--- /dev/null
+import { Observable } from '../Observable';
+import { subscribeToObservable } from '../util/subscribeToObservable';
+import { InteropObservable, SchedulerLike } from '../types';
+import { scheduleObservable } from '../scheduled/scheduleObservable';
+
+export function fromObservable<T>(input: InteropObservable<T>, scheduler?: SchedulerLike) {
+ if (!scheduler) {
+ return new Observable<T>(subscribeToObservable(input));
+ } else {
+ return scheduleObservable(input, scheduler);
+ }
+}