// 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. fn user(_i: int) {} fn foo() { // Here, i is *moved* into the closure: Not actually OK let mut i = 0; do task::spawn { user(i); //~ ERROR mutable variables cannot be implicitly captured } } fn bar() { // Here, i would be implicitly *copied* but it // is mutable: bad let mut i = 0; while i < 10 { do task::spawn { user(i); //~ ERROR mutable variables cannot be implicitly captured } i += 1; } } fn car() { // Here, i is mutable, but *explicitly* shadowed copied: let mut i = 0; while i < 10 { { let i = i; do task::spawn { user(i); } } i += 1; } } fn main() { }