64]{
            val: 1.1
        }
    }

    res := outer.next(f32(99.0))
    println(res)
    assert res == 32.0
}