31 lines
981 B
Rust
31 lines
981 B
Rust
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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pub trait Paramters { type SelfRef; }
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struct RP<'a> { _marker: std::marker::PhantomData<&'a ()> }
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struct BP;
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impl<'a> Paramters for RP<'a> { type SelfRef = &'a X<RP<'a>>; }
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impl Paramters for BP { type SelfRef = Box<X<BP>>; }
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pub struct Y;
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pub enum X<P: Paramters> {
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Nothing,
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SameAgain(P::SelfRef, Y)
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}
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fn main() {
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let bnil: Box<X<BP>> = Box::new(X::Nothing);
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let bx: Box<X<BP>> = Box::new(X::SameAgain(bnil, Y));
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let rnil: X<RP> = X::Nothing;
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let rx: X<RP> = X::SameAgain(&rnil, Y);
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}
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