19dcecb225
check it more easily; also extend object safety to cover sized types as well as static methods. This makes it sufficient so that we can always ensure that `Foo : Foo` holds for any trait `Foo`.
48 lines
1.3 KiB
Rust
48 lines
1.3 KiB
Rust
// Copyright 2014 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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// Check that we correctly prevent users from making trait objects
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// from traits with a `fn(self)` method.
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trait Bar {
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fn bar(self);
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}
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trait Baz {
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fn baz(self: Self);
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}
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fn make_bar<T:Bar>(t: &T) -> &Bar {
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t
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//~^ ERROR `Bar` is not object-safe
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//~| NOTE method `bar` has a receiver type of `Self`
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}
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fn make_bar_explicit<T:Bar>(t: &T) -> &Bar {
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t as &Bar
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//~^ ERROR `Bar` is not object-safe
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//~| NOTE method `bar` has a receiver type of `Self`
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}
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fn make_baz<T:Baz>(t: &T) -> &Baz {
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t
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//~^ ERROR `Baz` is not object-safe
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//~| NOTE method `baz` has a receiver type of `Self`
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}
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fn make_baz_explicit<T:Baz>(t: &T) -> &Baz {
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t as &Baz
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//~^ ERROR `Baz` is not object-safe
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//~| NOTE method `baz` has a receiver type of `Self`
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}
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fn main() {
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}
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