Function stringJoinFunc

func.go:672–700

string-join is a XPath Node Set functions string-join(node-set, separator).

(q, arg1 query)

// string-join is a XPath Node Set functions string-join(node-set, separator).
func stringJoinFunc(q, arg1 query) func(query, iterator) interface{} {
	return func(_ query, t iterator) interface{} {
		var separator string
		switch v := functionArgs(arg1).Evaluate(t).(type) {
		case string:
			separator = v
		case query:
			node := v.Select(t)
			if node != nil {
				separator = node.Value()
			}
		}

		q = functionArgs(q)
		test := predicate(q)
		var parts []string
		switch v := q.Evaluate(t).(type) {
		case string:
			return v
		case query:
			for node := v.Select(t); node != nil; node = v.Select(t) {
				if test(node) {
					parts = append(parts, node.Value())
				}
			}
		}
		return strings.Join(parts, separator)
	}
}

// lower-case is XPATH function that converts a string to lower case.
func lowerCaseFunc(arg1 query) func(query, iterator) interface{} {