@reactivex/ix-es5-esm/asynciterable/merge.js

The Interactive Extensions for JavaScript

import { __asyncGenerator, __await, __extends, __generator, __read, __spreadArray } from "tslib";
import { AsyncIterableX } from './asynciterablex.js';
import { wrapWithAbort } from './operators/withabort.js';
import { throwIfAborted } from '../aborterror.js';
import { safeRace } from '../util/safeRace.js';
// eslint-disable-next-line @typescript-eslint/no-empty-function
var NEVER_PROMISE = new Promise(function () { });
function wrapPromiseWithIndex(promise, index) {
    return promise
        .then(function (_a) {
        var value = _a.value, done = _a.done;
        return ({ value: value, done: done, index: index });
    })
        .catch(function (error) { return ({ error: error, index: index }); });
}
/** @ignore */
var MergeAsyncIterable = /** @class */ (function (_super) {
    __extends(MergeAsyncIterable, _super);
    function MergeAsyncIterable(source) {
        var _this = _super.call(this) || this;
        _this._source = source;
        return _this;
    }
    MergeAsyncIterable.prototype[Symbol.asyncIterator] = function (signal) {
        return __asyncGenerator(this, arguments, function _a() {
            var length, iterators, nexts, active, i, iterator, next, iterator$;
            return __generator(this, function (_b) {
                switch (_b.label) {
                    case 0:
                        throwIfAborted(signal);
                        length = this._source.length;
                        iterators = new Array(length);
                        nexts = new Array(length);
                        active = length;
                        for (i = 0; i < length; i++) {
                            iterator = wrapWithAbort(this._source[i], signal)[Symbol.asyncIterator]();
                            iterators[i] = iterator;
                            nexts[i] = wrapPromiseWithIndex(iterator.next(), i);
                        }
                        _b.label = 1;
                    case 1:
                        if (!(active > 0)) return [3 /*break*/, 8];
                        return [4 /*yield*/, __await(safeRace(nexts))];
                    case 2:
                        next = _b.sent();
                        if (!next.hasOwnProperty('error')) return [3 /*break*/, 3];
                        throw next.error;
                    case 3:
                        if (!next.done) return [3 /*break*/, 4];
                        nexts[next.index] = NEVER_PROMISE;
                        active--;
                        return [3 /*break*/, 7];
                    case 4:
                        iterator$ = iterators[next.index];
                        nexts[next.index] = wrapPromiseWithIndex(iterator$.next(), next.index);
                        return [4 /*yield*/, __await(next.value)];
                    case 5: return [4 /*yield*/, _b.sent()];
                    case 6:
                        _b.sent();
                        _b.label = 7;
                    case 7: return [3 /*break*/, 1];
                    case 8: return [2 /*return*/];
                }
            });
        });
    };
    return MergeAsyncIterable;
}(AsyncIterableX));
export { MergeAsyncIterable };
export function merge(source) {
    var args = [];
    for (var _i = 1; _i < arguments.length; _i++) {
        args[_i - 1] = arguments[_i];
    }
    return new MergeAsyncIterable(__spreadArray([source], __read(args), false));
}

//# sourceMappingURL=merge.js.map