package qver

type Option func(*options)

type options struct {
	parent *Version
	UpdateFunc
	state interface{}
}

func parse(opts ...Option) options {
	var o options
	for _, opt := range opts {
		opt(&o)
	}
	return o
}

// Whenever the version changes, bump the parent's version as well.
func Parent(p *Version) Option {
	return func(o *options) {
		o.parent = p
	}
}

// Call f(state) to update the version whenever Version.Get() is called.
func Update(state interface{}, f UpdateFunc) Option {
	return func(o *options) {
		o.UpdateFunc = f
		o.state = state
	}
}