2014-02-07 19:08:32 +00:00
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// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
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2012-12-11 01:32:48 +00:00
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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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2012-09-18 22:52:21 +00:00
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2014-03-05 23:28:08 +00:00
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2013-01-09 03:37:25 +00:00
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pub trait plus {
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2013-03-13 02:32:14 +00:00
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fn plus(&self) -> int;
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2012-07-11 22:00:40 +00:00
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}
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2011-12-16 09:42:28 +00:00
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mod a {
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2013-01-09 03:37:25 +00:00
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use plus;
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2013-03-14 00:57:30 +00:00
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impl plus for uint { fn plus(&self) -> int { *self as int + 20 } }
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2011-12-16 09:42:28 +00:00
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}
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mod b {
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2013-01-09 03:37:25 +00:00
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use plus;
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2014-05-22 23:57:53 +00:00
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impl plus for String { fn plus(&self) -> int { 200 } }
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2012-07-11 22:00:40 +00:00
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}
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trait uint_utils {
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2014-05-22 23:57:53 +00:00
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fn str(&self) -> String;
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2015-01-02 22:32:54 +00:00
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fn multi<F>(&self, f: F) where F: FnMut(uint);
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2011-12-16 09:42:28 +00:00
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}
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2013-02-14 19:47:00 +00:00
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impl uint_utils for uint {
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2014-05-22 23:57:53 +00:00
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fn str(&self) -> String {
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2014-06-21 10:39:03 +00:00
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self.to_string()
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2014-05-13 00:56:43 +00:00
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}
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2015-01-02 22:32:54 +00:00
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fn multi<F>(&self, mut f: F) where F: FnMut(uint) {
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2015-02-18 10:42:01 +00:00
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let mut c = 0_usize;
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while c < *self { f(c); c += 1_usize; }
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2011-12-18 18:30:40 +00:00
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}
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}
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2012-07-11 22:00:40 +00:00
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trait vec_utils<T> {
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2013-03-13 02:32:14 +00:00
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fn length_(&self, ) -> uint;
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2015-01-02 22:32:54 +00:00
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fn iter_<F>(&self, f: F) where F: FnMut(&T);
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fn map_<U, F>(&self, f: F) -> Vec<U> where F: FnMut(&T) -> U;
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2012-07-11 22:00:40 +00:00
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}
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2014-03-05 22:02:44 +00:00
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impl<T> vec_utils<T> for Vec<T> {
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2013-06-09 01:38:47 +00:00
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fn length_(&self) -> uint { self.len() }
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2015-01-31 17:20:46 +00:00
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fn iter_<F>(&self, mut f: F) where F: FnMut(&T) { for x in self { f(x); } }
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2015-01-02 22:32:54 +00:00
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fn map_<U, F>(&self, mut f: F) -> Vec<U> where F: FnMut(&T) -> U {
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2014-03-05 22:02:44 +00:00
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let mut r = Vec::new();
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2015-01-31 17:20:46 +00:00
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for elt in self {
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2013-06-12 02:13:42 +00:00
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r.push(f(elt));
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}
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2011-12-18 18:30:40 +00:00
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r
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}
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}
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2013-02-02 03:43:17 +00:00
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pub fn main() {
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2015-02-18 10:42:01 +00:00
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assert_eq!(10_usize.plus(), 30);
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2014-05-25 10:17:19 +00:00
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assert_eq!(("hi".to_string()).plus(), 200);
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2011-12-16 09:42:28 +00:00
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2015-01-25 21:05:03 +00:00
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assert_eq!((vec!(1)).length_().str(), "1".to_string());
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let vect = vec!(3, 4).map_(|a| *a + 4);
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2014-10-15 06:05:01 +00:00
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assert_eq!(vect[0], 7);
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2015-02-18 10:42:01 +00:00
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let vect = (vec!(3, 4)).map_::<uint, _>(|a| *a as uint + 4_usize);
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assert_eq!(vect[0], 7_usize);
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let mut x = 0_usize;
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10_usize.multi(|_n| x += 2_usize );
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assert_eq!(x, 20_usize);
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2011-12-18 18:30:40 +00:00
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}
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