deriving Read added to Time datatypes

Time.curry

@@ -2,7 +2,7 @@
 --- Library for handling date and time information.
 ---
 --- @author Michael Hanus
---- @version April 2007
+--- @version January 2018
 --- @category general
 ------------------------------------------------------------------------------
 
@@ -17,14 +17,14 @@ module Time(ClockTime,
 
 --- ClockTime represents a clock time in some internal representation.
 data ClockTime = CTime Int
- deriving (Eq, Ord, Show)
+ deriving (Eq, Ord, Show, Read)
 
 --- A calendar time is presented in the following form:
 --- (CalendarTime year month day hour minute second timezone)
 --- where timezone is an integer representing the timezone as a difference
 --- to UTC time in seconds.
 data CalendarTime = CalendarTime Int Int Int Int Int Int Int
- deriving (Eq, Ord, Show)
+ deriving (Eq, Ord, Show, Read)
 
 --- The year of a calendar time.
 ctYear :: CalendarTime -> Int