33 lines
1.1 KiB
Rust
33 lines
1.1 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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pure fn pure_borrow(_x: &int, _y: ()) {}
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fn test1(x: @mut ~int) {
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// Here, evaluating the second argument actually invalidates the
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// first borrow, even though it occurs outside of the scope of the
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// borrow!
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pure_borrow(*x, *x = ~5); //~ ERROR illegal borrow unless pure
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//~^ NOTE impure due to assigning to dereference of mutable @ pointer
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}
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fn test2() {
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let mut x = ~1;
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// Same, but for loanable data:
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pure_borrow(x, x = ~5); //~ ERROR assigning to mutable local variable prohibited due to outstanding loan
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//~^ NOTE loan of mutable local variable granted here
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copy x;
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}
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fn main() {
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} |