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// run-pass
#![allow(unused_variables)]
pub trait Parameters { type SelfRef; }
struct RP<'a> { _marker: std::marker::PhantomData<&'a ()> }
struct BP;
impl<'a> Parameters for RP<'a> { type SelfRef = &'a X<RP<'a>>; }
impl Parameters for BP { type SelfRef = Box<X<BP>>; }
pub struct Y;
pub enum X<P: Parameters> {
Nothing,
SameAgain(P::SelfRef, Y)
}
fn main() {
let bnil: Box<X<BP>> = Box::new(X::Nothing);
let bx: Box<X<BP>> = Box::new(X::SameAgain(bnil, Y));
let rnil: X<RP> = X::Nothing;
let rx: X<RP> = X::SameAgain(&rnil, Y);
}
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