Method insert

types/objset.go:21–31

initialized lazily insert attempts to insert an object obj into objset s. If s already contains an alternative object alt with the same name, insert leaves s unchanged and returns alt. Otherwise it inserts obj and returns nil.

(obj Object)

// the same name, insert leaves s unchanged and returns alt.
// Otherwise it inserts obj and returns nil.
func (s *objset) insert(obj Object) Object {
	id := obj.Id()
	if alt := (*s)[id]; alt != nil {
		return alt
	}
	if *s == nil {
		*s = make(map[string]Object)
	}
	(*s)[id] = obj
	return nil
}