rust/src/test/compile-fail/regions-infer-contravariance-due-to-immutability.rs
Niko Matsakis 3168fe06ff Add manual &self/ and &static/ and /&self declarations that
are currently inferred.  New rules are coming that will require
them to be explicit.  All add some explicit self declarations.
2013-03-06 15:12:57 -05:00

29 lines
807 B
Rust

// 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.
struct contravariant {
f: &'self int
}
fn to_same_lifetime(bi: contravariant<'r>) {
let bj: contravariant<'r> = bi;
}
fn to_shorter_lifetime(bi: contravariant<'r>) {
let bj: contravariant<'blk> = bi;
}
fn to_longer_lifetime(bi: contravariant<'r>) -> contravariant/&static {
bi //~ ERROR mismatched types
}
fn main() {
}