Macro bitfield

bitfield!() { /* proc-macro */ }

Generate a complex bitfield.

Definitions are similar to bitflags, with some important differences.

Example

use fielder::bitfield;

bitfield! {
    // The struct definition can include a visiblity modifier (`pub(crate)`) and must include
    // a type (`u8`).
    pub(crate) struct Field: u8 {
        // Fields can either span a single bit...
        FlagOne: 0;
        // ...or multiple.
        FieldTwo: 1..2;
        // Fields can have a value assigned...
        FieldThree: 2..3 = 0b11;
        // ...or use a default. Fields covering multiple bits will default to `0`, while
        // fields covering a single bit will default to `1`.
        FieldFourEmpty: 4..5;
        // Fields can also overlap, allowing for an enum-like interface.
        FieldFourPartial: 4..5 = 0b10;
        // Fields act as "counters" when the value is "!0", allowing for the exact bit value
        // to be get/set
        Rest: 6..7 = !0;
    }
}