prepack/lib/intrinsics/ecma262/Promise.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 _completions = require("../../completions.js");

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

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

var _iterator = require("../../methods/iterator.js");

var _singletons = require("../../singletons.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) {
  // ECMA262 25.4.3.1
  let func = new _index.NativeFunctionValue(realm, "Promise", "Promise", 1, (context, [executor], argCount, NewTarget) => {
    // 1. If NewTarget is undefined, throw a TypeError exception.
    if (!NewTarget) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    } // 2. If IsCallable(executor) is false, throw a TypeError exception.


    if (!(0, _index2.IsCallable)(realm, executor)) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    } // 3. Let promise be ? OrdinaryCreateFromConstructor(NewTarget, "%PromisePrototype%", « [[PromiseState]], [[PromiseResult]], [[PromiseFulfillReactions]], [[PromiseRejectReactions]], [[PromiseIsHandled]] »).


    let promise = _singletons.Create.OrdinaryCreateFromConstructor(realm, NewTarget, "PromisePrototype", {
      $PromiseState: undefined,
      $PromiseResult: undefined,
      $PromiseFulfillReactions: undefined,
      $PromiseRejectReactions: undefined,
      $PromiseIsHandled: undefined
    }); // 4. Set promise's [[PromiseState]] internal slot to "pending".


    promise.$PromiseState = "pending"; // 5. Set promise's [[PromiseFulfillReactions]] internal slot to a new empty List.

    promise.$PromiseFulfillReactions = []; // 6. Set promise's [[PromiseRejectReactions]] internal slot to a new empty List.

    promise.$PromiseRejectReactions = []; // 7. Set promise's [[PromiseIsHandled]] internal slot to false.

    promise.$PromiseIsHandled = false; // 8. Let resolvingFunctions be CreateResolvingFunctions(promise).

    let resolvingFunctions = (0, _promise.CreateResolvingFunctions)(realm, promise); // 9. Let completion be Call(executor, undefined, « resolvingFunctions.[[Resolve]], resolvingFunctions.[[Reject]] »).

    let completion;

    try {
      completion = (0, _index2.Call)(realm, executor, realm.intrinsics.undefined, [resolvingFunctions.resolve, resolvingFunctions.reject]);
    } catch (err) {
      if (err instanceof _completions.AbruptCompletion) {
        completion = err;
      } else {
        throw err;
      }
    } // 10. If completion is an abrupt completion, then


    if (completion instanceof _completions.AbruptCompletion) {
      // a. Perform ? Call(resolvingFunctions.[[Reject]], undefined, « completion.[[Value]] »).
      (0, _index2.Call)(realm, resolvingFunctions.reject, realm.intrinsics.undefined, [completion.value]);
    } // 11. Return promise.


    return promise;
  }); // ECMA262 25.4.4.1

  func.defineNativeMethod("all", 1, (context, [iterable]) => {
    // 1. Let C be the this value.
    let C = context.throwIfNotConcrete(); // 2. If Type(C) is not Object, throw a TypeError exception.

    if (!(C instanceof _index.ObjectValue)) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    } // 3. Let promiseCapability be ? NewPromiseCapability(C).


    let promiseCapability = (0, _promise.NewPromiseCapability)(realm, C); // 4. Let iterator be GetIterator(iterable).

    let iterator;

    try {
      iterator = (0, _index2.GetIterator)(realm, iterable);
    } catch (e) {
      if (e instanceof _completions.AbruptCompletion) {
        // 5. IfAbruptRejectPromise(iterator, promiseCapability).
        (0, _index2.Call)(realm, promiseCapability.reject, realm.intrinsics.undefined, [e.value]);
        return promiseCapability.promise;
      } else throw e;
    } // 6. Let iteratorRecord be Record {[[Iterator]]: iterator, [[Done]]: false}.


    let iteratorRecord = {
      $Iterator: iterator,
      $Done: false
    }; // 7. Let result be PerformPromiseAll(iteratorRecord, C, promiseCapability).

    let result;

    try {
      (0, _invariant.default)(C instanceof _index.FunctionValue);
      result = (0, _promise.PerformPromiseAll)(realm, iteratorRecord, C, promiseCapability);
    } catch (e) {
      // 8. If result is an abrupt completion, then
      if (e instanceof _completions.AbruptCompletion) {
        // a. If iteratorRecord.[[Done]] is false, let result be IteratorClose(iterator, result).
        if (iteratorRecord.$Done === false) {
          try {
            result = (0, _iterator.IteratorClose)(realm, iterator, e).value;
          } catch (resultCompletion) {
            if (resultCompletion instanceof _completions.AbruptCompletion) {
              result = resultCompletion.value;
            } else throw resultCompletion;
          }
        } else {
          result = e.value;
        } // b. IfAbruptRejectPromise(result, promiseCapability).


        (0, _index2.Call)(realm, promiseCapability.reject, realm.intrinsics.undefined, [result]);
        return promiseCapability.promise;
      } else throw e;
    } // 9. Return Completion(result).


    return result;
  }); // ECMA262 25.4.4.3

  func.defineNativeMethod("race", 1, (context, [iterable]) => {
    // 1. Let C be the this value.
    let C = context.throwIfNotConcrete(); // 2. If Type(C) is not Object, throw a TypeError exception.

    if (!(C instanceof _index.ObjectValue)) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    } // 3. Let promiseCapability be ? NewPromiseCapability(C).


    let promiseCapability = (0, _promise.NewPromiseCapability)(realm, C); // 4. Let iterator be GetIterator(iterable).

    let iterator;

    try {
      iterator = (0, _index2.GetIterator)(realm, iterable);
    } catch (e) {
      if (e instanceof _completions.AbruptCompletion) {
        // 5. IfAbruptRejectPromise(iterator, promiseCapability).
        (0, _index2.Call)(realm, promiseCapability.reject, realm.intrinsics.undefined, [e.value]);
        return promiseCapability.promise;
      } else throw e;
    } // 6. Let iteratorRecord be Record {[[Iterator]]: iterator, [[Done]]: false}.


    let iteratorRecord = {
      $Iterator: iterator,
      $Done: false
    }; // 7. Let result be PerformPromiseRace(iteratorRecord, promiseCapability, C).

    let result;

    try {
      result = (0, _promise.PerformPromiseRace)(realm, iteratorRecord, promiseCapability, C);
    } catch (e) {
      // 8. If result is an abrupt completion, then
      if (e instanceof _completions.AbruptCompletion) {
        // a. If iteratorRecord.[[Done]] is false, let result be IteratorClose(iterator, result).
        if (iteratorRecord.$Done === false) {
          try {
            result = (0, _iterator.IteratorClose)(realm, iterator, e).value;
          } catch (resultCompletion) {
            if (resultCompletion instanceof _completions.AbruptCompletion) {
              result = resultCompletion.value;
            } else throw resultCompletion;
          }
        } else {
          result = e.value;
        } // b. IfAbruptRejectPromise(result, promiseCapability).


        (0, _index2.Call)(realm, promiseCapability.reject, realm.intrinsics.undefined, [result]);
        return promiseCapability.promise;
      } else throw e;
    } // 9. Return Completion(result).


    return result;
  }); // ECMA262 25.4.4.4

  func.defineNativeMethod("reject", 1, (context, [r]) => {
    // 1. Let C be the this value.
    let C = context.throwIfNotConcrete(); // 2. If Type(C) is not Object, throw a TypeError exception.

    if (!(C instanceof _index.ObjectValue)) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    } // 3. Let promiseCapability be ? NewPromiseCapability(C).


    let promiseCapability = (0, _promise.NewPromiseCapability)(realm, C); // 4. Perform ? Call(promiseCapability.[[Reject]], undefined, « r »).

    (0, _index2.Call)(realm, promiseCapability.reject, realm.intrinsics.undefined, [r]); // 5. Return promiseCapability.[[Promise]].

    return promiseCapability.promise;
  }); // ECMA262 25.4.4.5

  func.defineNativeMethod("resolve", 1, (context, [x]) => {
    // 1. Let C be the this value.
    let C = context.throwIfNotConcrete(); // 2. If Type(C) is not Object, throw a TypeError exception.

    if (!(C instanceof _index.ObjectValue)) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    } // 3. If IsPromise(x) is true, then


    if ((0, _index2.IsPromise)(realm, x)) {
      (0, _invariant.default)(x instanceof _index.ObjectValue); // a. Let xConstructor be ? Get(x, "constructor").

      let xConstructor = (0, _index2.Get)(realm, x, "constructor"); // b. If SameValue(xConstructor, C) is true, return x.

      if ((0, _index2.SameValuePartial)(realm, xConstructor, C)) return x;
    } // 4. Let promiseCapability be ? NewPromiseCapability(C).


    let promiseCapability = (0, _promise.NewPromiseCapability)(realm, C); // 5. Perform ? Call(promiseCapability.[[Resolve]], undefined, « x »).

    (0, _index2.Call)(realm, promiseCapability.resolve, realm.intrinsics.undefined, [x]); // 6. Return promiseCapability.[[Promise]].

    return promiseCapability.promise;
  }); // ECMA262 25.4.4.6

  func.defineNativeGetter(realm.intrinsics.SymbolSpecies, context => {
    // 1. Return the this value
    return context;
  });
  return func;
}
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