61 lines
2.2 KiB
Rust
61 lines
2.2 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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// ignore-tidy-linelength
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use std::marker::PhantomData;
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struct Foo<'x> { bar: isize, marker: PhantomData<&'x ()> }
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fn foo1<'a>(x: &Foo) -> &'a isize {
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//~^ HELP: consider using an explicit lifetime parameter as shown: fn foo1<'a>(x: &'a Foo) -> &'a isize
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&x.bar //~ ERROR: cannot infer
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}
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fn foo2<'a, 'b>(x: &'a Foo) -> &'b isize {
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//~^ HELP: consider using an explicit lifetime parameter as shown: fn foo2<'a>(x: &'a Foo) -> &'a isize
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&x.bar //~ ERROR: cannot infer
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}
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fn foo3<'a>(x: &Foo) -> (&'a isize, &'a isize) {
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//~^ HELP: consider using an explicit lifetime parameter as shown: fn foo3<'a>(x: &'a Foo) -> (&'a isize, &'a isize)
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(&x.bar, &x.bar) //~ ERROR: cannot infer
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//~^ ERROR: cannot infer
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}
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fn foo4<'a, 'b>(x: &'a Foo) -> (&'b isize, &'a isize, &'b isize) {
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//~^ HELP: consider using an explicit lifetime parameter as shown: fn foo4<'a>(x: &'a Foo) -> (&'a isize, &'a isize, &'a isize)
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(&x.bar, &x.bar, &x.bar) //~ ERROR: cannot infer
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//~^ ERROR: cannot infer
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}
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struct Cat<'x, T> { cat: &'x isize, t: T }
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struct Dog<'y> { dog: &'y isize }
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fn cat2<'x, 'y>(x: Cat<'x, Dog<'y>>) -> &'x isize {
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//~^ HELP: consider using an explicit lifetime parameter as shown: fn cat2<'x>(x: Cat<'x, Dog<'x>>) -> &'x isize
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x.t.dog //~ ERROR: cannot infer
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}
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struct Baz<'x> {
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bar: &'x isize
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}
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impl<'a> Baz<'a> {
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fn baz2<'b>(&self, x: &isize) -> (&'b isize, &'b isize) {
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//~^ HELP: parameter as shown: fn baz2<'b>(&self, x: &'b isize) -> (&'a isize, &'a isize)
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// The lifetime that gets assigned to `x` seems somewhat random.
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// I have disabled this test for the time being. --pcwalton
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(self.bar, x) //~ ERROR: cannot infer
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//~^ ERROR: cannot infer
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}
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}
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fn main() {}
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