1 | ;
|
2 | var __extends = (this && this.__extends) || (function () {
|
3 | var extendStatics = function (d, b) {
|
4 | extendStatics = Object.setPrototypeOf ||
|
5 | ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
|
6 | function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
|
7 | return extendStatics(d, b);
|
8 | };
|
9 | return function (d, b) {
|
10 | extendStatics(d, b);
|
11 | function __() { this.constructor = d; }
|
12 | d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
|
13 | };
|
14 | })();
|
15 | Object.defineProperty(exports, "__esModule", { value: true });
|
16 | exports.NO_IL = exports.NO = exports.MemoryStream = exports.Stream = void 0;
|
17 | var ponyfill_1 = require("symbol-observable/ponyfill");
|
18 | var globalthis_1 = require("globalthis");
|
19 | var $$observable = ponyfill_1.default(globalthis_1.getPolyfill());
|
20 | var NO = {};
|
21 | exports.NO = NO;
|
22 | function noop() { }
|
23 | function cp(a) {
|
24 | var l = a.length;
|
25 | var b = Array(l);
|
26 | for (var i = 0; i < l; ++i)
|
27 | b[i] = a[i];
|
28 | return b;
|
29 | }
|
30 | function and(f1, f2) {
|
31 | return function andFn(t) {
|
32 | return f1(t) && f2(t);
|
33 | };
|
34 | }
|
35 | function _try(c, t, u) {
|
36 | try {
|
37 | return c.f(t);
|
38 | }
|
39 | catch (e) {
|
40 | u._e(e);
|
41 | return NO;
|
42 | }
|
43 | }
|
44 | var NO_IL = {
|
45 | _n: noop,
|
46 | _e: noop,
|
47 | _c: noop,
|
48 | };
|
49 | exports.NO_IL = NO_IL;
|
50 | // mutates the input
|
51 | function internalizeProducer(producer) {
|
52 | producer._start = function _start(il) {
|
53 | il.next = il._n;
|
54 | il.error = il._e;
|
55 | il.complete = il._c;
|
56 | this.start(il);
|
57 | };
|
58 | producer._stop = producer.stop;
|
59 | }
|
60 | var StreamSub = /** @class */ (function () {
|
61 | function StreamSub(_stream, _listener) {
|
62 | this._stream = _stream;
|
63 | this._listener = _listener;
|
64 | }
|
65 | StreamSub.prototype.unsubscribe = function () {
|
66 | this._stream._remove(this._listener);
|
67 | };
|
68 | return StreamSub;
|
69 | }());
|
70 | var Observer = /** @class */ (function () {
|
71 | function Observer(_listener) {
|
72 | this._listener = _listener;
|
73 | }
|
74 | Observer.prototype.next = function (value) {
|
75 | this._listener._n(value);
|
76 | };
|
77 | Observer.prototype.error = function (err) {
|
78 | this._listener._e(err);
|
79 | };
|
80 | Observer.prototype.complete = function () {
|
81 | this._listener._c();
|
82 | };
|
83 | return Observer;
|
84 | }());
|
85 | var FromObservable = /** @class */ (function () {
|
86 | function FromObservable(observable) {
|
87 | this.type = 'fromObservable';
|
88 | this.ins = observable;
|
89 | this.active = false;
|
90 | }
|
91 | FromObservable.prototype._start = function (out) {
|
92 | this.out = out;
|
93 | this.active = true;
|
94 | this._sub = this.ins.subscribe(new Observer(out));
|
95 | if (!this.active)
|
96 | this._sub.unsubscribe();
|
97 | };
|
98 | FromObservable.prototype._stop = function () {
|
99 | if (this._sub)
|
100 | this._sub.unsubscribe();
|
101 | this.active = false;
|
102 | };
|
103 | return FromObservable;
|
104 | }());
|
105 | var Merge = /** @class */ (function () {
|
106 | function Merge(insArr) {
|
107 | this.type = 'merge';
|
108 | this.insArr = insArr;
|
109 | this.out = NO;
|
110 | this.ac = 0;
|
111 | }
|
112 | Merge.prototype._start = function (out) {
|
113 | this.out = out;
|
114 | var s = this.insArr;
|
115 | var L = s.length;
|
116 | this.ac = L;
|
117 | for (var i = 0; i < L; i++)
|
118 | s[i]._add(this);
|
119 | };
|
120 | Merge.prototype._stop = function () {
|
121 | var s = this.insArr;
|
122 | var L = s.length;
|
123 | for (var i = 0; i < L; i++)
|
124 | s[i]._remove(this);
|
125 | this.out = NO;
|
126 | };
|
127 | Merge.prototype._n = function (t) {
|
128 | var u = this.out;
|
129 | if (u === NO)
|
130 | return;
|
131 | u._n(t);
|
132 | };
|
133 | Merge.prototype._e = function (err) {
|
134 | var u = this.out;
|
135 | if (u === NO)
|
136 | return;
|
137 | u._e(err);
|
138 | };
|
139 | Merge.prototype._c = function () {
|
140 | if (--this.ac <= 0) {
|
141 | var u = this.out;
|
142 | if (u === NO)
|
143 | return;
|
144 | u._c();
|
145 | }
|
146 | };
|
147 | return Merge;
|
148 | }());
|
149 | var CombineListener = /** @class */ (function () {
|
150 | function CombineListener(i, out, p) {
|
151 | this.i = i;
|
152 | this.out = out;
|
153 | this.p = p;
|
154 | p.ils.push(this);
|
155 | }
|
156 | CombineListener.prototype._n = function (t) {
|
157 | var p = this.p, out = this.out;
|
158 | if (out === NO)
|
159 | return;
|
160 | if (p.up(t, this.i)) {
|
161 | var b = cp(p.vals);
|
162 | out._n(b);
|
163 | }
|
164 | };
|
165 | CombineListener.prototype._e = function (err) {
|
166 | var out = this.out;
|
167 | if (out === NO)
|
168 | return;
|
169 | out._e(err);
|
170 | };
|
171 | CombineListener.prototype._c = function () {
|
172 | var p = this.p;
|
173 | if (p.out === NO)
|
174 | return;
|
175 | if (--p.Nc === 0)
|
176 | p.out._c();
|
177 | };
|
178 | return CombineListener;
|
179 | }());
|
180 | var Combine = /** @class */ (function () {
|
181 | function Combine(insArr) {
|
182 | this.type = 'combine';
|
183 | this.insArr = insArr;
|
184 | this.out = NO;
|
185 | this.ils = [];
|
186 | this.Nc = this.Nn = 0;
|
187 | this.vals = [];
|
188 | }
|
189 | Combine.prototype.up = function (t, i) {
|
190 | var v = this.vals[i];
|
191 | var Nn = !this.Nn ? 0 : v === NO ? --this.Nn : this.Nn;
|
192 | this.vals[i] = t;
|
193 | return Nn === 0;
|
194 | };
|
195 | Combine.prototype._start = function (out) {
|
196 | this.out = out;
|
197 | var s = this.insArr;
|
198 | var n = this.Nc = this.Nn = s.length;
|
199 | var vals = this.vals = new Array(n);
|
200 | if (n === 0) {
|
201 | out._n([]);
|
202 | out._c();
|
203 | }
|
204 | else {
|
205 | for (var i = 0; i < n; i++) {
|
206 | vals[i] = NO;
|
207 | s[i]._add(new CombineListener(i, out, this));
|
208 | }
|
209 | }
|
210 | };
|
211 | Combine.prototype._stop = function () {
|
212 | var s = this.insArr;
|
213 | var n = s.length;
|
214 | var ils = this.ils;
|
215 | for (var i = 0; i < n; i++)
|
216 | s[i]._remove(ils[i]);
|
217 | this.out = NO;
|
218 | this.ils = [];
|
219 | this.vals = [];
|
220 | };
|
221 | return Combine;
|
222 | }());
|
223 | var FromArray = /** @class */ (function () {
|
224 | function FromArray(a) {
|
225 | this.type = 'fromArray';
|
226 | this.a = a;
|
227 | }
|
228 | FromArray.prototype._start = function (out) {
|
229 | var a = this.a;
|
230 | for (var i = 0, n = a.length; i < n; i++)
|
231 | out._n(a[i]);
|
232 | out._c();
|
233 | };
|
234 | FromArray.prototype._stop = function () {
|
235 | };
|
236 | return FromArray;
|
237 | }());
|
238 | var FromPromise = /** @class */ (function () {
|
239 | function FromPromise(p) {
|
240 | this.type = 'fromPromise';
|
241 | this.on = false;
|
242 | this.p = p;
|
243 | }
|
244 | FromPromise.prototype._start = function (out) {
|
245 | var prod = this;
|
246 | this.on = true;
|
247 | this.p.then(function (v) {
|
248 | if (prod.on) {
|
249 | out._n(v);
|
250 | out._c();
|
251 | }
|
252 | }, function (e) {
|
253 | out._e(e);
|
254 | }).then(noop, function (err) {
|
255 | setTimeout(function () { throw err; });
|
256 | });
|
257 | };
|
258 | FromPromise.prototype._stop = function () {
|
259 | this.on = false;
|
260 | };
|
261 | return FromPromise;
|
262 | }());
|
263 | var Periodic = /** @class */ (function () {
|
264 | function Periodic(period) {
|
265 | this.type = 'periodic';
|
266 | this.period = period;
|
267 | this.intervalID = -1;
|
268 | this.i = 0;
|
269 | }
|
270 | Periodic.prototype._start = function (out) {
|
271 | var self = this;
|
272 | function intervalHandler() { out._n(self.i++); }
|
273 | this.intervalID = setInterval(intervalHandler, this.period);
|
274 | };
|
275 | Periodic.prototype._stop = function () {
|
276 | if (this.intervalID !== -1)
|
277 | clearInterval(this.intervalID);
|
278 | this.intervalID = -1;
|
279 | this.i = 0;
|
280 | };
|
281 | return Periodic;
|
282 | }());
|
283 | var Debug = /** @class */ (function () {
|
284 | function Debug(ins, arg) {
|
285 | this.type = 'debug';
|
286 | this.ins = ins;
|
287 | this.out = NO;
|
288 | this.s = noop;
|
289 | this.l = '';
|
290 | if (typeof arg === 'string')
|
291 | this.l = arg;
|
292 | else if (typeof arg === 'function')
|
293 | this.s = arg;
|
294 | }
|
295 | Debug.prototype._start = function (out) {
|
296 | this.out = out;
|
297 | this.ins._add(this);
|
298 | };
|
299 | Debug.prototype._stop = function () {
|
300 | this.ins._remove(this);
|
301 | this.out = NO;
|
302 | };
|
303 | Debug.prototype._n = function (t) {
|
304 | var u = this.out;
|
305 | if (u === NO)
|
306 | return;
|
307 | var s = this.s, l = this.l;
|
308 | if (s !== noop) {
|
309 | try {
|
310 | s(t);
|
311 | }
|
312 | catch (e) {
|
313 | u._e(e);
|
314 | }
|
315 | }
|
316 | else if (l)
|
317 | console.log(l + ':', t);
|
318 | else
|
319 | console.log(t);
|
320 | u._n(t);
|
321 | };
|
322 | Debug.prototype._e = function (err) {
|
323 | var u = this.out;
|
324 | if (u === NO)
|
325 | return;
|
326 | u._e(err);
|
327 | };
|
328 | Debug.prototype._c = function () {
|
329 | var u = this.out;
|
330 | if (u === NO)
|
331 | return;
|
332 | u._c();
|
333 | };
|
334 | return Debug;
|
335 | }());
|
336 | var Drop = /** @class */ (function () {
|
337 | function Drop(max, ins) {
|
338 | this.type = 'drop';
|
339 | this.ins = ins;
|
340 | this.out = NO;
|
341 | this.max = max;
|
342 | this.dropped = 0;
|
343 | }
|
344 | Drop.prototype._start = function (out) {
|
345 | this.out = out;
|
346 | this.dropped = 0;
|
347 | this.ins._add(this);
|
348 | };
|
349 | Drop.prototype._stop = function () {
|
350 | this.ins._remove(this);
|
351 | this.out = NO;
|
352 | };
|
353 | Drop.prototype._n = function (t) {
|
354 | var u = this.out;
|
355 | if (u === NO)
|
356 | return;
|
357 | if (this.dropped++ >= this.max)
|
358 | u._n(t);
|
359 | };
|
360 | Drop.prototype._e = function (err) {
|
361 | var u = this.out;
|
362 | if (u === NO)
|
363 | return;
|
364 | u._e(err);
|
365 | };
|
366 | Drop.prototype._c = function () {
|
367 | var u = this.out;
|
368 | if (u === NO)
|
369 | return;
|
370 | u._c();
|
371 | };
|
372 | return Drop;
|
373 | }());
|
374 | var EndWhenListener = /** @class */ (function () {
|
375 | function EndWhenListener(out, op) {
|
376 | this.out = out;
|
377 | this.op = op;
|
378 | }
|
379 | EndWhenListener.prototype._n = function () {
|
380 | this.op.end();
|
381 | };
|
382 | EndWhenListener.prototype._e = function (err) {
|
383 | this.out._e(err);
|
384 | };
|
385 | EndWhenListener.prototype._c = function () {
|
386 | this.op.end();
|
387 | };
|
388 | return EndWhenListener;
|
389 | }());
|
390 | var EndWhen = /** @class */ (function () {
|
391 | function EndWhen(o, ins) {
|
392 | this.type = 'endWhen';
|
393 | this.ins = ins;
|
394 | this.out = NO;
|
395 | this.o = o;
|
396 | this.oil = NO_IL;
|
397 | }
|
398 | EndWhen.prototype._start = function (out) {
|
399 | this.out = out;
|
400 | this.o._add(this.oil = new EndWhenListener(out, this));
|
401 | this.ins._add(this);
|
402 | };
|
403 | EndWhen.prototype._stop = function () {
|
404 | this.ins._remove(this);
|
405 | this.o._remove(this.oil);
|
406 | this.out = NO;
|
407 | this.oil = NO_IL;
|
408 | };
|
409 | EndWhen.prototype.end = function () {
|
410 | var u = this.out;
|
411 | if (u === NO)
|
412 | return;
|
413 | u._c();
|
414 | };
|
415 | EndWhen.prototype._n = function (t) {
|
416 | var u = this.out;
|
417 | if (u === NO)
|
418 | return;
|
419 | u._n(t);
|
420 | };
|
421 | EndWhen.prototype._e = function (err) {
|
422 | var u = this.out;
|
423 | if (u === NO)
|
424 | return;
|
425 | u._e(err);
|
426 | };
|
427 | EndWhen.prototype._c = function () {
|
428 | this.end();
|
429 | };
|
430 | return EndWhen;
|
431 | }());
|
432 | var Filter = /** @class */ (function () {
|
433 | function Filter(passes, ins) {
|
434 | this.type = 'filter';
|
435 | this.ins = ins;
|
436 | this.out = NO;
|
437 | this.f = passes;
|
438 | }
|
439 | Filter.prototype._start = function (out) {
|
440 | this.out = out;
|
441 | this.ins._add(this);
|
442 | };
|
443 | Filter.prototype._stop = function () {
|
444 | this.ins._remove(this);
|
445 | this.out = NO;
|
446 | };
|
447 | Filter.prototype._n = function (t) {
|
448 | var u = this.out;
|
449 | if (u === NO)
|
450 | return;
|
451 | var r = _try(this, t, u);
|
452 | if (r === NO || !r)
|
453 | return;
|
454 | u._n(t);
|
455 | };
|
456 | Filter.prototype._e = function (err) {
|
457 | var u = this.out;
|
458 | if (u === NO)
|
459 | return;
|
460 | u._e(err);
|
461 | };
|
462 | Filter.prototype._c = function () {
|
463 | var u = this.out;
|
464 | if (u === NO)
|
465 | return;
|
466 | u._c();
|
467 | };
|
468 | return Filter;
|
469 | }());
|
470 | var FlattenListener = /** @class */ (function () {
|
471 | function FlattenListener(out, op) {
|
472 | this.out = out;
|
473 | this.op = op;
|
474 | }
|
475 | FlattenListener.prototype._n = function (t) {
|
476 | this.out._n(t);
|
477 | };
|
478 | FlattenListener.prototype._e = function (err) {
|
479 | this.out._e(err);
|
480 | };
|
481 | FlattenListener.prototype._c = function () {
|
482 | this.op.inner = NO;
|
483 | this.op.less();
|
484 | };
|
485 | return FlattenListener;
|
486 | }());
|
487 | var Flatten = /** @class */ (function () {
|
488 | function Flatten(ins) {
|
489 | this.type = 'flatten';
|
490 | this.ins = ins;
|
491 | this.out = NO;
|
492 | this.open = true;
|
493 | this.inner = NO;
|
494 | this.il = NO_IL;
|
495 | }
|
496 | Flatten.prototype._start = function (out) {
|
497 | this.out = out;
|
498 | this.open = true;
|
499 | this.inner = NO;
|
500 | this.il = NO_IL;
|
501 | this.ins._add(this);
|
502 | };
|
503 | Flatten.prototype._stop = function () {
|
504 | this.ins._remove(this);
|
505 | if (this.inner !== NO)
|
506 | this.inner._remove(this.il);
|
507 | this.out = NO;
|
508 | this.open = true;
|
509 | this.inner = NO;
|
510 | this.il = NO_IL;
|
511 | };
|
512 | Flatten.prototype.less = function () {
|
513 | var u = this.out;
|
514 | if (u === NO)
|
515 | return;
|
516 | if (!this.open && this.inner === NO)
|
517 | u._c();
|
518 | };
|
519 | Flatten.prototype._n = function (s) {
|
520 | var u = this.out;
|
521 | if (u === NO)
|
522 | return;
|
523 | var _a = this, inner = _a.inner, il = _a.il;
|
524 | if (inner !== NO && il !== NO_IL)
|
525 | inner._remove(il);
|
526 | (this.inner = s)._add(this.il = new FlattenListener(u, this));
|
527 | };
|
528 | Flatten.prototype._e = function (err) {
|
529 | var u = this.out;
|
530 | if (u === NO)
|
531 | return;
|
532 | u._e(err);
|
533 | };
|
534 | Flatten.prototype._c = function () {
|
535 | this.open = false;
|
536 | this.less();
|
537 | };
|
538 | return Flatten;
|
539 | }());
|
540 | var Fold = /** @class */ (function () {
|
541 | function Fold(f, seed, ins) {
|
542 | var _this = this;
|
543 | this.type = 'fold';
|
544 | this.ins = ins;
|
545 | this.out = NO;
|
546 | this.f = function (t) { return f(_this.acc, t); };
|
547 | this.acc = this.seed = seed;
|
548 | }
|
549 | Fold.prototype._start = function (out) {
|
550 | this.out = out;
|
551 | this.acc = this.seed;
|
552 | out._n(this.acc);
|
553 | this.ins._add(this);
|
554 | };
|
555 | Fold.prototype._stop = function () {
|
556 | this.ins._remove(this);
|
557 | this.out = NO;
|
558 | this.acc = this.seed;
|
559 | };
|
560 | Fold.prototype._n = function (t) {
|
561 | var u = this.out;
|
562 | if (u === NO)
|
563 | return;
|
564 | var r = _try(this, t, u);
|
565 | if (r === NO)
|
566 | return;
|
567 | u._n(this.acc = r);
|
568 | };
|
569 | Fold.prototype._e = function (err) {
|
570 | var u = this.out;
|
571 | if (u === NO)
|
572 | return;
|
573 | u._e(err);
|
574 | };
|
575 | Fold.prototype._c = function () {
|
576 | var u = this.out;
|
577 | if (u === NO)
|
578 | return;
|
579 | u._c();
|
580 | };
|
581 | return Fold;
|
582 | }());
|
583 | var Last = /** @class */ (function () {
|
584 | function Last(ins) {
|
585 | this.type = 'last';
|
586 | this.ins = ins;
|
587 | this.out = NO;
|
588 | this.has = false;
|
589 | this.val = NO;
|
590 | }
|
591 | Last.prototype._start = function (out) {
|
592 | this.out = out;
|
593 | this.has = false;
|
594 | this.ins._add(this);
|
595 | };
|
596 | Last.prototype._stop = function () {
|
597 | this.ins._remove(this);
|
598 | this.out = NO;
|
599 | this.val = NO;
|
600 | };
|
601 | Last.prototype._n = function (t) {
|
602 | this.has = true;
|
603 | this.val = t;
|
604 | };
|
605 | Last.prototype._e = function (err) {
|
606 | var u = this.out;
|
607 | if (u === NO)
|
608 | return;
|
609 | u._e(err);
|
610 | };
|
611 | Last.prototype._c = function () {
|
612 | var u = this.out;
|
613 | if (u === NO)
|
614 | return;
|
615 | if (this.has) {
|
616 | u._n(this.val);
|
617 | u._c();
|
618 | }
|
619 | else
|
620 | u._e(new Error('last() failed because input stream completed'));
|
621 | };
|
622 | return Last;
|
623 | }());
|
624 | var MapOp = /** @class */ (function () {
|
625 | function MapOp(project, ins) {
|
626 | this.type = 'map';
|
627 | this.ins = ins;
|
628 | this.out = NO;
|
629 | this.f = project;
|
630 | }
|
631 | MapOp.prototype._start = function (out) {
|
632 | this.out = out;
|
633 | this.ins._add(this);
|
634 | };
|
635 | MapOp.prototype._stop = function () {
|
636 | this.ins._remove(this);
|
637 | this.out = NO;
|
638 | };
|
639 | MapOp.prototype._n = function (t) {
|
640 | var u = this.out;
|
641 | if (u === NO)
|
642 | return;
|
643 | var r = _try(this, t, u);
|
644 | if (r === NO)
|
645 | return;
|
646 | u._n(r);
|
647 | };
|
648 | MapOp.prototype._e = function (err) {
|
649 | var u = this.out;
|
650 | if (u === NO)
|
651 | return;
|
652 | u._e(err);
|
653 | };
|
654 | MapOp.prototype._c = function () {
|
655 | var u = this.out;
|
656 | if (u === NO)
|
657 | return;
|
658 | u._c();
|
659 | };
|
660 | return MapOp;
|
661 | }());
|
662 | var Remember = /** @class */ (function () {
|
663 | function Remember(ins) {
|
664 | this.type = 'remember';
|
665 | this.ins = ins;
|
666 | this.out = NO;
|
667 | }
|
668 | Remember.prototype._start = function (out) {
|
669 | this.out = out;
|
670 | this.ins._add(out);
|
671 | };
|
672 | Remember.prototype._stop = function () {
|
673 | this.ins._remove(this.out);
|
674 | this.out = NO;
|
675 | };
|
676 | return Remember;
|
677 | }());
|
678 | var ReplaceError = /** @class */ (function () {
|
679 | function ReplaceError(replacer, ins) {
|
680 | this.type = 'replaceError';
|
681 | this.ins = ins;
|
682 | this.out = NO;
|
683 | this.f = replacer;
|
684 | }
|
685 | ReplaceError.prototype._start = function (out) {
|
686 | this.out = out;
|
687 | this.ins._add(this);
|
688 | };
|
689 | ReplaceError.prototype._stop = function () {
|
690 | this.ins._remove(this);
|
691 | this.out = NO;
|
692 | };
|
693 | ReplaceError.prototype._n = function (t) {
|
694 | var u = this.out;
|
695 | if (u === NO)
|
696 | return;
|
697 | u._n(t);
|
698 | };
|
699 | ReplaceError.prototype._e = function (err) {
|
700 | var u = this.out;
|
701 | if (u === NO)
|
702 | return;
|
703 | try {
|
704 | this.ins._remove(this);
|
705 | (this.ins = this.f(err))._add(this);
|
706 | }
|
707 | catch (e) {
|
708 | u._e(e);
|
709 | }
|
710 | };
|
711 | ReplaceError.prototype._c = function () {
|
712 | var u = this.out;
|
713 | if (u === NO)
|
714 | return;
|
715 | u._c();
|
716 | };
|
717 | return ReplaceError;
|
718 | }());
|
719 | var StartWith = /** @class */ (function () {
|
720 | function StartWith(ins, val) {
|
721 | this.type = 'startWith';
|
722 | this.ins = ins;
|
723 | this.out = NO;
|
724 | this.val = val;
|
725 | }
|
726 | StartWith.prototype._start = function (out) {
|
727 | this.out = out;
|
728 | this.out._n(this.val);
|
729 | this.ins._add(out);
|
730 | };
|
731 | StartWith.prototype._stop = function () {
|
732 | this.ins._remove(this.out);
|
733 | this.out = NO;
|
734 | };
|
735 | return StartWith;
|
736 | }());
|
737 | var Take = /** @class */ (function () {
|
738 | function Take(max, ins) {
|
739 | this.type = 'take';
|
740 | this.ins = ins;
|
741 | this.out = NO;
|
742 | this.max = max;
|
743 | this.taken = 0;
|
744 | }
|
745 | Take.prototype._start = function (out) {
|
746 | this.out = out;
|
747 | this.taken = 0;
|
748 | if (this.max <= 0)
|
749 | out._c();
|
750 | else
|
751 | this.ins._add(this);
|
752 | };
|
753 | Take.prototype._stop = function () {
|
754 | this.ins._remove(this);
|
755 | this.out = NO;
|
756 | };
|
757 | Take.prototype._n = function (t) {
|
758 | var u = this.out;
|
759 | if (u === NO)
|
760 | return;
|
761 | var m = ++this.taken;
|
762 | if (m < this.max)
|
763 | u._n(t);
|
764 | else if (m === this.max) {
|
765 | u._n(t);
|
766 | u._c();
|
767 | }
|
768 | };
|
769 | Take.prototype._e = function (err) {
|
770 | var u = this.out;
|
771 | if (u === NO)
|
772 | return;
|
773 | u._e(err);
|
774 | };
|
775 | Take.prototype._c = function () {
|
776 | var u = this.out;
|
777 | if (u === NO)
|
778 | return;
|
779 | u._c();
|
780 | };
|
781 | return Take;
|
782 | }());
|
783 | var Stream = /** @class */ (function () {
|
784 | function Stream(producer) {
|
785 | this._prod = producer || NO;
|
786 | this._ils = [];
|
787 | this._stopID = NO;
|
788 | this._dl = NO;
|
789 | this._d = false;
|
790 | this._target = null;
|
791 | this._err = NO;
|
792 | }
|
793 | Stream.prototype._n = function (t) {
|
794 | var a = this._ils;
|
795 | var L = a.length;
|
796 | if (this._d)
|
797 | this._dl._n(t);
|
798 | if (L == 1)
|
799 | a[0]._n(t);
|
800 | else if (L == 0)
|
801 | return;
|
802 | else {
|
803 | var b = cp(a);
|
804 | for (var i = 0; i < L; i++)
|
805 | b[i]._n(t);
|
806 | }
|
807 | };
|
808 | Stream.prototype._e = function (err) {
|
809 | if (this._err !== NO)
|
810 | return;
|
811 | this._err = err;
|
812 | var a = this._ils;
|
813 | var L = a.length;
|
814 | this._x();
|
815 | if (this._d)
|
816 | this._dl._e(err);
|
817 | if (L == 1)
|
818 | a[0]._e(err);
|
819 | else if (L == 0)
|
820 | return;
|
821 | else {
|
822 | var b = cp(a);
|
823 | for (var i = 0; i < L; i++)
|
824 | b[i]._e(err);
|
825 | }
|
826 | if (!this._d && L == 0)
|
827 | throw this._err;
|
828 | };
|
829 | Stream.prototype._c = function () {
|
830 | var a = this._ils;
|
831 | var L = a.length;
|
832 | this._x();
|
833 | if (this._d)
|
834 | this._dl._c();
|
835 | if (L == 1)
|
836 | a[0]._c();
|
837 | else if (L == 0)
|
838 | return;
|
839 | else {
|
840 | var b = cp(a);
|
841 | for (var i = 0; i < L; i++)
|
842 | b[i]._c();
|
843 | }
|
844 | };
|
845 | Stream.prototype._x = function () {
|
846 | if (this._ils.length === 0)
|
847 | return;
|
848 | if (this._prod !== NO)
|
849 | this._prod._stop();
|
850 | this._err = NO;
|
851 | this._ils = [];
|
852 | };
|
853 | Stream.prototype._stopNow = function () {
|
854 | // WARNING: code that calls this method should
|
855 | // first check if this._prod is valid (not `NO`)
|
856 | this._prod._stop();
|
857 | this._err = NO;
|
858 | this._stopID = NO;
|
859 | };
|
860 | Stream.prototype._add = function (il) {
|
861 | var ta = this._target;
|
862 | if (ta)
|
863 | return ta._add(il);
|
864 | var a = this._ils;
|
865 | a.push(il);
|
866 | if (a.length > 1)
|
867 | return;
|
868 | if (this._stopID !== NO) {
|
869 | clearTimeout(this._stopID);
|
870 | this._stopID = NO;
|
871 | }
|
872 | else {
|
873 | var p = this._prod;
|
874 | if (p !== NO)
|
875 | p._start(this);
|
876 | }
|
877 | };
|
878 | Stream.prototype._remove = function (il) {
|
879 | var _this = this;
|
880 | var ta = this._target;
|
881 | if (ta)
|
882 | return ta._remove(il);
|
883 | var a = this._ils;
|
884 | var i = a.indexOf(il);
|
885 | if (i > -1) {
|
886 | a.splice(i, 1);
|
887 | if (this._prod !== NO && a.length <= 0) {
|
888 | this._err = NO;
|
889 | this._stopID = setTimeout(function () { return _this._stopNow(); });
|
890 | }
|
891 | else if (a.length === 1) {
|
892 | this._pruneCycles();
|
893 | }
|
894 | }
|
895 | };
|
896 | // If all paths stemming from `this` stream eventually end at `this`
|
897 | // stream, then we remove the single listener of `this` stream, to
|
898 | // force it to end its execution and dispose resources. This method
|
899 | // assumes as a precondition that this._ils has just one listener.
|
900 | Stream.prototype._pruneCycles = function () {
|
901 | if (this._hasNoSinks(this, []))
|
902 | this._remove(this._ils[0]);
|
903 | };
|
904 | // Checks whether *there is no* path starting from `x` that leads to an end
|
905 | // listener (sink) in the stream graph, following edges A->B where B is a
|
906 | // listener of A. This means these paths constitute a cycle somehow. Is given
|
907 | // a trace of all visited nodes so far.
|
908 | Stream.prototype._hasNoSinks = function (x, trace) {
|
909 | if (trace.indexOf(x) !== -1)
|
910 | return true;
|
911 | else if (x.out === this)
|
912 | return true;
|
913 | else if (x.out && x.out !== NO)
|
914 | return this._hasNoSinks(x.out, trace.concat(x));
|
915 | else if (x._ils) {
|
916 | for (var i = 0, N = x._ils.length; i < N; i++)
|
917 | if (!this._hasNoSinks(x._ils[i], trace.concat(x)))
|
918 | return false;
|
919 | return true;
|
920 | }
|
921 | else
|
922 | return false;
|
923 | };
|
924 | Stream.prototype.ctor = function () {
|
925 | return this instanceof MemoryStream ? MemoryStream : Stream;
|
926 | };
|
927 | /**
|
928 | * Adds a Listener to the Stream.
|
929 | *
|
930 | * @param {Listener} listener
|
931 | */
|
932 | Stream.prototype.addListener = function (listener) {
|
933 | listener._n = listener.next || noop;
|
934 | listener._e = listener.error || noop;
|
935 | listener._c = listener.complete || noop;
|
936 | this._add(listener);
|
937 | };
|
938 | /**
|
939 | * Removes a Listener from the Stream, assuming the Listener was added to it.
|
940 | *
|
941 | * @param {Listener<T>} listener
|
942 | */
|
943 | Stream.prototype.removeListener = function (listener) {
|
944 | this._remove(listener);
|
945 | };
|
946 | /**
|
947 | * Adds a Listener to the Stream returning a Subscription to remove that
|
948 | * listener.
|
949 | *
|
950 | * @param {Listener} listener
|
951 | * @returns {Subscription}
|
952 | */
|
953 | Stream.prototype.subscribe = function (listener) {
|
954 | this.addListener(listener);
|
955 | return new StreamSub(this, listener);
|
956 | };
|
957 | /**
|
958 | * Add interop between most.js and RxJS 5
|
959 | *
|
960 | * @returns {Stream}
|
961 | */
|
962 | Stream.prototype[$$observable] = function () {
|
963 | return this;
|
964 | };
|
965 | /**
|
966 | * Creates a new Stream given a Producer.
|
967 | *
|
968 | * @factory true
|
969 | * @param {Producer} producer An optional Producer that dictates how to
|
970 | * start, generate events, and stop the Stream.
|
971 | * @return {Stream}
|
972 | */
|
973 | Stream.create = function (producer) {
|
974 | if (producer) {
|
975 | if (typeof producer.start !== 'function'
|
976 | || typeof producer.stop !== 'function')
|
977 | throw new Error('producer requires both start and stop functions');
|
978 | internalizeProducer(producer); // mutates the input
|
979 | }
|
980 | return new Stream(producer);
|
981 | };
|
982 | /**
|
983 | * Creates a new MemoryStream given a Producer.
|
984 | *
|
985 | * @factory true
|
986 | * @param {Producer} producer An optional Producer that dictates how to
|
987 | * start, generate events, and stop the Stream.
|
988 | * @return {MemoryStream}
|
989 | */
|
990 | Stream.createWithMemory = function (producer) {
|
991 | if (producer)
|
992 | internalizeProducer(producer); // mutates the input
|
993 | return new MemoryStream(producer);
|
994 | };
|
995 | /**
|
996 | * Creates a Stream that does nothing when started. It never emits any event.
|
997 | *
|
998 | * Marble diagram:
|
999 | *
|
1000 | * ```text
|
1001 | * never
|
1002 | * -----------------------
|
1003 | * ```
|
1004 | *
|
1005 | * @factory true
|
1006 | * @return {Stream}
|
1007 | */
|
1008 | Stream.never = function () {
|
1009 | return new Stream({ _start: noop, _stop: noop });
|
1010 | };
|
1011 | /**
|
1012 | * Creates a Stream that immediately emits the "complete" notification when
|
1013 | * started, and that's it.
|
1014 | *
|
1015 | * Marble diagram:
|
1016 | *
|
1017 | * ```text
|
1018 | * empty
|
1019 | * -|
|
1020 | * ```
|
1021 | *
|
1022 | * @factory true
|
1023 | * @return {Stream}
|
1024 | */
|
1025 | Stream.empty = function () {
|
1026 | return new Stream({
|
1027 | _start: function (il) { il._c(); },
|
1028 | _stop: noop,
|
1029 | });
|
1030 | };
|
1031 | /**
|
1032 | * Creates a Stream that immediately emits an "error" notification with the
|
1033 | * value you passed as the `error` argument when the stream starts, and that's
|
1034 | * it.
|
1035 | *
|
1036 | * Marble diagram:
|
1037 | *
|
1038 | * ```text
|
1039 | * throw(X)
|
1040 | * -X
|
1041 | * ```
|
1042 | *
|
1043 | * @factory true
|
1044 | * @param error The error event to emit on the created stream.
|
1045 | * @return {Stream}
|
1046 | */
|
1047 | Stream.throw = function (error) {
|
1048 | return new Stream({
|
1049 | _start: function (il) { il._e(error); },
|
1050 | _stop: noop,
|
1051 | });
|
1052 | };
|
1053 | /**
|
1054 | * Creates a stream from an Array, Promise, or an Observable.
|
1055 | *
|
1056 | * @factory true
|
1057 | * @param {Array|PromiseLike|Observable} input The input to make a stream from.
|
1058 | * @return {Stream}
|
1059 | */
|
1060 | Stream.from = function (input) {
|
1061 | if (typeof input[$$observable] === 'function')
|
1062 | return Stream.fromObservable(input);
|
1063 | else if (typeof input.then === 'function')
|
1064 | return Stream.fromPromise(input);
|
1065 | else if (Array.isArray(input))
|
1066 | return Stream.fromArray(input);
|
1067 | throw new TypeError("Type of input to from() must be an Array, Promise, or Observable");
|
1068 | };
|
1069 | /**
|
1070 | * Creates a Stream that immediately emits the arguments that you give to
|
1071 | * *of*, then completes.
|
1072 | *
|
1073 | * Marble diagram:
|
1074 | *
|
1075 | * ```text
|
1076 | * of(1,2,3)
|
1077 | * 123|
|
1078 | * ```
|
1079 | *
|
1080 | * @factory true
|
1081 | * @param a The first value you want to emit as an event on the stream.
|
1082 | * @param b The second value you want to emit as an event on the stream. One
|
1083 | * or more of these values may be given as arguments.
|
1084 | * @return {Stream}
|
1085 | */
|
1086 | Stream.of = function () {
|
1087 | var items = [];
|
1088 | for (var _i = 0; _i < arguments.length; _i++) {
|
1089 | items[_i] = arguments[_i];
|
1090 | }
|
1091 | return Stream.fromArray(items);
|
1092 | };
|
1093 | /**
|
1094 | * Converts an array to a stream. The returned stream will emit synchronously
|
1095 | * all the items in the array, and then complete.
|
1096 | *
|
1097 | * Marble diagram:
|
1098 | *
|
1099 | * ```text
|
1100 | * fromArray([1,2,3])
|
1101 | * 123|
|
1102 | * ```
|
1103 | *
|
1104 | * @factory true
|
1105 | * @param {Array} array The array to be converted as a stream.
|
1106 | * @return {Stream}
|
1107 | */
|
1108 | Stream.fromArray = function (array) {
|
1109 | return new Stream(new FromArray(array));
|
1110 | };
|
1111 | /**
|
1112 | * Converts a promise to a stream. The returned stream will emit the resolved
|
1113 | * value of the promise, and then complete. However, if the promise is
|
1114 | * rejected, the stream will emit the corresponding error.
|
1115 | *
|
1116 | * Marble diagram:
|
1117 | *
|
1118 | * ```text
|
1119 | * fromPromise( ----42 )
|
1120 | * -----------------42|
|
1121 | * ```
|
1122 | *
|
1123 | * @factory true
|
1124 | * @param {PromiseLike} promise The promise to be converted as a stream.
|
1125 | * @return {Stream}
|
1126 | */
|
1127 | Stream.fromPromise = function (promise) {
|
1128 | return new Stream(new FromPromise(promise));
|
1129 | };
|
1130 | /**
|
1131 | * Converts an Observable into a Stream.
|
1132 | *
|
1133 | * @factory true
|
1134 | * @param {any} observable The observable to be converted as a stream.
|
1135 | * @return {Stream}
|
1136 | */
|
1137 | Stream.fromObservable = function (obs) {
|
1138 | if (obs.endWhen !== undefined)
|
1139 | return obs;
|
1140 | var o = typeof obs[$$observable] === 'function' ? obs[$$observable]() : obs;
|
1141 | return new Stream(new FromObservable(o));
|
1142 | };
|
1143 | /**
|
1144 | * Creates a stream that periodically emits incremental numbers, every
|
1145 | * `period` milliseconds.
|
1146 | *
|
1147 | * Marble diagram:
|
1148 | *
|
1149 | * ```text
|
1150 | * periodic(1000)
|
1151 | * ---0---1---2---3---4---...
|
1152 | * ```
|
1153 | *
|
1154 | * @factory true
|
1155 | * @param {number} period The interval in milliseconds to use as a rate of
|
1156 | * emission.
|
1157 | * @return {Stream}
|
1158 | */
|
1159 | Stream.periodic = function (period) {
|
1160 | return new Stream(new Periodic(period));
|
1161 | };
|
1162 | Stream.prototype._map = function (project) {
|
1163 | return new (this.ctor())(new MapOp(project, this));
|
1164 | };
|
1165 | /**
|
1166 | * Transforms each event from the input Stream through a `project` function,
|
1167 | * to get a Stream that emits those transformed events.
|
1168 | *
|
1169 | * Marble diagram:
|
1170 | *
|
1171 | * ```text
|
1172 | * --1---3--5-----7------
|
1173 | * map(i => i * 10)
|
1174 | * --10--30-50----70-----
|
1175 | * ```
|
1176 | *
|
1177 | * @param {Function} project A function of type `(t: T) => U` that takes event
|
1178 | * `t` of type `T` from the input Stream and produces an event of type `U`, to
|
1179 | * be emitted on the output Stream.
|
1180 | * @return {Stream}
|
1181 | */
|
1182 | Stream.prototype.map = function (project) {
|
1183 | return this._map(project);
|
1184 | };
|
1185 | /**
|
1186 | * It's like `map`, but transforms each input event to always the same
|
1187 | * constant value on the output Stream.
|
1188 | *
|
1189 | * Marble diagram:
|
1190 | *
|
1191 | * ```text
|
1192 | * --1---3--5-----7-----
|
1193 | * mapTo(10)
|
1194 | * --10--10-10----10----
|
1195 | * ```
|
1196 | *
|
1197 | * @param projectedValue A value to emit on the output Stream whenever the
|
1198 | * input Stream emits any value.
|
1199 | * @return {Stream}
|
1200 | */
|
1201 | Stream.prototype.mapTo = function (projectedValue) {
|
1202 | var s = this.map(function () { return projectedValue; });
|
1203 | var op = s._prod;
|
1204 | op.type = 'mapTo';
|
1205 | return s;
|
1206 | };
|
1207 | /**
|
1208 | * Only allows events that pass the test given by the `passes` argument.
|
1209 | *
|
1210 | * Each event from the input stream is given to the `passes` function. If the
|
1211 | * function returns `true`, the event is forwarded to the output stream,
|
1212 | * otherwise it is ignored and not forwarded.
|
1213 | *
|
1214 | * Marble diagram:
|
1215 | *
|
1216 | * ```text
|
1217 | * --1---2--3-----4-----5---6--7-8--
|
1218 | * filter(i => i % 2 === 0)
|
1219 | * ------2--------4---------6----8--
|
1220 | * ```
|
1221 | *
|
1222 | * @param {Function} passes A function of type `(t: T) => boolean` that takes
|
1223 | * an event from the input stream and checks if it passes, by returning a
|
1224 | * boolean.
|
1225 | * @return {Stream}
|
1226 | */
|
1227 | Stream.prototype.filter = function (passes) {
|
1228 | var p = this._prod;
|
1229 | if (p instanceof Filter)
|
1230 | return new Stream(new Filter(and(p.f, passes), p.ins));
|
1231 | return new Stream(new Filter(passes, this));
|
1232 | };
|
1233 | /**
|
1234 | * Lets the first `amount` many events from the input stream pass to the
|
1235 | * output stream, then makes the output stream complete.
|
1236 | *
|
1237 | * Marble diagram:
|
1238 | *
|
1239 | * ```text
|
1240 | * --a---b--c----d---e--
|
1241 | * take(3)
|
1242 | * --a---b--c|
|
1243 | * ```
|
1244 | *
|
1245 | * @param {number} amount How many events to allow from the input stream
|
1246 | * before completing the output stream.
|
1247 | * @return {Stream}
|
1248 | */
|
1249 | Stream.prototype.take = function (amount) {
|
1250 | return new (this.ctor())(new Take(amount, this));
|
1251 | };
|
1252 | /**
|
1253 | * Ignores the first `amount` many events from the input stream, and then
|
1254 | * after that starts forwarding events from the input stream to the output
|
1255 | * stream.
|
1256 | *
|
1257 | * Marble diagram:
|
1258 | *
|
1259 | * ```text
|
1260 | * --a---b--c----d---e--
|
1261 | * drop(3)
|
1262 | * --------------d---e--
|
1263 | * ```
|
1264 | *
|
1265 | * @param {number} amount How many events to ignore from the input stream
|
1266 | * before forwarding all events from the input stream to the output stream.
|
1267 | * @return {Stream}
|
1268 | */
|
1269 | Stream.prototype.drop = function (amount) {
|
1270 | return new Stream(new Drop(amount, this));
|
1271 | };
|
1272 | /**
|
1273 | * When the input stream completes, the output stream will emit the last event
|
1274 | * emitted by the input stream, and then will also complete.
|
1275 | *
|
1276 | * Marble diagram:
|
1277 | *
|
1278 | * ```text
|
1279 | * --a---b--c--d----|
|
1280 | * last()
|
1281 | * -----------------d|
|
1282 | * ```
|
1283 | *
|
1284 | * @return {Stream}
|
1285 | */
|
1286 | Stream.prototype.last = function () {
|
1287 | return new Stream(new Last(this));
|
1288 | };
|
1289 | /**
|
1290 | * Prepends the given `initial` value to the sequence of events emitted by the
|
1291 | * input stream. The returned stream is a MemoryStream, which means it is
|
1292 | * already `remember()`'d.
|
1293 | *
|
1294 | * Marble diagram:
|
1295 | *
|
1296 | * ```text
|
1297 | * ---1---2-----3---
|
1298 | * startWith(0)
|
1299 | * 0--1---2-----3---
|
1300 | * ```
|
1301 | *
|
1302 | * @param initial The value or event to prepend.
|
1303 | * @return {MemoryStream}
|
1304 | */
|
1305 | Stream.prototype.startWith = function (initial) {
|
1306 | return new MemoryStream(new StartWith(this, initial));
|
1307 | };
|
1308 | /**
|
1309 | * Uses another stream to determine when to complete the current stream.
|
1310 | *
|
1311 | * When the given `other` stream emits an event or completes, the output
|
1312 | * stream will complete. Before that happens, the output stream will behaves
|
1313 | * like the input stream.
|
1314 | *
|
1315 | * Marble diagram:
|
1316 | *
|
1317 | * ```text
|
1318 | * ---1---2-----3--4----5----6---
|
1319 | * endWhen( --------a--b--| )
|
1320 | * ---1---2-----3--4--|
|
1321 | * ```
|
1322 | *
|
1323 | * @param other Some other stream that is used to know when should the output
|
1324 | * stream of this operator complete.
|
1325 | * @return {Stream}
|
1326 | */
|
1327 | Stream.prototype.endWhen = function (other) {
|
1328 | return new (this.ctor())(new EndWhen(other, this));
|
1329 | };
|
1330 | /**
|
1331 | * "Folds" the stream onto itself.
|
1332 | *
|
1333 | * Combines events from the past throughout
|
1334 | * the entire execution of the input stream, allowing you to accumulate them
|
1335 | * together. It's essentially like `Array.prototype.reduce`. The returned
|
1336 | * stream is a MemoryStream, which means it is already `remember()`'d.
|
1337 | *
|
1338 | * The output stream starts by emitting the `seed` which you give as argument.
|
1339 | * Then, when an event happens on the input stream, it is combined with that
|
1340 | * seed value through the `accumulate` function, and the output value is
|
1341 | * emitted on the output stream. `fold` remembers that output value as `acc`
|
1342 | * ("accumulator"), and then when a new input event `t` happens, `acc` will be
|
1343 | * combined with that to produce the new `acc` and so forth.
|
1344 | *
|
1345 | * Marble diagram:
|
1346 | *
|
1347 | * ```text
|
1348 | * ------1-----1--2----1----1------
|
1349 | * fold((acc, x) => acc + x, 3)
|
1350 | * 3-----4-----5--7----8----9------
|
1351 | * ```
|
1352 | *
|
1353 | * @param {Function} accumulate A function of type `(acc: R, t: T) => R` that
|
1354 | * takes the previous accumulated value `acc` and the incoming event from the
|
1355 | * input stream and produces the new accumulated value.
|
1356 | * @param seed The initial accumulated value, of type `R`.
|
1357 | * @return {MemoryStream}
|
1358 | */
|
1359 | Stream.prototype.fold = function (accumulate, seed) {
|
1360 | return new MemoryStream(new Fold(accumulate, seed, this));
|
1361 | };
|
1362 | /**
|
1363 | * Replaces an error with another stream.
|
1364 | *
|
1365 | * When (and if) an error happens on the input stream, instead of forwarding
|
1366 | * that error to the output stream, *replaceError* will call the `replace`
|
1367 | * function which returns the stream that the output stream will replicate.
|
1368 | * And, in case that new stream also emits an error, `replace` will be called
|
1369 | * again to get another stream to start replicating.
|
1370 | *
|
1371 | * Marble diagram:
|
1372 | *
|
1373 | * ```text
|
1374 | * --1---2-----3--4-----X
|
1375 | * replaceError( () => --10--| )
|
1376 | * --1---2-----3--4--------10--|
|
1377 | * ```
|
1378 | *
|
1379 | * @param {Function} replace A function of type `(err) => Stream` that takes
|
1380 | * the error that occurred on the input stream or on the previous replacement
|
1381 | * stream and returns a new stream. The output stream will behave like the
|
1382 | * stream that this function returns.
|
1383 | * @return {Stream}
|
1384 | */
|
1385 | Stream.prototype.replaceError = function (replace) {
|
1386 | return new (this.ctor())(new ReplaceError(replace, this));
|
1387 | };
|
1388 | /**
|
1389 | * Flattens a "stream of streams", handling only one nested stream at a time
|
1390 | * (no concurrency).
|
1391 | *
|
1392 | * If the input stream is a stream that emits streams, then this operator will
|
1393 | * return an output stream which is a flat stream: emits regular events. The
|
1394 | * flattening happens without concurrency. It works like this: when the input
|
1395 | * stream emits a nested stream, *flatten* will start imitating that nested
|
1396 | * one. However, as soon as the next nested stream is emitted on the input
|
1397 | * stream, *flatten* will forget the previous nested one it was imitating, and
|
1398 | * will start imitating the new nested one.
|
1399 | *
|
1400 | * Marble diagram:
|
1401 | *
|
1402 | * ```text
|
1403 | * --+--------+---------------
|
1404 | * \ \
|
1405 | * \ ----1----2---3--
|
1406 | * --a--b----c----d--------
|
1407 | * flatten
|
1408 | * -----a--b------1----2---3--
|
1409 | * ```
|
1410 | *
|
1411 | * @return {Stream}
|
1412 | */
|
1413 | Stream.prototype.flatten = function () {
|
1414 | return new Stream(new Flatten(this));
|
1415 | };
|
1416 | /**
|
1417 | * Passes the input stream to a custom operator, to produce an output stream.
|
1418 | *
|
1419 | * *compose* is a handy way of using an existing function in a chained style.
|
1420 | * Instead of writing `outStream = f(inStream)` you can write
|
1421 | * `outStream = inStream.compose(f)`.
|
1422 | *
|
1423 | * @param {function} operator A function that takes a stream as input and
|
1424 | * returns a stream as well.
|
1425 | * @return {Stream}
|
1426 | */
|
1427 | Stream.prototype.compose = function (operator) {
|
1428 | return operator(this);
|
1429 | };
|
1430 | /**
|
1431 | * Returns an output stream that behaves like the input stream, but also
|
1432 | * remembers the most recent event that happens on the input stream, so that a
|
1433 | * newly added listener will immediately receive that memorised event.
|
1434 | *
|
1435 | * @return {MemoryStream}
|
1436 | */
|
1437 | Stream.prototype.remember = function () {
|
1438 | return new MemoryStream(new Remember(this));
|
1439 | };
|
1440 | /**
|
1441 | * Returns an output stream that identically behaves like the input stream,
|
1442 | * but also runs a `spy` function for each event, to help you debug your app.
|
1443 | *
|
1444 | * *debug* takes a `spy` function as argument, and runs that for each event
|
1445 | * happening on the input stream. If you don't provide the `spy` argument,
|
1446 | * then *debug* will just `console.log` each event. This helps you to
|
1447 | * understand the flow of events through some operator chain.
|
1448 | *
|
1449 | * Please note that if the output stream has no listeners, then it will not
|
1450 | * start, which means `spy` will never run because no actual event happens in
|
1451 | * that case.
|
1452 | *
|
1453 | * Marble diagram:
|
1454 | *
|
1455 | * ```text
|
1456 | * --1----2-----3-----4--
|
1457 | * debug
|
1458 | * --1----2-----3-----4--
|
1459 | * ```
|
1460 | *
|
1461 | * @param {function} labelOrSpy A string to use as the label when printing
|
1462 | * debug information on the console, or a 'spy' function that takes an event
|
1463 | * as argument, and does not need to return anything.
|
1464 | * @return {Stream}
|
1465 | */
|
1466 | Stream.prototype.debug = function (labelOrSpy) {
|
1467 | return new (this.ctor())(new Debug(this, labelOrSpy));
|
1468 | };
|
1469 | /**
|
1470 | * *imitate* changes this current Stream to emit the same events that the
|
1471 | * `other` given Stream does. This method returns nothing.
|
1472 | *
|
1473 | * This method exists to allow one thing: **circular dependency of streams**.
|
1474 | * For instance, let's imagine that for some reason you need to create a
|
1475 | * circular dependency where stream `first$` depends on stream `second$`
|
1476 | * which in turn depends on `first$`:
|
1477 | *
|
1478 | * <!-- skip-example -->
|
1479 | * ```js
|
1480 | * import delay from 'xstream/extra/delay'
|
1481 | *
|
1482 | * var first$ = second$.map(x => x * 10).take(3);
|
1483 | * var second$ = first$.map(x => x + 1).startWith(1).compose(delay(100));
|
1484 | * ```
|
1485 | *
|
1486 | * However, that is invalid JavaScript, because `second$` is undefined
|
1487 | * on the first line. This is how *imitate* can help solve it:
|
1488 | *
|
1489 | * ```js
|
1490 | * import delay from 'xstream/extra/delay'
|
1491 | *
|
1492 | * var secondProxy$ = xs.create();
|
1493 | * var first$ = secondProxy$.map(x => x * 10).take(3);
|
1494 | * var second$ = first$.map(x => x + 1).startWith(1).compose(delay(100));
|
1495 | * secondProxy$.imitate(second$);
|
1496 | * ```
|
1497 | *
|
1498 | * We create `secondProxy$` before the others, so it can be used in the
|
1499 | * declaration of `first$`. Then, after both `first$` and `second$` are
|
1500 | * defined, we hook `secondProxy$` with `second$` with `imitate()` to tell
|
1501 | * that they are "the same". `imitate` will not trigger the start of any
|
1502 | * stream, it just binds `secondProxy$` and `second$` together.
|
1503 | *
|
1504 | * The following is an example where `imitate()` is important in Cycle.js
|
1505 | * applications. A parent component contains some child components. A child
|
1506 | * has an action stream which is given to the parent to define its state:
|
1507 | *
|
1508 | * <!-- skip-example -->
|
1509 | * ```js
|
1510 | * const childActionProxy$ = xs.create();
|
1511 | * const parent = Parent({...sources, childAction$: childActionProxy$});
|
1512 | * const childAction$ = parent.state$.map(s => s.child.action$).flatten();
|
1513 | * childActionProxy$.imitate(childAction$);
|
1514 | * ```
|
1515 | *
|
1516 | * Note, though, that **`imitate()` does not support MemoryStreams**. If we
|
1517 | * would attempt to imitate a MemoryStream in a circular dependency, we would
|
1518 | * either get a race condition (where the symptom would be "nothing happens")
|
1519 | * or an infinite cyclic emission of values. It's useful to think about
|
1520 | * MemoryStreams as cells in a spreadsheet. It doesn't make any sense to
|
1521 | * define a spreadsheet cell `A1` with a formula that depends on `B1` and
|
1522 | * cell `B1` defined with a formula that depends on `A1`.
|
1523 | *
|
1524 | * If you find yourself wanting to use `imitate()` with a
|
1525 | * MemoryStream, you should rework your code around `imitate()` to use a
|
1526 | * Stream instead. Look for the stream in the circular dependency that
|
1527 | * represents an event stream, and that would be a candidate for creating a
|
1528 | * proxy Stream which then imitates the target Stream.
|
1529 | *
|
1530 | * @param {Stream} target The other stream to imitate on the current one. Must
|
1531 | * not be a MemoryStream.
|
1532 | */
|
1533 | Stream.prototype.imitate = function (target) {
|
1534 | if (target instanceof MemoryStream)
|
1535 | throw new Error('A MemoryStream was given to imitate(), but it only ' +
|
1536 | 'supports a Stream. Read more about this restriction here: ' +
|
1537 | 'https://github.com/staltz/xstream#faq');
|
1538 | this._target = target;
|
1539 | for (var ils = this._ils, N = ils.length, i = 0; i < N; i++)
|
1540 | target._add(ils[i]);
|
1541 | this._ils = [];
|
1542 | };
|
1543 | /**
|
1544 | * Forces the Stream to emit the given value to its listeners.
|
1545 | *
|
1546 | * As the name indicates, if you use this, you are most likely doing something
|
1547 | * The Wrong Way. Please try to understand the reactive way before using this
|
1548 | * method. Use it only when you know what you are doing.
|
1549 | *
|
1550 | * @param value The "next" value you want to broadcast to all listeners of
|
1551 | * this Stream.
|
1552 | */
|
1553 | Stream.prototype.shamefullySendNext = function (value) {
|
1554 | this._n(value);
|
1555 | };
|
1556 | /**
|
1557 | * Forces the Stream to emit the given error to its listeners.
|
1558 | *
|
1559 | * As the name indicates, if you use this, you are most likely doing something
|
1560 | * The Wrong Way. Please try to understand the reactive way before using this
|
1561 | * method. Use it only when you know what you are doing.
|
1562 | *
|
1563 | * @param {any} error The error you want to broadcast to all the listeners of
|
1564 | * this Stream.
|
1565 | */
|
1566 | Stream.prototype.shamefullySendError = function (error) {
|
1567 | this._e(error);
|
1568 | };
|
1569 | /**
|
1570 | * Forces the Stream to emit the "completed" event to its listeners.
|
1571 | *
|
1572 | * As the name indicates, if you use this, you are most likely doing something
|
1573 | * The Wrong Way. Please try to understand the reactive way before using this
|
1574 | * method. Use it only when you know what you are doing.
|
1575 | */
|
1576 | Stream.prototype.shamefullySendComplete = function () {
|
1577 | this._c();
|
1578 | };
|
1579 | /**
|
1580 | * Adds a "debug" listener to the stream. There can only be one debug
|
1581 | * listener, that's why this is 'setDebugListener'. To remove the debug
|
1582 | * listener, just call setDebugListener(null).
|
1583 | *
|
1584 | * A debug listener is like any other listener. The only difference is that a
|
1585 | * debug listener is "stealthy": its presence/absence does not trigger the
|
1586 | * start/stop of the stream (or the producer inside the stream). This is
|
1587 | * useful so you can inspect what is going on without changing the behavior
|
1588 | * of the program. If you have an idle stream and you add a normal listener to
|
1589 | * it, the stream will start executing. But if you set a debug listener on an
|
1590 | * idle stream, it won't start executing (not until the first normal listener
|
1591 | * is added).
|
1592 | *
|
1593 | * As the name indicates, we don't recommend using this method to build app
|
1594 | * logic. In fact, in most cases the debug operator works just fine. Only use
|
1595 | * this one if you know what you're doing.
|
1596 | *
|
1597 | * @param {Listener<T>} listener
|
1598 | */
|
1599 | Stream.prototype.setDebugListener = function (listener) {
|
1600 | if (!listener) {
|
1601 | this._d = false;
|
1602 | this._dl = NO;
|
1603 | }
|
1604 | else {
|
1605 | this._d = true;
|
1606 | listener._n = listener.next || noop;
|
1607 | listener._e = listener.error || noop;
|
1608 | listener._c = listener.complete || noop;
|
1609 | this._dl = listener;
|
1610 | }
|
1611 | };
|
1612 | /**
|
1613 | * Blends multiple streams together, emitting events from all of them
|
1614 | * concurrently.
|
1615 | *
|
1616 | * *merge* takes multiple streams as arguments, and creates a stream that
|
1617 | * behaves like each of the argument streams, in parallel.
|
1618 | *
|
1619 | * Marble diagram:
|
1620 | *
|
1621 | * ```text
|
1622 | * --1----2-----3--------4---
|
1623 | * ----a-----b----c---d------
|
1624 | * merge
|
1625 | * --1-a--2--b--3-c---d--4---
|
1626 | * ```
|
1627 | *
|
1628 | * @factory true
|
1629 | * @param {Stream} stream1 A stream to merge together with other streams.
|
1630 | * @param {Stream} stream2 A stream to merge together with other streams. Two
|
1631 | * or more streams may be given as arguments.
|
1632 | * @return {Stream}
|
1633 | */
|
1634 | Stream.merge = function merge() {
|
1635 | var streams = [];
|
1636 | for (var _i = 0; _i < arguments.length; _i++) {
|
1637 | streams[_i] = arguments[_i];
|
1638 | }
|
1639 | return new Stream(new Merge(streams));
|
1640 | };
|
1641 | /**
|
1642 | * Combines multiple input streams together to return a stream whose events
|
1643 | * are arrays that collect the latest events from each input stream.
|
1644 | *
|
1645 | * *combine* internally remembers the most recent event from each of the input
|
1646 | * streams. When any of the input streams emits an event, that event together
|
1647 | * with all the other saved events are combined into an array. That array will
|
1648 | * be emitted on the output stream. It's essentially a way of joining together
|
1649 | * the events from multiple streams.
|
1650 | *
|
1651 | * Marble diagram:
|
1652 | *
|
1653 | * ```text
|
1654 | * --1----2-----3--------4---
|
1655 | * ----a-----b-----c--d------
|
1656 | * combine
|
1657 | * ----1a-2a-2b-3b-3c-3d-4d--
|
1658 | * ```
|
1659 | *
|
1660 | * @factory true
|
1661 | * @param {Stream} stream1 A stream to combine together with other streams.
|
1662 | * @param {Stream} stream2 A stream to combine together with other streams.
|
1663 | * Multiple streams, not just two, may be given as arguments.
|
1664 | * @return {Stream}
|
1665 | */
|
1666 | Stream.combine = function combine() {
|
1667 | var streams = [];
|
1668 | for (var _i = 0; _i < arguments.length; _i++) {
|
1669 | streams[_i] = arguments[_i];
|
1670 | }
|
1671 | return new Stream(new Combine(streams));
|
1672 | };
|
1673 | return Stream;
|
1674 | }());
|
1675 | exports.Stream = Stream;
|
1676 | var MemoryStream = /** @class */ (function (_super) {
|
1677 | __extends(MemoryStream, _super);
|
1678 | function MemoryStream(producer) {
|
1679 | var _this = _super.call(this, producer) || this;
|
1680 | _this._has = false;
|
1681 | return _this;
|
1682 | }
|
1683 | MemoryStream.prototype._n = function (x) {
|
1684 | this._v = x;
|
1685 | this._has = true;
|
1686 | _super.prototype._n.call(this, x);
|
1687 | };
|
1688 | MemoryStream.prototype._add = function (il) {
|
1689 | var ta = this._target;
|
1690 | if (ta)
|
1691 | return ta._add(il);
|
1692 | var a = this._ils;
|
1693 | a.push(il);
|
1694 | if (a.length > 1) {
|
1695 | if (this._has)
|
1696 | il._n(this._v);
|
1697 | return;
|
1698 | }
|
1699 | if (this._stopID !== NO) {
|
1700 | if (this._has)
|
1701 | il._n(this._v);
|
1702 | clearTimeout(this._stopID);
|
1703 | this._stopID = NO;
|
1704 | }
|
1705 | else if (this._has)
|
1706 | il._n(this._v);
|
1707 | else {
|
1708 | var p = this._prod;
|
1709 | if (p !== NO)
|
1710 | p._start(this);
|
1711 | }
|
1712 | };
|
1713 | MemoryStream.prototype._stopNow = function () {
|
1714 | this._has = false;
|
1715 | _super.prototype._stopNow.call(this);
|
1716 | };
|
1717 | MemoryStream.prototype._x = function () {
|
1718 | this._has = false;
|
1719 | _super.prototype._x.call(this);
|
1720 | };
|
1721 | MemoryStream.prototype.map = function (project) {
|
1722 | return this._map(project);
|
1723 | };
|
1724 | MemoryStream.prototype.mapTo = function (projectedValue) {
|
1725 | return _super.prototype.mapTo.call(this, projectedValue);
|
1726 | };
|
1727 | MemoryStream.prototype.take = function (amount) {
|
1728 | return _super.prototype.take.call(this, amount);
|
1729 | };
|
1730 | MemoryStream.prototype.endWhen = function (other) {
|
1731 | return _super.prototype.endWhen.call(this, other);
|
1732 | };
|
1733 | MemoryStream.prototype.replaceError = function (replace) {
|
1734 | return _super.prototype.replaceError.call(this, replace);
|
1735 | };
|
1736 | MemoryStream.prototype.remember = function () {
|
1737 | return this;
|
1738 | };
|
1739 | MemoryStream.prototype.debug = function (labelOrSpy) {
|
1740 | return _super.prototype.debug.call(this, labelOrSpy);
|
1741 | };
|
1742 | return MemoryStream;
|
1743 | }(Stream));
|
1744 | exports.MemoryStream = MemoryStream;
|
1745 | var xs = Stream;
|
1746 | exports.default = xs;
|
1747 | //# 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InternalListener<T> & Partial<Listener<T>>) {\n    il.next = il._n;\n    il.error = il._e;\n    il.complete = il._c;\n    this.start(il as Listener<T>);\n  };\n  producer._stop = producer.stop;\n}\n\nclass StreamSub<T> implements Subscription {\n  constructor(private _stream: Stream<T>, private _listener: InternalListener<T>) { }\n\n  unsubscribe(): void {\n    this._stream._remove(this._listener);\n  }\n}\n\nclass Observer<T> implements Listener<T> {\n  constructor(private _listener: InternalListener<T>) { }\n\n  next(value: T) {\n    this._listener._n(value);\n  }\n\n  error(err: any) {\n    this._listener._e(err);\n  }\n\n  complete() {\n    this._listener._c();\n  }\n}\n\nclass FromObservable<T> implements InternalProducer<T> {\n  public type = 'fromObservable';\n  public ins: Observable<T>;\n  public out?: Stream<T>;\n  private active: boolean;\n  private _sub: Subscription | undefined;\n\n  constructor(observable: Observable<T>) {\n    this.ins = observable;\n    this.active = false;\n  }\n\n  _start(out: Stream<T>) {\n    this.out = out;\n    this.active = true;\n    this._sub = this.ins.subscribe(new Observer(out));\n    if (!this.active) this._sub.unsubscribe();\n  }\n\n  _stop() {\n    if (this._sub) this._sub.unsubscribe();\n    this.active = false;\n  }\n}\n\nexport interface MergeSignature {\n  (): Stream<any>;\n  <T1>(s1: Stream<T1>): Stream<T1>;\n  <T1, T2>(\n    s1: Stream<T1>,\n    s2: Stream<T2>): Stream<T1 | T2>;\n  <T1, T2, T3>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>): Stream<T1 | T2 | T3>;\n  <T1, T2, T3, T4>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>,\n    s4: Stream<T4>): Stream<T1 | T2 | T3 | T4>;\n  <T1, T2, T3, T4, T5>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>,\n    s4: Stream<T4>,\n    s5: Stream<T5>): Stream<T1 | T2 | T3 | T4 | T5>;\n  <T1, T2, T3, T4, T5, T6>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>,\n    s4: Stream<T4>,\n    s5: Stream<T5>,\n    s6: Stream<T6>): Stream<T1 | T2 | T3 | T4 | T5 | T6>;\n  <T1, T2, T3, T4, T5, T6, T7>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>,\n    s4: Stream<T4>,\n    s5: Stream<T5>,\n    s6: Stream<T6>,\n    s7: Stream<T7>): Stream<T1 | T2 | T3 | T4 | T5 | T6 | T7>;\n  <T1, T2, T3, T4, T5, T6, T7, T8>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>,\n    s4: Stream<T4>,\n    s5: Stream<T5>,\n    s6: Stream<T6>,\n    s7: Stream<T7>,\n    s8: Stream<T8>): Stream<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8>;\n  <T1, T2, T3, T4, T5, T6, T7, T8, T9>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>,\n    s4: Stream<T4>,\n    s5: Stream<T5>,\n    s6: Stream<T6>,\n    s7: Stream<T7>,\n    s8: Stream<T8>,\n    s9: Stream<T9>): Stream<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8 | T9>;\n  <T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>,\n    s4: Stream<T4>,\n    s5: Stream<T5>,\n    s6: Stream<T6>,\n    s7: Stream<T7>,\n    s8: Stream<T8>,\n    s9: Stream<T9>,\n    s10: Stream<T10>): Stream<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8 | T9 | T10>;\n  <T>(...stream: Array<Stream<T>>): Stream<T>;\n}\n\nclass Merge<T> implements Aggregator<T, T>, InternalListener<T> {\n  public type = 'merge';\n  public insArr: Array<Stream<T>>;\n  public out: Stream<T>;\n  private ac: number; // ac is activeCount\n\n  constructor(insArr: Array<Stream<T>>) {\n    this.insArr = insArr;\n    this.out = NO as Stream<T>;\n    this.ac = 0;\n  }\n\n  _start(out: Stream<T>): void {\n    this.out = out;\n    const s = this.insArr;\n    const L = s.length;\n    this.ac = L;\n    for (let i = 0; i < L; i++) s[i]._add(this);\n  }\n\n  _stop(): void {\n    const s = this.insArr;\n    const L = s.length;\n    for (let i = 0; i < L; i++) s[i]._remove(this);\n    this.out = NO as Stream<T>;\n  }\n\n  _n(t: T) {\n    const u = this.out;\n    if (u === NO) return;\n    u._n(t);\n  }\n\n  _e(err: any) {\n    const u = this.out;\n    if (u === NO) return;\n    u._e(err);\n  }\n\n  _c() {\n    if (--this.ac <= 0) {\n      const u = this.out;\n      if (u === NO) return;\n      u._c();\n    }\n  }\n}\n\nexport interface CombineSignature {\n  (): Stream<Array<any>>;\n  <T1>(s1: Stream<T1>): Stream<[T1]>;\n  <T1, T2>(\n    s1: Stream<T1>,\n    s2: Stream<T2>): Stream<[T1, T2]>;\n  <T1, T2, T3>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>): Stream<[T1, T2, T3]>;\n  <T1, T2, T3, T4>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>,\n    s4: Stream<T4>): Stream<[T1, T2, T3, T4]>;\n  <T1, T2, T3, T4, T5>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>,\n    s4: Stream<T4>,\n    s5: Stream<T5>): Stream<[T1, T2, T3, T4, T5]>;\n  <T1, T2, T3, T4, T5, T6>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>,\n    s4: Stream<T4>,\n    s5: Stream<T5>,\n    s6: Stream<T6>): Stream<[T1, T2, T3, T4, T5, T6]>;\n  <T1, T2, T3, T4, T5, T6, T7>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>,\n    s4: Stream<T4>,\n    s5: Stream<T5>,\n    s6: Stream<T6>,\n    s7: Stream<T7>): Stream<[T1, T2, T3, T4, T5, T6, T7]>;\n  <T1, T2, T3, T4, T5, T6, T7, T8>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>,\n    s4: Stream<T4>,\n    s5: Stream<T5>,\n    s6: Stream<T6>,\n    s7: Stream<T7>,\n    s8: Stream<T8>): Stream<[T1, T2, T3, T4, T5, T6, T7, T8]>;\n  <T1, T2, T3, T4, T5, T6, T7, T8, T9>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>,\n    s4: Stream<T4>,\n    s5: Stream<T5>,\n    s6: Stream<T6>,\n    s7: Stream<T7>,\n    s8: Stream<T8>,\n    s9: Stream<T9>): Stream<[T1, T2, T3, T4, T5, T6, T7, T8, T9]>;\n  <T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(\n    s1: Stream<T1>,\n    s2: Stream<T2>,\n    s3: Stream<T3>,\n    s4: Stream<T4>,\n    s5: Stream<T5>,\n    s6: Stream<T6>,\n    s7: Stream<T7>,\n    s8: Stream<T8>,\n    s9: Stream<T9>,\n    s10: Stream<T10>): Stream<[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10]>;\n  <T>(...stream: Array<Stream<T>>): Stream<Array<T>>;\n  (...stream: Array<Stream<any>>): Stream<Array<any>>;\n}\n\nclass CombineListener<T> implements InternalListener<T>, OutSender<Array<T>> {\n  private i: number;\n  public out: Stream<Array<T>>;\n  private p: Combine<T>;\n\n  constructor(i: number, out: Stream<Array<T>>, p: Combine<T>) {\n    this.i = i;\n    this.out = out;\n    this.p = p;\n    p.ils.push(this);\n  }\n\n  _n(t: T): void {\n    const p = this.p, out = this.out;\n    if (out === NO) return;\n    if (p.up(t, this.i)) {\n      const b = cp(p.vals);\n      out._n(b);\n    }\n  }\n\n  _e(err: any): void {\n    const out = this.out;\n    if (out === NO) return;\n    out._e(err);\n  }\n\n  _c(): void {\n    const p = this.p;\n    if (p.out === NO) return;\n    if (--p.Nc === 0) p.out._c();\n  }\n}\n\nclass Combine<R> implements Aggregator<any, Array<R>> {\n  public type = 'combine';\n  public insArr: Array<Stream<any>>;\n  public out: Stream<Array<R>>;\n  public ils: Array<CombineListener<any>>;\n  public Nc: number; // *N*umber of streams still to send *c*omplete\n  public Nn: number; // *N*umber of streams still to send *n*ext\n  public vals: Array<R>;\n\n  constructor(insArr: Array<Stream<any>>) {\n    this.insArr = insArr;\n    this.out = NO as Stream<Array<R>>;\n    this.ils = [];\n    this.Nc = this.Nn = 0;\n    this.vals = [];\n  }\n\n  up(t: any, i: number): boolean {\n    const v = this.vals[i];\n    const Nn = !this.Nn ? 0 : v === NO ? --this.Nn : this.Nn;\n    this.vals[i] = t;\n    return Nn === 0;\n  }\n\n  _start(out: Stream<Array<R>>): void {\n    this.out = out;\n    const s = this.insArr;\n    const n = this.Nc = this.Nn = s.length;\n    const vals = this.vals = new Array(n);\n    if (n === 0) {\n      out._n([]);\n      out._c();\n    } else {\n      for (let i = 0; i < n; i++) {\n        vals[i] = NO;\n        s[i]._add(new CombineListener(i, out, this));\n      }\n    }\n  }\n\n  _stop(): void {\n    const s = this.insArr;\n    const n = s.length;\n    const ils = this.ils;\n    for (let i = 0; i < n; i++) s[i]._remove(ils[i]);\n    this.out = NO as Stream<Array<R>>;\n    this.ils = [];\n    this.vals = [];\n  }\n}\n\nclass FromArray<T> implements InternalProducer<T> {\n  public type = 'fromArray';\n  public a: Array<T>;\n\n  constructor(a: Array<T>) {\n    this.a = a;\n  }\n\n  _start(out: InternalListener<T>): void {\n    const a = this.a;\n    for (let i = 0, n = a.length; i < n; i++) out._n(a[i]);\n    out._c();\n  }\n\n  _stop(): void {\n  }\n}\n\nclass FromPromise<T> implements InternalProducer<T> {\n  public type = 'fromPromise';\n  public on: boolean;\n  public p: PromiseLike<T>;\n\n  constructor(p: PromiseLike<T>) {\n    this.on = false;\n    this.p = p;\n  }\n\n  _start(out: InternalListener<T>): void {\n    const prod = this;\n    this.on = true;\n    this.p.then(\n      (v: T) => {\n        if (prod.on) {\n          out._n(v);\n          out._c();\n        }\n      },\n      (e: any) => {\n        out._e(e);\n      },\n    ).then(noop, (err: any) => {\n      setTimeout(() => { throw err; });\n    });\n  }\n\n  _stop(): void {\n    this.on = false;\n  }\n}\n\nclass Periodic implements InternalProducer<number> {\n  public type = 'periodic';\n  public period: number;\n  private intervalID: any;\n  private i: number;\n\n  constructor(period: number) {\n    this.period = period;\n    this.intervalID = -1;\n    this.i = 0;\n  }\n\n  _start(out: InternalListener<number>): void {\n    const self = this;\n    function intervalHandler() { out._n(self.i++); }\n    this.intervalID = setInterval(intervalHandler, this.period);\n  }\n\n  _stop(): void {\n    if (this.intervalID !== -1) clearInterval(this.intervalID);\n    this.intervalID = -1;\n    this.i = 0;\n  }\n}\n\nclass Debug<T> implements Operator<T, T> {\n  public type = 'debug';\n  public ins: Stream<T>;\n  public out: Stream<T>;\n  private s: (t: T) => any; // spy\n  private l: string; // label\n\n  constructor(ins: Stream<T>);\n  constructor(ins: Stream<T>, arg?: string);\n  constructor(ins: Stream<T>, arg?: (t: T) => any);\n  constructor(ins: Stream<T>, arg?: string | ((t: T) => any));\n  constructor(ins: Stream<T>, arg?: string | ((t: T) => any) | undefined) {\n    this.ins = ins;\n    this.out = NO as Stream<T>;\n    this.s = noop;\n    this.l = '';\n    if (typeof arg === 'string') this.l = arg; else if (typeof arg === 'function') this.s = arg;\n  }\n\n  _start(out: Stream<T>): void {\n    this.out = out;\n    this.ins._add(this);\n  }\n\n  _stop(): void {\n    this.ins._remove(this);\n    this.out = NO as Stream<T>;\n  }\n\n  _n(t: T) {\n    const u = this.out;\n    if (u === NO) return;\n    const s = this.s, l = this.l;\n    if (s !== noop) {\n      try {\n        s(t);\n      } catch (e) {\n        u._e(e);\n      }\n    } else if (l) console.log(l + ':', t); else console.log(t);\n    u._n(t);\n  }\n\n  _e(err: any) {\n    const u = this.out;\n    if (u === NO) return;\n    u._e(err);\n  }\n\n  _c() {\n    const u = this.out;\n    if (u === NO) return;\n    u._c();\n  }\n}\n\nclass Drop<T> implements Operator<T, T> {\n  public type = 'drop';\n  public ins: Stream<T>;\n  public out: Stream<T>;\n  public max: number;\n  private dropped: number;\n\n  constructor(max: number, ins: Stream<T>) {\n    this.ins = ins;\n    this.out = NO as Stream<T>;\n    this.max = max;\n    this.dropped = 0;\n  }\n\n  _start(out: Stream<T>): void {\n    this.out = out;\n    this.dropped = 0;\n    this.ins._add(this);\n  }\n\n  _stop(): void {\n    this.ins._remove(this);\n    this.out = NO as Stream<T>;\n  }\n\n  _n(t: T) {\n    const u = this.out;\n    if (u === NO) return;\n    if (this.dropped++ >= this.max) u._n(t);\n  }\n\n  _e(err: any) {\n    const u = this.out;\n    if (u === NO) return;\n    u._e(err);\n  }\n\n  _c() {\n    const u = this.out;\n    if (u === NO) return;\n    u._c();\n  }\n}\n\nclass EndWhenListener<T> implements InternalListener<any> {\n  private out: Stream<T>;\n  private op: EndWhen<T>;\n\n  constructor(out: Stream<T>, op: EndWhen<T>) {\n    this.out = out;\n    this.op = op;\n  }\n\n  _n() {\n    this.op.end();\n  }\n\n  _e(err: any) {\n    this.out._e(err);\n  }\n\n  _c() {\n    this.op.end();\n  }\n}\n\nclass EndWhen<T> implements Operator<T, T> {\n  public type = 'endWhen';\n  public ins: Stream<T>;\n  public out: Stream<T>;\n  public o: Stream<any>; // o = other\n  private oil: InternalListener<any>; // oil = other InternalListener\n\n  constructor(o: Stream<any>, ins: Stream<T>) {\n    this.ins = ins;\n    this.out = NO as Stream<T>;\n    this.o = o;\n    this.oil = NO_IL;\n  }\n\n  _start(out: Stream<T>): void {\n    this.out = out;\n    this.o._add(this.oil = new EndWhenListener(out, this));\n    this.ins._add(this);\n  }\n\n  _stop(): void {\n    this.ins._remove(this);\n    this.o._remove(this.oil);\n    this.out = NO as Stream<T>;\n    this.oil = NO_IL;\n  }\n\n  end(): void {\n    const u = this.out;\n    if (u === NO) return;\n    u._c();\n  }\n\n  _n(t: T) {\n    const u = this.out;\n    if (u === NO) return;\n    u._n(t);\n  }\n\n  _e(err: any) {\n    const u = this.out;\n    if (u === NO) return;\n    u._e(err);\n  }\n\n  _c() {\n    this.end();\n  }\n}\n\nclass Filter<T> implements Operator<T, T> {\n  public type = 'filter';\n  public ins: Stream<T>;\n  public out: Stream<T>;\n  public f: (t: T) => boolean;\n\n  constructor(passes: (t: T) => boolean, ins: Stream<T>) {\n    this.ins = ins;\n    this.out = NO as Stream<T>;\n    this.f = passes;\n  }\n\n  _start(out: Stream<T>): void {\n    this.out = out;\n    this.ins._add(this);\n  }\n\n  _stop(): void {\n    this.ins._remove(this);\n    this.out = NO as Stream<T>;\n  }\n\n  _n(t: T) {\n    const u = this.out;\n    if (u === NO) return;\n    const r = _try(this, t, u);\n    if (r === NO || !r) return;\n    u._n(t);\n  }\n\n  _e(err: any) {\n    const u = this.out;\n    if (u === NO) return;\n    u._e(err);\n  }\n\n  _c() {\n    const u = this.out;\n    if (u === NO) return;\n    u._c();\n  }\n}\n\nclass FlattenListener<T> implements InternalListener<T> {\n  private out: Stream<T>;\n  private op: Flatten<T>;\n\n  constructor(out: Stream<T>, op: Flatten<T>) {\n    this.out = out;\n    this.op = op;\n  }\n\n  _n(t: T) {\n    this.out._n(t);\n  }\n\n  _e(err: any) {\n    this.out._e(err);\n  }\n\n  _c() {\n    this.op.inner = NO as Stream<T>;\n    this.op.less();\n  }\n}\n\nclass Flatten<T> implements Operator<Stream<T>, T> {\n  public type = 'flatten';\n  public ins: Stream<Stream<T>>;\n  public out: Stream<T>;\n  private open: boolean;\n  public inner: Stream<T>; // Current inner Stream\n  private il: InternalListener<T>; // Current inner InternalListener\n\n  constructor(ins: Stream<Stream<T>>) {\n    this.ins = ins;\n    this.out = NO as Stream<T>;\n    this.open = true;\n    this.inner = NO as Stream<T>;\n    this.il = NO_IL;\n  }\n\n  _start(out: Stream<T>): void {\n    this.out = out;\n    this.open = true;\n    this.inner = NO as Stream<T>;\n    this.il = NO_IL;\n    this.ins._add(this);\n  }\n\n  _stop(): void {\n    this.ins._remove(this);\n    if (this.inner !== NO) this.inner._remove(this.il);\n    this.out = NO as Stream<T>;\n    this.open = true;\n    this.inner = NO as Stream<T>;\n    this.il = NO_IL;\n  }\n\n  less(): void {\n    const u = this.out;\n    if (u === NO) return;\n    if (!this.open && this.inner === NO) u._c();\n  }\n\n  _n(s: Stream<T>) {\n    const u = this.out;\n    if (u === NO) return;\n    const { inner, il } = this;\n    if (inner !== NO && il !== NO_IL) inner._remove(il);\n    (this.inner = s)._add(this.il = new FlattenListener(u, this));\n  }\n\n  _e(err: any) {\n    const u = this.out;\n    if (u === NO) return;\n    u._e(err);\n  }\n\n  _c() {\n    this.open = false;\n    this.less();\n  }\n}\n\nclass Fold<T, R> implements Operator<T, R> {\n  public type = 'fold';\n  public ins: Stream<T>;\n  public out: Stream<R>;\n  public f: (t: T) => R;\n  public seed: R;\n  private acc: R; // initialized as seed\n\n  constructor(f: (acc: R, t: T) => R, seed: R, ins: Stream<T>) {\n    this.ins = ins;\n    this.out = NO as Stream<R>;\n    this.f = (t: T) => f(this.acc, t);\n    this.acc = this.seed = seed;\n  }\n\n  _start(out: Stream<R>): void {\n    this.out = out;\n    this.acc = this.seed;\n    out._n(this.acc);\n    this.ins._add(this);\n  }\n\n  _stop(): void {\n    this.ins._remove(this);\n    this.out = NO as Stream<R>;\n    this.acc = this.seed;\n  }\n\n  _n(t: T) {\n    const u = this.out;\n    if (u === NO) return;\n    const r = _try(this, t, u);\n    if (r === NO) return;\n    u._n(this.acc = r as R);\n  }\n\n  _e(err: any) {\n    const u = this.out;\n    if (u === NO) return;\n    u._e(err);\n  }\n\n  _c() {\n    const u = this.out;\n    if (u === NO) return;\n    u._c();\n  }\n}\n\nclass Last<T> implements Operator<T, T> {\n  public type = 'last';\n  public ins: Stream<T>;\n  public out: Stream<T>;\n  private has: boolean;\n  private val: T;\n\n  constructor(ins: Stream<T>) {\n    this.ins = ins;\n    this.out = NO as Stream<T>;\n    this.has = false;\n    this.val = NO as T;\n  }\n\n  _start(out: Stream<T>): void {\n    this.out = out;\n    this.has = false;\n    this.ins._add(this);\n  }\n\n  _stop(): void {\n    this.ins._remove(this);\n    this.out = NO as Stream<T>;\n    this.val = NO as T;\n  }\n\n  _n(t: T) {\n    this.has = true;\n    this.val = t;\n  }\n\n  _e(err: any) {\n    const u = this.out;\n    if (u === NO) return;\n    u._e(err);\n  }\n\n  _c() {\n    const u = this.out;\n    if (u === NO) return;\n    if (this.has) {\n      u._n(this.val);\n      u._c();\n    } else u._e(new Error('last() failed because input stream completed'));\n  }\n}\n\nclass MapOp<T, R> implements Operator<T, R> {\n  public type = 'map';\n  public ins: Stream<T>;\n  public out: Stream<R>;\n  public f: (t: T) => R;\n\n  constructor(project: (t: T) => R, ins: Stream<T>) {\n    this.ins = ins;\n    this.out = NO as Stream<R>;\n    this.f = project;\n  }\n\n  _start(out: Stream<R>): void {\n    this.out = out;\n    this.ins._add(this);\n  }\n\n  _stop(): void {\n    this.ins._remove(this);\n    this.out = NO as Stream<R>;\n  }\n\n  _n(t: T) {\n    const u = this.out;\n    if (u === NO) return;\n    const r = _try(this, t, u);\n    if (r === NO) return;\n    u._n(r as R);\n  }\n\n  _e(err: any) {\n    const u = this.out;\n    if (u === NO) return;\n    u._e(err);\n  }\n\n  _c() {\n    const u = this.out;\n    if (u === NO) return;\n    u._c();\n  }\n}\n\nclass Remember<T> implements InternalProducer<T> {\n  public type = 'remember';\n  public ins: Stream<T>;\n  public out: Stream<T>;\n\n  constructor(ins: Stream<T>) {\n    this.ins = ins;\n    this.out = NO as Stream<T>;\n  }\n\n  _start(out: Stream<T>): void {\n    this.out = out;\n    this.ins._add(out);\n  }\n\n  _stop(): void {\n    this.ins._remove(this.out);\n    this.out = NO as Stream<T>;\n  }\n}\n\nclass ReplaceError<T> implements Operator<T, T> {\n  public type = 'replaceError';\n  public ins: Stream<T>;\n  public out: Stream<T>;\n  public f: (err: any) => Stream<T>;\n\n  constructor(replacer: (err: any) => Stream<T>, ins: Stream<T>) {\n    this.ins = ins;\n    this.out = NO as Stream<T>;\n    this.f = replacer;\n  }\n\n  _start(out: Stream<T>): void {\n    this.out = out;\n    this.ins._add(this);\n  }\n\n  _stop(): void {\n    this.ins._remove(this);\n    this.out = NO as Stream<T>;\n  }\n\n  _n(t: T) {\n    const u = this.out;\n    if (u === NO) return;\n    u._n(t);\n  }\n\n  _e(err: any) {\n    const u = this.out;\n    if (u === NO) return;\n    try {\n      this.ins._remove(this);\n      (this.ins = this.f(err))._add(this);\n    } catch (e) {\n      u._e(e);\n    }\n  }\n\n  _c() {\n    const u = this.out;\n    if (u === NO) return;\n    u._c();\n  }\n}\n\nclass StartWith<T> implements InternalProducer<T> {\n  public type = 'startWith';\n  public ins: Stream<T>;\n  public out: Stream<T>;\n  public val: T;\n\n  constructor(ins: Stream<T>, val: T) {\n    this.ins = ins;\n    this.out = NO as Stream<T>;\n    this.val = val;\n  }\n\n  _start(out: Stream<T>): void {\n    this.out = out;\n    this.out._n(this.val);\n    this.ins._add(out);\n  }\n\n  _stop(): void {\n    this.ins._remove(this.out);\n    this.out = NO as Stream<T>;\n  }\n}\n\nclass Take<T> implements Operator<T, T> {\n  public type = 'take';\n  public ins: Stream<T>;\n  public out: Stream<T>;\n  public max: number;\n  private taken: number;\n\n  constructor(max: number, ins: Stream<T>) {\n    this.ins = ins;\n    this.out = NO as Stream<T>;\n    this.max = max;\n    this.taken = 0;\n  }\n\n  _start(out: Stream<T>): void {\n    this.out = out;\n    this.taken = 0;\n    if (this.max <= 0) out._c(); else this.ins._add(this);\n  }\n\n  _stop(): void {\n    this.ins._remove(this);\n    this.out = NO as Stream<T>;\n  }\n\n  _n(t: T) {\n    const u = this.out;\n    if (u === NO) return;\n    const m = ++this.taken;\n    if (m < this.max) u._n(t); else if (m === this.max) {\n      u._n(t);\n      u._c();\n    }\n  }\n\n  _e(err: any) {\n    const u = this.out;\n    if (u === NO) return;\n    u._e(err);\n  }\n\n  _c() {\n    const u = this.out;\n    if (u === NO) return;\n    u._c();\n  }\n}\n\nexport class Stream<T> implements InternalListener<T> {\n  public _prod: InternalProducer<T>;\n  protected _ils: Array<InternalListener<T>>; // 'ils' = Internal listeners\n  protected _stopID: any;\n  protected _dl: InternalListener<T>; // the debug listener\n  protected _d: boolean; // flag indicating the existence of the debug listener\n  protected _target: Stream<T> | null; // imitation target if this Stream will imitate\n  protected _err: any;\n\n  constructor(producer?: InternalProducer<T>) {\n    this._prod = producer || NO as InternalProducer<T>;\n    this._ils = [];\n    this._stopID = NO;\n    this._dl = NO as InternalListener<T>;\n    this._d = false;\n    this._target = null;\n    this._err = NO;\n  }\n\n  _n(t: T): void {\n    const a = this._ils;\n    const L = a.length;\n    if (this._d) this._dl._n(t);\n    if (L == 1) a[0]._n(t); else if (L == 0) return; else {\n      const b = cp(a);\n      for (let i = 0; i < L; i++) b[i]._n(t);\n    }\n  }\n\n  _e(err: any): void {\n    if (this._err !== NO) return;\n    this._err = err;\n    const a = this._ils;\n    const L = a.length;\n    this._x();\n    if (this._d) this._dl._e(err);\n    if (L == 1) a[0]._e(err); else if (L == 0) return; else {\n      const b = cp(a);\n      for (let i = 0; i < L; i++) b[i]._e(err);\n    }\n    if (!this._d && L == 0) throw this._err;\n  }\n\n  _c(): void {\n    const a = this._ils;\n    const L = a.length;\n    this._x();\n    if (this._d) this._dl._c();\n    if (L == 1) a[0]._c(); else if (L == 0) return; else {\n      const b = cp(a);\n      for (let i = 0; i < L; i++) b[i]._c();\n    }\n  }\n\n  _x(): void { // tear down logic, after error or complete\n    if (this._ils.length === 0) return;\n    if (this._prod !== NO) this._prod._stop();\n    this._err = NO;\n    this._ils = [];\n  }\n\n  _stopNow() {\n    // WARNING: code that calls this method should\n    // first check if this._prod is valid (not `NO`)\n    this._prod._stop();\n    this._err = NO;\n    this._stopID = NO;\n  }\n\n  _add(il: InternalListener<T>): void {\n    const ta = this._target;\n    if (ta) return ta._add(il);\n    const a = this._ils;\n    a.push(il);\n    if (a.length > 1) return;\n    if (this._stopID !== NO) {\n      clearTimeout(this._stopID);\n      this._stopID = NO;\n    } else {\n      const p = this._prod;\n      if (p !== NO) p._start(this);\n    }\n  }\n\n  _remove(il: InternalListener<T>): void {\n    const ta = this._target;\n    if (ta) return ta._remove(il);\n    const a = this._ils;\n    const i = a.indexOf(il);\n    if (i > -1) {\n      a.splice(i, 1);\n      if (this._prod !== NO && a.length <= 0) {\n        this._err = NO;\n        this._stopID = setTimeout(() => this._stopNow());\n      } else if (a.length === 1) {\n        this._pruneCycles();\n      }\n    }\n  }\n\n  // If all paths stemming from `this` stream eventually end at `this`\n  // stream, then we remove the single listener of `this` stream, to\n  // force it to end its execution and dispose resources. This method\n  // assumes as a precondition that this._ils has just one listener.\n  _pruneCycles() {\n    if (this._hasNoSinks(this, [])) this._remove(this._ils[0]);\n  }\n\n  // Checks whether *there is no* path starting from `x` that leads to an end\n  // listener (sink) in the stream graph, following edges A->B where B is a\n  // listener of A. This means these paths constitute a cycle somehow. Is given\n  // a trace of all visited nodes so far.\n  _hasNoSinks(x: InternalListener<any>, trace: Array<any>): boolean {\n    if (trace.indexOf(x) !== -1)\n      return true; else\n      if ((x as any as OutSender<any>).out === this)\n        return true; else\n        if ((x as any as OutSender<any>).out && (x as any as OutSender<any>).out !== NO)\n          return this._hasNoSinks((x as any as OutSender<any>).out, trace.concat(x)); else\n          if ((x as Stream<any>)._ils) {\n            for (let i = 0, N = (x as Stream<any>)._ils.length; i < N; i++)\n              if (!this._hasNoSinks((x as Stream<any>)._ils[i], trace.concat(x)))\n                return false;\n            return true;\n          } else return false;\n  }\n\n  private ctor(): typeof Stream {\n    return this instanceof MemoryStream ? MemoryStream : Stream;\n  }\n\n  /**\n   * Adds a Listener to the Stream.\n   *\n   * @param {Listener} listener\n   */\n  addListener(listener: Partial<Listener<T>>): void {\n    (listener as InternalListener<T>)._n = listener.next || noop;\n    (listener as InternalListener<T>)._e = listener.error || noop;\n    (listener as InternalListener<T>)._c = listener.complete || noop;\n    this._add(listener as InternalListener<T>);\n  }\n\n  /**\n   * Removes a Listener from the Stream, assuming the Listener was added to it.\n   *\n   * @param {Listener<T>} listener\n   */\n  removeListener(listener: Partial<Listener<T>>): void {\n    this._remove(listener as InternalListener<T>);\n  }\n\n  /**\n   * Adds a Listener to the Stream returning a Subscription to remove that\n   * listener.\n   *\n   * @param {Listener} listener\n   * @returns {Subscription}\n   */\n  subscribe(listener: Partial<Listener<T>>): Subscription {\n    this.addListener(listener);\n    return new StreamSub<T>(this, listener as InternalListener<T>);\n  }\n\n  /**\n   * Add interop between most.js and RxJS 5\n   *\n   * @returns {Stream}\n   */\n  [$$observable](): Stream<T> {\n    return this;\n  }\n\n  /**\n   * Creates a new Stream given a Producer.\n   *\n   * @factory true\n   * @param {Producer} producer An optional Producer that dictates how to\n   * start, generate events, and stop the Stream.\n   * @return {Stream}\n   */\n  static create<T>(producer?: Producer<T>): Stream<T> {\n    if (producer) {\n      if (typeof producer.start !== 'function'\n        || typeof producer.stop !== 'function')\n        throw new Error('producer requires both start and stop functions');\n      internalizeProducer(producer); // mutates the input\n    }\n    return new Stream(producer as InternalProducer<T> & Producer<T>);\n  }\n\n  /**\n   * Creates a new MemoryStream given a Producer.\n   *\n   * @factory true\n   * @param {Producer} producer An optional Producer that dictates how to\n   * start, generate events, and stop the Stream.\n   * @return {MemoryStream}\n   */\n  static createWithMemory<T>(producer?: Producer<T>): MemoryStream<T> {\n    if (producer) internalizeProducer(producer); // mutates the input\n    return new MemoryStream<T>(producer as InternalProducer<T> & Producer<T>);\n  }\n\n  /**\n   * Creates a Stream that does nothing when started. It never emits any event.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   *          never\n   * -----------------------\n   * ```\n   *\n   * @factory true\n   * @return {Stream}\n   */\n  static never<T = any>(): Stream<T> {\n    return new Stream<T>({ _start: noop, _stop: noop });\n  }\n\n  /**\n   * Creates a Stream that immediately emits the \"complete\" notification when\n   * started, and that's it.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * empty\n   * -|\n   * ```\n   *\n   * @factory true\n   * @return {Stream}\n   */\n  static empty<T = any>(): Stream<T> {\n    return new Stream<T>({\n      _start(il: InternalListener<any>) { il._c(); },\n      _stop: noop,\n    });\n  }\n\n  /**\n   * Creates a Stream that immediately emits an \"error\" notification with the\n   * value you passed as the `error` argument when the stream starts, and that's\n   * it.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * throw(X)\n   * -X\n   * ```\n   *\n   * @factory true\n   * @param error The error event to emit on the created stream.\n   * @return {Stream}\n   */\n  static throw(error: any): Stream<any> {\n    return new Stream<any>({\n      _start(il: InternalListener<any>) { il._e(error); },\n      _stop: noop,\n    });\n  }\n\n  /**\n   * Creates a stream from an Array, Promise, or an Observable.\n   *\n   * @factory true\n   * @param {Array|PromiseLike|Observable} input The input to make a stream from.\n   * @return {Stream}\n   */\n  static from<T>(input: PromiseLike<T> | Stream<T> | Array<T> | Observable<T>): Stream<T> {\n    if (typeof input[$$observable] === 'function')\n      return Stream.fromObservable<T>(input as Observable<T>); else\n      if (typeof (input as PromiseLike<T>).then === 'function')\n        return Stream.fromPromise<T>(input as PromiseLike<T>); else\n        if (Array.isArray(input))\n          return Stream.fromArray<T>(input);\n\n    throw new TypeError(`Type of input to from() must be an Array, Promise, or Observable`);\n  }\n\n  /**\n   * Creates a Stream that immediately emits the arguments that you give to\n   * *of*, then completes.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * of(1,2,3)\n   * 123|\n   * ```\n   *\n   * @factory true\n   * @param a The first value you want to emit as an event on the stream.\n   * @param b The second value you want to emit as an event on the stream. One\n   * or more of these values may be given as arguments.\n   * @return {Stream}\n   */\n  static of<T>(...items: Array<T>): Stream<T> {\n    return Stream.fromArray<T>(items);\n  }\n\n  /**\n   * Converts an array to a stream. The returned stream will emit synchronously\n   * all the items in the array, and then complete.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * fromArray([1,2,3])\n   * 123|\n   * ```\n   *\n   * @factory true\n   * @param {Array} array The array to be converted as a stream.\n   * @return {Stream}\n   */\n  static fromArray<T>(array: Array<T>): Stream<T> {\n    return new Stream<T>(new FromArray<T>(array));\n  }\n\n  /**\n   * Converts a promise to a stream. The returned stream will emit the resolved\n   * value of the promise, and then complete. However, if the promise is\n   * rejected, the stream will emit the corresponding error.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * fromPromise( ----42 )\n   * -----------------42|\n   * ```\n   *\n   * @factory true\n   * @param {PromiseLike} promise The promise to be converted as a stream.\n   * @return {Stream}\n   */\n  static fromPromise<T>(promise: PromiseLike<T>): Stream<T> {\n    return new Stream<T>(new FromPromise<T>(promise));\n  }\n\n  /**\n   * Converts an Observable into a Stream.\n   *\n   * @factory true\n   * @param {any} observable The observable to be converted as a stream.\n   * @return {Stream}\n   */\n  static fromObservable<T>(obs: { subscribe: any }): Stream<T> {\n    if ((obs as Stream<T>).endWhen !== undefined) return obs as Stream<T>;\n    const o = typeof obs[$$observable] === 'function' ? obs[$$observable]() : obs;\n    return new Stream<T>(new FromObservable(o));\n  }\n\n  /**\n   * Creates a stream that periodically emits incremental numbers, every\n   * `period` milliseconds.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   *     periodic(1000)\n   * ---0---1---2---3---4---...\n   * ```\n   *\n   * @factory true\n   * @param {number} period The interval in milliseconds to use as a rate of\n   * emission.\n   * @return {Stream}\n   */\n  static periodic(period: number): Stream<number> {\n    return new Stream<number>(new Periodic(period));\n  }\n\n  /**\n   * Blends multiple streams together, emitting events from all of them\n   * concurrently.\n   *\n   * *merge* takes multiple streams as arguments, and creates a stream that\n   * behaves like each of the argument streams, in parallel.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * --1----2-----3--------4---\n   * ----a-----b----c---d------\n   *            merge\n   * --1-a--2--b--3-c---d--4---\n   * ```\n   *\n   * @factory true\n   * @param {Stream} stream1 A stream to merge together with other streams.\n   * @param {Stream} stream2 A stream to merge together with other streams. Two\n   * or more streams may be given as arguments.\n   * @return {Stream}\n   */\n  static merge: MergeSignature = function merge(...streams: Array<Stream<any>>) {\n    return new Stream<any>(new Merge(streams));\n  } as MergeSignature;\n\n  /**\n   * Combines multiple input streams together to return a stream whose events\n   * are arrays that collect the latest events from each input stream.\n   *\n   * *combine* internally remembers the most recent event from each of the input\n   * streams. When any of the input streams emits an event, that event together\n   * with all the other saved events are combined into an array. That array will\n   * be emitted on the output stream. It's essentially a way of joining together\n   * the events from multiple streams.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * --1----2-----3--------4---\n   * ----a-----b-----c--d------\n   *          combine\n   * ----1a-2a-2b-3b-3c-3d-4d--\n   * ```\n   *\n   * @factory true\n   * @param {Stream} stream1 A stream to combine together with other streams.\n   * @param {Stream} stream2 A stream to combine together with other streams.\n   * Multiple streams, not just two, may be given as arguments.\n   * @return {Stream}\n   */\n  static combine: CombineSignature = function combine(...streams: Array<Stream<any>>) {\n    return new Stream<Array<any>>(new Combine<any>(streams));\n  } as CombineSignature;\n\n  protected _map<U>(project: (t: T) => U): Stream<U> | MemoryStream<U> {\n    return new (this.ctor())<U>(new MapOp<T, U>(project, this));\n  }\n\n  /**\n   * Transforms each event from the input Stream through a `project` function,\n   * to get a Stream that emits those transformed events.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * --1---3--5-----7------\n   *    map(i => i * 10)\n   * --10--30-50----70-----\n   * ```\n   *\n   * @param {Function} project A function of type `(t: T) => U` that takes event\n   * `t` of type `T` from the input Stream and produces an event of type `U`, to\n   * be emitted on the output Stream.\n   * @return {Stream}\n   */\n  map<U>(project: (t: T) => U): Stream<U> {\n    return this._map(project);\n  }\n\n  /**\n   * It's like `map`, but transforms each input event to always the same\n   * constant value on the output Stream.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * --1---3--5-----7-----\n   *       mapTo(10)\n   * --10--10-10----10----\n   * ```\n   *\n   * @param projectedValue A value to emit on the output Stream whenever the\n   * input Stream emits any value.\n   * @return {Stream}\n   */\n  mapTo<U>(projectedValue: U): Stream<U> {\n    const s = this.map(() => projectedValue);\n    const op: Operator<T, U> = s._prod as Operator<T, U>;\n    op.type = 'mapTo';\n    return s;\n  }\n\n  filter<S extends T>(passes: (t: T) => t is S): Stream<S>;\n  filter(passes: (t: T) => boolean): Stream<T>;\n  /**\n   * Only allows events that pass the test given by the `passes` argument.\n   *\n   * Each event from the input stream is given to the `passes` function. If the\n   * function returns `true`, the event is forwarded to the output stream,\n   * otherwise it is ignored and not forwarded.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * --1---2--3-----4-----5---6--7-8--\n   *     filter(i => i % 2 === 0)\n   * ------2--------4---------6----8--\n   * ```\n   *\n   * @param {Function} passes A function of type `(t: T) => boolean` that takes\n   * an event from the input stream and checks if it passes, by returning a\n   * boolean.\n   * @return {Stream}\n   */\n  filter(passes: (t: T) => boolean): Stream<T> {\n    const p = this._prod;\n    if (p instanceof Filter)\n      return new Stream<T>(new Filter<T>(\n        and((p as Filter<T>).f, passes),\n        (p as Filter<T>).ins\n      ));\n    return new Stream<T>(new Filter<T>(passes, this));\n  }\n\n  /**\n   * Lets the first `amount` many events from the input stream pass to the\n   * output stream, then makes the output stream complete.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * --a---b--c----d---e--\n   *    take(3)\n   * --a---b--c|\n   * ```\n   *\n   * @param {number} amount How many events to allow from the input stream\n   * before completing the output stream.\n   * @return {Stream}\n   */\n  take(amount: number): Stream<T> {\n    return new (this.ctor())<T>(new Take<T>(amount, this));\n  }\n\n  /**\n   * Ignores the first `amount` many events from the input stream, and then\n   * after that starts forwarding events from the input stream to the output\n   * stream.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * --a---b--c----d---e--\n   *       drop(3)\n   * --------------d---e--\n   * ```\n   *\n   * @param {number} amount How many events to ignore from the input stream\n   * before forwarding all events from the input stream to the output stream.\n   * @return {Stream}\n   */\n  drop(amount: number): Stream<T> {\n    return new Stream<T>(new Drop<T>(amount, this));\n  }\n\n  /**\n   * When the input stream completes, the output stream will emit the last event\n   * emitted by the input stream, and then will also complete.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * --a---b--c--d----|\n   *       last()\n   * -----------------d|\n   * ```\n   *\n   * @return {Stream}\n   */\n  last(): Stream<T> {\n    return new Stream<T>(new Last<T>(this));\n  }\n\n  /**\n   * Prepends the given `initial` value to the sequence of events emitted by the\n   * input stream. The returned stream is a MemoryStream, which means it is\n   * already `remember()`'d.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * ---1---2-----3---\n   *   startWith(0)\n   * 0--1---2-----3---\n   * ```\n   *\n   * @param initial The value or event to prepend.\n   * @return {MemoryStream}\n   */\n  startWith(initial: T): MemoryStream<T> {\n    return new MemoryStream<T>(new StartWith<T>(this, initial));\n  }\n\n  /**\n   * Uses another stream to determine when to complete the current stream.\n   *\n   * When the given `other` stream emits an event or completes, the output\n   * stream will complete. Before that happens, the output stream will behaves\n   * like the input stream.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * ---1---2-----3--4----5----6---\n   *   endWhen( --------a--b--| )\n   * ---1---2-----3--4--|\n   * ```\n   *\n   * @param other Some other stream that is used to know when should the output\n   * stream of this operator complete.\n   * @return {Stream}\n   */\n  endWhen(other: Stream<any>): Stream<T> {\n    return new (this.ctor())<T>(new EndWhen<T>(other, this));\n  }\n\n  /**\n   * \"Folds\" the stream onto itself.\n   *\n   * Combines events from the past throughout\n   * the entire execution of the input stream, allowing you to accumulate them\n   * together. It's essentially like `Array.prototype.reduce`. The returned\n   * stream is a MemoryStream, which means it is already `remember()`'d.\n   *\n   * The output stream starts by emitting the `seed` which you give as argument.\n   * Then, when an event happens on the input stream, it is combined with that\n   * seed value through the `accumulate` function, and the output value is\n   * emitted on the output stream. `fold` remembers that output value as `acc`\n   * (\"accumulator\"), and then when a new input event `t` happens, `acc` will be\n   * combined with that to produce the new `acc` and so forth.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * ------1-----1--2----1----1------\n   *   fold((acc, x) => acc + x, 3)\n   * 3-----4-----5--7----8----9------\n   * ```\n   *\n   * @param {Function} accumulate A function of type `(acc: R, t: T) => R` that\n   * takes the previous accumulated value `acc` and the incoming event from the\n   * input stream and produces the new accumulated value.\n   * @param seed The initial accumulated value, of type `R`.\n   * @return {MemoryStream}\n   */\n  fold<R>(accumulate: (acc: R, t: T) => R, seed: R): MemoryStream<R> {\n    return new MemoryStream<R>(new Fold<T, R>(accumulate, seed, this));\n  }\n\n  /**\n   * Replaces an error with another stream.\n   *\n   * When (and if) an error happens on the input stream, instead of forwarding\n   * that error to the output stream, *replaceError* will call the `replace`\n   * function which returns the stream that the output stream will replicate.\n   * And, in case that new stream also emits an error, `replace` will be called\n   * again to get another stream to start replicating.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * --1---2-----3--4-----X\n   *   replaceError( () => --10--| )\n   * --1---2-----3--4--------10--|\n   * ```\n   *\n   * @param {Function} replace A function of type `(err) => Stream` that takes\n   * the error that occurred on the input stream or on the previous replacement\n   * stream and returns a new stream. The output stream will behave like the\n   * stream that this function returns.\n   * @return {Stream}\n   */\n  replaceError(replace: (err: any) => Stream<T>): Stream<T> {\n    return new (this.ctor())<T>(new ReplaceError<T>(replace, this));\n  }\n\n  /**\n   * Flattens a \"stream of streams\", handling only one nested stream at a time\n   * (no concurrency).\n   *\n   * If the input stream is a stream that emits streams, then this operator will\n   * return an output stream which is a flat stream: emits regular events. The\n   * flattening happens without concurrency. It works like this: when the input\n   * stream emits a nested stream, *flatten* will start imitating that nested\n   * one. However, as soon as the next nested stream is emitted on the input\n   * stream, *flatten* will forget the previous nested one it was imitating, and\n   * will start imitating the new nested one.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * --+--------+---------------\n   *   \\        \\\n   *    \\       ----1----2---3--\n   *    --a--b----c----d--------\n   *           flatten\n   * -----a--b------1----2---3--\n   * ```\n   *\n   * @return {Stream}\n   */\n  flatten<R>(this: Stream<Stream<R> | MemoryStream<R>>): Stream<R> {\n    return new Stream<R>(new Flatten(this));\n  }\n\n  /**\n   * Passes the input stream to a custom operator, to produce an output stream.\n   *\n   * *compose* is a handy way of using an existing function in a chained style.\n   * Instead of writing `outStream = f(inStream)` you can write\n   * `outStream = inStream.compose(f)`.\n   *\n   * @param {function} operator A function that takes a stream as input and\n   * returns a stream as well.\n   * @return {Stream}\n   */\n  compose<U>(operator: (stream: Stream<T>) => U): U {\n    return operator(this);\n  }\n\n  /**\n   * Returns an output stream that behaves like the input stream, but also\n   * remembers the most recent event that happens on the input stream, so that a\n   * newly added listener will immediately receive that memorised event.\n   *\n   * @return {MemoryStream}\n   */\n  remember(): MemoryStream<T> {\n    return new MemoryStream<T>(new Remember<T>(this));\n  }\n\n  debug(): Stream<T>;\n  debug(labelOrSpy: string): Stream<T>;\n  debug(labelOrSpy: (t: T) => any): Stream<T>;\n  /**\n   * Returns an output stream that identically behaves like the input stream,\n   * but also runs a `spy` function for each event, to help you debug your app.\n   *\n   * *debug* takes a `spy` function as argument, and runs that for each event\n   * happening on the input stream. If you don't provide the `spy` argument,\n   * then *debug* will just `console.log` each event. This helps you to\n   * understand the flow of events through some operator chain.\n   *\n   * Please note that if the output stream has no listeners, then it will not\n   * start, which means `spy` will never run because no actual event happens in\n   * that case.\n   *\n   * Marble diagram:\n   *\n   * ```text\n   * --1----2-----3-----4--\n   *         debug\n   * --1----2-----3-----4--\n   * ```\n   *\n   * @param {function} labelOrSpy A string to use as the label when printing\n   * debug information on the console, or a 'spy' function that takes an event\n   * as argument, and does not need to return anything.\n   * @return {Stream}\n   */\n  debug(labelOrSpy?: string | ((t: T) => any)): Stream<T> {\n    return new (this.ctor())<T>(new Debug<T>(this, labelOrSpy));\n  }\n\n  /**\n   * *imitate* changes this current Stream to emit the same events that the\n   * `other` given Stream does. This method returns nothing.\n   *\n   * This method exists to allow one thing: **circular dependency of streams**.\n   * For instance, let's imagine that for some reason you need to create a\n   * circular dependency where stream `first$` depends on stream `second$`\n   * which in turn depends on `first$`:\n   *\n   * <!-- skip-example -->\n   * ```js\n   * import delay from 'xstream/extra/delay'\n   *\n   * var first$ = second$.map(x => x * 10).take(3);\n   * var second$ = first$.map(x => x + 1).startWith(1).compose(delay(100));\n   * ```\n   *\n   * However, that is invalid JavaScript, because `second$` is undefined\n   * on the first line. This is how *imitate* can help solve it:\n   *\n   * ```js\n   * import delay from 'xstream/extra/delay'\n   *\n   * var secondProxy$ = xs.create();\n   * var first$ = secondProxy$.map(x => x * 10).take(3);\n   * var second$ = first$.map(x => x + 1).startWith(1).compose(delay(100));\n   * secondProxy$.imitate(second$);\n   * ```\n   *\n   * We create `secondProxy$` before the others, so it can be used in the\n   * declaration of `first$`. Then, after both `first$` and `second$` are\n   * defined, we hook `secondProxy$` with `second$` with `imitate()` to tell\n   * that they are \"the same\". `imitate` will not trigger the start of any\n   * stream, it just binds `secondProxy$` and `second$` together.\n   *\n   * The following is an example where `imitate()` is important in Cycle.js\n   * applications. A parent component contains some child components. A child\n   * has an action stream which is given to the parent to define its state:\n   *\n   * <!-- skip-example -->\n   * ```js\n   * const childActionProxy$ = xs.create();\n   * const parent = Parent({...sources, childAction$: childActionProxy$});\n   * const childAction$ = parent.state$.map(s => s.child.action$).flatten();\n   * childActionProxy$.imitate(childAction$);\n   * ```\n   *\n   * Note, though, that **`imitate()` does not support MemoryStreams**. If we\n   * would attempt to imitate a MemoryStream in a circular dependency, we would\n   * either get a race condition (where the symptom would be \"nothing happens\")\n   * or an infinite cyclic emission of values. It's useful to think about\n   * MemoryStreams as cells in a spreadsheet. It doesn't make any sense to\n   * define a spreadsheet cell `A1` with a formula that depends on `B1` and\n   * cell `B1` defined with a formula that depends on `A1`.\n   *\n   * If you find yourself wanting to use `imitate()` with a\n   * MemoryStream, you should rework your code around `imitate()` to use a\n   * Stream instead. Look for the stream in the circular dependency that\n   * represents an event stream, and that would be a candidate for creating a\n   * proxy Stream which then imitates the target Stream.\n   *\n   * @param {Stream} target The other stream to imitate on the current one. Must\n   * not be a MemoryStream.\n   */\n  imitate(target: Stream<T>): void {\n    if (target instanceof MemoryStream)\n      throw new Error('A MemoryStream was given to imitate(), but it only ' +\n        'supports a Stream. Read more about this restriction here: ' +\n        'https://github.com/staltz/xstream#faq');\n    this._target = target;\n    for (let ils = this._ils, N = ils.length, i = 0; i < N; i++) target._add(ils[i]);\n    this._ils = [];\n  }\n\n  /**\n   * Forces the Stream to emit the given value to its listeners.\n   *\n   * As the name indicates, if you use this, you are most likely doing something\n   * The Wrong Way. Please try to understand the reactive way before using this\n   * method. Use it only when you know what you are doing.\n   *\n   * @param value The \"next\" value you want to broadcast to all listeners of\n   * this Stream.\n   */\n  shamefullySendNext(value: T) {\n    this._n(value);\n  }\n\n  /**\n   * Forces the Stream to emit the given error to its listeners.\n   *\n   * As the name indicates, if you use this, you are most likely doing something\n   * The Wrong Way. Please try to understand the reactive way before using this\n   * method. Use it only when you know what you are doing.\n   *\n   * @param {any} error The error you want to broadcast to all the listeners of\n   * this Stream.\n   */\n  shamefullySendError(error: any) {\n    this._e(error);\n  }\n\n  /**\n   * Forces the Stream to emit the \"completed\" event to its listeners.\n   *\n   * As the name indicates, if you use this, you are most likely doing something\n   * The Wrong Way. Please try to understand the reactive way before using this\n   * method. Use it only when you know what you are doing.\n   */\n  shamefullySendComplete() {\n    this._c();\n  }\n\n  /**\n   * Adds a \"debug\" listener to the stream. There can only be one debug\n   * listener, that's why this is 'setDebugListener'. To remove the debug\n   * listener, just call setDebugListener(null).\n   *\n   * A debug listener is like any other listener. The only difference is that a\n   * debug listener is \"stealthy\": its presence/absence does not trigger the\n   * start/stop of the stream (or the producer inside the stream). This is\n   * useful so you can inspect what is going on without changing the behavior\n   * of the program. If you have an idle stream and you add a normal listener to\n   * it, the stream will start executing. But if you set a debug listener on an\n   * idle stream, it won't start executing (not until the first normal listener\n   * is added).\n   *\n   * As the name indicates, we don't recommend using this method to build app\n   * logic. In fact, in most cases the debug operator works just fine. Only use\n   * this one if you know what you're doing.\n   *\n   * @param {Listener<T>} listener\n   */\n  setDebugListener(listener: Partial<Listener<T>> | null | undefined) {\n    if (!listener) {\n      this._d = false;\n      this._dl = NO as InternalListener<T>;\n    } else {\n      this._d = true;\n      (listener as InternalListener<T>)._n = listener.next || noop;\n      (listener as InternalListener<T>)._e = listener.error || noop;\n      (listener as InternalListener<T>)._c = listener.complete || noop;\n      this._dl = listener as InternalListener<T>;\n    }\n  }\n}\n\nexport class MemoryStream<T> extends Stream<T> {\n  private _v?: T;\n  private _has?: boolean = false;\n  constructor(producer: InternalProducer<T>) {\n    super(producer);\n  }\n\n  _n(x: T) {\n    this._v = x;\n    this._has = true;\n    super._n(x);\n  }\n\n  _add(il: InternalListener<T>): void {\n    const ta = this._target;\n    if (ta) return ta._add(il);\n    const a = this._ils;\n    a.push(il);\n    if (a.length > 1) {\n      if (this._has) il._n(this._v!);\n      return;\n    }\n    if (this._stopID !== NO) {\n      if (this._has) il._n(this._v!);\n      clearTimeout(this._stopID);\n      this._stopID = NO;\n    } else if (this._has) il._n(this._v!); else {\n      const p = this._prod;\n      if (p !== NO) p._start(this);\n    }\n  }\n\n  _stopNow() {\n    this._has = false;\n    super._stopNow();\n  }\n\n  _x(): void {\n    this._has = false;\n    super._x();\n  }\n\n  map<U>(project: (t: T) => U): MemoryStream<U> {\n    return this._map(project) as MemoryStream<U>;\n  }\n\n  mapTo<U>(projectedValue: U): MemoryStream<U> {\n    return super.mapTo(projectedValue) as MemoryStream<U>;\n  }\n\n  take(amount: number): MemoryStream<T> {\n    return super.take(amount) as MemoryStream<T>;\n  }\n\n  endWhen(other: Stream<any>): MemoryStream<T> {\n    return super.endWhen(other) as MemoryStream<T>;\n  }\n\n  replaceError(replace: (err: any) => Stream<T>): MemoryStream<T> {\n    return super.replaceError(replace) as MemoryStream<T>;\n  }\n\n  remember(): MemoryStream<T> {\n    return this;\n  }\n\n  debug(): MemoryStream<T>;\n  debug(labelOrSpy: string): MemoryStream<T>;\n  debug(labelOrSpy: (t: T) => any): MemoryStream<T>;\n  debug(labelOrSpy?: string | ((t: T) => any) | undefined): MemoryStream<T> {\n    return super.debug(labelOrSpy as any) as MemoryStream<T>;\n  }\n}\n\nexport { NO, NO_IL };\nconst xs = Stream;\ntype xs<T> = Stream<T>;\nexport default xs;\n"]} |
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