More Mut tests
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@ -295,4 +295,13 @@ mod test {
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let _b = x.borrow();
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x.with_mut(|x| *x += 1);
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}
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#[test]
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#[should_fail]
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fn discard_doesnt_unborrow() {
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let x = Mut::new(0);
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let _b = x.borrow();
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let _ = _b;
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let _b = x.borrow_mut();
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}
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}
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@ -0,0 +1,18 @@
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// Copyright 2013 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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use std::mutable::Mut;
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fn main() {
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let m = Mut::new(0);
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let mut b = m.borrow_mut();
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let b1 = b.get();
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let b2 = b.get(); //~ ERROR cannot borrow `b` as mutable more than once at a time
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}
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@ -0,0 +1,20 @@
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// Copyright 2013 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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use std::mutable::Mut;
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fn main() {
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let m = Mut::new(0);
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let p;
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{
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let b = m.borrow();
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p = b.get(); //~ ERROR borrowed value does not live long enough
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}
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}
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