"use strict";
var root_1 = require('../util/root');
function toPromise(PromiseCtor) {
    var _this = this;
    if (!PromiseCtor) {
        if (root_1.root.Rx && root_1.root.Rx.config && root_1.root.Rx.config.Promise) {
            PromiseCtor = root_1.root.Rx.config.Promise;
        }
        else if (root_1.root.Promise) {
            PromiseCtor = root_1.root.Promise;
        }
    }
    if (!PromiseCtor) {
        throw new Error('no Promise impl found');
    }
    return new PromiseCtor(function (resolve, reject) {
        var value;
        _this.subscribe(function (x) { return value = x; }, function (err) { return reject(err); }, function () { return resolve(value); });
    });
}
exports.toPromise = toPromise;
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