| // Copyright 2013 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. |
| |
| |
| |
| trait vec_utils<T> { |
| fn map_<U, F>(x: &Self, f: F) -> Vec<U> where F: FnMut(&T) -> U; |
| } |
| |
| impl<T> vec_utils<T> for Vec<T> { |
| fn map_<U, F>(x: &Vec<T> , mut f: F) -> Vec<U> where F: FnMut(&T) -> U { |
| let mut r = Vec::new(); |
| for elt in x { |
| r.push(f(elt)); |
| } |
| r |
| } |
| } |
| |
| pub fn main() { |
| assert_eq!(vec_utils::map_(&vec!(1,2,3), |&x| x+1), [2,3,4]); |
| } |
