62 lines
1.4 KiB
Rust
62 lines
1.4 KiB
Rust
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// 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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// Test that we can derive lifetime bounds on `Self` from trait
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// inheritance.
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trait Static : 'static { }
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trait Is<'a> : 'a { }
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struct Inv<'a> {
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x: Option<&'a mut &'a int>
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}
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fn check_bound<'a,A:'a>(x: Inv<'a>, a: A) { }
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// In these case, `Self` inherits `'static`.
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trait InheritsFromStatic : 'static {
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fn foo1<'a>(self, x: Inv<'a>) {
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check_bound(x, self)
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}
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}
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trait InheritsFromStaticIndirectly : Static {
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fn foo1<'a>(self, x: Inv<'a>) {
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check_bound(x, self)
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}
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}
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// In these case, `Self` inherits `'a`.
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trait InheritsFromIs<'a> : 'a {
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fn foo(self, x: Inv<'a>) {
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check_bound(x, self)
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}
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}
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trait InheritsFromIsIndirectly<'a> : Is<'a> {
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fn foo(self, x: Inv<'a>) {
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check_bound(x, self)
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}
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}
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// In this case, `Self` inherits nothing.
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trait InheritsFromNothing<'a> {
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fn foo(self, x: Inv<'a>) {
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check_bound(x, self)
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//~^ ERROR parameter type `Self` may not live long enough
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}
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}
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fn main() { }
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