| // Copyright 2015 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. |
| // |
| |
| #![feature(default_type_parameter_fallback)] |
| |
| use std::marker::PhantomData; |
| |
| pub struct DeterministicHasher; |
| pub struct RandomHasher; |
| |
| |
| pub struct MyHashMap<K, V, H=DeterministicHasher> { |
| data: PhantomData<(K, V, H)> |
| } |
| |
| impl<K, V, H> MyHashMap<K, V, H> { |
| fn new() -> MyHashMap<K, V, H> { |
| MyHashMap { data: PhantomData } |
| } |
| } |
| |
| mod mystd { |
| use super::{MyHashMap, RandomHasher}; |
| pub type HashMap<K, V, H=RandomHasher> = MyHashMap<K, V, H>; |
| } |
| |
| fn try_me<H>(hash_map: mystd::HashMap<i32, i32, H>) {} |
| |
| fn main() { |
| let hash_map = mystd::HashMap::new(); |
| try_me(hash_map); |
| } |