rust/src/test/compile-fail/regions-bounds.rs

// Copyright 2012 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 explicit region bounds are allowed on the various
// nominal types (but not on other types) and that they are type
// checked.

struct an_enum<'a>(&'a int);
struct a_class<'a> { x:&'a int }

fn a_fn1<'a,'b>(e: an_enum<'a>) -> an_enum<'b> {
    return e; //~ ERROR mismatched types: expected `an_enum<'b>` but found `an_enum<'a>`
    //~^ ERROR cannot infer an appropriate lifetime
}

fn a_fn3<'a,'b>(e: a_class<'a>) -> a_class<'b> {
    return e; //~ ERROR mismatched types: expected `a_class<'b>` but found `a_class<'a>`
    //~^ ERROR cannot infer an appropriate lifetime
}

fn main() { }