prepack/lib/evaluators/SuperCall.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 = SuperCall;

var _environment = require("../environment.js");

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

var _index2 = require("../methods/index.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 GetSuperConstructor(realm) {
  // 1. Let envRec be GetThisEnvironment( ).
  let envRec = _singletons.Environment.GetThisEnvironment(realm); // 2. Assert: envRec is a function Environment Record.


  (0, _invariant.default)(envRec instanceof _environment.FunctionEnvironmentRecord); // 3. Let activeFunction be envRec.[[FunctionObject]].

  let activeFunction = envRec.$FunctionObject; // 4. Let superConstructor be activeFunction.[[GetPrototypeOf]]().

  let superConstructor = activeFunction.$GetPrototypeOf(); // 5. ReturnIfAbrupt(superConstructor).
  // 6. If IsConstructor(superConstructor) is false, throw a TypeError exception.

  if (!(0, _index2.IsConstructor)(realm, superConstructor)) {
    throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError, "super called outside of constructor");
  }

  (0, _invariant.default)(superConstructor instanceof _index.ObjectValue); // 7. Return superConstructor.

  return superConstructor;
} // ECMA262 12.3.5.1


function SuperCall(Arguments, strictCode, env, realm) {
  // 1. Let newTarget be GetNewTarget().
  let newTarget = (0, _index2.GetNewTarget)(realm); // 2. If newTarget is undefined, throw a ReferenceError exception.

  if (newTarget instanceof _index.UndefinedValue) {
    throw realm.createErrorThrowCompletion(realm.intrinsics.ReferenceError, "newTarget is undefined");
  } // 3. Let func be GetSuperConstructor().


  let func = GetSuperConstructor(realm); // 4. ReturnIfAbrupt(func).
  // 5. Let argList be ArgumentListEvaluation of Arguments.

  let argList = (0, _index2.ArgumentListEvaluation)(realm, strictCode, env, Arguments); // 6. ReturnIfAbrupt(argList).
  // 7. Let result be Construct(func, argList, newTarget).

  let result = (0, _index2.Construct)(realm, func, argList, newTarget).throwIfNotConcreteObject(); // 8. ReturnIfAbrupt(result).
  // 9. Let thisER be GetThisEnvironment( ).

  let thisER = _singletons.Environment.GetThisEnvironment(realm); // 10. Return thisER.BindThisValue(result).


  return thisER.BindThisValue(result);
}
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