42 lines
1.3 KiB
Rust
42 lines
1.3 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![feature(unboxed_closures, overloaded_calls)]
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// Tests that we can't assign to or mutably borrow upvars from `Fn`
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// closures (issue #17780)
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fn set(x: &mut uint) { *x = 5; }
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fn main() {
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// By-ref captures
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{
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let mut x = 0u;
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let _f = |&:| x = 42; //~ ERROR cannot assign
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let mut y = 0u;
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let _g = |&:| set(&mut y); //~ ERROR cannot borrow
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let mut z = 0u;
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let _h = |&mut:| { set(&mut z); |&:| z = 42; }; //~ ERROR cannot assign
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}
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// By-value captures
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{
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let mut x = 0u;
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let _f = move |&:| x = 42; //~ ERROR cannot assign
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let mut y = 0u;
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let _g = move |&:| set(&mut y); //~ ERROR cannot borrow
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let mut z = 0u;
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let _h = move |&mut:| { set(&mut z); move |&:| z = 42; }; //~ ERROR cannot assign
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}
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}
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