45 lines
1.1 KiB
Rust
45 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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// 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: &fn()) {
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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 = ~[1, 2, 3];
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do takes_imm_elt(&v[0]) {
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}
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}
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fn has_mut_vec_but_tries_to_change_it() {
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let mut v = ~[1, 2, 3];
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do takes_imm_elt(&v[0]) {
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v[1] = 4; //~ ERROR cannot assign
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}
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}
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fn takes_const_elt(_v: &const int, f: &fn()) {
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f();
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}
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fn has_mut_vec_and_tries_to_change_it() {
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let mut v = ~[1, 2, 3];
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do takes_const_elt(&const v[0]) {
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v[1] = 4;
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}
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}
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fn main() {
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}
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