Function ReductionPromiseArray

src/web/util/bluebird.js:3186–3213

(promises, fn, accum, _each)

var tryCatch = util.tryCatch;
var errorObj = util.errorObj;
function ReductionPromiseArray(promises, fn, accum, _each) {
    this.constructor$(promises);
    this._promise._captureStackTrace();
    this._preservedValues = _each === INTERNAL ? [] : null;
    this._zerothIsAccum = (accum === undefined);
    this._gotAccum = false;
    this._reducingIndex = (this._zerothIsAccum ? 1 : 0);
    this._valuesPhase = undefined;
    var maybePromise = tryConvertToPromise(accum, this._promise);
    var rejected = false;
    var isPromise = maybePromise instanceof Promise;
    if (isPromise) {
        maybePromise = maybePromise._target();
        if (maybePromise._isPending()) {
            maybePromise._proxyPromiseArray(this, -1);
        } else if (maybePromise._isFulfilled()) {
            accum = maybePromise._value();
            this._gotAccum = true;
        } else {
            this._reject(maybePromise._reason());
            rejected = true;
        }
    }
    if (!(isPromise || this._zerothIsAccum)) this._gotAccum = true;
    this._callback = fn;
    this._accum = accum;
    if (!rejected) this._init$(undefined, -5);
}
util.inherits(ReductionPromiseArray, PromiseArray);

ReductionPromiseArray.prototype._init = function () {};