// 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. // revisions: ast mir //[mir]compile-flags: -Z emit-end-regions -Z borrowck-mir #![allow(unused_variables)] #![allow(unused_assignments)] fn separate_arms() { // Here both arms perform assignments, but only is illegal. let mut x = None; match x { None => { // It is ok to reassign x here, because there is in // fact no outstanding loan of x! x = Some(0); } Some(ref __isize) => { x = Some(1); //[ast]~ ERROR cannot assign //[mir]~^ ERROR cannot assign to `x` because it is borrowed (Ast) //[mir]~| ERROR cannot assign to `x` because it is borrowed (Mir) } } x.clone(); // just to prevent liveness warnings } fn main() {}