4583272bf5
Note that the change to the error message in borrowck-use-in-index-lvalue.rs, where we report that `*w` is uninitialized rather than `w`, was unintended fallout from the implementation strategy used here. The change appears harmless to me, but I welcome advice on how to bring back the old message, which was slightly cleaner (i.e. less unintelligible). ---- drive-by: revise compile-fail/borrowck-vec-pattern-move-tail to make it really clear that there is a conflict that must be signaled. (A hypothetical future version of Rust might be able to accept the prior version of the code, since the previously updated index was not actually aliased.)
22 lines
746 B
Rust
22 lines
746 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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fn main() {
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let mut a = [1, 2, 3, 4];
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let t = match a {
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[1, 2, tail..] => tail,
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_ => unreachable!()
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};
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println!("t[0]: {}", t[0]);
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a[2] = 0; //~ ERROR cannot assign to `a[..]` because it is borrowed
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println!("t[0]: {}", t[0]);
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t[0];
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}
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