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// Copyright 2012 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.
extern mod std;
trait methods {
fn to_bytes(&self) -> ~[u8];
}
impl methods for () {
fn to_bytes(&self) -> ~[u8] {
vec::from_elem(0, 0)
}
}
// the position of this function is significant! - if it comes before methods
// then it works, if it comes after it then it doesnt!
fn to_bools(bitv: Storage) -> ~[bool] {
vec::from_fn(8, |i| {
let w = i / 64;
let b = i % 64;
let x = 1u64 & (bitv.storage[w] >> b);
x == 1u64
})
}
struct Storage { storage: ~[u64] }
pub fn main() {
let bools = ~[false, false, true, false, false, true, true, false];
let bools2 = to_bools(Storage{storage: ~[0b01100100]});
for uint::range(0, 8) |i| {
io::println(fmt!("%u => %u vs %u", i, bools[i] as uint, bools2[i] as uint));
}
assert!(bools == bools2);
}
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