Function countFunc

func.go:78–93

countFunc is a XPath Node Set functions count(node-set).

(arg query)

// countFunc is a XPath Node Set functions count(node-set).
func countFunc(arg query) func(query, iterator) interface{} {
	return func(_ query, t iterator) interface{} {
		var count = 0
		q := functionArgs(arg)
		test := predicate(q)
		switch typ := q.Evaluate(t).(type) {
		case query:
			for node := typ.Select(t); node != nil; node = typ.Select(t) {
				if test(node) {
					count++
				}
			}
		}
		return float64(count)
	}
}

// sumFunc is a XPath Node Set functions sum(node-set).
func sumFunc(arg query) func(query, iterator) interface{} {