44 lines
1.3 KiB
Rust
44 lines
1.3 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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trait methods {
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fn to_bytes(&self) -> Vec<u8> ;
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}
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impl methods for () {
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fn to_bytes(&self) -> Vec<u8> {
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Vec::from_elem(0, 0u8)
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}
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}
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// the position of this function is significant! - if it comes before methods
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// then it works, if it comes after it then it doesn't!
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fn to_bools(bitv: Storage) -> Vec<bool> {
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Vec::from_fn(8, |i| {
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let w = i / 64;
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let b = i % 64;
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let x = 1u64 & (*bitv.storage.get(w) >> b);
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x == 1u64
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})
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}
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struct Storage { storage: Vec<u64> }
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pub fn main() {
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let bools = vec!(false, false, true, false, false, true, true, false);
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let bools2 = to_bools(Storage{storage: vec!(0b01100100)});
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for i in range(0u, 8) {
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println!("{} => {} vs {}", i, *bools.get(i), *bools2.get(i));
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}
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assert_eq!(bools, bools2);
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}
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