25 lines
770 B
Rust
25 lines
770 B
Rust
// Copyright 2018 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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#![feature(nll)]
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fn flatten<'a, 'b, T>(x: &'a &'b T) -> &'a T {
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x
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}
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fn main() {
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let mut x = "original";
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let y = &x;
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let z = &y;
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let w = flatten(z);
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x = "modified";
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//~^ ERROR cannot assign to `x` because it is borrowed [E0506]
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println!("{}", w); // prints "modified"
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}
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