hpaste-1.2.0: src/Hpaste/Types/Newtypes.hs

{-# OPTIONS -Wall #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}

-- | Newtypes; foreign keys and such.

module Hpaste.Types.Newtypes
       (PasteId(..)
       ,ChannelId(..)
       ,LanguageId(..)
       ,ReportId(..))
       where

import Database.PostgreSQL.Simple
import Database.PostgreSQL.Simple.FromField
import Database.PostgreSQL.Simple.ToField

newtype PasteId = PasteId Integer
  deriving (Eq,FromField,ToField,Ord)

instance Show PasteId where show (PasteId pid) = show pid

newtype ReportId = ReportId Integer
  deriving (Integral,Real,Num,Ord,Eq,Enum,FromField,ToField)

instance Show ReportId where show (ReportId pid) = show pid

newtype ChannelId = ChannelId Integer
  deriving (Integral,Real,Num,Ord,Eq,Enum,FromField,ToField)

instance Show ChannelId where show (ChannelId pid) = show pid

newtype LanguageId = LanguageId Integer
  deriving (Integral,Real,Num,Ord,Eq,Enum,FromField,ToField)

instance Show LanguageId where show (LanguageId pid) = show pid