37 lines
862 B
Rust
37 lines
862 B
Rust
//@ run-pass
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#![allow(non_camel_case_types)]
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trait methods { //~ WARN trait `methods` is never used
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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::new()
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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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(0..8).map(|i| {
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let w = i / 64;
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let b = i % 64;
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let x = 1 & (bitv.storage[w] >> b);
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x == 1
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}).collect()
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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 0..8 {
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println!("{} => {} vs {}", i, bools[i], bools2[i]);
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}
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assert_eq!(bools, bools2);
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}
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