61 lines
1.8 KiB
Rust
61 lines
1.8 KiB
Rust
// Copyright 2012-2013 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 lifetime resolver enforces the lifetime name scoping
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// rules correctly in various scenarios.
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struct Foo<'a> {
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x: &'a int
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}
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impl<'a> Foo<'a> {
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// &'a is inherited:
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fn m1(&self, arg: &'a int) { }
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fn m2(&'a self) { }
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fn m3(&self, arg: Foo<'a>) { }
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// &'b is not:
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fn m4(&self, arg: &'b int) { } //~ ERROR undeclared lifetime
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fn m5(&'b self) { } //~ ERROR undeclared lifetime
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fn m6(&self, arg: Foo<'b>) { } //~ ERROR undeclared lifetime
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}
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fn bar<'a>(x: &'a int) {
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// &'a is visible to code:
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let y: &'a int = x;
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// &'a is not visible to *items*:
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type X = Option<&'a int>; //~ ERROR undeclared lifetime
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enum E {
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E1(&'a int) //~ ERROR undeclared lifetime
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}
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struct S {
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f: &'a int //~ ERROR undeclared lifetime
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}
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fn f(a: &'a int) { } //~ ERROR undeclared lifetime
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// &'a CAN be declared on functions and used then:
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fn g<'a>(a: &'a int) { } // OK
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fn h(a: <'a>|&'a int|) { } // OK
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}
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// Test nesting of lifetimes in fn type declarations
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fn fn_types(a: &'a int, //~ ERROR undeclared lifetime
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b: <'a>|a: &'a int,
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b: &'b int, //~ ERROR undeclared lifetime
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c: <'b>|a: &'a int,
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b: &'b int|,
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d: &'b int|, //~ ERROR undeclared lifetime
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c: &'a int) //~ ERROR undeclared lifetime
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{
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}
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pub fn main() {}
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