rust/src/test/compile-fail/borrowck-bad-nested-calls-move.rs
Alex Crichton 3585c64d09 rustdoc: Change all code-blocks with a script
find src -name '*.rs' | xargs sed -i '' 's/~~~.*{\.rust}/```rust/g'
    find src -name '*.rs' | xargs sed -i '' 's/ ~~~$/ ```/g'
    find src -name '*.rs' | xargs sed -i '' 's/^~~~$/ ```/g'
2013-09-25 14:27:42 -07:00

44 lines
1.0 KiB
Rust

// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// Test that we detect nested calls that could free pointers evaluated
// for earlier arguments.
fn rewrite(v: &mut ~uint) -> uint {
*v = ~22;
**v
}
fn add(v: &uint, w: ~uint) -> uint {
*v + *w
}
fn implicit() {
let mut a = ~1;
// Note the danger here:
//
// the pointer for the first argument has already been
// evaluated, but it gets moved when evaluating the second
// argument!
add(
a,
a); //~ ERROR cannot move
}
fn explicit() {
let mut a = ~1;
add(
&*a,
a); //~ ERROR cannot move
}
fn main() {}