New upstream version 1.12.0+dfsg1

[rustc.git] / src / test / compile-fail / object-safety-mentions-Self.rs

// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// Check that we correctly prevent users from making trait objects
// form traits that make use of `Self` in an argument or return
// position, unless `where Self : Sized` is present..

trait Bar {
    fn bar(&self, x: &Self);
}

trait Baz {
    fn bar(&self) -> Self;
}

trait Quux {
    fn get(&self, s: &Self) -> Self where Self : Sized;
}

fn make_bar<T:Bar>(t: &T) -> &Bar {
        //~^ ERROR E0038
        //~| NOTE method `bar` references the `Self` type in its arguments or return type
        //~| NOTE the trait `Bar` cannot be made into an object
    loop { }
}

fn make_baz<T:Baz>(t: &T) -> &Baz {
        //~^ ERROR E0038
        //~| NOTE method `bar` references the `Self` type in its arguments or return type
        //~| NOTE the trait `Baz` cannot be made into an object
    t
}

fn make_quux<T:Quux>(t: &T) -> &Quux {
    t
}

fn make_quux_explicit<T:Quux>(t: &T) -> &Quux {
    t as &Quux
}

fn main() {
}