prepack/lib/evaluators/ClassExpression.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("../methods/index.js");

var _ClassDeclaration = require("./ClassDeclaration");

var _singletons = require("../singletons.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 */
// ECMA262 14.5.16
function _default(ast, strictCode, env, realm) {
  // 1. If BindingIdentifieropt is not present, let className be undefined.
  let className; // 2. Else, let className be StringValue of BindingIdentifier.

  if (ast.id != null) {
    className = ast.id.name;
  } // 3. Let value be the result of ClassDefinitionEvaluation of ClassTail with argument className.


  let value = (0, _ClassDeclaration.ClassDefinitionEvaluation)(realm, ast, className, strictCode, env); // 4. ReturnIfAbrupt(value).
  // 5. If className is not undefined, then

  if (className !== undefined) {
    // a. Let hasNameProperty be HasOwnProperty(value, "name").
    let hasNameProperty = (0, _index.HasOwnProperty)(realm, value, "name"); // b. ReturnIfAbrupt(hasNameProperty).
    // c. If hasNameProperty is false, then

    if (!hasNameProperty) {
      // i. Perform SetFunctionName(value, className).
      _singletons.Functions.SetFunctionName(realm, value, className);
    }
  } // 6. Return NormalCompletion(value).


  return value;
}
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