46 lines
1.4 KiB
Rust
46 lines
1.4 KiB
Rust
// Copyright 2012 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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// Note: the borrowck analysis is currently flow-insensitive.
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// Therefore, some of these errors are marked as spurious and could be
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// corrected by a simple change to the analysis. The others are
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// either genuine or would require more advanced changes. The latter
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// cases are noted.
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#![feature(box_syntax)]
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fn borrow(_v: &isize) {}
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fn borrow_mut(_v: &mut isize) {}
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fn cond() -> bool { panic!() }
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fn for_func<F>(_f: F) where F: FnOnce() -> bool { panic!() }
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fn produce<T>() -> T { panic!(); }
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fn inc(v: &mut Box<isize>) {
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*v = box (**v + 1);
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}
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fn pre_freeze() {
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// In this instance, the freeze starts before the mut borrow.
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let mut v: Box<_> = box 3;
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let _w = &v;
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borrow_mut(&mut *v); //~ ERROR cannot borrow
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}
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fn post_freeze() {
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// In this instance, the const alias starts after the borrow.
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let mut v: Box<_> = box 3;
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borrow_mut(&mut *v);
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let _w = &v;
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}
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fn main() {}
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