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package complete
// Predictor implements a predict method, in which given
// command line arguments returns a list of options it predicts.
type Predictor interface {
Predict(Args) []string
}
// PredictOr unions two predicate functions, so that the result predicate
// returns the union of their predication
func PredictOr(predictors ...Predictor) Predictor {
return PredictFunc(func(a Args) (prediction []string) {
for _, p := range predictors {
if p == nil {
continue
}
prediction = append(prediction, p.Predict(a)...)
}
return
})
}
// PredictFunc determines what terms can follow a command or a flag
// It is used for auto completion, given last - the last word in the already
// in the command line, what words can complete it.
type PredictFunc func(Args) []string
// Predict invokes the predict function and implements the Predictor interface
func (p PredictFunc) Predict(a Args) []string {
if p == nil {
return nil
}
return p(a)
}
// PredictNothing does not expect anything after.
var PredictNothing Predictor
// PredictAnything expects something, but nothing particular, such as a number
// or arbitrary name.
var PredictAnything = PredictFunc(func(Args) []string { return nil })
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