hasql/library/Hasql/Private/Prelude.hs
2017-11-26 11:24:40 +03:00

136 lines
3.6 KiB
Haskell

module Hasql.Private.Prelude
(
module Exports,
LazyByteString,
ByteStringBuilder,
LazyText,
TextBuilder,
bug,
bottom,
forMToZero_,
forMFromZero_,
strictCons,
mapLeft,
)
where
-- base-prelude
-------------------------
import BasePrelude as Exports hiding (assert, left, right, isLeft, isRight, fromLeft, fromRight, error, (<>), First(..), Last(..), new)
-- transformers
-------------------------
import Control.Monad.IO.Class as Exports
import Control.Monad.Trans.Class as Exports
import Control.Monad.Trans.Cont as Exports hiding (shift, callCC)
import Control.Monad.Trans.Except as Exports (ExceptT(ExceptT), Except, except, runExcept, runExceptT, mapExcept, mapExceptT, withExcept, withExceptT, throwE, catchE)
import Control.Monad.Trans.Maybe as Exports
import Control.Monad.Trans.Reader as Exports (Reader, runReader, mapReader, withReader, ReaderT(ReaderT), runReaderT, mapReaderT, withReaderT)
import Control.Monad.Trans.State.Strict as Exports (State, runState, evalState, execState, mapState, withState, StateT(StateT), runStateT, evalStateT, execStateT, mapStateT, withStateT)
import Control.Monad.Trans.Writer.Strict as Exports (Writer, runWriter, execWriter, mapWriter, WriterT(..), execWriterT, mapWriterT)
import Data.Functor.Compose as Exports
import Data.Functor.Identity as Exports
-- mtl
-------------------------
import Control.Monad.Error.Class as Exports (MonadError (..))
-- data-default-class
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import Data.Default.Class as Exports
-- profunctors
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import Data.Profunctor.Unsafe as Exports
-- contravariant
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import Data.Functor.Contravariant as Exports
import Data.Functor.Contravariant.Divisible as Exports
-- contravariant-extras
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import Contravariant.Extras as Exports
-- semigroups
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import Data.Semigroup as Exports
-- hashable
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import Data.Hashable as Exports (Hashable(..))
-- text
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import Data.Text as Exports (Text)
-- bytestring
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import Data.ByteString as Exports (ByteString)
-- vector
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import Data.Vector as Exports (Vector)
-- dlist
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import Data.DList as Exports (DList)
-- placeholders
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import Development.Placeholders as Exports
-- loch-th
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import Debug.Trace.LocationTH as Exports
-- custom
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import qualified Debug.Trace.LocationTH
import qualified Data.Text.Lazy
import qualified Data.Text.Lazy.Builder
import qualified Data.ByteString.Lazy
import qualified Data.ByteString.Builder
type LazyByteString =
Data.ByteString.Lazy.ByteString
type ByteStringBuilder =
Data.ByteString.Builder.Builder
type LazyText =
Data.Text.Lazy.Text
type TextBuilder =
Data.Text.Lazy.Builder.Builder
bug =
[e| $(Debug.Trace.LocationTH.failure) . (msg <>) |]
where
msg = "A \"hasql\" package bug: " :: String
bottom =
[e| $bug "Bottom evaluated" |]
{-# INLINE forMToZero_ #-}
forMToZero_ :: Applicative m => Int -> (Int -> m a) -> m ()
forMToZero_ !startN f =
($ pred startN) $ fix $ \loop !n -> if n >= 0 then f n *> loop (pred n) else pure ()
{-# INLINE forMFromZero_ #-}
forMFromZero_ :: Applicative m => Int -> (Int -> m a) -> m ()
forMFromZero_ !endN f =
($ 0) $ fix $ \loop !n -> if n < endN then f n *> loop (succ n) else pure ()
{-# INLINE strictCons #-}
strictCons :: a -> [a] -> [a]
strictCons !a b =
let !c = a : b in c
{-# INLINE mapLeft #-}
mapLeft :: (a -> c) -> Either a b -> Either c b
mapLeft f =
either (Left . f) Right