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
});

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

var _babelTypes = require("babel-types");

var t = _interopRequireWildcard(_babelTypes);

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

var _invariant2 = _interopRequireDefault(_invariant);

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)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

/* Non built-in ECMAScript function objects with source code */
/**
 * 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.
 */

class ECMAScriptSourceFunctionValue extends _index.ECMAScriptFunctionValue {
  constructor(realm, intrinsicName) {
    super(realm, intrinsicName);
  }

  // Override.
  getName() {
    const uniqueTag = this.$ECMAScriptCode.uniqueOrderedTag;
    // Should only be called after the function is initialized.
    (0, _invariant2.default)(uniqueTag);
    return this.__originalName ? this.__originalName : `f#${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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