24 lines
420 B
Go
24 lines
420 B
Go
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package flags
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import "sync"
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// Key type for storing flag instances in a context.Context.
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type flagKey string
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// Type to help flags out with only registering/processing once.
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type common struct {
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register sync.Once
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process sync.Once
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}
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func (c *common) RegisterOnce(fn func()) {
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c.register.Do(fn)
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}
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func (c *common) ProcessOnce(fn func() error) (err error) {
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c.process.Do(func() {
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err = fn()
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})
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return err
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}
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