/**
   * Copyright (C) 2016 Michael Kourlas
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  /**
   * @private
   */
  export declare function isString(val: any): val is string;
  /**
   * @private
   */
  export declare function isNumber(val: any): val is number;
  /**
   * @private
   */
  export declare function isBoolean(val: any): val is boolean;
  /**
   * @private
   */
  export declare function isUndefined(val: any): val is undefined;
  /**
   * @private
   */
  export declare function isObject(val: any): val is object;
  /**
   * @private
   */
  export declare function isArray(val: any): val is any[];
  /**
   * @private
   */
  export declare function isInteger(value: any): boolean;
  /**
   * Retrieve the Unicode code point at the specified index in the specified
   * string.
   *
   * @param str The string from which to retrieve the Unicode code point.
   * @param index The specified index.
   *
   * @returns The Unicode code point at the specified position.
   *
   * @private
   */
  export declare function getCodePoint(str: string, index: number): number;