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