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···

       
1
       
+
       
---

     

       
2
       
+
       
'wonka': patch

     

       
3
       
+
       
---

     

       
4
       
+
       


     

       
5
       
+
       
Add missing overload definition for `filter`, which allows types to be narrowed, e.g. by specifying a type predicate return type.

     

···

       
231
       
 
       
  passesAsyncSequence(noop);

     

       
232
       
 
       


     

       
233
       
 
       
  it('prevents emissions for which a predicate fails', () => {

     

       
234
       
-
       
    const { source, next } = sources.makeSubject();

     

       
235
       
 
       
    const fn = vi.fn();

     

       
236
       
 
       


     

       
237
       
-
       
    sinks.forEach(fn)(operators.filter(x => !!x)(source));

     

       
0
       
 
       

     

       
0
       
 
       

     

       
238
       
 
       


     

       
239
       
 
       
    next(false);

     

       
240
       
 
       
    expect(fn).not.toHaveBeenCalled();

     

···

       
231
       
 
       
  passesAsyncSequence(noop);

     

       
232
       
 
       


     

       
233
       
 
       
  it('prevents emissions for which a predicate fails', () => {

     

       
234
       
+
       
    const { source, next } = sources.makeSubject<boolean>();

     

       
235
       
 
       
    const fn = vi.fn();

     

       
236
       
 
       


     

       
237
       
+
       
    sinks.forEach((x: true) => {

     

       
238
       
+
       
      fn(x);

     

       
239
       
+
       
    })(operators.filter((x): x is true => !!x)(source));

     

       
240
       
 
       


     

       
241
       
 
       
    next(false);

     

       
242
       
 
       
    expect(fn).not.toHaveBeenCalled();

     

···

       
1
       
-
       
import { Source, Sink, Operator, SignalKind, TalkbackKind, TalkbackFn } from './types';

     

       
2
       
 
       
import { push, start, talkbackPlaceholder } from './helpers';

     

       
3
       
 
       
import { fromArray } from './sources';

     

       
4
       
 
       


     
···

       
268
       
 
       
 * );

     

       
269
       
 
       
 * ```

     

       
270
       
 
       
 */

     

       
271
       
-
       
export function filter<T>(predicate: (value: T) => boolean): Operator<T, T> {

     

       
0
       
 
       

     

       
0
       
 
       

     

       
272
       
 
       
  return source => sink => {

     

       
273
       
 
       
    let talkback = talkbackPlaceholder;

     

       
274
       
 
       
    source(signal => {

     
···

       
280
       
 
       
      } else if (!predicate(signal[0])) {

     

       
281
       
 
       
        talkback(TalkbackKind.Pull);

     

       
282
       
 
       
      } else {

     

       
283
       
-
       
        sink(signal);

     

       
284
       
 
       
      }

     

       
285
       
 
       
    });

     

       
286
       
 
       
  };

     

       
287
       
 
       
}

     

       
0
       
 
       

     

       
0
       
 
       

     

       
288
       
 
       


     

       
289
       
 
       
/** Maps emitted values using the passed mapping function.

     

       
290
       
 
       
 *

     

···

       
1
       
+
       
import { Push, Source, Sink, Operator, SignalKind, TalkbackKind, TalkbackFn } from './types';

     

       
2
       
 
       
import { push, start, talkbackPlaceholder } from './helpers';

     

       
3
       
 
       
import { fromArray } from './sources';

     

       
4
       
 
       


     
···

       
268
       
 
       
 * );

     

       
269
       
 
       
 * ```

     

       
270
       
 
       
 */

     

       
271
       
+
       
function filter<In, Out extends In>(predicate: (value: In) => value is Out): Operator<In, Out>;

     

       
272
       
+
       
function filter<T>(predicate: (value: T) => boolean): Operator<T, T>;

     

       
273
       
+
       
function filter<In, Out>(predicate: (value: In) => boolean): Operator<In, Out> {

     

       
274
       
 
       
  return source => sink => {

     

       
275
       
 
       
    let talkback = talkbackPlaceholder;

     

       
276
       
 
       
    source(signal => {

     
···

       
282
       
 
       
      } else if (!predicate(signal[0])) {

     

       
283
       
 
       
        talkback(TalkbackKind.Pull);

     

       
284
       
 
       
      } else {

     

       
285
       
+
       
        sink(signal as Push<any>);

     

       
286
       
 
       
      }

     

       
287
       
 
       
    });

     

       
288
       
 
       
  };

     

       
289
       
 
       
}

     

       
290
       
+
       


     

       
291
       
+
       
export { filter };

     

       
292
       
 
       


     

       
293
       
 
       
/** Maps emitted values using the passed mapping function.

     

       
294
       
 
       
 *