35 lines
1022 B
Rust
35 lines
1022 B
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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// Here we check that it is allowed to lend out an element of a
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// (locally rooted) mutable, unique vector, and that we then prevent
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// modifications to the contents.
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fn takes_imm_elt(_v: &int, f: ||) {
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f();
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}
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fn has_mut_vec_and_does_not_try_to_change_it() {
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let mut v = vec!(1, 2, 3);
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takes_imm_elt(v.get(0), || {})
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}
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fn has_mut_vec_but_tries_to_change_it() {
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let mut v = vec!(1, 2, 3);
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takes_imm_elt(
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v.get(0),
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|| { //~ ERROR cannot borrow `v` as mutable
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*v.get_mut(1) = 4;
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})
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}
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fn main() {
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}
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