prepack/lib/intrinsics/ecma262/PromisePrototype.js

Execute a JS bundle, serialize global state and side effects to a snapshot that can be quickly restored.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = _default;

var _index = require("../../values/index.js");

var _index2 = require("../../methods/index.js");

var _promise = require("../../methods/promise.js");

var _invariant = _interopRequireDefault(require("../../invariant.js"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Copyright (c) 2017-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */

/*  strict-local */
function _default(realm, obj) {
  // ECMA262 25.4.5.1
  obj.defineNativeMethod("catch", 1, (context, [onRejected]) => {
    // 1. Let promise be the this value.
    let promise = context; // 2. Return ? Invoke(promise, "then", « undefined, onRejected »).

    return (0, _index2.Invoke)(realm, promise, "then", [realm.intrinsics.undefined, onRejected]);
  }); // ECMA262 25.4.5.3

  obj.defineNativeMethod("then", 2, (context, [onFulfilled, onRejected]) => {
    // 1. Let promise be the this value.
    let promise = context; // 2. If IsPromise(promise) is false, throw a TypeError exception.

    if (!(0, _index2.IsPromise)(realm, promise)) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    }

    (0, _invariant.default)(promise instanceof _index.ObjectValue); // 3. Let C be ? SpeciesConstructor(promise, %Promise%).

    let C = (0, _index2.SpeciesConstructor)(realm, promise, realm.intrinsics.Promise); // 4. Let resultCapability be ? NewPromiseCapability(C).

    let resultCapability = (0, _promise.NewPromiseCapability)(realm, C); // 5. Return PerformPromiseThen(promise, onFulfilled, onRejected, resultCapability).

    return (0, _promise.PerformPromiseThen)(realm, promise, onFulfilled, onRejected, resultCapability);
  }); // ECMA262 25.4.5.4 Promise.prototype [ @@toStringTag ]

  obj.defineNativeProperty(realm.intrinsics.SymbolToStringTag, new _index.StringValue(realm, "Promise"), {
    writable: false
  });
}
//# sourceMappingURL=PromisePrototype.js.map