46 lines
1.1 KiB
Rust
46 lines
1.1 KiB
Rust
// 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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// Test a "pass-through" object-lifetime-default that produces errors.
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#![allow(dead_code)]
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trait SomeTrait {
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fn dummy(&self) { }
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}
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struct MyBox<T:?Sized> {
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r: Box<T>
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}
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fn deref<T>(ss: &T) -> T {
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// produces the type of a deref without worrying about whether a
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// move out would actually be legal
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loop { }
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}
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fn load0(ss: &MyBox<SomeTrait>) -> MyBox<SomeTrait> {
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deref(ss)
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}
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fn load1<'a,'b>(a: &'a MyBox<SomeTrait>,
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b: &'b MyBox<SomeTrait>)
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-> &'b MyBox<SomeTrait>
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{
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a //~ ERROR E0312
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}
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fn load2<'a>(ss: &MyBox<SomeTrait+'a>) -> MyBox<SomeTrait+'a> {
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load0(ss) //~ ERROR mismatched types
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}
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fn main() {
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}
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