1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
13 #![allow(dead_assignment)]
14 #![allow(unused_variable)]
15 #![allow(unknown_features)]
16 #![feature(box_syntax)]
18 // Should pass region checking.
19 fn ok(f: Box<FnMut(&uint)>) {
20 // Here, g is a function that can accept a uint pointer with
21 // lifetime r, and f is a function that can accept a uint pointer
22 // with any lifetime. The assignment g = f should be OK (i.e.,
23 // f's type should be a subtype of g's type), because f can be
24 // used in any context that expects g's type. But this currently
26 let mut g: Box<for<'r> FnMut(&'r uint)> = box |x| { };
30 // This version is the same as above, except that here, g's type is
32 fn ok_inferred(f: Box<FnMut(&uint)>) {
33 let mut g: Box<for<'r> FnMut(&'r uint)> = box |_| {};