33 lines
766 B
Rust
33 lines
766 B
Rust
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use std;
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trait methods {
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fn to_bytes() -> ~[u8];
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}
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impl (): methods {
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fn to_bytes() -> ~[u8] {
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vec::from_elem(0, 0)
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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 doesnt!
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fn to_bools(bitv: {storage: ~[u64]}) -> ~[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[w] >> b);
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x == 1u64
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})
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}
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fn main() {
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let bools = ~[false, false, true, false, false, true, true, false];
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let bools2 = to_bools({storage: ~[0b01100100]});
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for uint::range(0, 8) |i| {
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io::println(#fmt("%u => %u vs %u", i, bools[i] as uint, bools2[i] as uint));
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}
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assert bools == bools2;
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}
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