| // Copyright 2014 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. |
| |
| #![feature(unboxed_closures)] |
| |
| // Tests that we can't move out of an unboxed closure environment |
| // if the upvar is captured by ref or the closure takes self by |
| // reference. |
| |
| fn to_fn<A,F:Fn<A>>(f: F) -> F { f } |
| fn to_fn_mut<A,F:FnMut<A>>(f: F) -> F { f } |
| fn to_fn_once<A,F:FnOnce<A>>(f: F) -> F { f } |
| |
| // FIXME (#22405): Replace `Box::new` with `box` here when/if possible. |
| |
| fn main() { |
| // By-ref cases |
| { |
| let x = Box::new(0); |
| let f = to_fn(|| drop(x)); //~ ERROR cannot move |
| } |
| { |
| let x = Box::new(0); |
| let f = to_fn_mut(|| drop(x)); //~ ERROR cannot move |
| } |
| { |
| let x = Box::new(0); |
| let f = to_fn_once(|| drop(x)); // OK -- FnOnce |
| } |
| // By-value cases |
| { |
| let x = Box::new(0); |
| let f = to_fn(move || drop(x)); //~ ERROR cannot move |
| } |
| { |
| let x = Box::new(0); |
| let f = to_fn_mut(move || drop(x)); //~ ERROR cannot move |
| } |
| { |
| let x = Box::new(0); |
| let f = to_fn_once(move || drop(x)); // this one is ok |
| } |
| } |