Library with some functions for reading special tokens.
This library is included for backward compatibility. You should use the library ReadNumeric which provides a better interface for these functions.
Author: Michael Hanus
Version: January 2000
| readNat
                  ::  String -> IntRead a natural number in a string. | 
| readInt
                  ::  String -> IntRead a (possibly negative) integer in a string. | 
| readHex
                  ::  String -> IntRead a hexadecimal number in a string. | 
| 
                       Read a natural number in a string. The string might contain leadings blanks and the the number is read up to the first non-digit. | 
| 
                       Read a (possibly negative) integer in a string. The string might contain leadings blanks and the the integer is read up to the first non-digit. | 
| 
                       Read a hexadecimal number in a string. The string might contain leadings blanks and the the integer is read up to the first non-heaxdecimal digit. |