rust/src/test/compile-fail/borrowck-pat-reassign-binding.rs
Alex Crichton 1237530452 Touch up and rebase previous commits
* Added `// no-pretty-expanded` to pretty-print a test, but not run it through
  the `expanded` variant.
* Removed #[deriving] and other expanded attributes after they are expanded
* Removed hacks around &str and &&str and friends (from both the parser and the
  pretty printer).
* Un-ignored a bunch of tests
2014-05-13 17:24:08 -07:00

25 lines
849 B
Rust

// Copyright 2012-2014 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.
fn main() {
let mut x: Option<int> = None;
match x {
None => {
// Note: on this branch, no borrow has occurred.
x = Some(0);
}
Some(ref i) => {
// But on this branch, `i` is an outstanding borrow
x = Some(*i+1); //~ ERROR cannot assign to `x`
}
}
x.clone(); // just to prevent liveness warnings
}