| //@ run-pass | |
| #![allow(non_camel_case_types)] | |
| 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]); | |
| } |