lodash/internal/createCtorWrapper.js

import baseCreate from './baseCreate';
import isObject from '../lang/isObject';

/**
 * Creates a function that produces an instance of `Ctor` regardless of
 * whether it was invoked as part of a `new` expression or by `call` or `apply`.
 *
 * @private
 * @param {Function} Ctor The constructor to wrap.
 * @returns {Function} Returns the new wrapped function.
 */
function createCtorWrapper(Ctor) {
  return function() {
    var thisBinding = baseCreate(Ctor.prototype),
        result = Ctor.apply(thisBinding, arguments);

    // Mimic the constructor's `return` behavior.
    // See https://es5.github.io/#x13.2.2 for more details.
    return isObject(result) ? result : thisBinding;
  };
}

export default createCtorWrapper;