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fn main() {
// Many closures can now be passed by-value to multiple functions:
fn call(f: F) { f() }
let hello &＃61; || println!("Hello, world!");
call(hello);
call(hello);

// Many &＃96;Iterator&＃96; combinators are now &＃96;Copy&＃96;/&＃96;Clone&＃96;:
let x &＃61; (1..100).map(|x| x * 5);
let y &＃61; x.map(|x| x - 3); // moves &＃96;x&＃96; by &＃96;Copy&＃96;ing
let _ &＃61; x.chain(y); // moves &＃96;x&＃96; again
let _ &＃61; x.cycle(); // &＃96;.cycle()&＃96; is only possible when &＃96;Self: Clone&＃96;

// Closures which reference data mutably are not &＃96;Copy&＃96;/&＃96;Clone&＃96;:
let mut x &＃61; 0;
let incr_x &＃61; || x &＃43;&＃61; 1;
call(incr_x);
call(incr_x); // ERROR: &＃96;incr_x&＃96; moved in the call above.

// &＃96;move&＃96; closures implement &＃96;Clone&＃96;/&＃96;Copy&＃96; if the values they capture
// implement &＃96;Clone&＃96;/&＃96;Copy&＃96;:
let mut x &＃61; 0;
let print_incr &＃61; move || { println!("{}", x); x &＃43;&＃61; 1; };

fn call_three_times(mut f: F) {
for i in 0..3 {
f();
}
}
call_three_times(print_incr); // prints "0", "1", "2"
call_three_times(print_incr); // prints "0", "1", "2"
}

error[E0277]: the trait bound &＃96;[closure&＃64;a.ru:9:24: 9:33]: std::clone::Clone&＃96; is not satisfied
|
12 | let _ &＃61; x.cycle(); // &＃96;.cycle()&＃96; is only possible when &＃96;Self: Clone&＃96;
| ^^^^^ the trait &＃96;std::clone::Clone&＃96; is not implemented for &＃96;[closure&＃64;a.ru:9:24: 9:33]&＃96;
|
&＃61; note : required because of the requirements on the impl of &＃96;std::clone::Clone&＃96; for &＃96;std::iter::Map, [closure&＃64;a.ru:9:24: 9:33]>&＃96;

error: aborting due to previous error(s)