| //@ 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); | |
| } |