| // 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. |
| |
| |
| #![allow(unknown_features)] |
| #![feature(box_syntax, collections)] |
| |
| extern crate collections; |
| |
| use std::collections::HashMap; |
| |
| trait Graph<Node, Edge> { |
| fn f(&self, Edge); |
| fn g(&self, Node); |
| |
| } |
| |
| impl<E> Graph<isize, E> for HashMap<isize, isize> { |
| fn f(&self, _e: E) { |
| panic!(); |
| } |
| fn g(&self, _e: isize) { |
| panic!(); |
| } |
| } |
| |
| pub fn main() { |
| let g : Box<HashMap<isize,isize>> = box HashMap::new(); |
| let _g2 : Box<Graph<isize,isize>> = g as Box<Graph<isize,isize>>; |
| } |
