58 lines
1.4 KiB
Rust
58 lines
1.4 KiB
Rust
// Copyright 2012-2014 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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#![feature(std_misc)]
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use std::thread;
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fn user(_i: isize) {}
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fn foo() {
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// Here, i is *copied* into the proc (heap closure).
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// Requires allocation. The proc's copy is not mutable.
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let mut i = 0;
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let t = thread::spawn(move|| {
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user(i);
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println!("spawned {}", i)
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});
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i += 1;
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println!("original {}", i);
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t.join();
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}
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fn bar() {
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// Here, the original i has not been moved, only copied, so is still
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// mutable outside of the proc.
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let mut i = 0;
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while i < 10 {
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let t = thread::spawn(move|| {
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user(i);
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});
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i += 1;
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t.join();
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}
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}
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fn car() {
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// Here, i must be shadowed in the proc to be mutable.
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let mut i = 0;
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while i < 10 {
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let t = thread::spawn(move|| {
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let mut i = i;
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i += 1;
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user(i);
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});
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i += 1;
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t.join();
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}
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}
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pub fn main() {}
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