| //@ run-pass |
| #![allow(non_camel_case_types)] |
| |
| trait methods { //~ WARN trait `methods` is never used |
| fn to_bytes(&self) -> Vec<u8>; |
| } |
| |
| impl methods for () { |
| fn to_bytes(&self) -> Vec<u8> { |
| Vec::new() |
| } |
| } |
| |
| // the position of this function is significant! - if it comes before methods |
| // then it works, if it comes after it then it doesn't! |
| fn to_bools(bitv: Storage) -> Vec<bool> { |
| (0..8).map(|i| { |
| let w = i / 64; |
| let b = i % 64; |
| let x = 1 & (bitv.storage[w] >> b); |
| x == 1 |
| }).collect() |
| } |
| |
| struct Storage { storage: Vec<u64> } |
| |
| pub fn main() { |
| let bools = vec![false, false, true, false, false, true, true, false]; |
| let bools2 = to_bools(Storage{storage: vec![0b01100100]}); |
| |
| for i in 0..8 { |
| println!("{} => {} vs {}", i, bools[i], bools2[i]); |
| } |
| |
| assert_eq!(bools, bools2); |
| } |
