text: /* */ 
  "format cjs";
  /** PURE_IMPORTS_START _Observable,_from,_empty PURE_IMPORTS_END */
  import { Observable } from '../Observable';
  import { from } from './from';
  import { EMPTY } from './empty';
  export function using(resourceFactory, observableFactory) {
      return new Observable(function (subscriber) {
          var resource;
          try {
              resource = resourceFactory();
          }
          catch (err) {
              subscriber.error(err);
              return undefined;
          }
          var result;
          try {
              result = observableFactory(resource);
          }
          catch (err) {
              subscriber.error(err);
              return undefined;
          }
          var source = result ? from(result) : EMPTY;
          var subscription = source.subscribe(subscriber);
          return function () {
              subscription.unsubscribe();
              if (resource) {
                  resource.unsubscribe();
              }
          };
      });
  }
  //# sourceMappingURL=using.js.map
  