54 lines
883 B
Go
54 lines
883 B
Go
/*
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Package bitmask handles a flag-like opt/bitmask system.
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See https://yourbasic.org/golang/bitmask-flag-set-clear/ for more information.
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To use this, set constants like thus:
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package main
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import (
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"r00t2.io/goutils/bitmask"
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)
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const OPTNONE bitmask.MaskBit = 0
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const (
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OPT1 bitmask.MaskBit = 1 << iota
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OPT2
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OPT3
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// ...
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)
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var MyMask *bitmask.MaskBit
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func main() {
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MyMask = bitmask.NewMaskBit()
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MyMask.AddFlag(OPT1)
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MyMask.AddFlag(OPT3)
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_ = MyMask
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}
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This would return true:
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MyMask.HasFlag(OPT1)
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As would this:
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MyMask.HasFlag(OPT3)
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But this would return false:
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MyMask.HasFlag(OPT2)
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If you need something with more flexibility (as always, at the cost of complexity),
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you may be interested in one of the following libraries:
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. github.com/alvaroloes/enumer
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. github.com/abice/go-enum
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. github.com/jeffreyrichter/enum/enum
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*/
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package bitmask
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