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1 | // Copyright 2014 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. | |
4 | // | |
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. | |
10 | ||
1a4d82fc JJ |
11 | #![feature(unboxed_closures)] |
12 | ||
13 | // Tests that we can't move out of an unboxed closure environment | |
14 | // if the upvar is captured by ref or the closure takes self by | |
15 | // reference. | |
16 | ||
85aaf69f SL |
17 | fn to_fn<A,F:Fn<A>>(f: F) -> F { f } |
18 | fn to_fn_mut<A,F:FnMut<A>>(f: F) -> F { f } | |
19 | fn to_fn_once<A,F:FnOnce<A>>(f: F) -> F { f } | |
20 | ||
c34b1796 AL |
21 | // FIXME (#22405): Replace `Box::new` with `box` here when/if possible. |
22 | ||
1a4d82fc JJ |
23 | fn main() { |
24 | // By-ref cases | |
25 | { | |
c34b1796 | 26 | let x = Box::new(0); |
85aaf69f | 27 | let f = to_fn(|| drop(x)); //~ ERROR cannot move |
1a4d82fc JJ |
28 | } |
29 | { | |
c34b1796 | 30 | let x = Box::new(0); |
85aaf69f | 31 | let f = to_fn_mut(|| drop(x)); //~ ERROR cannot move |
1a4d82fc JJ |
32 | } |
33 | { | |
c34b1796 | 34 | let x = Box::new(0); |
85aaf69f | 35 | let f = to_fn_once(|| drop(x)); // OK -- FnOnce |
1a4d82fc JJ |
36 | } |
37 | // By-value cases | |
38 | { | |
c34b1796 | 39 | let x = Box::new(0); |
85aaf69f | 40 | let f = to_fn(move || drop(x)); //~ ERROR cannot move |
1a4d82fc JJ |
41 | } |
42 | { | |
c34b1796 | 43 | let x = Box::new(0); |
85aaf69f | 44 | let f = to_fn_mut(move || drop(x)); //~ ERROR cannot move |
1a4d82fc JJ |
45 | } |
46 | { | |
c34b1796 | 47 | let x = Box::new(0); |
85aaf69f | 48 | let f = to_fn_once(move || drop(x)); // this one is ok |
1a4d82fc JJ |
49 | } |
50 | } |