{-# LANGUAGE CPP, DeriveDataTypeable,
             DeriveGeneric, FlexibleInstances, DefaultSignatures,
             RankNTypes, RoleAnnotations, ScopedTypeVariables,
             MagicHash, KindSignatures, PolyKinds, TypeApplications, DataKinds,
             GADTs, UnboxedTuples, UnboxedSums, TypeInType,
             Trustworthy, DeriveFunctor #-}

{-# OPTIONS_GHC -fno-warn-inline-rule-shadowing #-}

-----------------------------------------------------------------------------
-- |
-- Module      :  Language.Haskell.Syntax
-- Copyright   :  (c) The University of Glasgow 2003
-- License     :  BSD-style (see the file libraries/base/LICENSE)
--
-- Maintainer  :  libraries@haskell.org
-- Stability   :  experimental
-- Portability :  portable
--
-- Abstract syntax definitions for Template Haskell.
--
-----------------------------------------------------------------------------

module Language.Haskell.TH.Syntax
    ( module Language.Haskell.TH.Syntax
      -- * Language extensions
    , module Language.Haskell.TH.LanguageExtensions
    , ForeignSrcLang(..)
    ) where

import Data.Data hiding (Fixity(..))
import Data.IORef
import System.IO.Unsafe ( unsafePerformIO )
import GHC.IO.Unsafe    ( unsafeDupableInterleaveIO )
import Control.Monad (liftM)
import Control.Monad.IO.Class (MonadIO (..))
import Control.Monad.Fix (MonadFix (..))
import Control.Applicative (liftA2)
import Control.Exception (BlockedIndefinitelyOnMVar (..), catch, throwIO)
import Control.Exception.Base (FixIOException (..))
import Control.Concurrent.MVar (newEmptyMVar, readMVar, putMVar)
import System.IO        ( hPutStrLn, stderr )
import Data.Char        ( isAlpha, isAlphaNum, isUpper, ord )
import Data.Int
import Data.List.NonEmpty ( NonEmpty(..) )
import Data.Void        ( Void, absurd )
import Data.Word
import Data.Ratio
import GHC.CString      ( unpackCString# )
import GHC.Generics     ( Generic )
import GHC.Types        ( Int(..), Word(..), Char(..), Double(..), Float(..),
                          TYPE, RuntimeRep(..) )
import GHC.Prim         ( Int#, Word#, Char#, Double#, Float#, Addr# )
import GHC.Ptr          ( Ptr, plusPtr )
import GHC.Lexeme       ( startsVarSym, startsVarId )
import GHC.ForeignSrcLang.Type
import Language.Haskell.TH.LanguageExtensions
import Numeric.Natural
import Prelude
import Foreign.ForeignPtr
import Foreign.C.String
import Foreign.C.Types

#if __GLASGOW_HASKELL__ >= 901
import GHC.Types ( Levity(..) )
#endif

-----------------------------------------------------
--
--              The Quasi class
--
-----------------------------------------------------

class (MonadIO m, MonadFail m) => Quasi m where
  qNewName :: String -> m Name
        -- ^ Fresh names

        -- Error reporting and recovery
  qReport  :: Bool -> String -> m ()    -- ^ Report an error (True) or warning (False)
                                        -- ...but carry on; use 'fail' to stop
  qRecover :: m a -- ^ the error handler
           -> m a -- ^ action which may fail
           -> m a               -- ^ Recover from the monadic 'fail'

        -- Inspect the type-checker's environment
  qLookupName :: Bool -> String -> m (Maybe Name)
       -- True <=> type namespace, False <=> value namespace
  qReify          :: Name -> m Info
  qReifyFixity    :: Name -> m (Maybe Fixity)
  qReifyType      :: Name -> m Type
  qReifyInstances :: Name -> [Type] -> m [Dec]
       -- Is (n tys) an instance?
       -- Returns list of matching instance Decs
       --    (with empty sub-Decs)
       -- Works for classes and type functions
  qReifyRoles         :: Name -> m [Role]
  qReifyAnnotations   :: Data a => AnnLookup -> m [a]
  qReifyModule        :: Module -> m ModuleInfo
  qReifyConStrictness :: Name -> m [DecidedStrictness]

  qLocation :: m Loc

  qRunIO :: IO a -> m a
  qRunIO = forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO
  -- ^ Input/output (dangerous)

  qAddDependentFile :: FilePath -> m ()

  qAddTempFile :: String -> m FilePath

  qAddTopDecls :: [Dec] -> m ()

  qAddForeignFilePath :: ForeignSrcLang -> String -> m ()

  qAddModFinalizer :: Q () -> m ()

  qAddCorePlugin :: String -> m ()

  qGetQ :: Typeable a => m (Maybe a)

  qPutQ :: Typeable a => a -> m ()

  qIsExtEnabled :: Extension -> m Bool
  qExtsEnabled :: m [Extension]

  qPutDoc :: DocLoc -> String -> m ()
  qGetDoc :: DocLoc -> m (Maybe String)

-----------------------------------------------------
--      The IO instance of Quasi
--
--  This instance is used only when running a Q
--  computation in the IO monad, usually just to
--  print the result.  There is no interesting
--  type environment, so reification isn't going to
--  work.
--
-----------------------------------------------------

instance Quasi IO where
  qNewName :: String -> IO Name
qNewName = String -> IO Name
newNameIO

  qReport :: Bool -> String -> IO ()
qReport Bool
True  String
msg = Handle -> String -> IO ()
hPutStrLn Handle
stderr (String
"Template Haskell error: " forall a. [a] -> [a] -> [a]
++ String
msg)
  qReport Bool
False String
msg = Handle -> String -> IO ()
hPutStrLn Handle
stderr (String
"Template Haskell error: " forall a. [a] -> [a] -> [a]
++ String
msg)

  qLookupName :: Bool -> String -> IO (Maybe Name)
qLookupName Bool
_ String
_       = forall a. String -> IO a
badIO String
"lookupName"
  qReify :: Name -> IO Info
qReify Name
_              = forall a. String -> IO a
badIO String
"reify"
  qReifyFixity :: Name -> IO (Maybe Fixity)
qReifyFixity Name
_        = forall a. String -> IO a
badIO String
"reifyFixity"
  qReifyType :: Name -> IO Type
qReifyType Name
_          = forall a. String -> IO a
badIO String
"reifyFixity"
  qReifyInstances :: Name -> [Type] -> IO [Dec]
qReifyInstances Name
_ [Type]
_   = forall a. String -> IO a
badIO String
"reifyInstances"
  qReifyRoles :: Name -> IO [Role]
qReifyRoles Name
_         = forall a. String -> IO a
badIO String
"reifyRoles"
  qReifyAnnotations :: forall a. Data a => AnnLookup -> IO [a]
qReifyAnnotations AnnLookup
_   = forall a. String -> IO a
badIO String
"reifyAnnotations"
  qReifyModule :: Module -> IO ModuleInfo
qReifyModule Module
_        = forall a. String -> IO a
badIO String
"reifyModule"
  qReifyConStrictness :: Name -> IO [DecidedStrictness]
qReifyConStrictness Name
_ = forall a. String -> IO a
badIO String
"reifyConStrictness"
  qLocation :: IO Loc
qLocation             = forall a. String -> IO a
badIO String
"currentLocation"
  qRecover :: forall a. IO a -> IO a -> IO a
qRecover IO a
_ IO a
_          = forall a. String -> IO a
badIO String
"recover" -- Maybe we could fix this?
  qAddDependentFile :: String -> IO ()
qAddDependentFile String
_   = forall a. String -> IO a
badIO String
"addDependentFile"
  qAddTempFile :: String -> IO String
qAddTempFile String
_        = forall a. String -> IO a
badIO String
"addTempFile"
  qAddTopDecls :: [Dec] -> IO ()
qAddTopDecls [Dec]
_        = forall a. String -> IO a
badIO String
"addTopDecls"
  qAddForeignFilePath :: ForeignSrcLang -> String -> IO ()
qAddForeignFilePath ForeignSrcLang
_ String
_ = forall a. String -> IO a
badIO String
"addForeignFilePath"
  qAddModFinalizer :: Q () -> IO ()
qAddModFinalizer Q ()
_    = forall a. String -> IO a
badIO String
"addModFinalizer"
  qAddCorePlugin :: String -> IO ()
qAddCorePlugin String
_      = forall a. String -> IO a
badIO String
"addCorePlugin"
  qGetQ :: forall a. Typeable a => IO (Maybe a)
qGetQ                 = forall a. String -> IO a
badIO String
"getQ"
  qPutQ :: forall a. Typeable a => a -> IO ()
qPutQ a
_               = forall a. String -> IO a
badIO String
"putQ"
  qIsExtEnabled :: Extension -> IO Bool
qIsExtEnabled Extension
_       = forall a. String -> IO a
badIO String
"isExtEnabled"
  qExtsEnabled :: IO [Extension]
qExtsEnabled          = forall a. String -> IO a
badIO String
"extsEnabled"
  qPutDoc :: DocLoc -> String -> IO ()
qPutDoc DocLoc
_ String
_           = forall a. String -> IO a
badIO String
"putDoc"
  qGetDoc :: DocLoc -> IO (Maybe String)
qGetDoc DocLoc
_             = forall a. String -> IO a
badIO String
"getDoc"

instance Quote IO where
  newName :: String -> IO Name
newName = String -> IO Name
newNameIO

newNameIO :: String -> IO Name
newNameIO :: String -> IO Name
newNameIO String
s = do { Uniq
n <- forall a b. IORef a -> (a -> (a, b)) -> IO b
atomicModifyIORef' IORef Uniq
counter (\Uniq
x -> (Uniq
x forall a. Num a => a -> a -> a
+ Uniq
1, Uniq
x))
                 ; forall (f :: * -> *) a. Applicative f => a -> f a
pure (String -> Uniq -> Name
mkNameU String
s Uniq
n) }

badIO :: String -> IO a
badIO :: forall a. String -> IO a
badIO String
op = do   { forall (m :: * -> *). Quasi m => Bool -> String -> m ()
qReport Bool
True (String
"Can't do `" forall a. [a] -> [a] -> [a]
++ String
op forall a. [a] -> [a] -> [a]
++ String
"' in the IO monad")
                ; forall (m :: * -> *) a. MonadFail m => String -> m a
fail String
"Template Haskell failure" }

-- Global variable to generate unique symbols
counter :: IORef Uniq
{-# NOINLINE counter #-}
counter :: IORef Uniq
counter = forall a. IO a -> a
unsafePerformIO (forall a. a -> IO (IORef a)
newIORef Uniq
0)


-----------------------------------------------------
--
--              The Q monad
--
-----------------------------------------------------

newtype Q a = Q { forall a. Q a -> forall (m :: * -> *). Quasi m => m a
unQ :: forall m. Quasi m => m a }

-- \"Runs\" the 'Q' monad. Normal users of Template Haskell
-- should not need this function, as the splice brackets @$( ... )@
-- are the usual way of running a 'Q' computation.
--
-- This function is primarily used in GHC internals, and for debugging
-- splices by running them in 'IO'.
--
-- Note that many functions in 'Q', such as 'reify' and other compiler
-- queries, are not supported when running 'Q' in 'IO'; these operations
-- simply fail at runtime. Indeed, the only operations guaranteed to succeed
-- are 'newName', 'runIO', 'reportError' and 'reportWarning'.
runQ :: Quasi m => Q a -> m a
runQ :: forall (m :: * -> *) a. Quasi m => Q a -> m a
runQ (Q forall (m :: * -> *). Quasi m => m a
m) = forall (m :: * -> *). Quasi m => m a
m

instance Monad Q where
  Q forall (m :: * -> *). Quasi m => m a
m >>= :: forall a b. Q a -> (a -> Q b) -> Q b
>>= a -> Q b
k  = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => m a
m forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= \a
x -> forall a. Q a -> forall (m :: * -> *). Quasi m => m a
unQ (a -> Q b
k a
x))
  >> :: forall a b. Q a -> Q b -> Q b
(>>) = forall (f :: * -> *) a b. Applicative f => f a -> f b -> f b
(*>)

instance MonadFail Q where
  fail :: forall a. String -> Q a
fail String
s     = Bool -> String -> Q ()
report Bool
True String
s forall (m :: * -> *) a b. Monad m => m a -> m b -> m b
>> forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *) a. MonadFail m => String -> m a
fail String
"Q monad failure")

instance Functor Q where
  fmap :: forall a b. (a -> b) -> Q a -> Q b
fmap a -> b
f (Q forall (m :: * -> *). Quasi m => m a
x) = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap a -> b
f forall (m :: * -> *). Quasi m => m a
x)

instance Applicative Q where
  pure :: forall a. a -> Q a
pure a
x = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (f :: * -> *) a. Applicative f => a -> f a
pure a
x)
  Q forall (m :: * -> *). Quasi m => m (a -> b)
f <*> :: forall a b. Q (a -> b) -> Q a -> Q b
<*> Q forall (m :: * -> *). Quasi m => m a
x = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => m (a -> b)
f forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (m :: * -> *). Quasi m => m a
x)
  Q forall (m :: * -> *). Quasi m => m a
m *> :: forall a b. Q a -> Q b -> Q b
*> Q forall (m :: * -> *). Quasi m => m b
n = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => m a
m forall (f :: * -> *) a b. Applicative f => f a -> f b -> f b
*> forall (m :: * -> *). Quasi m => m b
n)

-- | @since 2.17.0.0
instance Semigroup a => Semigroup (Q a) where
  <> :: Q a -> Q a -> Q a
(<>) = forall (f :: * -> *) a b c.
Applicative f =>
(a -> b -> c) -> f a -> f b -> f c
liftA2 forall a. Semigroup a => a -> a -> a
(<>)

-- | @since 2.17.0.0
instance Monoid a => Monoid (Q a) where
  mempty :: Q a
mempty = forall (f :: * -> *) a. Applicative f => a -> f a
pure forall a. Monoid a => a
mempty

-- | If the function passed to 'mfix' inspects its argument,
-- the resulting action will throw a 'FixIOException'.
--
-- @since 2.17.0.0
instance MonadFix Q where
  -- We use the same blackholing approach as in fixIO.
  -- See Note [Blackholing in fixIO] in System.IO in base.
  mfix :: forall a. (a -> Q a) -> Q a
mfix a -> Q a
k = do
    MVar a
m <- forall a. IO a -> Q a
runIO forall a. IO (MVar a)
newEmptyMVar
    a
ans <- forall a. IO a -> Q a
runIO (forall a. IO a -> IO a
unsafeDupableInterleaveIO
             (forall a. MVar a -> IO a
readMVar MVar a
m forall e a. Exception e => IO a -> (e -> IO a) -> IO a
`catch` \BlockedIndefinitelyOnMVar
BlockedIndefinitelyOnMVar ->
                                    forall e a. Exception e => e -> IO a
throwIO FixIOException
FixIOException))
    a
result <- a -> Q a
k a
ans
    forall a. IO a -> Q a
runIO (forall a. MVar a -> a -> IO ()
putMVar MVar a
m a
result)
    forall (m :: * -> *) a. Monad m => a -> m a
return a
result


-----------------------------------------------------
--
--              The Quote class
--
-----------------------------------------------------



-- | The 'Quote' class implements the minimal interface which is necessary for
-- desugaring quotations.
--
-- * The @Monad m@ superclass is needed to stitch together the different
-- AST fragments.
-- * 'newName' is used when desugaring binding structures such as lambdas
-- to generate fresh names.
--
-- Therefore the type of an untyped quotation in GHC is `Quote m => m Exp`
--
-- For many years the type of a quotation was fixed to be `Q Exp` but by
-- more precisely specifying the minimal interface it enables the `Exp` to
-- be extracted purely from the quotation without interacting with `Q`.
class Monad m => Quote m where
  {- |
  Generate a fresh name, which cannot be captured.

  For example, this:

  @f = $(do
    nm1 <- newName \"x\"
    let nm2 = 'mkName' \"x\"
    return ('LamE' ['VarP' nm1] (LamE [VarP nm2] ('VarE' nm1)))
   )@

  will produce the splice

  >f = \x0 -> \x -> x0

  In particular, the occurrence @VarE nm1@ refers to the binding @VarP nm1@,
  and is not captured by the binding @VarP nm2@.

  Although names generated by @newName@ cannot /be captured/, they can
  /capture/ other names. For example, this:

  >g = $(do
  >  nm1 <- newName "x"
  >  let nm2 = mkName "x"
  >  return (LamE [VarP nm2] (LamE [VarP nm1] (VarE nm2)))
  > )

  will produce the splice

  >g = \x -> \x0 -> x0

  since the occurrence @VarE nm2@ is captured by the innermost binding
  of @x@, namely @VarP nm1@.
  -}
  newName :: String -> m Name

instance Quote Q where
  newName :: String -> Q Name
newName String
s = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => String -> m Name
qNewName String
s)

-----------------------------------------------------
--
--              The TExp type
--
-----------------------------------------------------

type role TExp nominal   -- See Note [Role of TExp]
newtype TExp (a :: TYPE (r :: RuntimeRep)) = TExp
  { forall a. TExp a -> Exp
unType :: Exp -- ^ Underlying untyped Template Haskell expression
  }
-- ^ Represents an expression which has type @a@. Built on top of 'Exp', typed
-- expressions allow for type-safe splicing via:
--
--   - typed quotes, written as @[|| ... ||]@ where @...@ is an expression; if
--     that expression has type @a@, then the quotation has type
--     @'Q' ('TExp' a)@
--
--   - typed splices inside of typed quotes, written as @$$(...)@ where @...@
--     is an arbitrary expression of type @'Q' ('TExp' a)@
--
-- Traditional expression quotes and splices let us construct ill-typed
-- expressions:
--
-- >>> fmap ppr $ runQ [| True == $( [| "foo" |] ) |]
-- GHC.Types.True GHC.Classes.== "foo"
-- >>> GHC.Types.True GHC.Classes.== "foo"
-- <interactive> error:
--     • Couldn't match expected type ‘Bool’ with actual type ‘[Char]’
--     • In the second argument of ‘(==)’, namely ‘"foo"’
--       In the expression: True == "foo"
--       In an equation for ‘it’: it = True == "foo"
--
-- With typed expressions, the type error occurs when /constructing/ the
-- Template Haskell expression:
--
-- >>> fmap ppr $ runQ [|| True == $$( [|| "foo" ||] ) ||]
-- <interactive> error:
--     • Couldn't match type ‘[Char]’ with ‘Bool’
--       Expected type: Q (TExp Bool)
--         Actual type: Q (TExp [Char])
--     • In the Template Haskell quotation [|| "foo" ||]
--       In the expression: [|| "foo" ||]
--       In the Template Haskell splice $$([|| "foo" ||])
--
-- Levity-polymorphic since /template-haskell-2.16.0.0/.

-- | Discard the type annotation and produce a plain Template Haskell
-- expression
--
-- Levity-polymorphic since /template-haskell-2.16.0.0/.
unTypeQ :: forall (r :: RuntimeRep) (a :: TYPE r) m . Quote m => m (TExp a) -> m Exp
unTypeQ :: forall a (m :: * -> *). Quote m => m (TExp a) -> m Exp
unTypeQ m (TExp a)
m = do { TExp Exp
e <- m (TExp a)
m
               ; forall (m :: * -> *) a. Monad m => a -> m a
return Exp
e }

-- | Annotate the Template Haskell expression with a type
--
-- This is unsafe because GHC cannot check for you that the expression
-- really does have the type you claim it has.
--
-- Levity-polymorphic since /template-haskell-2.16.0.0/.
unsafeTExpCoerce :: forall (r :: RuntimeRep) (a :: TYPE r) m .
                      Quote m => m Exp -> m (TExp a)
unsafeTExpCoerce :: forall a (m :: * -> *). Quote m => m Exp -> m (TExp a)
unsafeTExpCoerce m Exp
m = do { Exp
e <- m Exp
m
                        ; forall (m :: * -> *) a. Monad m => a -> m a
return (forall a. Exp -> TExp a
TExp Exp
e) }

{- Note [Role of TExp]
~~~~~~~~~~~~~~~~~~~~~~
TExp's argument must have a nominal role, not phantom as would
be inferred (#8459).  Consider

  e :: TExp Age
  e = MkAge 3

  foo = $(coerce e) + 4::Int

The splice will evaluate to (MkAge 3) and you can't add that to
4::Int. So you can't coerce a (TExp Age) to a (TExp Int). -}

-- Code constructor

type role Code representational nominal   -- See Note [Role of TExp]
newtype Code m (a :: TYPE (r :: RuntimeRep)) = Code
  { forall (m :: * -> *) a. Code m a -> m (TExp a)
examineCode :: m (TExp a) -- ^ Underlying monadic value
  }

-- | Unsafely convert an untyped code representation into a typed code
-- representation.
unsafeCodeCoerce :: forall (r :: RuntimeRep) (a :: TYPE r) m .
                      Quote m => m Exp -> Code m a
unsafeCodeCoerce :: forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce m Exp
m = forall (m :: * -> *) a. m (TExp a) -> Code m a
Code (forall a (m :: * -> *). Quote m => m Exp -> m (TExp a)
unsafeTExpCoerce m Exp
m)

-- | Lift a monadic action producing code into the typed 'Code'
-- representation
liftCode :: forall (r :: RuntimeRep) (a :: TYPE r) m . m (TExp a) -> Code m a
liftCode :: forall a (m :: * -> *). m (TExp a) -> Code m a
liftCode = forall (m :: * -> *) a. m (TExp a) -> Code m a
Code

-- | Extract the untyped representation from the typed representation
unTypeCode :: forall (r :: RuntimeRep) (a :: TYPE r) m . Quote m
           => Code m a -> m Exp
unTypeCode :: forall a (m :: * -> *). Quote m => Code m a -> m Exp
unTypeCode = forall a (m :: * -> *). Quote m => m (TExp a) -> m Exp
unTypeQ forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall (m :: * -> *) a. Code m a -> m (TExp a)
examineCode

-- | Modify the ambient monad used during code generation. For example, you
-- can use `hoistCode` to handle a state effect:
-- @
--  handleState :: Code (StateT Int Q) a -> Code Q a
--  handleState = hoistCode (flip runState 0)
-- @
hoistCode :: forall m n (r :: RuntimeRep) (a :: TYPE r) . Monad m
          => (forall x . m x -> n x) -> Code m a -> Code n a
hoistCode :: forall (m :: * -> *) (n :: * -> *) a.
Monad m =>
(forall x. m x -> n x) -> Code m a -> Code n a
hoistCode forall x. m x -> n x
f (Code m (TExp a)
a) = forall (m :: * -> *) a. m (TExp a) -> Code m a
Code (forall x. m x -> n x
f m (TExp a)
a)


-- | Variant of (>>=) which allows effectful computations to be injected
-- into code generation.
bindCode :: forall m a (r :: RuntimeRep) (b :: TYPE r) . Monad m
         => m a -> (a -> Code m b) -> Code m b
bindCode :: forall (m :: * -> *) a b.
Monad m =>
m a -> (a -> Code m b) -> Code m b
bindCode m a
q a -> Code m b
k = forall a (m :: * -> *). m (TExp a) -> Code m a
liftCode (m a
q forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= forall (m :: * -> *) a. Code m a -> m (TExp a)
examineCode forall b c a. (b -> c) -> (a -> b) -> a -> c
. a -> Code m b
k)

-- | Variant of (>>) which allows effectful computations to be injected
-- into code generation.
bindCode_ :: forall m a (r :: RuntimeRep) (b :: TYPE r) . Monad m
          => m a -> Code m b -> Code m b
bindCode_ :: forall (m :: * -> *) a b. Monad m => m a -> Code m b -> Code m b
bindCode_ m a
q Code m b
c = forall a (m :: * -> *). m (TExp a) -> Code m a
liftCode ( m a
q forall (m :: * -> *) a b. Monad m => m a -> m b -> m b
>> forall (m :: * -> *) a. Code m a -> m (TExp a)
examineCode Code m b
c)

-- | A useful combinator for embedding monadic actions into 'Code'
-- @
-- myCode :: ... => Code m a
-- myCode = joinCode $ do
--   x <- someSideEffect
--   return (makeCodeWith x)
-- @
joinCode :: forall m (r :: RuntimeRep) (a :: TYPE r) . Monad m
         => m (Code m a) -> Code m a
joinCode :: forall (m :: * -> *) a. Monad m => m (Code m a) -> Code m a
joinCode = forall a b c. (a -> b -> c) -> b -> a -> c
flip forall (m :: * -> *) a b.
Monad m =>
m a -> (a -> Code m b) -> Code m b
bindCode forall a. a -> a
id

----------------------------------------------------
-- Packaged versions for the programmer, hiding the Quasi-ness


-- | Report an error (True) or warning (False),
-- but carry on; use 'fail' to stop.
report  :: Bool -> String -> Q ()
report :: Bool -> String -> Q ()
report Bool
b String
s = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => Bool -> String -> m ()
qReport Bool
b String
s)
{-# DEPRECATED report "Use reportError or reportWarning instead" #-} -- deprecated in 7.6

-- | Report an error to the user, but allow the current splice's computation to carry on. To abort the computation, use 'fail'.
reportError :: String -> Q ()
reportError :: String -> Q ()
reportError = Bool -> String -> Q ()
report Bool
True

-- | Report a warning to the user, and carry on.
reportWarning :: String -> Q ()
reportWarning :: String -> Q ()
reportWarning = Bool -> String -> Q ()
report Bool
False

-- | Recover from errors raised by 'reportError' or 'fail'.
recover :: Q a -- ^ handler to invoke on failure
        -> Q a -- ^ computation to run
        -> Q a
recover :: forall a. Q a -> Q a -> Q a
recover (Q forall (m :: * -> *). Quasi m => m a
r) (Q forall (m :: * -> *). Quasi m => m a
m) = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *) a. Quasi m => m a -> m a -> m a
qRecover forall (m :: * -> *). Quasi m => m a
r forall (m :: * -> *). Quasi m => m a
m)

-- We don't export lookupName; the Bool isn't a great API
-- Instead we export lookupTypeName, lookupValueName
lookupName :: Bool -> String -> Q (Maybe Name)
lookupName :: Bool -> String -> Q (Maybe Name)
lookupName Bool
ns String
s = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => Bool -> String -> m (Maybe Name)
qLookupName Bool
ns String
s)

-- | Look up the given name in the (type namespace of the) current splice's scope. See "Language.Haskell.TH.Syntax#namelookup" for more details.
lookupTypeName :: String -> Q (Maybe Name)
lookupTypeName :: String -> Q (Maybe Name)
lookupTypeName  String
s = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => Bool -> String -> m (Maybe Name)
qLookupName Bool
True String
s)

-- | Look up the given name in the (value namespace of the) current splice's scope. See "Language.Haskell.TH.Syntax#namelookup" for more details.
lookupValueName :: String -> Q (Maybe Name)
lookupValueName :: String -> Q (Maybe Name)
lookupValueName String
s = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => Bool -> String -> m (Maybe Name)
qLookupName Bool
False String
s)

{-
Note [Name lookup]
~~~~~~~~~~~~~~~~~~
-}
{- $namelookup #namelookup#
The functions 'lookupTypeName' and 'lookupValueName' provide
a way to query the current splice's context for what names
are in scope. The function 'lookupTypeName' queries the type
namespace, whereas 'lookupValueName' queries the value namespace,
but the functions are otherwise identical.

A call @lookupValueName s@ will check if there is a value
with name @s@ in scope at the current splice's location. If
there is, the @Name@ of this value is returned;
if not, then @Nothing@ is returned.

The returned name cannot be \"captured\".
For example:

> f = "global"
> g = $( do
>          Just nm <- lookupValueName "f"
>          [| let f = "local" in $( varE nm ) |]

In this case, @g = \"global\"@; the call to @lookupValueName@
returned the global @f@, and this name was /not/ captured by
the local definition of @f@.

The lookup is performed in the context of the /top-level/ splice
being run. For example:

> f = "global"
> g = $( [| let f = "local" in
>            $(do
>                Just nm <- lookupValueName "f"
>                varE nm
>             ) |] )

Again in this example, @g = \"global\"@, because the call to
@lookupValueName@ queries the context of the outer-most @$(...)@.

Operators should be queried without any surrounding parentheses, like so:

> lookupValueName "+"

Qualified names are also supported, like so:

> lookupValueName "Prelude.+"
> lookupValueName "Prelude.map"

-}


{- | 'reify' looks up information about the 'Name'.

It is sometimes useful to construct the argument name using 'lookupTypeName' or 'lookupValueName'
to ensure that we are reifying from the right namespace. For instance, in this context:

> data D = D

which @D@ does @reify (mkName \"D\")@ return information about? (Answer: @D@-the-type, but don't rely on it.)
To ensure we get information about @D@-the-value, use 'lookupValueName':

> do
>   Just nm <- lookupValueName "D"
>   reify nm

and to get information about @D@-the-type, use 'lookupTypeName'.
-}
reify :: Name -> Q Info
reify :: Name -> Q Info
reify Name
v = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => Name -> m Info
qReify Name
v)

{- | @reifyFixity nm@ attempts to find a fixity declaration for @nm@. For
example, if the function @foo@ has the fixity declaration @infixr 7 foo@, then
@reifyFixity 'foo@ would return @'Just' ('Fixity' 7 'InfixR')@. If the function
@bar@ does not have a fixity declaration, then @reifyFixity 'bar@ returns
'Nothing', so you may assume @bar@ has 'defaultFixity'.
-}
reifyFixity :: Name -> Q (Maybe Fixity)
reifyFixity :: Name -> Q (Maybe Fixity)
reifyFixity Name
nm = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => Name -> m (Maybe Fixity)
qReifyFixity Name
nm)

{- | @reifyType nm@ attempts to find the type or kind of @nm@. For example,
@reifyType 'not@   returns @Bool -> Bool@, and
@reifyType ''Bool@ returns @Type@.
This works even if there's no explicit signature and the type or kind is inferred.
-}
reifyType :: Name -> Q Type
reifyType :: Name -> Q Type
reifyType Name
nm = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => Name -> m Type
qReifyType Name
nm)

{- | @reifyInstances nm tys@ returns a list of visible instances of @nm tys@. That is,
if @nm@ is the name of a type class, then all instances of this class at the types @tys@
are returned. Alternatively, if @nm@ is the name of a data family or type family,
all instances of this family at the types @tys@ are returned.

Note that this is a \"shallow\" test; the declarations returned merely have
instance heads which unify with @nm tys@, they need not actually be satisfiable.

  - @reifyInstances ''Eq [ 'TupleT' 2 \``AppT`\` 'ConT' ''A \``AppT`\` 'ConT' ''B ]@ contains
    the @instance (Eq a, Eq b) => Eq (a, b)@ regardless of whether @A@ and
    @B@ themselves implement 'Eq'

  - @reifyInstances ''Show [ 'VarT' ('mkName' "a") ]@ produces every available
    instance of 'Eq'

There is one edge case: @reifyInstances ''Typeable tys@ currently always
produces an empty list (no matter what @tys@ are given).
-}
reifyInstances :: Name -> [Type] -> Q [InstanceDec]
reifyInstances :: Name -> [Type] -> Q [Dec]
reifyInstances Name
cls [Type]
tys = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => Name -> [Type] -> m [Dec]
qReifyInstances Name
cls [Type]
tys)

{- | @reifyRoles nm@ returns the list of roles associated with the parameters of
the tycon @nm@. Fails if @nm@ cannot be found or is not a tycon.
The returned list should never contain 'InferR'.
-}
reifyRoles :: Name -> Q [Role]
reifyRoles :: Name -> Q [Role]
reifyRoles Name
nm = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => Name -> m [Role]
qReifyRoles Name
nm)

-- | @reifyAnnotations target@ returns the list of annotations
-- associated with @target@.  Only the annotations that are
-- appropriately typed is returned.  So if you have @Int@ and @String@
-- annotations for the same target, you have to call this function twice.
reifyAnnotations :: Data a => AnnLookup -> Q [a]
reifyAnnotations :: forall a. Data a => AnnLookup -> Q [a]
reifyAnnotations AnnLookup
an = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *) a. (Quasi m, Data a) => AnnLookup -> m [a]
qReifyAnnotations AnnLookup
an)

-- | @reifyModule mod@ looks up information about module @mod@.  To
-- look up the current module, call this function with the return
-- value of 'Language.Haskell.TH.Lib.thisModule'.
reifyModule :: Module -> Q ModuleInfo
reifyModule :: Module -> Q ModuleInfo
reifyModule Module
m = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => Module -> m ModuleInfo
qReifyModule Module
m)

-- | @reifyConStrictness nm@ looks up the strictness information for the fields
-- of the constructor with the name @nm@. Note that the strictness information
-- that 'reifyConStrictness' returns may not correspond to what is written in
-- the source code. For example, in the following data declaration:
--
-- @
-- data Pair a = Pair a a
-- @
--
-- 'reifyConStrictness' would return @['DecidedLazy', DecidedLazy]@ under most
-- circumstances, but it would return @['DecidedStrict', DecidedStrict]@ if the
-- @-XStrictData@ language extension was enabled.
reifyConStrictness :: Name -> Q [DecidedStrictness]
reifyConStrictness :: Name -> Q [DecidedStrictness]
reifyConStrictness Name
n = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => Name -> m [DecidedStrictness]
qReifyConStrictness Name
n)

-- | Is the list of instances returned by 'reifyInstances' nonempty?
isInstance :: Name -> [Type] -> Q Bool
isInstance :: Name -> [Type] -> Q Bool
isInstance Name
nm [Type]
tys = do { [Dec]
decs <- Name -> [Type] -> Q [Dec]
reifyInstances Name
nm [Type]
tys
                       ; forall (m :: * -> *) a. Monad m => a -> m a
return (Bool -> Bool
not (forall (t :: * -> *) a. Foldable t => t a -> Bool
null [Dec]
decs)) }

-- | The location at which this computation is spliced.
location :: Q Loc
location :: Q Loc
location = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q forall (m :: * -> *). Quasi m => m Loc
qLocation

-- |The 'runIO' function lets you run an I\/O computation in the 'Q' monad.
-- Take care: you are guaranteed the ordering of calls to 'runIO' within
-- a single 'Q' computation, but not about the order in which splices are run.
--
-- Note: for various murky reasons, stdout and stderr handles are not
-- necessarily flushed when the compiler finishes running, so you should
-- flush them yourself.
runIO :: IO a -> Q a
runIO :: forall a. IO a -> Q a
runIO IO a
m = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *) a. Quasi m => IO a -> m a
qRunIO IO a
m)

-- | Record external files that runIO is using (dependent upon).
-- The compiler can then recognize that it should re-compile the Haskell file
-- when an external file changes.
--
-- Expects an absolute file path.
--
-- Notes:
--
--   * ghc -M does not know about these dependencies - it does not execute TH.
--
--   * The dependency is based on file content, not a modification time
addDependentFile :: FilePath -> Q ()
addDependentFile :: String -> Q ()
addDependentFile String
fp = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => String -> m ()
qAddDependentFile String
fp)

-- | Obtain a temporary file path with the given suffix. The compiler will
-- delete this file after compilation.
addTempFile :: String -> Q FilePath
addTempFile :: String -> Q String
addTempFile String
suffix = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => String -> m String
qAddTempFile String
suffix)

-- | Add additional top-level declarations. The added declarations will be type
-- checked along with the current declaration group.
addTopDecls :: [Dec] -> Q ()
addTopDecls :: [Dec] -> Q ()
addTopDecls [Dec]
ds = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => [Dec] -> m ()
qAddTopDecls [Dec]
ds)

-- |
addForeignFile :: ForeignSrcLang -> String -> Q ()
addForeignFile :: ForeignSrcLang -> String -> Q ()
addForeignFile = ForeignSrcLang -> String -> Q ()
addForeignSource
{-# DEPRECATED addForeignFile
               "Use 'Language.Haskell.TH.Syntax.addForeignSource' instead"
  #-} -- deprecated in 8.6

-- | Emit a foreign file which will be compiled and linked to the object for
-- the current module. Currently only languages that can be compiled with
-- the C compiler are supported, and the flags passed as part of -optc will
-- be also applied to the C compiler invocation that will compile them.
--
-- Note that for non-C languages (for example C++) @extern "C"@ directives
-- must be used to get symbols that we can access from Haskell.
--
-- To get better errors, it is recommended to use #line pragmas when
-- emitting C files, e.g.
--
-- > {-# LANGUAGE CPP #-}
-- > ...
-- > addForeignSource LangC $ unlines
-- >   [ "#line " ++ show (__LINE__ + 1) ++ " " ++ show __FILE__
-- >   , ...
-- >   ]
addForeignSource :: ForeignSrcLang -> String -> Q ()
addForeignSource :: ForeignSrcLang -> String -> Q ()
addForeignSource ForeignSrcLang
lang String
src = do
  let suffix :: String
suffix = case ForeignSrcLang
lang of
                 ForeignSrcLang
LangC      -> String
"c"
                 ForeignSrcLang
LangCxx    -> String
"cpp"
                 ForeignSrcLang
LangObjc   -> String
"m"
                 ForeignSrcLang
LangObjcxx -> String
"mm"
                 ForeignSrcLang
LangAsm    -> String
"s"
                 ForeignSrcLang
RawObject  -> String
"a"
  String
path <- String -> Q String
addTempFile String
suffix
  forall a. IO a -> Q a
runIO forall a b. (a -> b) -> a -> b
$ String -> String -> IO ()
writeFile String
path String
src
  ForeignSrcLang -> String -> Q ()
addForeignFilePath ForeignSrcLang
lang String
path

-- | Same as 'addForeignSource', but expects to receive a path pointing to the
-- foreign file instead of a 'String' of its contents. Consider using this in
-- conjunction with 'addTempFile'.
--
-- This is a good alternative to 'addForeignSource' when you are trying to
-- directly link in an object file.
addForeignFilePath :: ForeignSrcLang -> FilePath -> Q ()
addForeignFilePath :: ForeignSrcLang -> String -> Q ()
addForeignFilePath ForeignSrcLang
lang String
fp = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => ForeignSrcLang -> String -> m ()
qAddForeignFilePath ForeignSrcLang
lang String
fp)

-- | Add a finalizer that will run in the Q monad after the current module has
-- been type checked. This only makes sense when run within a top-level splice.
--
-- The finalizer is given the local type environment at the splice point. Thus
-- 'reify' is able to find the local definitions when executed inside the
-- finalizer.
addModFinalizer :: Q () -> Q ()
addModFinalizer :: Q () -> Q ()
addModFinalizer Q ()
act = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => Q () -> m ()
qAddModFinalizer (forall a. Q a -> forall (m :: * -> *). Quasi m => m a
unQ Q ()
act))

-- | Adds a core plugin to the compilation pipeline.
--
-- @addCorePlugin m@ has almost the same effect as passing @-fplugin=m@ to ghc
-- in the command line. The major difference is that the plugin module @m@
-- must not belong to the current package. When TH executes, it is too late
-- to tell the compiler that we needed to compile first a plugin module in the
-- current package.
addCorePlugin :: String -> Q ()
addCorePlugin :: String -> Q ()
addCorePlugin String
plugin = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => String -> m ()
qAddCorePlugin String
plugin)

-- | Get state from the 'Q' monad. Note that the state is local to the
-- Haskell module in which the Template Haskell expression is executed.
getQ :: Typeable a => Q (Maybe a)
getQ :: forall a. Typeable a => Q (Maybe a)
getQ = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q forall (m :: * -> *) a. (Quasi m, Typeable a) => m (Maybe a)
qGetQ

-- | Replace the state in the 'Q' monad. Note that the state is local to the
-- Haskell module in which the Template Haskell expression is executed.
putQ :: Typeable a => a -> Q ()
putQ :: forall a. Typeable a => a -> Q ()
putQ a
x = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *) a. (Quasi m, Typeable a) => a -> m ()
qPutQ a
x)

-- | Determine whether the given language extension is enabled in the 'Q' monad.
isExtEnabled :: Extension -> Q Bool
isExtEnabled :: Extension -> Q Bool
isExtEnabled Extension
ext = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => Extension -> m Bool
qIsExtEnabled Extension
ext)

-- | List all enabled language extensions.
extsEnabled :: Q [Extension]
extsEnabled :: Q [Extension]
extsEnabled = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q forall (m :: * -> *). Quasi m => m [Extension]
qExtsEnabled

-- | Add Haddock documentation to the specified location. This will overwrite
-- any documentation at the location if it already exists. This will reify the
-- specified name, so it must be in scope when you call it. If you want to add
-- documentation to something that you are currently splicing, you can use
-- 'addModFinalizer' e.g.
--
-- > do
-- >   let nm = mkName "x"
-- >   addModFinalizer $ putDoc (DeclDoc nm) "Hello"
-- >   [d| $(varP nm) = 42 |]
--
-- The helper functions 'withDecDoc' and 'withDecsDoc' will do this for you, as
-- will the 'funD_doc' and other @_doc@ combinators.
-- You most likely want to have the @-haddock@ flag turned on when using this.
-- Adding documentation to anything outside of the current module will cause an
-- error.
putDoc :: DocLoc -> String -> Q ()
putDoc :: DocLoc -> String -> Q ()
putDoc DocLoc
t String
s = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => DocLoc -> String -> m ()
qPutDoc DocLoc
t String
s)

-- | Retreives the Haddock documentation at the specified location, if one
-- exists.
-- It can be used to read documentation on things defined outside of the current
-- module, provided that those modules were compiled with the @-haddock@ flag.
getDoc :: DocLoc -> Q (Maybe String)
getDoc :: DocLoc -> Q (Maybe String)
getDoc DocLoc
n = forall a. (forall (m :: * -> *). Quasi m => m a) -> Q a
Q (forall (m :: * -> *). Quasi m => DocLoc -> m (Maybe String)
qGetDoc DocLoc
n)

instance MonadIO Q where
  liftIO :: forall a. IO a -> Q a
liftIO = forall a. IO a -> Q a
runIO

instance Quasi Q where
  qNewName :: String -> Q Name
qNewName            = forall (m :: * -> *). Quote m => String -> m Name
newName
  qReport :: Bool -> String -> Q ()
qReport             = Bool -> String -> Q ()
report
  qRecover :: forall a. Q a -> Q a -> Q a
qRecover            = forall a. Q a -> Q a -> Q a
recover
  qReify :: Name -> Q Info
qReify              = Name -> Q Info
reify
  qReifyFixity :: Name -> Q (Maybe Fixity)
qReifyFixity        = Name -> Q (Maybe Fixity)
reifyFixity
  qReifyType :: Name -> Q Type
qReifyType          = Name -> Q Type
reifyType
  qReifyInstances :: Name -> [Type] -> Q [Dec]
qReifyInstances     = Name -> [Type] -> Q [Dec]
reifyInstances
  qReifyRoles :: Name -> Q [Role]
qReifyRoles         = Name -> Q [Role]
reifyRoles
  qReifyAnnotations :: forall a. Data a => AnnLookup -> Q [a]
qReifyAnnotations   = forall a. Data a => AnnLookup -> Q [a]
reifyAnnotations
  qReifyModule :: Module -> Q ModuleInfo
qReifyModule        = Module -> Q ModuleInfo
reifyModule
  qReifyConStrictness :: Name -> Q [DecidedStrictness]
qReifyConStrictness = Name -> Q [DecidedStrictness]
reifyConStrictness
  qLookupName :: Bool -> String -> Q (Maybe Name)
qLookupName         = Bool -> String -> Q (Maybe Name)
lookupName
  qLocation :: Q Loc
qLocation           = Q Loc
location
  qAddDependentFile :: String -> Q ()
qAddDependentFile   = String -> Q ()
addDependentFile
  qAddTempFile :: String -> Q String
qAddTempFile        = String -> Q String
addTempFile
  qAddTopDecls :: [Dec] -> Q ()
qAddTopDecls        = [Dec] -> Q ()
addTopDecls
  qAddForeignFilePath :: ForeignSrcLang -> String -> Q ()
qAddForeignFilePath = ForeignSrcLang -> String -> Q ()
addForeignFilePath
  qAddModFinalizer :: Q () -> Q ()
qAddModFinalizer    = Q () -> Q ()
addModFinalizer
  qAddCorePlugin :: String -> Q ()
qAddCorePlugin      = String -> Q ()
addCorePlugin
  qGetQ :: forall a. Typeable a => Q (Maybe a)
qGetQ               = forall a. Typeable a => Q (Maybe a)
getQ
  qPutQ :: forall a. Typeable a => a -> Q ()
qPutQ               = forall a. Typeable a => a -> Q ()
putQ
  qIsExtEnabled :: Extension -> Q Bool
qIsExtEnabled       = Extension -> Q Bool
isExtEnabled
  qExtsEnabled :: Q [Extension]
qExtsEnabled        = Q [Extension]
extsEnabled
  qPutDoc :: DocLoc -> String -> Q ()
qPutDoc             = DocLoc -> String -> Q ()
putDoc
  qGetDoc :: DocLoc -> Q (Maybe String)
qGetDoc             = DocLoc -> Q (Maybe String)
getDoc


----------------------------------------------------
-- The following operations are used solely in GHC.HsToCore.Quote when
-- desugaring brackets. They are not necessary for the user, who can use
-- ordinary return and (>>=) etc

sequenceQ :: forall m . Monad m => forall a . [m a] -> m [a]
sequenceQ :: forall (m :: * -> *) a. Monad m => [m a] -> m [a]
sequenceQ = forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence


-----------------------------------------------------
--
--              The Lift class
--
-----------------------------------------------------

-- | A 'Lift' instance can have any of its values turned into a Template
-- Haskell expression. This is needed when a value used within a Template
-- Haskell quotation is bound outside the Oxford brackets (@[| ... |]@ or
-- @[|| ... ||]@) but not at the top level. As an example:
--
-- > add1 :: Int -> Q (TExp Int)
-- > add1 x = [|| x + 1 ||]
--
-- Template Haskell has no way of knowing what value @x@ will take on at
-- splice-time, so it requires the type of @x@ to be an instance of 'Lift'.
--
-- A 'Lift' instance must satisfy @$(lift x) ≡ x@ and @$$(liftTyped x) ≡ x@
-- for all @x@, where @$(...)@ and @$$(...)@ are Template Haskell splices.
-- It is additionally expected that @'lift' x ≡ 'unTypeQ' ('liftTyped' x)@.
--
-- 'Lift' instances can be derived automatically by use of the @-XDeriveLift@
-- GHC language extension:
--
-- > {-# LANGUAGE DeriveLift #-}
-- > module Foo where
-- >
-- > import Language.Haskell.TH.Syntax
-- >
-- > data Bar a = Bar1 a (Bar a) | Bar2 String
-- >   deriving Lift
--
-- Levity-polymorphic since /template-haskell-2.16.0.0/.
class Lift (t :: TYPE r) where
  -- | Turn a value into a Template Haskell expression, suitable for use in
  -- a splice.
  lift :: Quote m => t -> m Exp
#if __GLASGOW_HASKELL__ >= 901
  default lift :: (r ~ ('BoxedRep 'Lifted), Quote m) => t -> m Exp
#else
  default lift :: (r ~ 'LiftedRep, Quote m) => t -> m Exp
#endif
  lift = forall a (m :: * -> *). Quote m => Code m a -> m Exp
unTypeCode forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall t (m :: * -> *). (Lift t, Quote m) => t -> Code m t
liftTyped

  -- | Turn a value into a Template Haskell typed expression, suitable for use
  -- in a typed splice.
  --
  -- @since 2.16.0.0
  liftTyped :: Quote m => t -> Code m t


-- If you add any instances here, consider updating test th/TH_Lift
instance Lift Integer where
  liftTyped :: forall (m :: * -> *). Quote m => Uniq -> Code m Uniq
liftTyped Uniq
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Uniq
x)
  lift :: forall (m :: * -> *). Quote m => Uniq -> m Exp
lift Uniq
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Uniq -> Lit
IntegerL Uniq
x))

instance Lift Int where
  liftTyped :: forall (m :: * -> *). Quote m => Int -> Code m Int
liftTyped Int
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Int
x)
  lift :: forall (m :: * -> *). Quote m => Int -> m Exp
lift Int
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Uniq -> Lit
IntegerL (forall a b. (Integral a, Num b) => a -> b
fromIntegral Int
x)))

-- | @since 2.16.0.0
instance Lift Int# where
  liftTyped :: forall (m :: * -> *). Quote m => Int# -> Code m Int#
liftTyped Int#
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Int#
x)
  lift :: forall (m :: * -> *). Quote m => Int# -> m Exp
lift Int#
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Uniq -> Lit
IntPrimL (forall a b. (Integral a, Num b) => a -> b
fromIntegral (Int# -> Int
I# Int#
x))))

instance Lift Int8 where
  liftTyped :: forall (m :: * -> *). Quote m => Int8 -> Code m Int8
liftTyped Int8
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Int8
x)
  lift :: forall (m :: * -> *). Quote m => Int8 -> m Exp
lift Int8
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Uniq -> Lit
IntegerL (forall a b. (Integral a, Num b) => a -> b
fromIntegral Int8
x)))

instance Lift Int16 where
  liftTyped :: forall (m :: * -> *). Quote m => Int16 -> Code m Int16
liftTyped Int16
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Int16
x)
  lift :: forall (m :: * -> *). Quote m => Int16 -> m Exp
lift Int16
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Uniq -> Lit
IntegerL (forall a b. (Integral a, Num b) => a -> b
fromIntegral Int16
x)))

instance Lift Int32 where
  liftTyped :: forall (m :: * -> *). Quote m => Int32 -> Code m Int32
liftTyped Int32
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Int32
x)
  lift :: forall (m :: * -> *). Quote m => Int32 -> m Exp
lift Int32
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Uniq -> Lit
IntegerL (forall a b. (Integral a, Num b) => a -> b
fromIntegral Int32
x)))

instance Lift Int64 where
  liftTyped :: forall (m :: * -> *). Quote m => Int64 -> Code m Int64
liftTyped Int64
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Int64
x)
  lift :: forall (m :: * -> *). Quote m => Int64 -> m Exp
lift Int64
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Uniq -> Lit
IntegerL (forall a b. (Integral a, Num b) => a -> b
fromIntegral Int64
x)))

-- | @since 2.16.0.0
instance Lift Word# where
  liftTyped :: forall (m :: * -> *). Quote m => Word# -> Code m Word#
liftTyped Word#
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Word#
x)
  lift :: forall (m :: * -> *). Quote m => Word# -> m Exp
lift Word#
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Uniq -> Lit
WordPrimL (forall a b. (Integral a, Num b) => a -> b
fromIntegral (Word# -> Word
W# Word#
x))))

instance Lift Word where
  liftTyped :: forall (m :: * -> *). Quote m => Word -> Code m Word
liftTyped Word
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Word
x)
  lift :: forall (m :: * -> *). Quote m => Word -> m Exp
lift Word
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Uniq -> Lit
IntegerL (forall a b. (Integral a, Num b) => a -> b
fromIntegral Word
x)))

instance Lift Word8 where
  liftTyped :: forall (m :: * -> *). Quote m => Word8 -> Code m Word8
liftTyped Word8
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Word8
x)
  lift :: forall (m :: * -> *). Quote m => Word8 -> m Exp
lift Word8
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Uniq -> Lit
IntegerL (forall a b. (Integral a, Num b) => a -> b
fromIntegral Word8
x)))

instance Lift Word16 where
  liftTyped :: forall (m :: * -> *). Quote m => Word16 -> Code m Word16
liftTyped Word16
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Word16
x)
  lift :: forall (m :: * -> *). Quote m => Word16 -> m Exp
lift Word16
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Uniq -> Lit
IntegerL (forall a b. (Integral a, Num b) => a -> b
fromIntegral Word16
x)))

instance Lift Word32 where
  liftTyped :: forall (m :: * -> *). Quote m => Word32 -> Code m Word32
liftTyped Word32
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Word32
x)
  lift :: forall (m :: * -> *). Quote m => Word32 -> m Exp
lift Word32
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Uniq -> Lit
IntegerL (forall a b. (Integral a, Num b) => a -> b
fromIntegral Word32
x)))

instance Lift Word64 where
  liftTyped :: forall (m :: * -> *). Quote m => Word64 -> Code m Word64
liftTyped Word64
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Word64
x)
  lift :: forall (m :: * -> *). Quote m => Word64 -> m Exp
lift Word64
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Uniq -> Lit
IntegerL (forall a b. (Integral a, Num b) => a -> b
fromIntegral Word64
x)))

instance Lift Natural where
  liftTyped :: forall (m :: * -> *). Quote m => Natural -> Code m Natural
liftTyped Natural
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Natural
x)
  lift :: forall (m :: * -> *). Quote m => Natural -> m Exp
lift Natural
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Uniq -> Lit
IntegerL (forall a b. (Integral a, Num b) => a -> b
fromIntegral Natural
x)))

instance Integral a => Lift (Ratio a) where
  liftTyped :: forall (m :: * -> *). Quote m => Ratio a -> Code m (Ratio a)
liftTyped Ratio a
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Ratio a
x)
  lift :: forall (m :: * -> *). Quote m => Ratio a -> m Exp
lift Ratio a
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Rational -> Lit
RationalL (forall a. Real a => a -> Rational
toRational Ratio a
x)))

instance Lift Float where
  liftTyped :: forall (m :: * -> *). Quote m => Float -> Code m Float
liftTyped Float
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Float
x)
  lift :: forall (m :: * -> *). Quote m => Float -> m Exp
lift Float
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Rational -> Lit
RationalL (forall a. Real a => a -> Rational
toRational Float
x)))

-- | @since 2.16.0.0
instance Lift Float# where
  liftTyped :: forall (m :: * -> *). Quote m => Float# -> Code m Float#
liftTyped Float#
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Float#
x)
  lift :: forall (m :: * -> *). Quote m => Float# -> m Exp
lift Float#
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Rational -> Lit
FloatPrimL (forall a. Real a => a -> Rational
toRational (Float# -> Float
F# Float#
x))))

instance Lift Double where
  liftTyped :: forall (m :: * -> *). Quote m => Double -> Code m Double
liftTyped Double
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Double
x)
  lift :: forall (m :: * -> *). Quote m => Double -> m Exp
lift Double
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Rational -> Lit
RationalL (forall a. Real a => a -> Rational
toRational Double
x)))

-- | @since 2.16.0.0
instance Lift Double# where
  liftTyped :: forall (m :: * -> *). Quote m => Double# -> Code m Double#
liftTyped Double#
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Double#
x)
  lift :: forall (m :: * -> *). Quote m => Double# -> m Exp
lift Double#
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Rational -> Lit
DoublePrimL (forall a. Real a => a -> Rational
toRational (Double# -> Double
D# Double#
x))))

instance Lift Char where
  liftTyped :: forall (m :: * -> *). Quote m => Char -> Code m Char
liftTyped Char
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Char
x)
  lift :: forall (m :: * -> *). Quote m => Char -> m Exp
lift Char
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Char -> Lit
CharL Char
x))

-- | @since 2.16.0.0
instance Lift Char# where
  liftTyped :: forall (m :: * -> *). Quote m => Char# -> Code m Char#
liftTyped Char#
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Char#
x)
  lift :: forall (m :: * -> *). Quote m => Char# -> m Exp
lift Char#
x = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (Char -> Lit
CharPrimL (Char# -> Char
C# Char#
x)))

instance Lift Bool where
  liftTyped :: forall (m :: * -> *). Quote m => Bool -> Code m Bool
liftTyped Bool
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Bool
x)

  lift :: forall (m :: * -> *). Quote m => Bool -> m Exp
lift Bool
True  = forall (m :: * -> *) a. Monad m => a -> m a
return (Name -> Exp
ConE Name
trueName)
  lift Bool
False = forall (m :: * -> *) a. Monad m => a -> m a
return (Name -> Exp
ConE Name
falseName)

-- | Produces an 'Addr#' literal from the NUL-terminated C-string starting at
-- the given memory address.
--
-- @since 2.16.0.0
instance Lift Addr# where
  liftTyped :: forall (m :: * -> *). Quote m => Addr# -> Code m Addr#
liftTyped Addr#
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Addr#
x)
  lift :: forall (m :: * -> *). Quote m => Addr# -> m Exp
lift Addr#
x
    = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE ([Word8] -> Lit
StringPrimL (forall a b. (a -> b) -> [a] -> [b]
map (forall a b. (Integral a, Num b) => a -> b
fromIntegral forall b c a. (b -> c) -> (a -> b) -> a -> c
. Char -> Int
ord) (Addr# -> String
unpackCString# Addr#
x))))

instance Lift a => Lift (Maybe a) where
  liftTyped :: forall (m :: * -> *). Quote m => Maybe a -> Code m (Maybe a)
liftTyped Maybe a
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Maybe a
x)

  lift :: forall (m :: * -> *). Quote m => Maybe a -> m Exp
lift Maybe a
Nothing  = forall (m :: * -> *) a. Monad m => a -> m a
return (Name -> Exp
ConE Name
nothingName)
  lift (Just a
x) = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM (Name -> Exp
ConE Name
justName Exp -> Exp -> Exp
`AppE`) (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
x)

instance (Lift a, Lift b) => Lift (Either a b) where
  liftTyped :: forall (m :: * -> *). Quote m => Either a b -> Code m (Either a b)
liftTyped Either a b
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift Either a b
x)

  lift :: forall (m :: * -> *). Quote m => Either a b -> m Exp
lift (Left a
x)  = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM (Name -> Exp
ConE Name
leftName  Exp -> Exp -> Exp
`AppE`) (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
x)
  lift (Right b
y) = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM (Name -> Exp
ConE Name
rightName Exp -> Exp -> Exp
`AppE`) (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
y)

instance Lift a => Lift [a] where
  liftTyped :: forall (m :: * -> *). Quote m => [a] -> Code m [a]
liftTyped [a]
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift [a]
x)
  lift :: forall (m :: * -> *). Quote m => [a] -> m Exp
lift [a]
xs = do { [Exp]
xs' <- forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift [a]
xs; forall (m :: * -> *) a. Monad m => a -> m a
return ([Exp] -> Exp
ListE [Exp]
xs') }

liftString :: Quote m => String -> m Exp
-- Used in GHC.Tc.Gen.Expr to short-circuit the lifting for strings
liftString :: forall (m :: * -> *). Quote m => String -> m Exp
liftString String
s = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE (String -> Lit
StringL String
s))

-- | @since 2.15.0.0
instance Lift a => Lift (NonEmpty a) where
  liftTyped :: forall (m :: * -> *). Quote m => NonEmpty a -> Code m (NonEmpty a)
liftTyped NonEmpty a
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift NonEmpty a
x)

  lift :: forall (m :: * -> *). Quote m => NonEmpty a -> m Exp
lift (a
x :| [a]
xs) = do
    Exp
x' <- forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
x
    Exp
xs' <- forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift [a]
xs
    forall (m :: * -> *) a. Monad m => a -> m a
return (Maybe Exp -> Exp -> Maybe Exp -> Exp
InfixE (forall a. a -> Maybe a
Just Exp
x') (Name -> Exp
ConE Name
nonemptyName) (forall a. a -> Maybe a
Just Exp
xs'))

-- | @since 2.15.0.0
instance Lift Void where
  liftTyped :: forall (m :: * -> *). Quote m => Void -> Code m Void
liftTyped = forall a (m :: * -> *). m (TExp a) -> Code m a
liftCode forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a. Void -> a
absurd
  lift :: forall (m :: * -> *). Quote m => Void -> m Exp
lift = forall (f :: * -> *) a. Applicative f => a -> f a
pure forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a. Void -> a
absurd

instance Lift () where
  liftTyped :: forall (m :: * -> *). Quote m => () -> Code m ()
liftTyped ()
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift ()
x)
  lift :: forall (m :: * -> *). Quote m => () -> m Exp
lift () = forall (m :: * -> *) a. Monad m => a -> m a
return (Name -> Exp
ConE (Int -> Name
tupleDataName Int
0))

instance (Lift a, Lift b) => Lift (a, b) where
  liftTyped :: forall (m :: * -> *). Quote m => (a, b) -> Code m (a, b)
liftTyped (a, b)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (a, b)
x)
  lift :: forall (m :: * -> *). Quote m => (a, b) -> m Exp
lift (a
a, b
b)
    = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM [Maybe Exp] -> Exp
TupE forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map (forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap forall a. a -> Maybe a
Just) [forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
a, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
b]

instance (Lift a, Lift b, Lift c) => Lift (a, b, c) where
  liftTyped :: forall (m :: * -> *). Quote m => (a, b, c) -> Code m (a, b, c)
liftTyped (a, b, c)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (a, b, c)
x)
  lift :: forall (m :: * -> *). Quote m => (a, b, c) -> m Exp
lift (a
a, b
b, c
c)
    = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM [Maybe Exp] -> Exp
TupE forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map (forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap forall a. a -> Maybe a
Just) [forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
a, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
b, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift c
c]

instance (Lift a, Lift b, Lift c, Lift d) => Lift (a, b, c, d) where
  liftTyped :: forall (m :: * -> *).
Quote m =>
(a, b, c, d) -> Code m (a, b, c, d)
liftTyped (a, b, c, d)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (a, b, c, d)
x)
  lift :: forall (m :: * -> *). Quote m => (a, b, c, d) -> m Exp
lift (a
a, b
b, c
c, d
d)
    = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM [Maybe Exp] -> Exp
TupE forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map (forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap forall a. a -> Maybe a
Just) [forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
a, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
b, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift c
c, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift d
d]

instance (Lift a, Lift b, Lift c, Lift d, Lift e)
      => Lift (a, b, c, d, e) where
  liftTyped :: forall (m :: * -> *).
Quote m =>
(a, b, c, d, e) -> Code m (a, b, c, d, e)
liftTyped (a, b, c, d, e)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (a, b, c, d, e)
x)
  lift :: forall (m :: * -> *). Quote m => (a, b, c, d, e) -> m Exp
lift (a
a, b
b, c
c, d
d, e
e)
    = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM [Maybe Exp] -> Exp
TupE forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map (forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap forall a. a -> Maybe a
Just) [ forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
a, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
b
                                              , forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift c
c, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift d
d, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift e
e ]

instance (Lift a, Lift b, Lift c, Lift d, Lift e, Lift f)
      => Lift (a, b, c, d, e, f) where
  liftTyped :: forall (m :: * -> *).
Quote m =>
(a, b, c, d, e, f) -> Code m (a, b, c, d, e, f)
liftTyped (a, b, c, d, e, f)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (a, b, c, d, e, f)
x)
  lift :: forall (m :: * -> *). Quote m => (a, b, c, d, e, f) -> m Exp
lift (a
a, b
b, c
c, d
d, e
e, f
f)
    = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM [Maybe Exp] -> Exp
TupE forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map (forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap forall a. a -> Maybe a
Just) [ forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
a, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
b, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift c
c
                                              , forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift d
d, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift e
e, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift f
f ]

instance (Lift a, Lift b, Lift c, Lift d, Lift e, Lift f, Lift g)
      => Lift (a, b, c, d, e, f, g) where
  liftTyped :: forall (m :: * -> *).
Quote m =>
(a, b, c, d, e, f, g) -> Code m (a, b, c, d, e, f, g)
liftTyped (a, b, c, d, e, f, g)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (a, b, c, d, e, f, g)
x)
  lift :: forall (m :: * -> *). Quote m => (a, b, c, d, e, f, g) -> m Exp
lift (a
a, b
b, c
c, d
d, e
e, f
f, g
g)
    = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM [Maybe Exp] -> Exp
TupE forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map (forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap forall a. a -> Maybe a
Just) [ forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
a, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
b, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift c
c
                                              , forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift d
d, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift e
e, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift f
f, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift g
g ]

-- | @since 2.16.0.0
instance Lift (# #) where
  liftTyped :: forall (m :: * -> *). Quote m => (# #) -> Code m (# #)
liftTyped (# #)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (# #)
x)
  lift :: forall (m :: * -> *). Quote m => (# #) -> m Exp
lift (# #) = forall (m :: * -> *) a. Monad m => a -> m a
return (Name -> Exp
ConE (Int -> Name
unboxedTupleTypeName Int
0))

-- | @since 2.16.0.0
instance (Lift a) => Lift (# a #) where
  liftTyped :: forall (m :: * -> *). Quote m => (# a #) -> Code m (# a #)
liftTyped (# a #)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (# a #)
x)
  lift :: forall (m :: * -> *). Quote m => (# a #) -> m Exp
lift (# a
a #)
    = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM [Maybe Exp] -> Exp
UnboxedTupE forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map (forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap forall a. a -> Maybe a
Just) [forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
a]

-- | @since 2.16.0.0
instance (Lift a, Lift b) => Lift (# a, b #) where
  liftTyped :: forall (m :: * -> *). Quote m => (# a, b #) -> Code m (# a, b #)
liftTyped (# a, b #)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (# a, b #)
x)
  lift :: forall (m :: * -> *). Quote m => (# a, b #) -> m Exp
lift (# a
a, b
b #)
    = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM [Maybe Exp] -> Exp
UnboxedTupE forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map (forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap forall a. a -> Maybe a
Just) [forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
a, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
b]

-- | @since 2.16.0.0
instance (Lift a, Lift b, Lift c)
      => Lift (# a, b, c #) where
  liftTyped :: forall (m :: * -> *).
Quote m =>
(# a, b, c #) -> Code m (# a, b, c #)
liftTyped (# a, b, c #)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (# a, b, c #)
x)
  lift :: forall (m :: * -> *). Quote m => (# a, b, c #) -> m Exp
lift (# a
a, b
b, c
c #)
    = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM [Maybe Exp] -> Exp
UnboxedTupE forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map (forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap forall a. a -> Maybe a
Just) [forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
a, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
b, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift c
c]

-- | @since 2.16.0.0
instance (Lift a, Lift b, Lift c, Lift d)
      => Lift (# a, b, c, d #) where
  liftTyped :: forall (m :: * -> *).
Quote m =>
(# a, b, c, d #) -> Code m (# a, b, c, d #)
liftTyped (# a, b, c, d #)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (# a, b, c, d #)
x)
  lift :: forall (m :: * -> *). Quote m => (# a, b, c, d #) -> m Exp
lift (# a
a, b
b, c
c, d
d #)
    = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM [Maybe Exp] -> Exp
UnboxedTupE forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map (forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap forall a. a -> Maybe a
Just) [ forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
a, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
b
                                                     , forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift c
c, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift d
d ]

-- | @since 2.16.0.0
instance (Lift a, Lift b, Lift c, Lift d, Lift e)
      => Lift (# a, b, c, d, e #) where
  liftTyped :: forall (m :: * -> *).
Quote m =>
(# a, b, c, d, e #) -> Code m (# a, b, c, d, e #)
liftTyped (# a, b, c, d, e #)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (# a, b, c, d, e #)
x)
  lift :: forall (m :: * -> *). Quote m => (# a, b, c, d, e #) -> m Exp
lift (# a
a, b
b, c
c, d
d, e
e #)
    = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM [Maybe Exp] -> Exp
UnboxedTupE forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map (forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap forall a. a -> Maybe a
Just) [ forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
a, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
b
                                                     , forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift c
c, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift d
d, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift e
e ]

-- | @since 2.16.0.0
instance (Lift a, Lift b, Lift c, Lift d, Lift e, Lift f)
      => Lift (# a, b, c, d, e, f #) where
  liftTyped :: forall (m :: * -> *).
Quote m =>
(# a, b, c, d, e, f #) -> Code m (# a, b, c, d, e, f #)
liftTyped (# a, b, c, d, e, f #)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (# a, b, c, d, e, f #)
x)
  lift :: forall (m :: * -> *). Quote m => (# a, b, c, d, e, f #) -> m Exp
lift (# a
a, b
b, c
c, d
d, e
e, f
f #)
    = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM [Maybe Exp] -> Exp
UnboxedTupE forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map (forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap forall a. a -> Maybe a
Just) [ forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
a, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
b, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift c
c
                                                     , forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift d
d, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift e
e, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift f
f ]

-- | @since 2.16.0.0
instance (Lift a, Lift b, Lift c, Lift d, Lift e, Lift f, Lift g)
      => Lift (# a, b, c, d, e, f, g #) where
  liftTyped :: forall (m :: * -> *).
Quote m =>
(# a, b, c, d, e, f, g #) -> Code m (# a, b, c, d, e, f, g #)
liftTyped (# a, b, c, d, e, f, g #)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (# a, b, c, d, e, f, g #)
x)
  lift :: forall (m :: * -> *). Quote m => (# a, b, c, d, e, f, g #) -> m Exp
lift (# a
a, b
b, c
c, d
d, e
e, f
f, g
g #)
    = forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM [Maybe Exp] -> Exp
UnboxedTupE forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map (forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap forall a. a -> Maybe a
Just) [ forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
a, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
b, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift c
c
                                                     , forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift d
d, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift e
e, forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift f
f
                                                     , forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift g
g ]

-- | @since 2.16.0.0
instance (Lift a, Lift b) => Lift (# a | b #) where
  liftTyped :: forall (m :: * -> *). Quote m => (# a | b #) -> Code m (# a | b #)
liftTyped (# a | b #)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (# a | b #)
x)
  lift :: forall (m :: * -> *). Quote m => (# a | b #) -> m Exp
lift (# a | b #)
x
    = case (# a | b #)
x of
        (# a
y | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
1 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
2
        (# | b
y #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
2 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
2

-- | @since 2.16.0.0
instance (Lift a, Lift b, Lift c)
      => Lift (# a | b | c #) where
  liftTyped :: forall (m :: * -> *).
Quote m =>
(# a | b | c #) -> Code m (# a | b | c #)
liftTyped (# a | b | c #)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (# a | b | c #)
x)
  lift :: forall (m :: * -> *). Quote m => (# a | b | c #) -> m Exp
lift (# a | b | c #)
x
    = case (# a | b | c #)
x of
        (# a
y | | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
1 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
3
        (# | b
y | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
2 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
3
        (# | | c
y #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift c
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
3 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
3

-- | @since 2.16.0.0
instance (Lift a, Lift b, Lift c, Lift d)
      => Lift (# a | b | c | d #) where
  liftTyped :: forall (m :: * -> *).
Quote m =>
(# a | b | c | d #) -> Code m (# a | b | c | d #)
liftTyped (# a | b | c | d #)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (# a | b | c | d #)
x)
  lift :: forall (m :: * -> *). Quote m => (# a | b | c | d #) -> m Exp
lift (# a | b | c | d #)
x
    = case (# a | b | c | d #)
x of
        (# a
y | | | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
1 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
4
        (# | b
y | | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
2 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
4
        (# | | c
y | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift c
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
3 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
4
        (# | | | d
y #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift d
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
4 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
4

-- | @since 2.16.0.0
instance (Lift a, Lift b, Lift c, Lift d, Lift e)
      => Lift (# a | b | c | d | e #) where
  liftTyped :: forall (m :: * -> *).
Quote m =>
(# a | b | c | d | e #) -> Code m (# a | b | c | d | e #)
liftTyped (# a | b | c | d | e #)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (# a | b | c | d | e #)
x)
  lift :: forall (m :: * -> *). Quote m => (# a | b | c | d | e #) -> m Exp
lift (# a | b | c | d | e #)
x
    = case (# a | b | c | d | e #)
x of
        (# a
y | | | | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
1 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
5
        (# | b
y | | | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
2 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
5
        (# | | c
y | | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift c
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
3 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
5
        (# | | | d
y | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift d
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
4 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
5
        (# | | | | e
y #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift e
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
5 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
5

-- | @since 2.16.0.0
instance (Lift a, Lift b, Lift c, Lift d, Lift e, Lift f)
      => Lift (# a | b | c | d | e | f #) where
  liftTyped :: forall (m :: * -> *).
Quote m =>
(# a | b | c | d | e | f #) -> Code m (# a | b | c | d | e | f #)
liftTyped (# a | b | c | d | e | f #)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (# a | b | c | d | e | f #)
x)
  lift :: forall (m :: * -> *).
Quote m =>
(# a | b | c | d | e | f #) -> m Exp
lift (# a | b | c | d | e | f #)
x
    = case (# a | b | c | d | e | f #)
x of
        (# a
y | | | | | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
1 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
6
        (# | b
y | | | | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
2 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
6
        (# | | c
y | | | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift c
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
3 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
6
        (# | | | d
y | | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift d
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
4 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
6
        (# | | | | e
y | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift e
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
5 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
6
        (# | | | | | f
y #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift f
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
6 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
6

-- | @since 2.16.0.0
instance (Lift a, Lift b, Lift c, Lift d, Lift e, Lift f, Lift g)
      => Lift (# a | b | c | d | e | f | g #) where
  liftTyped :: forall (m :: * -> *).
Quote m =>
(# a | b | c | d | e | f | g #)
-> Code m (# a | b | c | d | e | f | g #)
liftTyped (# a | b | c | d | e | f | g #)
x = forall a (m :: * -> *). Quote m => m Exp -> Code m a
unsafeCodeCoerce (forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift (# a | b | c | d | e | f | g #)
x)
  lift :: forall (m :: * -> *).
Quote m =>
(# a | b | c | d | e | f | g #) -> m Exp
lift (# a | b | c | d | e | f | g #)
x
    = case (# a | b | c | d | e | f | g #)
x of
        (# a
y | | | | | | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift a
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
1 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
7
        (# | b
y | | | | | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift b
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
2 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
7
        (# | | c
y | | | | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift c
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
3 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
7
        (# | | | d
y | | | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift d
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
4 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
7
        (# | | | | e
y | | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift e
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
5 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
7
        (# | | | | | f
y | #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift f
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
6 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
7
        (# | | | | | | g
y #) -> Exp -> Int -> Int -> Exp
UnboxedSumE forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall t (m :: * -> *). (Lift t, Quote m) => t -> m Exp
lift g
y forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
7 forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> forall (f :: * -> *) a. Applicative f => a -> f a
pure Int
7

-- TH has a special form for literal strings,
-- which we should take advantage of.
-- NB: the lhs of the rule has no args, so that
--     the rule will apply to a 'lift' all on its own
--     which happens to be the way the type checker
--     creates it.
{-# RULES "TH:liftString" lift = \s -> return (LitE (StringL s)) #-}


trueName, falseName :: Name
trueName :: Name
trueName  = NameSpace -> String -> String -> String -> Name
mkNameG NameSpace
DataName String
"ghc-prim" String
"GHC.Types" String
"True"
falseName :: Name
falseName = NameSpace -> String -> String -> String -> Name
mkNameG NameSpace
DataName String
"ghc-prim" String
"GHC.Types" String
"False"

nothingName, justName :: Name
nothingName :: Name
nothingName = NameSpace -> String -> String -> String -> Name
mkNameG NameSpace
DataName String
"base" String
"GHC.Maybe" String
"Nothing"
justName :: Name
justName    = NameSpace -> String -> String -> String -> Name
mkNameG NameSpace
DataName String
"base" String
"GHC.Maybe" String
"Just"

leftName, rightName :: Name
leftName :: Name
leftName  = NameSpace -> String -> String -> String -> Name
mkNameG NameSpace
DataName String
"base" String
"Data.Either" String
"Left"
rightName :: Name
rightName = NameSpace -> String -> String -> String -> Name
mkNameG NameSpace
DataName String
"base" String
"Data.Either" String
"Right"

nonemptyName :: Name
nonemptyName :: Name
nonemptyName = NameSpace -> String -> String -> String -> Name
mkNameG NameSpace
DataName String
"base" String
"GHC.Base" String
":|"

oneName, manyName :: Name
oneName :: Name
oneName  = NameSpace -> String -> String -> String -> Name
mkNameG NameSpace
DataName String
"ghc-prim" String
"GHC.Types" String
"One"
manyName :: Name
manyName = NameSpace -> String -> String -> String -> Name
mkNameG NameSpace
DataName String
"ghc-prim" String
"GHC.Types" String
"Many"
-----------------------------------------------------
--
--              Generic Lift implementations
--
-----------------------------------------------------

-- | 'dataToQa' is an internal utility function for constructing generic
-- conversion functions from types with 'Data' instances to various
-- quasi-quoting representations.  See the source of 'dataToExpQ' and
-- 'dataToPatQ' for two example usages: @mkCon@, @mkLit@
-- and @appQ@ are overloadable to account for different syntax for
-- expressions and patterns; @antiQ@ allows you to override type-specific
-- cases, a common usage is just @const Nothing@, which results in
-- no overloading.
dataToQa  ::  forall m a k q. (Quote m, Data a)
          =>  (Name -> k)
          ->  (Lit -> m q)
          ->  (k -> [m q] -> m q)
          ->  (forall b . Data b => b -> Maybe (m q))
          ->  a
          ->  m q
dataToQa :: forall (m :: * -> *) a k q.
(Quote m, Data a) =>
(Name -> k)
-> (Lit -> m q)
-> (k -> [m q] -> m q)
-> (forall b. Data b => b -> Maybe (m q))
-> a
-> m q
dataToQa Name -> k
mkCon Lit -> m q
mkLit k -> [m q] -> m q
appCon forall b. Data b => b -> Maybe (m q)
antiQ a
t =
    case forall b. Data b => b -> Maybe (m q)
antiQ a
t of
      Maybe (m q)
Nothing ->
          case Constr -> ConstrRep
constrRep Constr
constr of
            AlgConstr Int
_ ->
                k -> [m q] -> m q
appCon (Name -> k
mkCon Name
funOrConName) [m q]
conArgs
              where
                funOrConName :: Name
                funOrConName :: Name
funOrConName =
                    case Constr -> String
showConstr Constr
constr of
                      String
"(:)"       -> OccName -> NameFlavour -> Name
Name (String -> OccName
mkOccName String
":")
                                          (NameSpace -> PkgName -> ModName -> NameFlavour
NameG NameSpace
DataName
                                                (String -> PkgName
mkPkgName String
"ghc-prim")
                                                (String -> ModName
mkModName String
"GHC.Types"))
                      con :: String
con@String
"[]"    -> OccName -> NameFlavour -> Name
Name (String -> OccName
mkOccName String
con)
                                          (NameSpace -> PkgName -> ModName -> NameFlavour
NameG NameSpace
DataName
                                                (String -> PkgName
mkPkgName String
"ghc-prim")
                                                (String -> ModName
mkModName String
"GHC.Types"))
                      con :: String
con@(Char
'(':String
_) -> OccName -> NameFlavour -> Name
Name (String -> OccName
mkOccName String
con)
                                          (NameSpace -> PkgName -> ModName -> NameFlavour
NameG NameSpace
DataName
                                                (String -> PkgName
mkPkgName String
"ghc-prim")
                                                (String -> ModName
mkModName String
"GHC.Tuple"))

                      -- Tricky case: see Note [Data for non-algebraic types]
                      fun :: String
fun@(Char
x:String
_)   | Char -> Bool
startsVarSym Char
x Bool -> Bool -> Bool
|| Char -> Bool
startsVarId Char
x
                                  -> String -> String -> String -> Name
mkNameG_v String
tyconPkg String
tyconMod String
fun
                      String
con         -> String -> String -> String -> Name
mkNameG_d String
tyconPkg String
tyconMod String
con

                  where
                    tycon :: TyCon
                    tycon :: TyCon
tycon = (TypeRep -> TyCon
typeRepTyCon forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a. Typeable a => a -> TypeRep
typeOf) a
t

                    tyconPkg, tyconMod :: String
                    tyconPkg :: String
tyconPkg = TyCon -> String
tyConPackage TyCon
tycon
                    tyconMod :: String
tyconMod = TyCon -> String
tyConModule  TyCon
tycon

                conArgs :: [m q]
                conArgs :: [m q]
conArgs = forall a u. Data a => (forall d. Data d => d -> u) -> a -> [u]
gmapQ (forall (m :: * -> *) a k q.
(Quote m, Data a) =>
(Name -> k)
-> (Lit -> m q)
-> (k -> [m q] -> m q)
-> (forall b. Data b => b -> Maybe (m q))
-> a
-> m q
dataToQa Name -> k
mkCon Lit -> m q
mkLit k -> [m q] -> m q
appCon forall b. Data b => b -> Maybe (m q)
antiQ) a
t
            IntConstr Uniq
n ->
                Lit -> m q
mkLit forall a b. (a -> b) -> a -> b
$ Uniq -> Lit
IntegerL Uniq
n
            FloatConstr Rational
n ->
                Lit -> m q
mkLit forall a b. (a -> b) -> a -> b
$ Rational -> Lit
RationalL Rational
n
            CharConstr Char
c ->
                Lit -> m q
mkLit forall a b. (a -> b) -> a -> b
$ Char -> Lit
CharL Char
c
        where
          constr :: Constr
          constr :: Constr
constr = forall a. Data a => a -> Constr
toConstr a
t

      Just m q
y -> m q
y


{- Note [Data for non-algebraic types]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Class Data was originally intended for algebraic data types.  But
it is possible to use it for abstract types too.  For example, in
package `text` we find

  instance Data Text where
    ...
    toConstr _ = packConstr

  packConstr :: Constr
  packConstr = mkConstr textDataType "pack" [] Prefix

Here `packConstr` isn't a real data constructor, it's an ordinary
function.  Two complications

* In such a case, we must take care to build the Name using
  mkNameG_v (for values), not mkNameG_d (for data constructors).
  See #10796.

* The pseudo-constructor is named only by its string, here "pack".
  But 'dataToQa' needs the TyCon of its defining module, and has
  to assume it's defined in the same module as the TyCon itself.
  But nothing enforces that; #12596 shows what goes wrong if
  "pack" is defined in a different module than the data type "Text".
  -}

-- | 'dataToExpQ' converts a value to a 'Exp' representation of the
-- same value, in the SYB style. It is generalized to take a function
-- override type-specific cases; see 'liftData' for a more commonly
-- used variant.
dataToExpQ  ::  (Quote m, Data a)
            =>  (forall b . Data b => b -> Maybe (m Exp))
            ->  a
            ->  m Exp
dataToExpQ :: forall (m :: * -> *) a.
(Quote m, Data a) =>
(forall b. Data b => b -> Maybe (m Exp)) -> a -> m Exp
dataToExpQ = forall (m :: * -> *) a k q.
(Quote m, Data a) =>
(Name -> k)
-> (Lit -> m q)
-> (k -> [m q] -> m q)
-> (forall b. Data b => b -> Maybe (m q))
-> a
-> m q
dataToQa forall {m :: * -> *}. Monad m => Name -> m Exp
varOrConE forall {m :: * -> *}. Monad m => Lit -> m Exp
litE (forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl forall {m :: * -> *}. Monad m => m Exp -> m Exp -> m Exp
appE)
    where
          -- Make sure that VarE is used if the Constr value relies on a
          -- function underneath the surface (instead of a constructor).
          -- See #10796.
          varOrConE :: Name -> m Exp
varOrConE Name
s =
            case Name -> Maybe NameSpace
nameSpace Name
s of
                 Just NameSpace
VarName  -> forall (m :: * -> *) a. Monad m => a -> m a
return (Name -> Exp
VarE Name
s)
                 Just NameSpace
DataName -> forall (m :: * -> *) a. Monad m => a -> m a
return (Name -> Exp
ConE Name
s)
                 Maybe NameSpace
_ -> forall a. HasCallStack => String -> a
error forall a b. (a -> b) -> a -> b
$ String
"Can't construct an expression from name "
                           forall a. [a] -> [a] -> [a]
++ Name -> String
showName Name
s
          appE :: m Exp -> m Exp -> m Exp
appE m Exp
x m Exp
y = do { Exp
a <- m Exp
x; Exp
b <- m Exp
y; forall (m :: * -> *) a. Monad m => a -> m a
return (Exp -> Exp -> Exp
AppE Exp
a Exp
b)}
          litE :: Lit -> m Exp
litE Lit
c = forall (m :: * -> *) a. Monad m => a -> m a
return (Lit -> Exp
LitE Lit
c)

-- | 'liftData' is a variant of 'lift' in the 'Lift' type class which
-- works for any type with a 'Data' instance.
liftData :: (Quote m, Data a) => a -> m Exp
liftData :: forall (m :: * -> *) a. (Quote m, Data a) => a -> m Exp
liftData = forall (m :: * -> *) a.
(Quote m, Data a) =>
(forall b. Data b => b -> Maybe (m Exp)) -> a -> m Exp
dataToExpQ (forall a b. a -> b -> a
const forall a. Maybe a
Nothing)

-- | 'dataToPatQ' converts a value to a 'Pat' representation of the same
-- value, in the SYB style. It takes a function to handle type-specific cases,
-- alternatively, pass @const Nothing@ to get default behavior.
dataToPatQ  ::  (Quote m, Data a)
            =>  (forall b . Data b => b -> Maybe (m Pat))
            ->  a
            ->  m Pat
dataToPatQ :: forall (m :: * -> *) a.
(Quote m, Data a) =>
(forall b. Data b => b -> Maybe (m Pat)) -> a -> m Pat
dataToPatQ = forall (m :: * -> *) a k q.
(Quote m, Data a) =>
(Name -> k)
-> (Lit -> m q)
-> (k -> [m q] -> m q)
-> (forall b. Data b => b -> Maybe (m q))
-> a
-> m q
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-----------------------------------------------------
--              Names and uniques
-----------------------------------------------------

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-- | Obtained from 'reifyModule' and 'Language.Haskell.TH.Lib.thisModule'.
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mkModName :: String -> ModName
mkModName :: String -> ModName
mkModName String
s = String -> ModName
ModName String
s

modString :: ModName -> String
modString :: ModName -> String
modString (ModName String
m) = String
m


mkPkgName :: String -> PkgName
mkPkgName :: String -> PkgName
mkPkgName String
s = String -> PkgName
PkgName String
s

pkgString :: PkgName -> String
pkgString :: PkgName -> String
pkgString (PkgName String
m) = String
m


-----------------------------------------------------
--              OccName
-----------------------------------------------------

mkOccName :: String -> OccName
mkOccName :: String -> OccName
mkOccName String
s = String -> OccName
OccName String
s

occString :: OccName -> String
occString :: OccName -> String
occString (OccName String
occ) = String
occ


-----------------------------------------------------
--               Names
-----------------------------------------------------
--
-- For "global" names ('NameG') we need a totally unique name,
-- so we must include the name-space of the thing
--
-- For unique-numbered things ('NameU'), we've got a unique reference
-- anyway, so no need for name space
--
-- For dynamically bound thing ('NameS') we probably want them to
-- in a context-dependent way, so again we don't want the name
-- space.  For example:
--
-- > let v = mkName "T" in [| data $v = $v |]
--
-- Here we use the same Name for both type constructor and data constructor
--
--
-- NameL and NameG are bound *outside* the TH syntax tree
-- either globally (NameG) or locally (NameL). Ex:
--
-- > f x = $(h [| (map, x) |])
--
-- The 'map' will be a NameG, and 'x' wil be a NameL
--
-- These Names should never appear in a binding position in a TH syntax tree

{- $namecapture #namecapture#
Much of 'Name' API is concerned with the problem of /name capture/, which
can be seen in the following example.

> f expr = [| let x = 0 in $expr |]
> ...
> g x = $( f [| x |] )
> h y = $( f [| y |] )

A naive desugaring of this would yield:

> g x = let x = 0 in x
> h y = let x = 0 in y

All of a sudden, @g@ and @h@ have different meanings! In this case,
we say that the @x@ in the RHS of @g@ has been /captured/
by the binding of @x@ in @f@.

What we actually want is for the @x@ in @f@ to be distinct from the
@x@ in @g@, so we get the following desugaring:

> g x = let x' = 0 in x
> h y = let x' = 0 in y

which avoids name capture as desired.

In the general case, we say that a @Name@ can be captured if
the thing it refers to can be changed by adding new declarations.
-}

{- |
An abstract type representing names in the syntax tree.

'Name's can be constructed in several ways, which come with different
name-capture guarantees (see "Language.Haskell.TH.Syntax#namecapture" for
an explanation of name capture):

  * the built-in syntax @'f@ and @''T@ can be used to construct names,
    The expression @'f@ gives a @Name@ which refers to the value @f@
    currently in scope, and @''T@ gives a @Name@ which refers to the
    type @T@ currently in scope. These names can never be captured.

  * 'lookupValueName' and 'lookupTypeName' are similar to @'f@ and
     @''T@ respectively, but the @Name@s are looked up at the point
     where the current splice is being run. These names can never be
     captured.

  * 'newName' monadically generates a new name, which can never
     be captured.

  * 'mkName' generates a capturable name.

Names constructed using @newName@ and @mkName@ may be used in bindings
(such as @let x = ...@ or @\x -> ...@), but names constructed using
@lookupValueName@, @lookupTypeName@, @'f@, @''T@ may not.
-}
data Name = Name OccName NameFlavour deriving (Typeable Name
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instance Ord Name where
    -- check if unique is different before looking at strings
  (Name OccName
o1 NameFlavour
f1) compare :: Name -> Name -> Ordering
`compare` (Name OccName
o2 NameFlavour
f2) = (NameFlavour
f1 forall a. Ord a => a -> a -> Ordering
`compare` NameFlavour
f2)   Ordering -> Ordering -> Ordering
`thenCmp`
                                        (OccName
o1 forall a. Ord a => a -> a -> Ordering
`compare` OccName
o2)

data NameFlavour
  = NameS           -- ^ An unqualified name; dynamically bound
  | NameQ ModName   -- ^ A qualified name; dynamically bound
  | NameU !Uniq     -- ^ A unique local name
  | NameL !Uniq     -- ^ Local name bound outside of the TH AST
  | NameG NameSpace PkgName ModName -- ^ Global name bound outside of the TH AST:
                -- An original name (occurrences only, not binders)
                -- Need the namespace too to be sure which
                -- thing we are naming
  deriving ( Typeable NameFlavour
NameFlavour -> DataType
NameFlavour -> Constr
(forall b. Data b => b -> b) -> NameFlavour -> NameFlavour
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dataTypeOf :: NameFlavour -> DataType
$cdataTypeOf :: NameFlavour -> DataType
toConstr :: NameFlavour -> Constr
$ctoConstr :: NameFlavour -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c NameFlavour
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c NameFlavour
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> NameFlavour -> c NameFlavour
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> NameFlavour -> c NameFlavour
Data, NameFlavour -> NameFlavour -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: NameFlavour -> NameFlavour -> Bool
$c/= :: NameFlavour -> NameFlavour -> Bool
== :: NameFlavour -> NameFlavour -> Bool
$c== :: NameFlavour -> NameFlavour -> Bool
Eq, Eq NameFlavour
NameFlavour -> NameFlavour -> Bool
NameFlavour -> NameFlavour -> Ordering
NameFlavour -> NameFlavour -> NameFlavour
forall a.
Eq a
-> (a -> a -> Ordering)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> a)
-> (a -> a -> a)
-> Ord a
min :: NameFlavour -> NameFlavour -> NameFlavour
$cmin :: NameFlavour -> NameFlavour -> NameFlavour
max :: NameFlavour -> NameFlavour -> NameFlavour
$cmax :: NameFlavour -> NameFlavour -> NameFlavour
>= :: NameFlavour -> NameFlavour -> Bool
$c>= :: NameFlavour -> NameFlavour -> Bool
> :: NameFlavour -> NameFlavour -> Bool
$c> :: NameFlavour -> NameFlavour -> Bool
<= :: NameFlavour -> NameFlavour -> Bool
$c<= :: NameFlavour -> NameFlavour -> Bool
< :: NameFlavour -> NameFlavour -> Bool
$c< :: NameFlavour -> NameFlavour -> Bool
compare :: NameFlavour -> NameFlavour -> Ordering
$ccompare :: NameFlavour -> NameFlavour -> Ordering
Ord, Int -> NameFlavour -> ShowS
[NameFlavour] -> ShowS
NameFlavour -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [NameFlavour] -> ShowS
$cshowList :: [NameFlavour] -> ShowS
show :: NameFlavour -> String
$cshow :: NameFlavour -> String
showsPrec :: Int -> NameFlavour -> ShowS
$cshowsPrec :: Int -> NameFlavour -> ShowS
Show, forall x. Rep NameFlavour x -> NameFlavour
forall x. NameFlavour -> Rep NameFlavour x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
$cto :: forall x. Rep NameFlavour x -> NameFlavour
$cfrom :: forall x. NameFlavour -> Rep NameFlavour x
Generic )

data NameSpace = VarName        -- ^ Variables
               | DataName       -- ^ Data constructors
               | TcClsName      -- ^ Type constructors and classes; Haskell has them
                                -- in the same name space for now.
               deriving( NameSpace -> NameSpace -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: NameSpace -> NameSpace -> Bool
$c/= :: NameSpace -> NameSpace -> Bool
== :: NameSpace -> NameSpace -> Bool
$c== :: NameSpace -> NameSpace -> Bool
Eq, Eq NameSpace
NameSpace -> NameSpace -> Bool
NameSpace -> NameSpace -> Ordering
NameSpace -> NameSpace -> NameSpace
forall a.
Eq a
-> (a -> a -> Ordering)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> a)
-> (a -> a -> a)
-> Ord a
min :: NameSpace -> NameSpace -> NameSpace
$cmin :: NameSpace -> NameSpace -> NameSpace
max :: NameSpace -> NameSpace -> NameSpace
$cmax :: NameSpace -> NameSpace -> NameSpace
>= :: NameSpace -> NameSpace -> Bool
$c>= :: NameSpace -> NameSpace -> Bool
> :: NameSpace -> NameSpace -> Bool
$c> :: NameSpace -> NameSpace -> Bool
<= :: NameSpace -> NameSpace -> Bool
$c<= :: NameSpace -> NameSpace -> Bool
< :: NameSpace -> NameSpace -> Bool
$c< :: NameSpace -> NameSpace -> Bool
compare :: NameSpace -> NameSpace -> Ordering
$ccompare :: NameSpace -> NameSpace -> Ordering
Ord, Int -> NameSpace -> ShowS
[NameSpace] -> ShowS
NameSpace -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [NameSpace] -> ShowS
$cshowList :: [NameSpace] -> ShowS
show :: NameSpace -> String
$cshow :: NameSpace -> String
showsPrec :: Int -> NameSpace -> ShowS
$cshowsPrec :: Int -> NameSpace -> ShowS
Show, Typeable NameSpace
NameSpace -> DataType
NameSpace -> Constr
(forall b. Data b => b -> b) -> NameSpace -> NameSpace
forall a.
Typeable a
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> a -> c a)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c a)
-> (a -> Constr)
-> (a -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c a))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c a))
-> ((forall b. Data b => b -> b) -> a -> a)
-> (forall r r'.
    (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall r r'.
    (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall u. (forall d. Data d => d -> u) -> a -> [u])
-> (forall u. Int -> (forall d. Data d => d -> u) -> a -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> Data a
forall u. Int -> (forall d. Data d => d -> u) -> NameSpace -> u
forall u. (forall d. Data d => d -> u) -> NameSpace -> [u]
forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> NameSpace -> r
forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> NameSpace -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> NameSpace -> m NameSpace
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> NameSpace -> m NameSpace
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c NameSpace
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> NameSpace -> c NameSpace
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c NameSpace)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c NameSpace)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> NameSpace -> m NameSpace
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> NameSpace -> m NameSpace
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> NameSpace -> m NameSpace
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> NameSpace -> m NameSpace
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> NameSpace -> m NameSpace
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> NameSpace -> m NameSpace
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> NameSpace -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> NameSpace -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> NameSpace -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> NameSpace -> [u]
gmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> NameSpace -> r
$cgmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> NameSpace -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> NameSpace -> r
$cgmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> NameSpace -> r
gmapT :: (forall b. Data b => b -> b) -> NameSpace -> NameSpace
$cgmapT :: (forall b. Data b => b -> b) -> NameSpace -> NameSpace
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c NameSpace)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c NameSpace)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c NameSpace)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c NameSpace)
dataTypeOf :: NameSpace -> DataType
$cdataTypeOf :: NameSpace -> DataType
toConstr :: NameSpace -> Constr
$ctoConstr :: NameSpace -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c NameSpace
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c NameSpace
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> NameSpace -> c NameSpace
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> NameSpace -> c NameSpace
Data, forall x. Rep NameSpace x -> NameSpace
forall x. NameSpace -> Rep NameSpace x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
$cto :: forall x. Rep NameSpace x -> NameSpace
$cfrom :: forall x. NameSpace -> Rep NameSpace x
Generic )

-- | @Uniq@ is used by GHC to distinguish names from each other.
type Uniq = Integer

-- | The name without its module prefix.
--
-- ==== __Examples__
--
-- >>> nameBase ''Data.Either.Either
-- "Either"
-- >>> nameBase (mkName "foo")
-- "foo"
-- >>> nameBase (mkName "Module.foo")
-- "foo"
nameBase :: Name -> String
nameBase :: Name -> String
nameBase (Name OccName
occ NameFlavour
_) = OccName -> String
occString OccName
occ

-- | Module prefix of a name, if it exists.
--
-- ==== __Examples__
--
-- >>> nameModule ''Data.Either.Either
-- Just "Data.Either"
-- >>> nameModule (mkName "foo")
-- Nothing
-- >>> nameModule (mkName "Module.foo")
-- Just "Module"
nameModule :: Name -> Maybe String
nameModule :: Name -> Maybe String
nameModule (Name OccName
_ (NameQ ModName
m))     = forall a. a -> Maybe a
Just (ModName -> String
modString ModName
m)
nameModule (Name OccName
_ (NameG NameSpace
_ PkgName
_ ModName
m)) = forall a. a -> Maybe a
Just (ModName -> String
modString ModName
m)
nameModule Name
_                      = forall a. Maybe a
Nothing

-- | A name's package, if it exists.
--
-- ==== __Examples__
--
-- >>> namePackage ''Data.Either.Either
-- Just "base"
-- >>> namePackage (mkName "foo")
-- Nothing
-- >>> namePackage (mkName "Module.foo")
-- Nothing
namePackage :: Name -> Maybe String
namePackage :: Name -> Maybe String
namePackage (Name OccName
_ (NameG NameSpace
_ PkgName
p ModName
_)) = forall a. a -> Maybe a
Just (PkgName -> String
pkgString PkgName
p)
namePackage Name
_                      = forall a. Maybe a
Nothing

-- | Returns whether a name represents an occurrence of a top-level variable
-- ('VarName'), data constructor ('DataName'), type constructor, or type class
-- ('TcClsName'). If we can't be sure, it returns 'Nothing'.
--
-- ==== __Examples__
--
-- >>> nameSpace 'Prelude.id
-- Just VarName
-- >>> nameSpace (mkName "id")
-- Nothing -- only works for top-level variable names
-- >>> nameSpace 'Data.Maybe.Just
-- Just DataName
-- >>> nameSpace ''Data.Maybe.Maybe
-- Just TcClsName
-- >>> nameSpace ''Data.Ord.Ord
-- Just TcClsName
nameSpace :: Name -> Maybe NameSpace
nameSpace :: Name -> Maybe NameSpace
nameSpace (Name OccName
_ (NameG NameSpace
ns PkgName
_ ModName
_)) = forall a. a -> Maybe a
Just NameSpace
ns
nameSpace Name
_                       = forall a. Maybe a
Nothing

{- |
Generate a capturable name. Occurrences of such names will be
resolved according to the Haskell scoping rules at the occurrence
site.

For example:

> f = [| pi + $(varE (mkName "pi")) |]
> ...
> g = let pi = 3 in $f

In this case, @g@ is desugared to

> g = Prelude.pi + 3

Note that @mkName@ may be used with qualified names:

> mkName "Prelude.pi"

See also 'Language.Haskell.TH.Lib.dyn' for a useful combinator. The above example could
be rewritten using 'Language.Haskell.TH.Lib.dyn' as

> f = [| pi + $(dyn "pi") |]
-}
mkName :: String -> Name
-- The string can have a '.', thus "Foo.baz",
-- giving a dynamically-bound qualified name,
-- in which case we want to generate a NameQ
--
-- Parse the string to see if it has a "." in it
-- so we know whether to generate a qualified or unqualified name
-- It's a bit tricky because we need to parse
--
-- > Foo.Baz.x   as    Qual Foo.Baz x
--
-- So we parse it from back to front
mkName :: String -> Name
mkName String
str
  = String -> String -> Name
split [] (forall a. [a] -> [a]
reverse String
str)
  where
    split :: String -> String -> Name
split String
occ []        = OccName -> NameFlavour -> Name
Name (String -> OccName
mkOccName String
occ) NameFlavour
NameS
    split String
occ (Char
'.':String
rev) | Bool -> Bool
not (forall (t :: * -> *) a. Foldable t => t a -> Bool
null String
occ)
                        , String -> Bool
is_rev_mod_name String
rev
                        = OccName -> NameFlavour -> Name
Name (String -> OccName
mkOccName String
occ) (ModName -> NameFlavour
NameQ (String -> ModName
mkModName (forall a. [a] -> [a]
reverse String
rev)))
        -- The 'not (null occ)' guard ensures that
        --      mkName "&." = Name "&." NameS
        -- The 'is_rev_mod' guards ensure that
        --      mkName ".&" = Name ".&" NameS
        --      mkName "^.." = Name "^.." NameS      -- #8633
        --      mkName "Data.Bits..&" = Name ".&" (NameQ "Data.Bits")
        -- This rather bizarre case actually happened; (.&.) is in Data.Bits
    split String
occ (Char
c:String
rev)   = String -> String -> Name
split (Char
cforall a. a -> [a] -> [a]
:String
occ) String
rev

    -- Recognises a reversed module name xA.yB.C,
    -- with at least one component,
    -- and each component looks like a module name
    --   (i.e. non-empty, starts with capital, all alpha)
    is_rev_mod_name :: String -> Bool
is_rev_mod_name String
rev_mod_str
      | (String
compt, String
rest) <- forall a. (a -> Bool) -> [a] -> ([a], [a])
break (forall a. Eq a => a -> a -> Bool
== Char
'.') String
rev_mod_str
      , Bool -> Bool
not (forall (t :: * -> *) a. Foldable t => t a -> Bool
null String
compt), Char -> Bool
isUpper (forall a. [a] -> a
last String
compt), forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
all Char -> Bool
is_mod_char String
compt
      = case String
rest of
          []             -> Bool
True
          (Char
_dot : String
rest') -> String -> Bool
is_rev_mod_name String
rest'
      | Bool
otherwise
      = Bool
False

    is_mod_char :: Char -> Bool
is_mod_char Char
c = Char -> Bool
isAlphaNum Char
c Bool -> Bool -> Bool
|| Char
c forall a. Eq a => a -> a -> Bool
== Char
'_' Bool -> Bool -> Bool
|| Char
c forall a. Eq a => a -> a -> Bool
== Char
'\''

-- | Only used internally
mkNameU :: String -> Uniq -> Name
mkNameU :: String -> Uniq -> Name
mkNameU String
s Uniq
u = OccName -> NameFlavour -> Name
Name (String -> OccName
mkOccName String
s) (Uniq -> NameFlavour
NameU Uniq
u)

-- | Only used internally
mkNameL :: String -> Uniq -> Name
mkNameL :: String -> Uniq -> Name
mkNameL String
s Uniq
u = OccName -> NameFlavour -> Name
Name (String -> OccName
mkOccName String
s) (Uniq -> NameFlavour
NameL Uniq
u)

-- | Used for 'x etc, but not available to the programmer
mkNameG :: NameSpace -> String -> String -> String -> Name
mkNameG :: NameSpace -> String -> String -> String -> Name
mkNameG NameSpace
ns String
pkg String
modu String
occ
  = OccName -> NameFlavour -> Name
Name (String -> OccName
mkOccName String
occ) (NameSpace -> PkgName -> ModName -> NameFlavour
NameG NameSpace
ns (String -> PkgName
mkPkgName String
pkg) (String -> ModName
mkModName String
modu))

mkNameS :: String -> Name
mkNameS :: String -> Name
mkNameS String
n = OccName -> NameFlavour -> Name
Name (String -> OccName
mkOccName String
n) NameFlavour
NameS

mkNameG_v, mkNameG_tc, mkNameG_d :: String -> String -> String -> Name
mkNameG_v :: String -> String -> String -> Name
mkNameG_v  = NameSpace -> String -> String -> String -> Name
mkNameG NameSpace
VarName
mkNameG_tc :: String -> String -> String -> Name
mkNameG_tc = NameSpace -> String -> String -> String -> Name
mkNameG NameSpace
TcClsName
mkNameG_d :: String -> String -> String -> Name
mkNameG_d  = NameSpace -> String -> String -> String -> Name
mkNameG NameSpace
DataName

data NameIs = Alone | Applied | Infix

showName :: Name -> String
showName :: Name -> String
showName = NameIs -> Name -> String
showName' NameIs
Alone

showName' :: NameIs -> Name -> String
showName' :: NameIs -> Name -> String
showName' NameIs
ni Name
nm
 = case NameIs
ni of
       NameIs
Alone        -> String
nms
       NameIs
Applied
        | Bool
pnam      -> String
nms
        | Bool
otherwise -> String
"(" forall a. [a] -> [a] -> [a]
++ String
nms forall a. [a] -> [a] -> [a]
++ String
")"
       NameIs
Infix
        | Bool
pnam      -> String
"`" forall a. [a] -> [a] -> [a]
++ String
nms forall a. [a] -> [a] -> [a]
++ String
"`"
        | Bool
otherwise -> String
nms
    where
        -- For now, we make the NameQ and NameG print the same, even though
        -- NameQ is a qualified name (so what it means depends on what the
        -- current scope is), and NameG is an original name (so its meaning
        -- should be independent of what's in scope.
        -- We may well want to distinguish them in the end.
        -- Ditto NameU and NameL
        nms :: String
nms = case Name
nm of
                    Name OccName
occ NameFlavour
NameS         -> OccName -> String
occString OccName
occ
                    Name OccName
occ (NameQ ModName
m)     -> ModName -> String
modString ModName
m forall a. [a] -> [a] -> [a]
++ String
"." forall a. [a] -> [a] -> [a]
++ OccName -> String
occString OccName
occ
                    Name OccName
occ (NameG NameSpace
_ PkgName
_ ModName
m) -> ModName -> String
modString ModName
m forall a. [a] -> [a] -> [a]
++ String
"." forall a. [a] -> [a] -> [a]
++ OccName -> String
occString OccName
occ
                    Name OccName
occ (NameU Uniq
u)     -> OccName -> String
occString OccName
occ forall a. [a] -> [a] -> [a]
++ String
"_" forall a. [a] -> [a] -> [a]
++ forall a. Show a => a -> String
show Uniq
u
                    Name OccName
occ (NameL Uniq
u)     -> OccName -> String
occString OccName
occ forall a. [a] -> [a] -> [a]
++ String
"_" forall a. [a] -> [a] -> [a]
++ forall a. Show a => a -> String
show Uniq
u

        pnam :: Bool
pnam = String -> Bool
classify String
nms

        -- True if we are function style, e.g. f, [], (,)
        -- False if we are operator style, e.g. +, :+
        classify :: String -> Bool
classify String
"" = Bool
False -- shouldn't happen; . operator is handled below
        classify (Char
x:String
xs) | Char -> Bool
isAlpha Char
x Bool -> Bool -> Bool
|| (Char
x forall (t :: * -> *) a. (Foldable t, Eq a) => a -> t a -> Bool
`elem` String
"_[]()") =
                            case forall a. (a -> Bool) -> [a] -> [a]
dropWhile (forall a. Eq a => a -> a -> Bool
/=Char
'.') String
xs of
                                  (Char
_:String
xs') -> String -> Bool
classify String
xs'
                                  []      -> Bool
True
                        | Bool
otherwise = Bool
False

instance Show Name where
  show :: Name -> String
show = Name -> String
showName

-- Tuple data and type constructors
-- | Tuple data constructor
tupleDataName :: Int -> Name
-- | Tuple type constructor
tupleTypeName :: Int -> Name

tupleDataName :: Int -> Name
tupleDataName Int
n = Int -> NameSpace -> Bool -> Name
mk_tup_name Int
n NameSpace
DataName  Bool
True
tupleTypeName :: Int -> Name
tupleTypeName Int
n = Int -> NameSpace -> Bool -> Name
mk_tup_name Int
n NameSpace
TcClsName Bool
True

-- Unboxed tuple data and type constructors
-- | Unboxed tuple data constructor
unboxedTupleDataName :: Int -> Name
-- | Unboxed tuple type constructor
unboxedTupleTypeName :: Int -> Name

unboxedTupleDataName :: Int -> Name
unboxedTupleDataName Int
n = Int -> NameSpace -> Bool -> Name
mk_tup_name Int
n NameSpace
DataName  Bool
False
unboxedTupleTypeName :: Int -> Name
unboxedTupleTypeName Int
n = Int -> NameSpace -> Bool -> Name
mk_tup_name Int
n NameSpace
TcClsName Bool
False

mk_tup_name :: Int -> NameSpace -> Bool -> Name
mk_tup_name :: Int -> NameSpace -> Bool -> Name
mk_tup_name Int
n NameSpace
space Bool
boxed
  = OccName -> NameFlavour -> Name
Name (String -> OccName
mkOccName String
tup_occ) (NameSpace -> PkgName -> ModName -> NameFlavour
NameG NameSpace
space (String -> PkgName
mkPkgName String
"ghc-prim") ModName
tup_mod)
  where
    withParens :: ShowS
withParens String
thing
      | Bool
boxed     = String
"("  forall a. [a] -> [a] -> [a]
++ String
thing forall a. [a] -> [a] -> [a]
++ String
")"
      | Bool
otherwise = String
"(#" forall a. [a] -> [a] -> [a]
++ String
thing forall a. [a] -> [a] -> [a]
++ String
"#)"
    tup_occ :: String
tup_occ | Int
n forall a. Eq a => a -> a -> Bool
== Int
1    = if Bool
boxed then String
"Solo" else String
"Solo#"
            | Bool
otherwise = ShowS
withParens (forall a. Int -> a -> [a]
replicate Int
n_commas Char
',')
    n_commas :: Int
n_commas = Int
n forall a. Num a => a -> a -> a
- Int
1
    tup_mod :: ModName
tup_mod  = String -> ModName
mkModName String
"GHC.Tuple"

-- Unboxed sum data and type constructors
-- | Unboxed sum data constructor
unboxedSumDataName :: SumAlt -> SumArity -> Name
-- | Unboxed sum type constructor
unboxedSumTypeName :: SumArity -> Name

unboxedSumDataName :: Int -> Int -> Name
unboxedSumDataName Int
alt Int
arity
  | Int
alt forall a. Ord a => a -> a -> Bool
> Int
arity
  = forall a. HasCallStack => String -> a
error forall a b. (a -> b) -> a -> b
$ String
prefix forall a. [a] -> [a] -> [a]
++ String
"Index out of bounds." forall a. [a] -> [a] -> [a]
++ String
debug_info

  | Int
alt forall a. Ord a => a -> a -> Bool
<= Int
0
  = forall a. HasCallStack => String -> a
error forall a b. (a -> b) -> a -> b
$ String
prefix forall a. [a] -> [a] -> [a]
++ String
"Alt must be > 0." forall a. [a] -> [a] -> [a]
++ String
debug_info

  | Int
arity forall a. Ord a => a -> a -> Bool
< Int
2
  = forall a. HasCallStack => String -> a
error forall a b. (a -> b) -> a -> b
$ String
prefix forall a. [a] -> [a] -> [a]
++ String
"Arity must be >= 2." forall a. [a] -> [a] -> [a]
++ String
debug_info

  | Bool
otherwise
  = OccName -> NameFlavour -> Name
Name (String -> OccName
mkOccName String
sum_occ)
         (NameSpace -> PkgName -> ModName -> NameFlavour
NameG NameSpace
DataName (String -> PkgName
mkPkgName String
"ghc-prim") (String -> ModName
mkModName String
"GHC.Prim"))

  where
    prefix :: String
prefix     = String
"unboxedSumDataName: "
    debug_info :: String
debug_info = String
" (alt: " forall a. [a] -> [a] -> [a]
++ forall a. Show a => a -> String
show Int
alt forall a. [a] -> [a] -> [a]
++ String
", arity: " forall a. [a] -> [a] -> [a]
++ forall a. Show a => a -> String
show Int
arity forall a. [a] -> [a] -> [a]
++ String
")"

    -- Synced with the definition of mkSumDataConOcc in GHC.Builtin.Types
    sum_occ :: String
sum_occ = Char
'(' forall a. a -> [a] -> [a]
: Char
'#' forall a. a -> [a] -> [a]
: Int -> String
bars Int
nbars_before forall a. [a] -> [a] -> [a]
++ Char
'_' forall a. a -> [a] -> [a]
: Int -> String
bars Int
nbars_after forall a. [a] -> [a] -> [a]
++ String
"#)"
    bars :: Int -> String
bars Int
i = forall a. Int -> a -> [a]
replicate Int
i Char
'|'
    nbars_before :: Int
nbars_before = Int
alt forall a. Num a => a -> a -> a
- Int
1
    nbars_after :: Int
nbars_after  = Int
arity forall a. Num a => a -> a -> a
- Int
alt

unboxedSumTypeName :: Int -> Name
unboxedSumTypeName Int
arity
  | Int
arity forall a. Ord a => a -> a -> Bool
< Int
2
  = forall a. HasCallStack => String -> a
error forall a b. (a -> b) -> a -> b
$ String
"unboxedSumTypeName: Arity must be >= 2."
         forall a. [a] -> [a] -> [a]
++ String
" (arity: " forall a. [a] -> [a] -> [a]
++ forall a. Show a => a -> String
show Int
arity forall a. [a] -> [a] -> [a]
++ String
")"

  | Bool
otherwise
  = OccName -> NameFlavour -> Name
Name (String -> OccName
mkOccName String
sum_occ)
         (NameSpace -> PkgName -> ModName -> NameFlavour
NameG NameSpace
TcClsName (String -> PkgName
mkPkgName String
"ghc-prim") (String -> ModName
mkModName String
"GHC.Prim"))

  where
    -- Synced with the definition of mkSumTyConOcc in GHC.Builtin.Types
    sum_occ :: String
sum_occ = Char
'(' forall a. a -> [a] -> [a]
: Char
'#' forall a. a -> [a] -> [a]
: forall a. Int -> a -> [a]
replicate (Int
arity forall a. Num a => a -> a -> a
- Int
1) Char
'|' forall a. [a] -> [a] -> [a]
++ String
"#)"

-----------------------------------------------------
--              Locations
-----------------------------------------------------

data Loc
  = Loc { Loc -> String
loc_filename :: String
        , Loc -> String
loc_package  :: String
        , Loc -> String
loc_module   :: String
        , Loc -> CharPos
loc_start    :: CharPos
        , Loc -> CharPos
loc_end      :: CharPos }
   deriving( Int -> Loc -> ShowS
[Loc] -> ShowS
Loc -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [Loc] -> ShowS
$cshowList :: [Loc] -> ShowS
show :: Loc -> String
$cshow :: Loc -> String
showsPrec :: Int -> Loc -> ShowS
$cshowsPrec :: Int -> Loc -> ShowS
Show, Loc -> Loc -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Loc -> Loc -> Bool
$c/= :: Loc -> Loc -> Bool
== :: Loc -> Loc -> Bool
$c== :: Loc -> Loc -> Bool
Eq, Eq Loc
Loc -> Loc -> Bool
Loc -> Loc -> Ordering
Loc -> Loc -> Loc
forall a.
Eq a
-> (a -> a -> Ordering)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> a)
-> (a -> a -> a)
-> Ord a
min :: Loc -> Loc -> Loc
$cmin :: Loc -> Loc -> Loc
max :: Loc -> Loc -> Loc
$cmax :: Loc -> Loc -> Loc
>= :: Loc -> Loc -> Bool
$c>= :: Loc -> Loc -> Bool
> :: Loc -> Loc -> Bool
$c> :: Loc -> Loc -> Bool
<= :: Loc -> Loc -> Bool
$c<= :: Loc -> Loc -> Bool
< :: Loc -> Loc -> Bool
$c< :: Loc -> Loc -> Bool
compare :: Loc -> Loc -> Ordering
$ccompare :: Loc -> Loc -> Ordering
Ord, Typeable Loc
Loc -> DataType
Loc -> Constr
(forall b. Data b => b -> b) -> Loc -> Loc
forall a.
Typeable a
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> a -> c a)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c a)
-> (a -> Constr)
-> (a -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c a))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c a))
-> ((forall b. Data b => b -> b) -> a -> a)
-> (forall r r'.
    (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall r r'.
    (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall u. (forall d. Data d => d -> u) -> a -> [u])
-> (forall u. Int -> (forall d. Data d => d -> u) -> a -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> Data a
forall u. Int -> (forall d. Data d => d -> u) -> Loc -> u
forall u. (forall d. Data d => d -> u) -> Loc -> [u]
forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Loc -> r
forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Loc -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Loc -> m Loc
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Loc -> m Loc
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Loc
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Loc -> c Loc
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Loc)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Loc)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Loc -> m Loc
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Loc -> m Loc
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Loc -> m Loc
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Loc -> m Loc
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Loc -> m Loc
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Loc -> m Loc
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Loc -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Loc -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> Loc -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> Loc -> [u]
gmapQr :: forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Loc -> r
$cgmapQr :: forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Loc -> r
gmapQl :: forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Loc -> r
$cgmapQl :: forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Loc -> r
gmapT :: (forall b. Data b => b -> b) -> Loc -> Loc
$cgmapT :: (forall b. Data b => b -> b) -> Loc -> Loc
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Loc)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Loc)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Loc)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Loc)
dataTypeOf :: Loc -> DataType
$cdataTypeOf :: Loc -> DataType
toConstr :: Loc -> Constr
$ctoConstr :: Loc -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Loc
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Loc
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Loc -> c Loc
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Loc -> c Loc
Data, forall x. Rep Loc x -> Loc
forall x. Loc -> Rep Loc x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
$cto :: forall x. Rep Loc x -> Loc
$cfrom :: forall x. Loc -> Rep Loc x
Generic )

type CharPos = (Int, Int)       -- ^ Line and character position


-----------------------------------------------------
--
--      The Info returned by reification
--
-----------------------------------------------------

-- | Obtained from 'reify' in the 'Q' Monad.
data Info
  =
  -- | A class, with a list of its visible instances
  ClassI
      Dec
      [InstanceDec]

  -- | A class method
  | ClassOpI
       Name
       Type
       ParentName

  -- | A \"plain\" type constructor. \"Fancier\" type constructors are returned
  -- using 'PrimTyConI' or 'FamilyI' as appropriate. At present, this reified
  -- declaration will never have derived instances attached to it (if you wish
  -- to check for an instance, see 'reifyInstances').
  | TyConI
        Dec

  -- | A type or data family, with a list of its visible instances. A closed
  -- type family is returned with 0 instances.
  | FamilyI
        Dec
        [InstanceDec]

  -- | A \"primitive\" type constructor, which can't be expressed with a 'Dec'.
  -- Examples: @(->)@, @Int#@.
  | PrimTyConI
       Name
       Arity
       Unlifted

  -- | A data constructor
  | DataConI
       Name
       Type
       ParentName

  -- | A pattern synonym
  | PatSynI
       Name
       PatSynType

  {- |
  A \"value\" variable (as opposed to a type variable, see 'TyVarI').

  The @Maybe Dec@ field contains @Just@ the declaration which
  defined the variable - including the RHS of the declaration -
  or else @Nothing@, in the case where the RHS is unavailable to
  the compiler. At present, this value is /always/ @Nothing@:
  returning the RHS has not yet been implemented because of
  lack of interest.
  -}
  | VarI
       Name
       Type
       (Maybe Dec)

  {- |
  A type variable.

  The @Type@ field contains the type which underlies the variable.
  At present, this is always @'VarT' theName@, but future changes
  may permit refinement of this.
  -}
  | TyVarI      -- Scoped type variable
        Name
        Type    -- What it is bound to
  deriving( Int -> Info -> ShowS
[Info] -> ShowS
Info -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [Info] -> ShowS
$cshowList :: [Info] -> ShowS
show :: Info -> String
$cshow :: Info -> String
showsPrec :: Int -> Info -> ShowS
$cshowsPrec :: Int -> Info -> ShowS
Show, Info -> Info -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Info -> Info -> Bool
$c/= :: Info -> Info -> Bool
== :: Info -> Info -> Bool
$c== :: Info -> Info -> Bool
Eq, Eq Info
Info -> Info -> Bool
Info -> Info -> Ordering
Info -> Info -> Info
forall a.
Eq a
-> (a -> a -> Ordering)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> a)
-> (a -> a -> a)
-> Ord a
min :: Info -> Info -> Info
$cmin :: Info -> Info -> Info
max :: Info -> Info -> Info
$cmax :: Info -> Info -> Info
>= :: Info -> Info -> Bool
$c>= :: Info -> Info -> Bool
> :: Info -> Info -> Bool
$c> :: Info -> Info -> Bool
<= :: Info -> Info -> Bool
$c<= :: Info -> Info -> Bool
< :: Info -> Info -> Bool
$c< :: Info -> Info -> Bool
compare :: Info -> Info -> Ordering
$ccompare :: Info -> Info -> Ordering
Ord, Typeable Info
Info -> DataType
Info -> Constr
(forall b. Data b => b -> b) -> Info -> Info
forall a.
Typeable a
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> a -> c a)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c a)
-> (a -> Constr)
-> (a -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c a))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c a))
-> ((forall b. Data b => b -> b) -> a -> a)
-> (forall r r'.
    (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall r r'.
    (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall u. (forall d. Data d => d -> u) -> a -> [u])
-> (forall u. Int -> (forall d. Data d => d -> u) -> a -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> Data a
forall u. Int -> (forall d. Data d => d -> u) -> Info -> u
forall u. (forall d. Data d => d -> u) -> Info -> [u]
forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Info -> r
forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Info -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Info -> m Info
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Info -> m Info
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Info
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Info -> c Info
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Info)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Info)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Info -> m Info
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Info -> m Info
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Info -> m Info
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Info -> m Info
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Info -> m Info
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Info -> m Info
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Info -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Info -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> Info -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> Info -> [u]
gmapQr :: forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Info -> r
$cgmapQr :: forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Info -> r
gmapQl :: forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Info -> r
$cgmapQl :: forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Info -> r
gmapT :: (forall b. Data b => b -> b) -> Info -> Info
$cgmapT :: (forall b. Data b => b -> b) -> Info -> Info
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Info)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Info)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Info)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Info)
dataTypeOf :: Info -> DataType
$cdataTypeOf :: Info -> DataType
toConstr :: Info -> Constr
$ctoConstr :: Info -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Info
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Info
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Info -> c Info
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Info -> c Info
Data, forall x. Rep Info x -> Info
forall x. Info -> Rep Info x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
$cto :: forall x. Rep Info x -> Info
$cfrom :: forall x. Info -> Rep Info x
Generic )

-- | Obtained from 'reifyModule' in the 'Q' Monad.
data ModuleInfo =
  -- | Contains the import list of the module.
  ModuleInfo [Module]
  deriving( Int -> ModuleInfo -> ShowS
[ModuleInfo] -> ShowS
ModuleInfo -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [ModuleInfo] -> ShowS
$cshowList :: [ModuleInfo] -> ShowS
show :: ModuleInfo -> String
$cshow :: ModuleInfo -> String
showsPrec :: Int -> ModuleInfo -> ShowS
$cshowsPrec :: Int -> ModuleInfo -> ShowS
Show, ModuleInfo -> ModuleInfo -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: ModuleInfo -> ModuleInfo -> Bool
$c/= :: ModuleInfo -> ModuleInfo -> Bool
== :: ModuleInfo -> ModuleInfo -> Bool
$c== :: ModuleInfo -> ModuleInfo -> Bool
Eq, Eq ModuleInfo
ModuleInfo -> ModuleInfo -> Bool
ModuleInfo -> ModuleInfo -> Ordering
ModuleInfo -> ModuleInfo -> ModuleInfo
forall a.
Eq a
-> (a -> a -> Ordering)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> a)
-> (a -> a -> a)
-> Ord a
min :: ModuleInfo -> ModuleInfo -> ModuleInfo
$cmin :: ModuleInfo -> ModuleInfo -> ModuleInfo
max :: ModuleInfo -> ModuleInfo -> ModuleInfo
$cmax :: ModuleInfo -> ModuleInfo -> ModuleInfo
>= :: ModuleInfo -> ModuleInfo -> Bool
$c>= :: ModuleInfo -> ModuleInfo -> Bool
> :: ModuleInfo -> ModuleInfo -> Bool
$c> :: ModuleInfo -> ModuleInfo -> Bool
<= :: ModuleInfo -> ModuleInfo -> Bool
$c<= :: ModuleInfo -> ModuleInfo -> Bool
< :: ModuleInfo -> ModuleInfo -> Bool
$c< :: ModuleInfo -> ModuleInfo -> Bool
compare :: ModuleInfo -> ModuleInfo -> Ordering
$ccompare :: ModuleInfo -> ModuleInfo -> Ordering
Ord, Typeable ModuleInfo
ModuleInfo -> DataType
ModuleInfo -> Constr
(forall b. Data b => b -> b) -> ModuleInfo -> ModuleInfo
forall a.
Typeable a
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> a -> c a)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c a)
-> (a -> Constr)
-> (a -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c a))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c a))
-> ((forall b. Data b => b -> b) -> a -> a)
-> (forall r r'.
    (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall r r'.
    (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall u. (forall d. Data d => d -> u) -> a -> [u])
-> (forall u. Int -> (forall d. Data d => d -> u) -> a -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
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{- |
In 'ClassOpI' and 'DataConI', name of the parent class or type
-}
type ParentName = Name

-- | In 'UnboxedSumE' and 'UnboxedSumP', the number associated with a
-- particular data constructor. 'SumAlt's are one-indexed and should never
-- exceed the value of its corresponding 'SumArity'. For example:
--
-- * @(\#_|\#)@ has 'SumAlt' 1 (out of a total 'SumArity' of 2)
--
-- * @(\#|_\#)@ has 'SumAlt' 2 (out of a total 'SumArity' of 2)
type SumAlt = Int

-- | In 'UnboxedSumE', 'UnboxedSumT', and 'UnboxedSumP', the total number of
-- 'SumAlt's. For example, @(\#|\#)@ has a 'SumArity' of 2.
type SumArity = Int

-- | In 'PrimTyConI', arity of the type constructor
type Arity = Int

-- | In 'PrimTyConI', is the type constructor unlifted?
type Unlifted = Bool

-- | 'InstanceDec' describes a single instance of a class or type function.
-- It is just a 'Dec', but guaranteed to be one of the following:
--
--   * 'InstanceD' (with empty @['Dec']@)
--
--   * 'DataInstD' or 'NewtypeInstD' (with empty derived @['Name']@)
--
--   * 'TySynInstD'
type InstanceDec = Dec

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-- | Highest allowed operator precedence for 'Fixity' constructor (answer: 9)
maxPrecedence :: Int
maxPrecedence :: Int
maxPrecedence = (Int
9::Int)

-- | Default fixity: @infixl 9@
defaultFixity :: Fixity
defaultFixity :: Fixity
defaultFixity = Int -> FixityDirection -> Fixity
Fixity Int
maxPrecedence FixityDirection
InfixL


{-
Note [Unresolved infix]
~~~~~~~~~~~~~~~~~~~~~~~
-}
{- $infix #infix#
When implementing antiquotation for quasiquoters, one often wants
to parse strings into expressions:

> parse :: String -> Maybe Exp

But how should we parse @a + b * c@? If we don't know the fixities of
@+@ and @*@, we don't know whether to parse it as @a + (b * c)@ or @(a
+ b) * c@.

In cases like this, use 'UInfixE', 'UInfixP', or 'UInfixT', which stand for
\"unresolved infix expression/pattern/type\", respectively. When the compiler
is given a splice containing a tree of @UInfixE@ applications such as

> UInfixE
>   (UInfixE e1 op1 e2)
>   op2
>   (UInfixE e3 op3 e4)

it will look up and the fixities of the relevant operators and
reassociate the tree as necessary.

  * trees will not be reassociated across 'ParensE', 'ParensP', or 'ParensT',
    which are of use for parsing expressions like

    > (a + b * c) + d * e

  * 'InfixE', 'InfixP', and 'InfixT' expressions are never reassociated.

  * The 'UInfixE' constructor doesn't support sections. Sections
    such as @(a *)@ have no ambiguity, so 'InfixE' suffices. For longer
    sections such as @(a + b * c -)@, use an 'InfixE' constructor for the
    outer-most section, and use 'UInfixE' constructors for all
    other operators:

    > InfixE
    >   Just (UInfixE ...a + b * c...)
    >   op
    >   Nothing

    Sections such as @(a + b +)@ and @((a + b) +)@ should be rendered
    into 'Exp's differently:

    > (+ a + b)   ---> InfixE Nothing + (Just $ UInfixE a + b)
    >                    -- will result in a fixity error if (+) is left-infix
    > (+ (a + b)) ---> InfixE Nothing + (Just $ ParensE $ UInfixE a + b)
    >                    -- no fixity errors

  * Quoted expressions such as

    > [| a * b + c |] :: Q Exp
    > [p| a : b : c |] :: Q Pat
    > [t| T + T |] :: Q Type

    will never contain 'UInfixE', 'UInfixP', 'UInfixT', 'InfixT', 'ParensE',
    'ParensP', or 'ParensT' constructors.

-}

-----------------------------------------------------
--
--      The main syntax data types
--
-----------------------------------------------------

data Lit = CharL Char
         | StringL String
         | IntegerL Integer     -- ^ Used for overloaded and non-overloaded
                                -- literals. We don't have a good way to
                                -- represent non-overloaded literals at
                                -- the moment. Maybe that doesn't matter?
         | RationalL Rational   -- Ditto
         | IntPrimL Integer
         | WordPrimL Integer
         | FloatPrimL Rational
         | DoublePrimL Rational
         | StringPrimL [Word8]  -- ^ A primitive C-style string, type 'Addr#'
         | BytesPrimL Bytes     -- ^ Some raw bytes, type 'Addr#':
         | CharPrimL Char
    deriving( Int -> Lit -> ShowS
[Lit] -> ShowS
Lit -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [Lit] -> ShowS
$cshowList :: [Lit] -> ShowS
show :: Lit -> String
$cshow :: Lit -> String
showsPrec :: Int -> Lit -> ShowS
$cshowsPrec :: Int -> Lit -> ShowS
Show, Lit -> Lit -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Lit -> Lit -> Bool
$c/= :: Lit -> Lit -> Bool
== :: Lit -> Lit -> Bool
$c== :: Lit -> Lit -> Bool
Eq, Eq Lit
Lit -> Lit -> Bool
Lit -> Lit -> Ordering
Lit -> Lit -> Lit
forall a.
Eq a
-> (a -> a -> Ordering)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> a)
-> (a -> a -> a)
-> Ord a
min :: Lit -> Lit -> Lit
$cmin :: Lit -> Lit -> Lit
max :: Lit -> Lit -> Lit
$cmax :: Lit -> Lit -> Lit
>= :: Lit -> Lit -> Bool
$c>= :: Lit -> Lit -> Bool
> :: Lit -> Lit -> Bool
$c> :: Lit -> Lit -> Bool
<= :: Lit -> Lit -> Bool
$c<= :: Lit -> Lit -> Bool
< :: Lit -> Lit -> Bool
$c< :: Lit -> Lit -> Bool
compare :: Lit -> Lit -> Ordering
$ccompare :: Lit -> Lit -> Ordering
Ord, Typeable Lit
Lit -> DataType
Lit -> Constr
(forall b. Data b => b -> b) -> Lit -> Lit
forall a.
Typeable a
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> a -> c a)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c a)
-> (a -> Constr)
-> (a -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c a))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c a))
-> ((forall b. Data b => b -> b) -> a -> a)
-> (forall r r'.
    (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall r r'.
    (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall u. (forall d. Data d => d -> u) -> a -> [u])
-> (forall u. Int -> (forall d. Data d => d -> u) -> a -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> Data a
forall u. Int -> (forall d. Data d => d -> u) -> Lit -> u
forall u. (forall d. Data d => d -> u) -> Lit -> [u]
forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Lit -> r
forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Lit -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Lit -> m Lit
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Lit -> m Lit
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Lit
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Lit -> c Lit
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Lit)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Lit)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Lit -> m Lit
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Lit -> m Lit
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Lit -> m Lit
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Lit -> m Lit
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Lit -> m Lit
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Lit -> m Lit
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Lit -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Lit -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> Lit -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> Lit -> [u]
gmapQr :: forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Lit -> r
$cgmapQr :: forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Lit -> r
gmapQl :: forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Lit -> r
$cgmapQl :: forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Lit -> r
gmapT :: (forall b. Data b => b -> b) -> Lit -> Lit
$cgmapT :: (forall b. Data b => b -> b) -> Lit -> Lit
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Lit)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Lit)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Lit)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Lit)
dataTypeOf :: Lit -> DataType
$cdataTypeOf :: Lit -> DataType
toConstr :: Lit -> Constr
$ctoConstr :: Lit -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Lit
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Lit
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Lit -> c Lit
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Lit -> c Lit
Data, forall x. Rep Lit x -> Lit
forall x. Lit -> Rep Lit x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
$cto :: forall x. Rep Lit x -> Lit
$cfrom :: forall x. Lit -> Rep Lit x
Generic )

    -- We could add Int, Float, Double etc, as we do in HsLit,
    -- but that could complicate the
    -- supposedly-simple TH.Syntax literal type

-- | Raw bytes embedded into the binary.
--
-- Avoid using Bytes constructor directly as it is likely to change in the
-- future. Use helpers such as `mkBytes` in Language.Haskell.TH.Lib instead.
data Bytes = Bytes
   { Bytes -> ForeignPtr Word8
bytesPtr    :: ForeignPtr Word8 -- ^ Pointer to the data
   , Bytes -> Word
bytesOffset :: Word             -- ^ Offset from the pointer
   , Bytes -> Word
bytesSize   :: Word             -- ^ Number of bytes
   -- Maybe someday:
   -- , bytesAlignement  :: Word -- ^ Alignement constraint
   -- , bytesReadOnly    :: Bool -- ^ Shall we embed into a read-only
   --                            --   section or not
   -- , bytesInitialized :: Bool -- ^ False: only use `bytesSize` to allocate
   --                            --   an uninitialized region
   }
   deriving (Typeable Bytes
Bytes -> DataType
Bytes -> Constr
(forall b. Data b => b -> b) -> Bytes -> Bytes
forall a.
Typeable a
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> a -> c a)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c a)
-> (a -> Constr)
-> (a -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c a))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c a))
-> ((forall b. Data b => b -> b) -> a -> a)
-> (forall r r'.
    (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall r r'.
    (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall u. (forall d. Data d => d -> u) -> a -> [u])
-> (forall u. Int -> (forall d. Data d => d -> u) -> a -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> Data a
forall u. Int -> (forall d. Data d => d -> u) -> Bytes -> u
forall u. (forall d. Data d => d -> u) -> Bytes -> [u]
forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Bytes -> r
forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Bytes -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Bytes -> m Bytes
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Bytes -> m Bytes
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Bytes
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Bytes -> c Bytes
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Bytes)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Bytes)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Bytes -> m Bytes
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Bytes -> m Bytes
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Bytes -> m Bytes
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Bytes -> m Bytes
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Bytes -> m Bytes
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Bytes -> m Bytes
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Bytes -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Bytes -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> Bytes -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> Bytes -> [u]
gmapQr :: forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Bytes -> r
$cgmapQr :: forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Bytes -> r
gmapQl :: forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Bytes -> r
$cgmapQl :: forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Bytes -> r
gmapT :: (forall b. Data b => b -> b) -> Bytes -> Bytes
$cgmapT :: (forall b. Data b => b -> b) -> Bytes -> Bytes
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Bytes)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Bytes)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Bytes)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Bytes)
dataTypeOf :: Bytes -> DataType
$cdataTypeOf :: Bytes -> DataType
toConstr :: Bytes -> Constr
$ctoConstr :: Bytes -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Bytes
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Bytes
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Bytes -> c Bytes
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Bytes -> c Bytes
Data,forall x. Rep Bytes x -> Bytes
forall x. Bytes -> Rep Bytes x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
$cto :: forall x. Rep Bytes x -> Bytes
$cfrom :: forall x. Bytes -> Rep Bytes x
Generic)

-- We can't derive Show instance for Bytes because we don't want to show the
-- pointer value but the actual bytes (similarly to what ByteString does). See
-- #16457.
instance Show Bytes where
   show :: Bytes -> String
show Bytes
b = forall a. IO a -> a
unsafePerformIO forall a b. (a -> b) -> a -> b
$ forall a b. ForeignPtr a -> (Ptr a -> IO b) -> IO b
withForeignPtr (Bytes -> ForeignPtr Word8
bytesPtr Bytes
b) forall a b. (a -> b) -> a -> b
$ \Ptr Word8
ptr ->
               CStringLen -> IO String
peekCStringLen ( Ptr Word8
ptr forall a b. Ptr a -> Int -> Ptr b
`plusPtr` forall a b. (Integral a, Num b) => a -> b
fromIntegral (Bytes -> Word
bytesOffset Bytes
b)
                              , forall a b. (Integral a, Num b) => a -> b
fromIntegral (Bytes -> Word
bytesSize Bytes
b)
                              )

-- We can't derive Eq and Ord instances for Bytes because we don't want to
-- compare pointer values but the actual bytes (similarly to what ByteString
-- does).  See #16457
instance Eq Bytes where
   == :: Bytes -> Bytes -> Bool
(==) = Bytes -> Bytes -> Bool
eqBytes

instance Ord Bytes where
   compare :: Bytes -> Bytes -> Ordering
compare = Bytes -> Bytes -> Ordering
compareBytes

eqBytes :: Bytes -> Bytes -> Bool
eqBytes :: Bytes -> Bytes -> Bool
eqBytes a :: Bytes
a@(Bytes ForeignPtr Word8
fp Word
off Word
len) b :: Bytes
b@(Bytes ForeignPtr Word8
fp' Word
off' Word
len')
  | Word
len forall a. Eq a => a -> a -> Bool
/= Word
len'              = Bool
False    -- short cut on length
  | ForeignPtr Word8
fp forall a. Eq a => a -> a -> Bool
== ForeignPtr Word8
fp' Bool -> Bool -> Bool
&& Word
off forall a. Eq a => a -> a -> Bool
== Word
off' = Bool
True     -- short cut for the same bytes
  | Bool
otherwise                = Bytes -> Bytes -> Ordering
compareBytes Bytes
a Bytes
b forall a. Eq a => a -> a -> Bool
== Ordering
EQ

compareBytes :: Bytes -> Bytes -> Ordering
compareBytes :: Bytes -> Bytes -> Ordering
compareBytes (Bytes ForeignPtr Word8
_   Word
_    Word
0)    (Bytes ForeignPtr Word8
_   Word
_    Word
0)    = Ordering
EQ  -- short cut for empty Bytes
compareBytes (Bytes ForeignPtr Word8
fp1 Word
off1 Word
len1) (Bytes ForeignPtr Word8
fp2 Word
off2 Word
len2) =
    forall a. IO a -> a
unsafePerformIO forall a b. (a -> b) -> a -> b
$
      forall a b. ForeignPtr a -> (Ptr a -> IO b) -> IO b
withForeignPtr ForeignPtr Word8
fp1 forall a b. (a -> b) -> a -> b
$ \Ptr Word8
p1 ->
      forall a b. ForeignPtr a -> (Ptr a -> IO b) -> IO b
withForeignPtr ForeignPtr Word8
fp2 forall a b. (a -> b) -> a -> b
$ \Ptr Word8
p2 -> do
        CInt
i <- forall a b. Ptr a -> Ptr b -> CSize -> IO CInt
memcmp (Ptr Word8
p1 forall a b. Ptr a -> Int -> Ptr b
`plusPtr` forall a b. (Integral a, Num b) => a -> b
fromIntegral Word
off1)
                    (Ptr Word8
p2 forall a b. Ptr a -> Int -> Ptr b
`plusPtr` forall a b. (Integral a, Num b) => a -> b
fromIntegral Word
off2)
                    (forall a b. (Integral a, Num b) => a -> b
fromIntegral (forall a. Ord a => a -> a -> a
min Word
len1 Word
len2))
        forall (m :: * -> *) a. Monad m => a -> m a
return forall a b. (a -> b) -> a -> b
$! (CInt
i forall a. Ord a => a -> a -> Ordering
`compare` CInt
0) forall a. Semigroup a => a -> a -> a
<> (Word
len1 forall a. Ord a => a -> a -> Ordering
`compare` Word
len2)

foreign import ccall unsafe "memcmp"
  memcmp :: Ptr a -> Ptr b -> CSize -> IO CInt


-- | Pattern in Haskell given in @{}@
data Pat
  = LitP Lit                        -- ^ @{ 5 or \'c\' }@
  | VarP Name                       -- ^ @{ x }@
  | TupP [Pat]                      -- ^ @{ (p1,p2) }@
  | UnboxedTupP [Pat]               -- ^ @{ (\# p1,p2 \#) }@
  | UnboxedSumP Pat SumAlt SumArity -- ^ @{ (\#|p|\#) }@
  | ConP Name [Type] [Pat]          -- ^ @data T1 = C1 t1 t2; {C1 \@ty1 p1 p2} = e@
  | InfixP Pat Name Pat             -- ^ @foo ({x :+ y}) = e@
  | UInfixP Pat Name Pat            -- ^ @foo ({x :+ y}) = e@
                                    --
                                    -- See "Language.Haskell.TH.Syntax#infix"
  | ParensP Pat                     -- ^ @{(p)}@
                                    --
                                    -- See "Language.Haskell.TH.Syntax#infix"
  | TildeP Pat                      -- ^ @{ ~p }@
  | BangP Pat                       -- ^ @{ !p }@
  | AsP Name Pat                    -- ^ @{ x \@ p }@
  | WildP                           -- ^ @{ _ }@
  | RecP Name [FieldPat]            -- ^ @f (Pt { pointx = x }) = g x@
  | ListP [ Pat ]                   -- ^ @{ [1,2,3] }@
  | SigP Pat Type                   -- ^ @{ p :: t }@
  | ViewP Exp Pat                   -- ^ @{ e -> p }@
  deriving( Int -> Pat -> ShowS
[Pat] -> ShowS
Pat -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [Pat] -> ShowS
$cshowList :: [Pat] -> ShowS
show :: Pat -> String
$cshow :: Pat -> String
showsPrec :: Int -> Pat -> ShowS
$cshowsPrec :: Int -> Pat -> ShowS
Show, Pat -> Pat -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Pat -> Pat -> Bool
$c/= :: Pat -> Pat -> Bool
== :: Pat -> Pat -> Bool
$c== :: Pat -> Pat -> Bool
Eq, Eq Pat
Pat -> Pat -> Bool
Pat -> Pat -> Ordering
Pat -> Pat -> Pat
forall a.
Eq a
-> (a -> a -> Ordering)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> a)
-> (a -> a -> a)
-> Ord a
min :: Pat -> Pat -> Pat
$cmin :: Pat -> Pat -> Pat
max :: Pat -> Pat -> Pat
$cmax :: Pat -> Pat -> Pat
>= :: Pat -> Pat -> Bool
$c>= :: Pat -> Pat -> Bool
> :: Pat -> Pat -> Bool
$c> :: Pat -> Pat -> Bool
<= :: Pat -> Pat -> Bool
$c<= :: Pat -> Pat -> Bool
< :: Pat -> Pat -> Bool
$c< :: Pat -> Pat -> Bool
compare :: Pat -> Pat -> Ordering
$ccompare :: Pat -> Pat -> Ordering
Ord, Typeable Pat
Pat -> DataType
Pat -> Constr
(forall b. Data b => b -> b) -> Pat -> Pat
forall a.
Typeable a
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> a -> c a)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c a)
-> (a -> Constr)
-> (a -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c a))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c a))
-> ((forall b. Data b => b -> b) -> a -> a)
-> (forall r r'.
    (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall r r'.
    (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> a -> r)
-> (forall u. (forall d. Data d => d -> u) -> a -> [u])
-> (forall u. Int -> (forall d. Data d => d -> u) -> a -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> a -> m a)
-> Data a
forall u. Int -> (forall d. Data d => d -> u) -> Pat -> u
forall u. (forall d. Data d => d -> u) -> Pat -> [u]
forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Pat -> r
forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Pat -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Pat -> m Pat
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Pat -> m Pat
forall (c :: * -> *).
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type FieldPat = (Name,Pat)

data Match = Match Pat Body [Dec] -- ^ @case e of { pat -> body where decs }@
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data Clause = Clause [Pat] Body [Dec]
                                  -- ^ @f { p1 p2 = body where decs }@
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data Exp
  = VarE Name                          -- ^ @{ x }@
  | ConE Name                          -- ^ @data T1 = C1 t1 t2; p = {C1} e1 e2  @
  | LitE Lit                           -- ^ @{ 5 or \'c\'}@
  | AppE Exp Exp                       -- ^ @{ f x }@
  | AppTypeE Exp Type                  -- ^ @{ f \@Int }@

  | InfixE (Maybe Exp) Exp (Maybe Exp) -- ^ @{x + y} or {(x+)} or {(+ x)} or {(+)}@

    -- It's a bit gruesome to use an Exp as the operator when a Name
    -- would suffice. Historically, Exp was used to make it easier to
    -- distinguish between infix constructors and non-constructors.
    -- This is a bit overkill, since one could just as well call
    -- `startsConId` or `startsConSym` (from `GHC.Lexeme`) on a Name.
    -- Unfortunately, changing this design now would involve lots of
    -- code churn for consumers of the TH API, so we continue to use
    -- an Exp as the operator and perform an extra check during conversion
    -- to ensure that the Exp is a constructor or a variable (#16895).

  | UInfixE Exp Exp Exp                -- ^ @{x + y}@
                                       --
                                       -- See "Language.Haskell.TH.Syntax#infix"
  | ParensE Exp                        -- ^ @{ (e) }@
                                       --
                                       -- See "Language.Haskell.TH.Syntax#infix"
  | LamE [Pat] Exp                     -- ^ @{ \\ p1 p2 -> e }@
  | LamCaseE [Match]                   -- ^ @{ \\case m1; m2 }@
  | TupE [Maybe Exp]                   -- ^ @{ (e1,e2) }  @
                                       --
                                       -- The 'Maybe' is necessary for handling
                                       -- tuple sections.
                                       --
                                       -- > (1,)
                                       --
                                       -- translates to
                                       --
                                       -- > TupE [Just (LitE (IntegerL 1)),Nothing]

  | UnboxedTupE [Maybe Exp]            -- ^ @{ (\# e1,e2 \#) }  @
                                       --
                                       -- The 'Maybe' is necessary for handling
                                       -- tuple sections.
                                       --
                                       -- > (# 'c', #)
                                       --
                                       -- translates to
                                       --
                                       -- > UnboxedTupE [Just (LitE (CharL 'c')),Nothing]

  | UnboxedSumE Exp SumAlt SumArity    -- ^ @{ (\#|e|\#) }@
  | CondE Exp Exp Exp                  -- ^ @{ if e1 then e2 else e3 }@
  | MultiIfE [(Guard, Exp)]            -- ^ @{ if | g1 -> e1 | g2 -> e2 }@
  | LetE [Dec] Exp                     -- ^ @{ let { x=e1; y=e2 } in e3 }@
  | CaseE Exp [Match]                  -- ^ @{ case e of m1; m2 }@
  | DoE (Maybe ModName) [Stmt]         -- ^ @{ do { p <- e1; e2 }  }@ or a qualified do if
                                       -- the module name is present
  | MDoE (Maybe ModName) [Stmt]        -- ^ @{ mdo { x <- e1 y; y <- e2 x; } }@ or a qualified
                                       -- mdo if the module name is present
  | CompE [Stmt]                       -- ^ @{ [ (x,y) | x <- xs, y <- ys ] }@
      --
      -- The result expression of the comprehension is
      -- the /last/ of the @'Stmt'@s, and should be a 'NoBindS'.
      --
      -- E.g. translation:
      --
      -- > [ f x | x <- xs ]
      --
      -- > CompE [BindS (VarP x) (VarE xs), NoBindS (AppE (VarE f) (VarE x))]

  | ArithSeqE Range                    -- ^ @{ [ 1 ,2 .. 10 ] }@
  | ListE [ Exp ]                      -- ^ @{ [1,2,3] }@
  | SigE Exp Type                      -- ^ @{ e :: t }@
  | RecConE Name [FieldExp]            -- ^ @{ T { x = y, z = w } }@
  | RecUpdE Exp [FieldExp]             -- ^ @{ (f x) { z = w } }@
  | StaticE Exp                        -- ^ @{ static e }@
  | UnboundVarE Name                   -- ^ @{ _x }@
                                       --
                                       -- This is used for holes or unresolved
                                       -- identifiers in AST quotes. Note that
                                       -- it could either have a variable name
                                       -- or constructor name.
  | LabelE String                      -- ^ @{ #x }@ ( Overloaded label )
  | ImplicitParamVarE String           -- ^ @{ ?x }@ ( Implicit parameter )
  | GetFieldE Exp String               -- ^ @{ exp.field }@ ( Overloaded Record Dot )
  | ProjectionE (NonEmpty String)      -- ^ @(.x)@ or @(.x.y)@ (Record projections)
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data Dec
  = FunD Name [Clause]            -- ^ @{ f p1 p2 = b where decs }@
  | ValD Pat Body [Dec]           -- ^ @{ p = b where decs }@
  | DataD Cxt Name [TyVarBndr ()]
          (Maybe Kind)            -- Kind signature (allowed only for GADTs)
          [Con] [DerivClause]
                                  -- ^ @{ data Cxt x => T x = A x | B (T x)
                                  --       deriving (Z,W)
                                  --       deriving stock Eq }@
  | NewtypeD Cxt Name [TyVarBndr ()]
             (Maybe Kind)         -- Kind signature
             Con [DerivClause]    -- ^ @{ newtype Cxt x => T x = A (B x)
                                  --       deriving (Z,W Q)
                                  --       deriving stock Eq }@
  | TySynD Name [TyVarBndr ()] Type -- ^ @{ type T x = (x,x) }@
  | ClassD Cxt Name [TyVarBndr ()]
         [FunDep] [Dec]           -- ^ @{ class Eq a => Ord a where ds }@
  | InstanceD (Maybe Overlap) Cxt Type [Dec]
                                  -- ^ @{ instance {\-\# OVERLAPS \#-\}
                                  --        Show w => Show [w] where ds }@
  | SigD Name Type                -- ^ @{ length :: [a] -> Int }@
  | KiSigD Name Kind              -- ^ @{ type TypeRep :: k -> Type }@
  | ForeignD Foreign              -- ^ @{ foreign import ... }
                                  --{ foreign export ... }@

  | InfixD Fixity Name            -- ^ @{ infix 3 foo }@

  -- | pragmas
  | PragmaD Pragma                -- ^ @{ {\-\# INLINE [1] foo \#-\} }@

  -- | data families (may also appear in [Dec] of 'ClassD' and 'InstanceD')
  | DataFamilyD Name [TyVarBndr ()]
               (Maybe Kind)
         -- ^ @{ data family T a b c :: * }@

  | DataInstD Cxt (Maybe [TyVarBndr ()]) Type
             (Maybe Kind)         -- Kind signature
             [Con] [DerivClause]  -- ^ @{ data instance Cxt x => T [x]
                                  --       = A x | B (T x)
                                  --       deriving (Z,W)
                                  --       deriving stock Eq }@

  | NewtypeInstD Cxt (Maybe [TyVarBndr ()]) Type -- Quantified type vars
                 (Maybe Kind)      -- Kind signature
                 Con [DerivClause] -- ^ @{ newtype instance Cxt x => T [x]
                                   --        = A (B x)
                                   --        deriving (Z,W)
                                   --        deriving stock Eq }@
  | TySynInstD TySynEqn            -- ^ @{ type instance ... }@

  -- | open type families (may also appear in [Dec] of 'ClassD' and 'InstanceD')
  | OpenTypeFamilyD TypeFamilyHead
         -- ^ @{ type family T a b c = (r :: *) | r -> a b }@

  | ClosedTypeFamilyD TypeFamilyHead [TySynEqn]
       -- ^ @{ type family F a b = (r :: *) | r -> a where ... }@

  | RoleAnnotD Name [Role]     -- ^ @{ type role T nominal representational }@
  | StandaloneDerivD (Maybe DerivStrategy) Cxt Type
       -- ^ @{ deriving stock instance Ord a => Ord (Foo a) }@
  | DefaultSigD Name Type      -- ^ @{ default size :: Data a => a -> Int }@

  -- | Pattern Synonyms
  | PatSynD Name PatSynArgs PatSynDir Pat
      -- ^ @{ pattern P v1 v2 .. vn <- p }@  unidirectional           or
      --   @{ pattern P v1 v2 .. vn = p  }@  implicit bidirectional   or
      --   @{ pattern P v1 v2 .. vn <- p
      --        where P v1 v2 .. vn = e  }@  explicit bidirectional
      --
      -- also, besides prefix pattern synonyms, both infix and record
      -- pattern synonyms are supported. See 'PatSynArgs' for details

  | PatSynSigD Name PatSynType  -- ^ A pattern synonym's type signature.

  | ImplicitParamBindD String Exp
      -- ^ @{ ?x = expr }@
      --
      -- Implicit parameter binding declaration. Can only be used in let
      -- and where clauses which consist entirely of implicit bindings.
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-- | Varieties of allowed instance overlap.
data Overlap = Overlappable   -- ^ May be overlapped by more specific instances
             | Overlapping    -- ^ May overlap a more general instance
             | Overlaps       -- ^ Both 'Overlapping' and 'Overlappable'
             | Incoherent     -- ^ Both 'Overlappable' and 'Overlappable', and
                              -- pick an arbitrary one if multiple choices are
                              -- available.
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-- | A single @deriving@ clause at the end of a datatype.
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-- | What the user explicitly requests when deriving an instance.
data DerivStrategy = StockStrategy    -- ^ A \"standard\" derived instance
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                   | NewtypeStrategy  -- ^ @-XGeneralizedNewtypeDeriving@
                   | ViaStrategy Type -- ^ @-XDerivingVia@
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-- | A pattern synonym's type. Note that a pattern synonym's /fully/
-- specified type has a peculiar shape coming with two forall
-- quantifiers and two constraint contexts. For example, consider the
-- pattern synonym
--
-- > pattern P x1 x2 ... xn = <some-pattern>
--
-- P's complete type is of the following form
--
-- > pattern P :: forall universals.   required constraints
-- >           => forall existentials. provided constraints
-- >           => t1 -> t2 -> ... -> tn -> t
--
-- consisting of four parts:
--
--   1. the (possibly empty lists of) universally quantified type
--      variables and required constraints on them.
--   2. the (possibly empty lists of) existentially quantified
--      type variables and the provided constraints on them.
--   3. the types @t1@, @t2@, .., @tn@ of @x1@, @x2@, .., @xn@, respectively
--   4. the type @t@ of @\<some-pattern\>@, mentioning only universals.
--
-- Pattern synonym types interact with TH when (a) reifying a pattern
-- synonym, (b) pretty printing, or (c) specifying a pattern synonym's
-- type signature explicitly:
--
--   * Reification always returns a pattern synonym's /fully/ specified
--     type in abstract syntax.
--
--   * Pretty printing via 'Language.Haskell.TH.Ppr.pprPatSynType' abbreviates
--     a pattern synonym's type unambiguously in concrete syntax: The rule of
--     thumb is to print initial empty universals and the required
--     context as @() =>@, if existentials and a provided context
--     follow. If only universals and their required context, but no
--     existentials are specified, only the universals and their
--     required context are printed. If both or none are specified, so
--     both (or none) are printed.
--
--   * When specifying a pattern synonym's type explicitly with
--     'PatSynSigD' either one of the universals, the existentials, or
--     their contexts may be left empty.
--
-- See the GHC user's guide for more information on pattern synonyms
-- and their types:
-- <https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/glasgow_exts.html#pattern-synonyms>.
type PatSynType = Type

-- | Common elements of 'OpenTypeFamilyD' and 'ClosedTypeFamilyD'. By
-- analogy with "head" for type classes and type class instances as
-- defined in /Type classes: an exploration of the design space/, the
-- @TypeFamilyHead@ is defined to be the elements of the declaration
-- between @type family@ and @where@.
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-- | One equation of a type family instance or closed type family. The
-- arguments are the left-hand-side type and the right-hand-side result.
--
-- For instance, if you had the following type family:
--
-- @
-- type family Foo (a :: k) :: k where
--   forall k (a :: k). Foo \@k a = a
-- @
--
-- The @Foo \@k a = a@ equation would be represented as follows:
--
-- @
-- 'TySynEqn' ('Just' ['PlainTV' k, 'KindedTV' a ('VarT' k)])
--            ('AppT' ('AppKindT' ('ConT' ''Foo) ('VarT' k)) ('VarT' a))
--            ('VarT' a)
-- @
data TySynEqn = TySynEqn (Maybe [TyVarBndr ()]) Type Type
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-- keep Callconv in sync with module ForeignCall in ghc/compiler/GHC/Types/ForeignCall.hs
data Callconv = CCall | StdCall | CApi | Prim | JavaScript
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type Cxt = [Pred]                 -- ^ @(Eq a, Ord b)@

-- | Since the advent of @ConstraintKinds@, constraints are really just types.
-- Equality constraints use the 'EqualityT' constructor. Constraints may also
-- be tuples of other constraints.
type Pred = Type

data SourceUnpackedness
  = NoSourceUnpackedness -- ^ @C a@
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  | SourceUnpack         -- ^ @C { {\-\# UNPACK \#-\} } a@
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data SourceStrictness = NoSourceStrictness    -- ^ @C a@
                      | SourceLazy            -- ^ @C {~}a@
                      | SourceStrict          -- ^ @C {!}a@
        deriving (Int -> SourceStrictness -> ShowS
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-- | Unlike 'SourceStrictness' and 'SourceUnpackedness', 'DecidedStrictness'
-- refers to the strictness that the compiler chooses for a data constructor
-- field, which may be different from what is written in source code. See
-- 'reifyConStrictness' for more information.
data DecidedStrictness = DecidedLazy
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-- | A single data constructor.
--
-- The constructors for 'Con' can roughly be divided up into two categories:
-- those for constructors with \"vanilla\" syntax ('NormalC', 'RecC', and
-- 'InfixC'), and those for constructors with GADT syntax ('GadtC' and
-- 'RecGadtC'). The 'ForallC' constructor, which quantifies additional type
-- variables and class contexts, can surround either variety of constructor.
-- However, the type variables that it quantifies are different depending
-- on what constructor syntax is used:
--
-- * If a 'ForallC' surrounds a constructor with vanilla syntax, then the
--   'ForallC' will only quantify /existential/ type variables. For example:
--
--   @
--   data Foo a = forall b. MkFoo a b
--   @
--
--   In @MkFoo@, 'ForallC' will quantify @b@, but not @a@.
--
-- * If a 'ForallC' surrounds a constructor with GADT syntax, then the
--   'ForallC' will quantify /all/ type variables used in the constructor.
--   For example:
--
--   @
--   data Bar a b where
--     MkBar :: (a ~ b) => c -> MkBar a b
--   @
--
--   In @MkBar@, 'ForallC' will quantify @a@, @b@, and @c@.
data Con = NormalC Name [BangType]       -- ^ @C Int a@
         | RecC Name [VarBangType]       -- ^ @C { v :: Int, w :: a }@
         | InfixC BangType Name BangType -- ^ @Int :+ a@
         | ForallC [TyVarBndr Specificity] Cxt Con -- ^ @forall a. Eq a => C [a]@
         | GadtC [Name] [BangType]
                 Type                    -- See Note [GADT return type]
                                         -- ^ @C :: a -> b -> T b Int@
         | RecGadtC [Name] [VarBangType]
                    Type                 -- See Note [GADT return type]
                                         -- ^ @C :: { v :: Int } -> T b Int@
        deriving (Int -> Con -> ShowS
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-- Note [GADT return type]
-- ~~~~~~~~~~~~~~~~~~~~~~~
--
-- The return type of a GADT constructor does not necessarily match the name of
-- the data type:
--
-- type S = T
--
-- data T a where
--     MkT :: S Int
--
--
-- type S a = T
--
-- data T a where
--     MkT :: S Char Int
--
--
-- type Id a = a
-- type S a = T
--
-- data T a where
--     MkT :: Id (S Char Int)
--
--
-- That is why we allow the return type stored by a constructor to be an
-- arbitrary type. See also #11341

data Bang = Bang SourceUnpackedness SourceStrictness
         -- ^ @C { {\-\# UNPACK \#-\} !}a@
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type BangType    = (Bang, Type)
type VarBangType = (Name, Bang, Type)

-- | As of @template-haskell-2.11.0.0@, 'Strict' has been replaced by 'Bang'.
type Strict      = Bang

-- | As of @template-haskell-2.11.0.0@, 'StrictType' has been replaced by
-- 'BangType'.
type StrictType    = BangType

-- | As of @template-haskell-2.11.0.0@, 'VarStrictType' has been replaced by
-- 'VarBangType'.
type VarStrictType = VarBangType

-- | A pattern synonym's directionality.
data PatSynDir
  = Unidir             -- ^ @pattern P x {<-} p@
  | ImplBidir          -- ^ @pattern P x {=} p@
  | ExplBidir [Clause] -- ^ @pattern P x {<-} p where P x = e@
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-- | A pattern synonym's argument type.
data PatSynArgs
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  | InfixPatSyn Name Name      -- ^ @pattern {x P y} = p@
  | RecordPatSyn [Name]        -- ^ @pattern P { {x,y,z} } = p@
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data Type = ForallT [TyVarBndr Specificity] Cxt Type -- ^ @forall \<vars\>. \<ctxt\> => \<type\>@
          | ForallVisT [TyVarBndr ()] Type  -- ^ @forall \<vars\> -> \<type\>@
          | AppT Type Type                -- ^ @T a b@
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          | SigT Type Kind                -- ^ @t :: k@
          | VarT Name                     -- ^ @a@
          | ConT Name                     -- ^ @T@
          | PromotedT Name                -- ^ @'T@
          | InfixT Type Name Type         -- ^ @T + T@
          | UInfixT Type Name Type        -- ^ @T + T@
                                          --
                                          -- See "Language.Haskell.TH.Syntax#infix"
          | ParensT Type                  -- ^ @(T)@

          -- See Note [Representing concrete syntax in types]
          | TupleT Int                    -- ^ @(,), (,,), etc.@
          | UnboxedTupleT Int             -- ^ @(\#,\#), (\#,,\#), etc.@
          | UnboxedSumT SumArity          -- ^ @(\#|\#), (\#||\#), etc.@
          | ArrowT                        -- ^ @->@
          | MulArrowT                     -- ^ @FUN@
          | EqualityT                     -- ^ @~@
          | ListT                         -- ^ @[]@
          | PromotedTupleT Int            -- ^ @'(), '(,), '(,,), etc.@
          | PromotedNilT                  -- ^ @'[]@
          | PromotedConsT                 -- ^ @(':)@
          | StarT                         -- ^ @*@
          | ConstraintT                   -- ^ @Constraint@
          | LitT TyLit                    -- ^ @0,1,2, etc.@
          | WildCardT                     -- ^ @_@
          | ImplicitParamT String Type    -- ^ @?x :: t@
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-- | Type family result signature
data FamilyResultSig = NoSig              -- ^ no signature
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-- | Injectivity annotation
data InjectivityAnn = InjectivityAnn Name [Name]
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data TyLit = NumTyLit Integer             -- ^ @2@
           | StrTyLit String              -- ^ @\"Hello\"@
           | CharTyLit Char               -- ^ @\'C\'@, @since 4.16.0.0
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-- | Role annotations
data Role = NominalR            -- ^ @nominal@
          | RepresentationalR   -- ^ @representational@
          | PhantomR            -- ^ @phantom@
          | InferR              -- ^ @_@
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-- | Annotation target for reifyAnnotations
data AnnLookup = AnnLookupModule Module
               | AnnLookupName Name
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-- | To avoid duplication between kinds and types, they
-- are defined to be the same. Naturally, you would never
-- have a type be 'StarT' and you would never have a kind
-- be 'SigT', but many of the other constructors are shared.
-- Note that the kind @Bool@ is denoted with 'ConT', not
-- 'PromotedT'. Similarly, tuple kinds are made with 'TupleT',
-- not 'PromotedTupleT'.

type Kind = Type

{- Note [Representing concrete syntax in types]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Haskell has a rich concrete syntax for types, including
  t1 -> t2, (t1,t2), [t], and so on
In TH we represent all of this using AppT, with a distinguished
type constructor at the head.  So,
  Type              TH representation
  -----------------------------------------------
  t1 -> t2          ArrowT `AppT` t2 `AppT` t2
  [t]               ListT `AppT` t
  (t1,t2)           TupleT 2 `AppT` t1 `AppT` t2
  '(t1,t2)          PromotedTupleT 2 `AppT` t1 `AppT` t2

But if the original HsSyn used prefix application, we won't use
these special TH constructors.  For example
  [] t              ConT "[]" `AppT` t
  (->) t            ConT "->" `AppT` t
In this way we can faithfully represent in TH whether the original
HsType used concrete syntax or not.

The one case that doesn't fit this pattern is that of promoted lists
  '[ Maybe, IO ]    PromotedListT 2 `AppT` t1 `AppT` t2
but it's very smelly because there really is no type constructor
corresponding to PromotedListT. So we encode HsExplicitListTy with
PromotedConsT and PromotedNilT (which *do* have underlying type
constructors):
  '[ Maybe, IO ]    PromotedConsT `AppT` Maybe `AppT`
                    (PromotedConsT  `AppT` IO `AppT` PromotedNilT)
-}

-- | A location at which to attach Haddock documentation.
-- Note that adding documentation to a 'Name' defined oustide of the current
-- module will cause an error.
data DocLoc
  = ModuleDoc         -- ^ At the current module's header.
  | DeclDoc Name      -- ^ At a declaration, not necessarily top level.
  | ArgDoc Name Int   -- ^ At a specific argument of a function, indexed by its
                      -- position.
  | InstDoc Type      -- ^ At a class or family instance.
  deriving ( Int -> DocLoc -> ShowS
[DocLoc] -> ShowS
DocLoc -> String
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-----------------------------------------------------
--              Internal helper functions
-----------------------------------------------------

cmpEq :: Ordering -> Bool
cmpEq :: Ordering -> Bool
cmpEq Ordering
EQ = Bool
True
cmpEq Ordering
_  = Bool
False

thenCmp :: Ordering -> Ordering -> Ordering
thenCmp :: Ordering -> Ordering -> Ordering
thenCmp Ordering
EQ Ordering
o2 = Ordering
o2
thenCmp Ordering
o1 Ordering
_  = Ordering
o1