nested data types

nested.hs

data Company = Company {
  companyName :: Text
, departments :: [Department]
} deriving (Eq, Show)

data Department = Department {
  departmentName :: Text
, employees      :: [Employee]
} deriving (Eq, Show)

data Employee = Employee {
  employeeName   :: Text
, employeeStatus :: EmployeeStatus
, salary         :: Int
, bonus          :: Maybe Int
} deriving (Eq, Show)

-- | Note that this is an ADT with several constructors
data EmployeeStatus =
   Permanent
 | Temporary Int -- number of days
 deriving (Eq, Show)