Function functionArgs

func.go:644–649

https://github.com/antchfx/xpath/issues/43

(q query)

// https://github.com/antchfx/xpath/issues/43
func functionArgs(q query) query {
	if _, ok := q.(*functionQuery); ok {
		return q
	}
	return q.Clone()
}

func reverseFunc(q query, t iterator) func() NodeNavigator {
	var list []NodeNavigator