src/test/run-pass/generic-static-methods.rs

   1 // Copyright 2013 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.
   4 //
   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.
  10
  11
  12
  13 trait vec_utils<T> {
  14     fn map_<U, F>(x: &Self, f: F) -> Vec<U> where F: FnMut(&T) -> U;
  15 }
  16
  17 impl<T> vec_utils<T> for Vec<T> {
  18     fn map_<U, F>(x: &Vec<T> , mut f: F) -> Vec<U> where F: FnMut(&T) -> U {
  19         let mut r = Vec::new();
  20         for elt in x {
  21             r.push(f(elt));
  22         }
  23         r
  24     }
  25 }
  26
  27 pub fn main() {
  28     assert_eq!(vec_utils::map_(&vec![1,2,3], |&x| x+1), [2,3,4]);
  29 }