1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
17 fn plus(&self) -> int;
22 impl plus for uint { fn plus(&self) -> int { *self as int + 20 } }
27 impl plus for ~str { fn plus(&self) -> int { 200 } }
31 fn str(&self) -> ~str;
32 fn multi(&self, f: &fn(uint));
35 impl uint_utils for uint {
36 fn str(&self) -> ~str { uint::to_str(*self) }
37 fn multi(&self, f: &fn(uint)) {
39 while c < *self { f(c); c += 1u; }
44 fn length_(&self, ) -> uint;
45 fn iter_(&self, f: &fn(&T));
46 fn map_<U>(&self, f: &fn(&T) -> U) -> ~[U];
49 impl<T> vec_utils<T> for ~[T] {
50 fn length_(&self) -> uint { self.len() }
51 fn iter_(&self, f: &fn(&T)) { for x in self.iter() { f(x); } }
52 fn map_<U>(&self, f: &fn(&T) -> U) -> ~[U] {
54 for elt in self.iter() {
62 assert_eq!(10u.plus(), 30);
63 assert_eq!((~"hi").plus(), 200);
65 assert_eq!((~[1]).length_().str(), ~"1");
66 assert_eq!((~[3, 4]).map_(|a| *a + 4 )[0], 7);
67 assert_eq!((~[3, 4]).map_::<uint>(|a| *a as uint + 4u )[0], 7u);
69 10u.multi(|_n| x += 2u );