import { Subscriber } from '../Subscriber';
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import { iterator as Symbol_iterator } from '../symbol/iterator';
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export const subscribeToIterable = <T>(iterable: Iterable<T>) => (subscriber: Subscriber<T>) => {
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const iterator = (iterable as any)[Symbol_iterator]();
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do {
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let item: IteratorResult<T>;
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try {
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item = iterator.next();
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} catch (err) {
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subscriber.error(err);
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return subscriber;
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}
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if (item.done) {
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subscriber.complete();
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break;
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}
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subscriber.next(item.value);
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if (subscriber.closed) {
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break;
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}
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} while (true);
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// Finalize the iterator if it happens to be a Generator
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if (typeof iterator.return === 'function') {
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subscriber.add(() => {
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if (iterator.return) {
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iterator.return();
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}
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});
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}
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return subscriber;
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};
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