prepack/lib/intrinsics/ecma262/ArrayBuffer.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 _singletons = require("../../singletons.js");

var _arraybuffer = require("../../methods/arraybuffer.js");

/**
 * 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 24.1.2.1
  let func = new _index.NativeFunctionValue(realm, "ArrayBuffer", "ArrayBuffer", 1, (context, [length], argCount, NewTarget) => {
    // 1. If NewTarget is undefined, throw a TypeError exception.
    if (!NewTarget) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    } // 2. Let byteLength be ToIndex(numberLength).


    let byteLength = _singletons.To.ToIndexPartial(realm, length); // 3. Return ? AllocateArrayBuffer(NewTarget, byteLength).


    return (0, _arraybuffer.AllocateArrayBuffer)(realm, NewTarget, byteLength);
  }); // ECMA262 24.1.3.1

  func.defineNativeMethod("isView", 1, (context, [_arg]) => {
    let arg = _arg; // 1. If Type(arg) is not Object, return false.

    if (!arg.mightBeObject()) return realm.intrinsics.false; // 2. If arg has a [[ViewedArrayBuffer]] internal slot, return true.

    arg = arg.throwIfNotConcreteObject();
    if ("$ViewedArrayBuffer" in arg) return realm.intrinsics.true; // 3. Return false.

    return realm.intrinsics.false;
  }); // ECMA262 24.1.3.3

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