bitwise pattern matching and extracting
[dependencies]
bitpattern = "0.1.0" let x = 0xacu8; // 10101100
// '0' means the bit must be 0.
// '1' means the bit must be 1.
// '_' can be uses as separator.
assert_eq!(bitpattern!("1010_1100", x), Some(()));
assert_eq!(bitpattern!("1010_0100", x), None);
// '?' means the bit can be 0 or 1.
assert_eq!(bitpattern!("1?10_1?00", x), Some(()));
// Other charactors can be used for extracting.
// 'a' extracts a single bit.
assert_eq!(bitpattern!("1a10_1100", x), Some(0));
assert_eq!(bitpattern!("10a0_1100", x), Some(1));
// Multi-bit extracting by continuous charactors.
assert_eq!(bitpattern!("1aaa_a100", x), Some(5));
// Multiple extracting.
assert_eq!(bitpattern!("1aa0_aa00", x), Some((1, 3)));
// If the extracting fields are adjacent, the different charactors can be used.
assert_eq!(bitpattern!("1aab_bccc", x), Some((1, 1, 4)));Licensed under either of
- Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.
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