48 lines
1.4 KiB
Rust
48 lines
1.4 KiB
Rust
|
// 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.
|
||
|
|
|
||
|
|
trait Bar {
|
||
|
|
fn bar(&self, x: &Self);
|
||
|
|
}
|
||
|
|
|
||
|
|
trait Baz {
|
||
|
|
fn bar(&self) -> Self;
|
||
|
|
}
|
||
|
|
|
||
|
|
fn make_bar<T:Bar>(t: &T) -> &Bar {
|
||
|
|
t
|
||
|
|
//~^ ERROR `Bar` is not object-safe
|
||
|
|
//~| NOTE method `bar` references the `Self` type in its arguments or return type
|
||
|
|
}
|
||
|
|
|
||
|
|
fn make_bar_explicit<T:Bar>(t: &T) -> &Bar {
|
||
|
|
t as &Bar
|
||
|
|
//~^ ERROR `Bar` is not object-safe
|
||
|
|
//~| NOTE method `bar` references the `Self` type in its arguments or return type
|
||
|
|
}
|
||
|
|
|
||
|
|
fn make_baz<T:Baz>(t: &T) -> &Baz {
|
||
|
|
t
|
||
|
|
//~^ ERROR `Baz` is not object-safe
|
||
|
|
//~| NOTE method `bar` references the `Self` type in its arguments or return type
|
||
|
|
}
|
||
|
|
|
||
|
|
fn make_baz_explicit<T:Baz>(t: &T) -> &Baz {
|
||
|
|
t as &Baz
|
||
|
|
//~^ ERROR `Baz` is not object-safe
|
||
|
|
//~| NOTE method `bar` references the `Self` type in its arguments or return type
|
||
|
|
}
|
||
|
|
|
||
|
|
fn main() {
|
||
|
|
}
|