The bitmatch crate provides tools for packing and unpacking integers as sequences of bits.
Using #[bitmatch] with a let unpacks the bits into separate
single-character variables for each letter you use.
Using bitpack!() re-packs the bits from those single-character variables
into a single integer.
```rust use bitmatch::bitmatch;
fn interleave(n: u8) -> u8 { #[bitmatch] let "xxxxyyyy" = n; bitpack!("xyxyxyxy") }
fn main() { assert_eq!(interleave(0xF0), 0xAA); } ```
You can use #[bitmatch] on a match as well, and it will ensure that the
literal portions match, and bind the variable portions.
```rust use bitmatch::bitmatch;
fn decode(inst: u8) -> String { #[bitmatch] match inst { "00ooaabb" => format!("Op {}, {}, {}", o, a, b), "0100aaii" => format!("Val {}, {}", a, i), "01??????" => format!("Invalid"), "10iiaabb" => format!("Ld {}, {}, {}", a, b, i), "11ii_aabb" => format!("St {}, {}, {}", a, b, i), } } ```