postgrest/src/Show.hs

{-# LANGUAGE Trustworthy #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE TypeSynonymInstances #-}
{-# LANGUAGE ExtendedDefaultRules #-}

module Show (
  Print(..),
  putText,
  putLText,
) where

import qualified Base
import Data.Function ((.))

import Control.Monad.IO.Class (MonadIO, liftIO)
import qualified Data.ByteString.Char8 as BS
import qualified Data.ByteString.Lazy.Char8 as BL

import qualified Data.Text as T
import qualified Data.Text.IO as T

import qualified Data.Text.Lazy as TL
import qualified Data.Text.Lazy.IO as TL


class Print a where
  putStr :: MonadIO m => a -> m ()
  putStrLn :: MonadIO m => a -> m ()

instance Print T.Text where
  putStr = liftIO . T.putStr
  putStrLn = liftIO . T.putStrLn

instance Print TL.Text where
  putStr = liftIO . TL.putStr
  putStrLn = liftIO . TL.putStrLn

instance Print BS.ByteString where
  putStr = liftIO . BS.putStr
  putStrLn = liftIO . BS.putStrLn

instance Print BL.ByteString where
  putStr = liftIO . BL.putStr
  putStrLn = liftIO . BL.putStrLn

instance Print [Base.Char] where
  putStr = liftIO . Base.putStr
  putStrLn = liftIO . Base.putStrLn

-- For forcing type inference
putText :: MonadIO m => T.Text -> m ()
putText = putStrLn
{-# SPECIALIZE putText :: T.Text -> Base.IO () #-}

putLText :: MonadIO m => TL.Text -> m ()
putLText = putStrLn
{-# SPECIALIZE putLText :: TL.Text -> Base.IO () #-}