var constants = {
  MAX_LENGTH: 1024 * 64,
  // Digits
  CHAR_0: '0',
  /* 0 */
  CHAR_9: '9',
  /* 9 */

  // Alphabet chars.
  CHAR_UPPERCASE_A: 'A',
  /* A */
  CHAR_LOWERCASE_A: 'a',
  /* a */
  CHAR_UPPERCASE_Z: 'Z',
  /* Z */
  CHAR_LOWERCASE_Z: 'z',
  /* z */

  CHAR_LEFT_PARENTHESES: '(',
  /* ( */
  CHAR_RIGHT_PARENTHESES: ')',
  /* ) */

  CHAR_ASTERISK: '*',
  /* * */

  // Non-alphabetic chars.
  CHAR_AMPERSAND: '&',
  /* & */
  CHAR_AT: '@',
  /* @ */
  CHAR_BACKSLASH: '\\',
  /* \ */
  CHAR_BACKTICK: '`',
  /* ` */
  CHAR_CARRIAGE_RETURN: '\r',
  /* \r */
  CHAR_CIRCUMFLEX_ACCENT: '^',
  /* ^ */
  CHAR_COLON: ':',
  /* : */
  CHAR_COMMA: ',',
  /* , */
  CHAR_DOLLAR: '$',
  /* . */
  CHAR_DOT: '.',
  /* . */
  CHAR_DOUBLE_QUOTE: '"',
  /* " */
  CHAR_EQUAL: '=',
  /* = */
  CHAR_EXCLAMATION_MARK: '!',
  /* ! */
  CHAR_FORM_FEED: '\f',
  /* \f */
  CHAR_FORWARD_SLASH: '/',
  /* / */
  CHAR_HASH: '#',
  /* # */
  CHAR_HYPHEN_MINUS: '-',
  /* - */
  CHAR_LEFT_ANGLE_BRACKET: '<',
  /* < */
  CHAR_LEFT_CURLY_BRACE: '{',
  /* { */
  CHAR_LEFT_SQUARE_BRACKET: '[',
  /* [ */
  CHAR_LINE_FEED: '\n',
  /* \n */
  CHAR_NO_BREAK_SPACE: '\u00A0',
  /* \u00A0 */
  CHAR_PERCENT: '%',
  /* % */
  CHAR_PLUS: '+',
  /* + */
  CHAR_QUESTION_MARK: '?',
  /* ? */
  CHAR_RIGHT_ANGLE_BRACKET: '>',
  /* > */
  CHAR_RIGHT_CURLY_BRACE: '}',
  /* } */
  CHAR_RIGHT_SQUARE_BRACKET: ']',
  /* ] */
  CHAR_SEMICOLON: ';',
  /* ; */
  CHAR_SINGLE_QUOTE: '\'',
  /* ' */
  CHAR_SPACE: ' ',
  /*   */
  CHAR_TAB: '\t',
  /* \t */
  CHAR_UNDERSCORE: '_',
  /* _ */
  CHAR_VERTICAL_LINE: '|',
  /* | */
  CHAR_ZERO_WIDTH_NOBREAK_SPACE: '\uFEFF' /* \uFEFF */
};

export { constants };
