32 lines
893 B
Rust
32 lines
893 B
Rust
// 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 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
|
|
|
|
fn pairs<F>(mut it: F) where F: FnMut((isize, isize)) {
|
|
let mut i: isize = 0;
|
|
let mut j: isize = 0;
|
|
while i < 10 { it((i, j)); i += 1; j += i; }
|
|
}
|
|
|
|
pub fn main() {
|
|
let mut i: isize = 10;
|
|
let mut j: isize = 0;
|
|
pairs(|p| {
|
|
let (_0, _1) = p;
|
|
println!("{}", _0);
|
|
println!("{}", _1);
|
|
assert_eq!(_0 + 10, i);
|
|
i += 1;
|
|
j = _1;
|
|
});
|
|
assert_eq!(j, 45);
|
|
}
|