--- /dev/null
+import { Subscriber } from '../Subscriber';
+import { noop } from '../util/noop';
+import { isFunction } from '../util/isFunction';
+export function tap(nextOrObserver, error, complete) {
+ return function tapOperatorFunction(source) {
+ return source.lift(new DoOperator(nextOrObserver, error, complete));
+ };
+}
+class DoOperator {
+ constructor(nextOrObserver, error, complete) {
+ this.nextOrObserver = nextOrObserver;
+ this.error = error;
+ this.complete = complete;
+ }
+ call(subscriber, source) {
+ return source.subscribe(new TapSubscriber(subscriber, this.nextOrObserver, this.error, this.complete));
+ }
+}
+class TapSubscriber extends Subscriber {
+ constructor(destination, observerOrNext, error, complete) {
+ super(destination);
+ this._tapNext = noop;
+ this._tapError = noop;
+ this._tapComplete = noop;
+ this._tapError = error || noop;
+ this._tapComplete = complete || noop;
+ if (isFunction(observerOrNext)) {
+ this._context = this;
+ this._tapNext = observerOrNext;
+ }
+ else if (observerOrNext) {
+ this._context = observerOrNext;
+ this._tapNext = observerOrNext.next || noop;
+ this._tapError = observerOrNext.error || noop;
+ this._tapComplete = observerOrNext.complete || noop;
+ }
+ }
+ _next(value) {
+ try {
+ this._tapNext.call(this._context, value);
+ }
+ catch (err) {
+ this.destination.error(err);
+ return;
+ }
+ this.destination.next(value);
+ }
+ _error(err) {
+ try {
+ this._tapError.call(this._context, err);
+ }
+ catch (err) {
+ this.destination.error(err);
+ return;
+ }
+ this.destination.error(err);
+ }
+ _complete() {
+ try {
+ this._tapComplete.call(this._context);
+ }
+ catch (err) {
+ this.destination.error(err);
+ return;
+ }
+ return this.destination.complete();
+ }
+}
+//# sourceMappingURL=tap.js.map
\ No newline at end of file