af79a5aa7d
`~[T]` in test, libgetopts, compiletest, librustdoc, and libnum.
50 lines
1.1 KiB
Rust
50 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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struct Point {
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x: int,
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y: int,
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}
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fn a() {
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let mut p = vec!(1);
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// Create an immutable pointer into p's contents:
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let q: &int = p.get(0);
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*p.get_mut(0) = 5; //~ ERROR cannot borrow
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println!("{}", *q);
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}
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fn borrow(_x: &[int], _f: ||) {}
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fn b() {
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// here we alias the mutable vector into an imm slice and try to
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// modify the original:
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let mut p = vec!(1);
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borrow(
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p.as_slice(),
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|| *p.get_mut(0) = 5); //~ ERROR cannot borrow `p` as mutable
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}
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fn c() {
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// Legal because the scope of the borrow does not include the
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// modification:
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let mut p = vec!(1);
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borrow(p.as_slice(), ||{});
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*p.get_mut(0) = 5;
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}
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fn main() {
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}
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