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.
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.
11 #![allow(unknown_features)]
12 #![feature(box_syntax)]
14 extern crate collections;
16 use std::collections::HashMap;
18 trait Graph<Node, Edge> {
24 impl<E> Graph<int, E> for HashMap<int, int> {
28 fn g(&self, _e: int) {
34 let g : Box<HashMap<int,int>> = box HashMap::new();
35 let _g2 : Box<Graph<int,int>> = g as Box<Graph<int,int>>;