mirror of
https://github.com/rust-lang/rust.git
synced 2024-10-31 06:22:00 +00:00
37 lines
823 B
Rust
37 lines
823 B
Rust
// run-pass
|
|
#![allow(non_camel_case_types)]
|
|
|
|
trait methods {
|
|
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);
|
|
}
|