prepack/lib/values/ECMAScriptSourceFunctionValue.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 = void 0;

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

var t = _interopRequireWildcard(require("@babel/types"));

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

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

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }

/**
 * 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.
 */

/* Non built-in ECMAScript function objects with source code */
class ECMAScriptSourceFunctionValue extends _index.ECMAScriptFunctionValue {
  constructor(realm, intrinsicName) {
    super(realm, intrinsicName);
  }

  initialize(params, body) {
    let node = body;
    this.getHash(); // Record the sequence number, reflecting when this function was initialized for the first time

    if (node.uniqueOrderedTag === undefined) node.uniqueOrderedTag = this.$Realm.functionBodyUniqueTagSeed++;
    this.$ECMAScriptCode = body;
    this.$FormalParameters = params;
  } // Override.


  getName() {
    const uniqueTag = this.$ECMAScriptCode.uniqueOrderedTag; // Should only be called after the function is initialized.

    (0, _invariant.default)(uniqueTag);
    return this.__originalName ? this.__originalName : `function#${uniqueTag}`;
  }

  hasDefaultLength() {
    let params = this.$FormalParameters;
    let expected = params.length;

    for (let i = 0; i < params.length; i++) {
      let param = params[i];

      if (t.isAssignmentPattern(param) || t.isRestElement(param)) {
        expected = i;
        break;
      }
    }

    return expected === this.getLength();
  }

}

exports.default = ECMAScriptSourceFunctionValue;
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