bitbag

This crate provides [BitBag], a type intended for tracking bitflags defined in a field-less enum. Get started like this: ```rust use bitbag::{BitBag, BitBaggable}; use strum::EnumIter;

[derive(BitBaggable, EnumIter, Clone, Copy)]

[repr(u8)]

enum Flags { A = 0b0001, B = 0b0010, C = 0b0100, } Basic functionality is provided by [`BitBag`] rust let mut bag = BitBag::::newunchecked(0b0011); assert!(bag.isset(Flags::A)); assert!(bag.isset(Flags::B)); assert!(!bag.isset(Flags::C));

bag.set(Flags::C); assert_eq!(*bag, 0b0111);

Deriving [`BitBaggable`] will also give you very ergonomic constructors rust use Flags::*; let bag = A | B | C; assert!(bag.isset(Flags::A)); assert!(bag.isset(Flags::B)); assert!(bag.is_set(Flags::C)); Additionally deriving [`EnumIter`], and [`Copy`] will allow fallible creation, and iteration over the set flags rust // ⬇ this bit is not defined in Flags let result = BitBag::::new(0b1000); assert!(matches!( result, Err(e) if e.given() == 0b1000 ));

let bag = BitBag::::new_unchecked(0b0110); for flag in &bag { match flag { Flags::A => println!("Flag A was set"), Flags::B => println!("Flag B was set"), Flags::C => println!("Flag C was set"), } }; ```