36 lines
886 B
Rust
36 lines
886 B
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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use std::ops::Deref;
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struct MyPtr<'a>(&'a mut uint);
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impl<'a> Deref for MyPtr<'a> {
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type Target = uint;
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fn deref<'b>(&'b self) -> &'b uint { self.0 }
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}
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trait Tr {
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fn poke(&self, s: &mut uint);
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}
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impl Tr for uint {
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fn poke(&self, s: &mut uint) {
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*s = 2;
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}
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}
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fn main() {
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let s = &mut 1u;
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MyPtr(s).poke(s);
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//~^ ERROR cannot borrow `*s` as mutable more than once at a time
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}
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