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