update

node_modules/rxjs/_esm2015/util/subscribeToResult.js

@@ -0,0 +1,77 @@
+import { root } from './root';
+import { isArrayLike } from './isArrayLike';
+import { isPromise } from './isPromise';
+import { isObject } from './isObject';
+import { Observable } from '../Observable';
+import { iterator as Symbol_iterator } from '../symbol/iterator';
+import { InnerSubscriber } from '../InnerSubscriber';
+import { observable as Symbol_observable } from '../symbol/observable';
+export function subscribeToResult(outerSubscriber, result, outerValue, outerIndex) {
+    let destination = new InnerSubscriber(outerSubscriber, outerValue, outerIndex);
+    if (destination.closed) {
+        return null;
+    }
+    if (result instanceof Observable) {
+        if (result._isScalar) {
+            destination.next(result.value);
+            destination.complete();
+            return null;
+        }
+        else {
+            destination.syncErrorThrowable = true;
+            return result.subscribe(destination);
+        }
+    }
+    else if (isArrayLike(result)) {
+        for (let i = 0, len = result.length; i < len && !destination.closed; i++) {
+            destination.next(result[i]);
+        }
+        if (!destination.closed) {
+            destination.complete();
+        }
+    }
+    else if (isPromise(result)) {
+        result.then((value) => {
+            if (!destination.closed) {
+                destination.next(value);
+                destination.complete();
+            }
+        }, (err) => destination.error(err))
+            .then(null, (err) => {
+            // Escaping the Promise trap: globally throw unhandled errors
+            root.setTimeout(() => { throw err; });
+        });
+        return destination;
+    }
+    else if (result && typeof result[Symbol_iterator] === 'function') {
+        const iterator = result[Symbol_iterator]();
+        do {
+            let item = iterator.next();
+            if (item.done) {
+                destination.complete();
+                break;
+            }
+            destination.next(item.value);
+            if (destination.closed) {
+                break;
+            }
+        } while (true);
+    }
+    else if (result && typeof result[Symbol_observable] === 'function') {
+        const obs = result[Symbol_observable]();
+        if (typeof obs.subscribe !== 'function') {
+            destination.error(new TypeError('Provided object does not correctly implement Symbol.observable'));
+        }
+        else {
+            return obs.subscribe(new InnerSubscriber(outerSubscriber, outerValue, outerIndex));
+        }
+    }
+    else {
+        const value = isObject(result) ? 'an invalid object' : `'${result}'`;
+        const msg = `You provided ${value} where a stream was expected.`
+            + ' You can provide an Observable, Promise, Array, or Iterable.';
+        destination.error(new TypeError(msg));
+    }
+    return null;
+}
+//# sourceMappingURL=subscribeToResult.js.map