rust/src/test/compile-fail/regions-name-undeclared.rs

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// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// Check that lifetime resolver enforces the lifetime name scoping
// rules correctly in various scenarios.
struct Foo<'a> {
x: &'a int
}
impl<'a> Foo<'a> {
// &'a is inherited:
fn m1(&self, arg: &'a int) { }
fn m2(&'a self) { }
fn m3(&self, arg: Foo<'a>) { }
// &'b is not:
fn m4(&self, arg: &'b int) { } //~ ERROR undeclared lifetime
fn m5(&'b self) { } //~ ERROR undeclared lifetime
fn m6(&self, arg: Foo<'b>) { } //~ ERROR undeclared lifetime
}
fn bar<'a>(x: &'a int) {
// &'a is visible to code:
let y: &'a int = x;
// &'a is not visible to *items*:
type X = Option<&'a int>; //~ ERROR undeclared lifetime
enum E {
E1(&'a int) //~ ERROR undeclared lifetime
}
struct S {
f: &'a int //~ ERROR undeclared lifetime
}
fn f(a: &'a int) { } //~ ERROR undeclared lifetime
// &'a CAN be declared on functions and used then:
fn g<'a>(a: &'a int) { } // OK
fn h(a: &fn<'a>(&'a int)) { } // OK
}
// Test nesting of lifetimes in fn type declarations
fn fn_types(a: &'a int, //~ ERROR undeclared lifetime
b: &fn<'a>(a: &'a int,
b: &'b int, //~ ERROR undeclared lifetime
c: &fn<'b>(a: &'a int,
b: &'b int),
d: &'b int), //~ ERROR undeclared lifetime
c: &'a int) //~ ERROR undeclared lifetime
{
}
pub fn main() {}