| #![feature(no_core)] |
| #![no_core] |
| |
| #![feature(lang_items)] |
| #[lang = "sized"] |
| pub trait Sized {} |
| |
| trait Hash<H> { |
| fn hash2(&self, hasher: &H) -> u64; |
| } |
| |
| trait Stream { |
| fn input(&mut self, bytes: &[u8]); |
| fn result(&self) -> u64; |
| } |
| |
| trait StreamHasher { |
| type S: Stream; |
| fn stream(&self) -> Self::S; |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| trait StreamHash<H: StreamHasher>: Hash<H> { |
| fn input_stream(&self, stream: &mut H::S); |
| } |
| |
| impl<H: StreamHasher> Hash<H> for u8 { |
| fn hash2(&self, hasher: &H) -> u64 { |
| let mut stream = hasher.stream(); |
| self.input_stream(&mut stream); |
| Stream::result(&stream) |
| } |
| } |
| |
| impl<H: StreamHasher> StreamHash<H> for u8 { |
| fn input_stream(&self, stream: &mut H::S) { |
| Stream::input(stream, &[*self]); |
| } |
| } |
| |
| fn main() {} |
