/*
Package bitmask handles a flag-like opt/bitmask system.

See https://yourbasic.org/golang/bitmask-flag-set-clear/ for more information.

To use this, set constants like thus:

	package main

	import (
		"r00t2.io/goutils/bitmask"
	)

	const OPTNONE types.MaskBit = 0
	const (
		OPT1 types.MaskBit = 1 << iota
		OPT2
		OPT3
		// ...
	)

	var MyMask *MaskBit

	func main() {
		MyMask = types.NewMaskBit

		MyMask.AddFlag(OPT1)
		MyMask.AddFlag(OPT3)

		_ = MyMask
	}

This would return true:

	MyMask.HasFlag(OPT1)

As would this:

	MyMask.HasFlag(OPT3)

But this would return false:

	MyMask.HasFlag(OPT2)
*/
package bitmask