| // Copyright 2012 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)] |
| |
| #[derive(Copy, Clone)] |
| struct LM { resize_at: usize, size: usize } |
| |
| enum HashMap<K,V> { |
| HashMap_(LM, Vec<(K,V)>) |
| } |
| |
| fn linear_map<K,V>() -> HashMap<K,V> { |
| HashMap::HashMap_(LM{ |
| resize_at: 32, |
| size: 0}, Vec::new()) |
| } |
| |
| impl<K,V> HashMap<K,V> { |
| pub fn len(&mut self) -> usize { |
| match *self { |
| HashMap::HashMap_(ref l, _) => l.size |
| } |
| } |
| } |
| |
| pub fn main() { |
| let mut m: Box<_> = box linear_map::<(),()>(); |
| assert_eq!(m.len(), 0); |
| } |