090040bf40
for `~str`/`~[]`. Note that `~self` still remains, since I forgot to add support for `Box<self>` before the snapshot. How to update your code: * Instead of `~EXPR`, you should write `box EXPR`. * Instead of `~TYPE`, you should write `Box<Type>`. * Instead of `~PATTERN`, you should write `box PATTERN`. [breaking-change]
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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// Test that we detect nested calls that could free pointers evaluated
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// for earlier arguments.
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fn rewrite(v: &mut Box<uint>) -> uint {
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*v = box 22;
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**v
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}
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fn add(v: &uint, w: Box<uint>) -> uint {
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*v + *w
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}
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fn implicit() {
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let mut a = box 1;
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// Note the danger here:
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//
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// the pointer for the first argument has already been
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// evaluated, but it gets moved when evaluating the second
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// argument!
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add(
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a,
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a); //~ ERROR cannot move
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}
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fn explicit() {
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let mut a = box 1;
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add(
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&*a,
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a); //~ ERROR cannot move
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}
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fn main() {}
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