Bits operations with GO

bitmask.go

package main

import (
	"fmt"
)

type Bits uint8

const (
	F0 Bits = 1 << iota
	F1
	F2
)

func Set(b, flag Bits) Bits    { return b | flag }
func Clear(b, flag Bits) Bits  { return b &^ flag }
func Toggle(b, flag Bits) Bits { return b ^ flag }
func Has(b, flag Bits) bool    { return b&flag != 0 }

func main() {
	var b Bits
	b = Set(b, F0)
	b = Toggle(b, F2)
	for i, flag := range []Bits{F0, F1, F2} {
		fmt.Println(i, Has(b, flag))
	}
}