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