{-
(c) The University of Glasgow 2006
(c) The GRASP/AQUA Project, Glasgow University, 1997-1998

\section[BasicTypes]{Miscellaneous types}

This module defines a miscellaneously collection of very simple
types that

\begin{itemize}
\item have no other obvious home
\item don't depend on any other complicated types
\item are used in more than one "part" of the compiler
\end{itemize}
-}

{-# LANGUAGE DeriveDataTypeable #-}
{-# OPTIONS_GHC -Wno-incomplete-record-updates #-}

module GHC.Types.Basic (
        LeftOrRight(..),
        pickLR,

        ConTag, ConTagZ, fIRST_TAG,

        Arity, RepArity, JoinArity,

        Alignment, mkAlignment, alignmentOf, alignmentBytes,

        PromotionFlag(..), isPromoted,
        FunctionOrData(..),

        WarningTxt(..), pprWarningTxtForMsg, StringLiteral(..),

        Fixity(..), FixityDirection(..),
        defaultFixity, maxPrecedence, minPrecedence,
        negateFixity, funTyFixity,
        compareFixity,
        LexicalFixity(..),

        RecFlag(..), isRec, isNonRec, boolToRecFlag,
        Origin(..), isGenerated,

        RuleName, pprRuleName,

        TopLevelFlag(..), isTopLevel, isNotTopLevel,

        OverlapFlag(..), OverlapMode(..), setOverlapModeMaybe,
        hasOverlappingFlag, hasOverlappableFlag, hasIncoherentFlag,

        Boxity(..), isBoxed,

        PprPrec(..), topPrec, sigPrec, opPrec, funPrec, starPrec, appPrec,
        maybeParen,

        TupleSort(..), tupleSortBoxity, boxityTupleSort,
        tupleParens,

        sumParens, pprAlternative,

        -- ** The OneShotInfo type
        OneShotInfo(..),
        noOneShotInfo, hasNoOneShotInfo, isOneShotInfo,
        bestOneShot, worstOneShot,

        OccInfo(..), noOccInfo, seqOccInfo, zapFragileOcc, isOneOcc,
        isDeadOcc, isStrongLoopBreaker, isWeakLoopBreaker, isManyOccs,
        isNoOccInfo, strongLoopBreaker, weakLoopBreaker,

        InsideLam(..),
        BranchCount, oneBranch,
        InterestingCxt(..),
        TailCallInfo(..), tailCallInfo, zapOccTailCallInfo,
        isAlwaysTailCalled,

        EP(..),

        DefMethSpec(..),
        SwapFlag(..), flipSwap, unSwap, isSwapped,

        CompilerPhase(..), PhaseNum,

        Activation(..), isActive, competesWith,
        isNeverActive, isAlwaysActive, activeInFinalPhase,
        activateAfterInitial, activateDuringFinal,

        RuleMatchInfo(..), isConLike, isFunLike,
        InlineSpec(..), noUserInlineSpec,
        InlinePragma(..), defaultInlinePragma, alwaysInlinePragma,
        neverInlinePragma, dfunInlinePragma,
        isDefaultInlinePragma,
        isInlinePragma, isInlinablePragma, isAnyInlinePragma,
        inlinePragmaSpec, inlinePragmaSat,
        inlinePragmaActivation, inlinePragmaRuleMatchInfo,
        setInlinePragmaActivation, setInlinePragmaRuleMatchInfo,
        pprInline, pprInlineDebug,

        SuccessFlag(..), succeeded, failed, successIf,

        IntegralLit(..), FractionalLit(..),
        negateIntegralLit, negateFractionalLit,
        mkIntegralLit, mkFractionalLit,
        integralFractionalLit,

        SourceText(..), pprWithSourceText,

        IntWithInf, infinity, treatZeroAsInf, mkIntWithInf, intGtLimit,

        SpliceExplicitFlag(..),

        TypeOrKind(..), isTypeLevel, isKindLevel
   ) where

import GHC.Prelude

import GHC.Data.FastString
import GHC.Utils.Outputable
import GHC.Types.SrcLoc ( Located,unLoc )
import Data.Data hiding (Fixity, Prefix, Infix)
import Data.Function (on)
import Data.Bits
import qualified Data.Semigroup as Semi

{-
************************************************************************
*                                                                      *
          Binary choice
*                                                                      *
************************************************************************
-}

data LeftOrRight = CLeft | CRight
                 deriving( LeftOrRight -> LeftOrRight -> Bool
(LeftOrRight -> LeftOrRight -> Bool)
-> (LeftOrRight -> LeftOrRight -> Bool) -> Eq LeftOrRight
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: LeftOrRight -> LeftOrRight -> Bool
$c/= :: LeftOrRight -> LeftOrRight -> Bool
== :: LeftOrRight -> LeftOrRight -> Bool
$c== :: LeftOrRight -> LeftOrRight -> Bool
Eq, Typeable LeftOrRight
Typeable LeftOrRight
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> LeftOrRight -> c LeftOrRight)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c LeftOrRight)
-> (LeftOrRight -> Constr)
-> (LeftOrRight -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c LeftOrRight))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e))
    -> Maybe (c LeftOrRight))
-> ((forall b. Data b => b -> b) -> LeftOrRight -> LeftOrRight)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> LeftOrRight -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> LeftOrRight -> r)
-> (forall u. (forall d. Data d => d -> u) -> LeftOrRight -> [u])
-> (forall u.
    Int -> (forall d. Data d => d -> u) -> LeftOrRight -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> LeftOrRight -> m LeftOrRight)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> LeftOrRight -> m LeftOrRight)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> LeftOrRight -> m LeftOrRight)
-> Data LeftOrRight
LeftOrRight -> DataType
LeftOrRight -> Constr
(forall b. Data b => b -> b) -> LeftOrRight -> LeftOrRight
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) -> LeftOrRight -> u
forall u. (forall d. Data d => d -> u) -> LeftOrRight -> [u]
forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> LeftOrRight -> r
forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> LeftOrRight -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> LeftOrRight -> m LeftOrRight
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> LeftOrRight -> m LeftOrRight
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c LeftOrRight
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> LeftOrRight -> c LeftOrRight
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c LeftOrRight)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c LeftOrRight)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> LeftOrRight -> m LeftOrRight
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> LeftOrRight -> m LeftOrRight
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> LeftOrRight -> m LeftOrRight
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> LeftOrRight -> m LeftOrRight
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> LeftOrRight -> m LeftOrRight
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> LeftOrRight -> m LeftOrRight
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> LeftOrRight -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> LeftOrRight -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> LeftOrRight -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> LeftOrRight -> [u]
gmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> LeftOrRight -> r
$cgmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> LeftOrRight -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> LeftOrRight -> r
$cgmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> LeftOrRight -> r
gmapT :: (forall b. Data b => b -> b) -> LeftOrRight -> LeftOrRight
$cgmapT :: (forall b. Data b => b -> b) -> LeftOrRight -> LeftOrRight
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c LeftOrRight)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c LeftOrRight)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c LeftOrRight)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c LeftOrRight)
dataTypeOf :: LeftOrRight -> DataType
$cdataTypeOf :: LeftOrRight -> DataType
toConstr :: LeftOrRight -> Constr
$ctoConstr :: LeftOrRight -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c LeftOrRight
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c LeftOrRight
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> LeftOrRight -> c LeftOrRight
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> LeftOrRight -> c LeftOrRight
Data )

pickLR :: LeftOrRight -> (a,a) -> a
pickLR :: forall a. LeftOrRight -> (a, a) -> a
pickLR LeftOrRight
CLeft  (a
l,a
_) = a
l
pickLR LeftOrRight
CRight (a
_,a
r) = a
r

instance Outputable LeftOrRight where
  ppr :: LeftOrRight -> SDoc
ppr LeftOrRight
CLeft    = String -> SDoc
text String
"Left"
  ppr LeftOrRight
CRight   = String -> SDoc
text String
"Right"

{-
************************************************************************
*                                                                      *
\subsection[Arity]{Arity}
*                                                                      *
************************************************************************
-}

-- | The number of value arguments that can be applied to a value before it does
-- "real work". So:
--  fib 100     has arity 0
--  \x -> fib x has arity 1
-- See also Note [Definition of arity] in "GHC.Core.Opt.Arity"
type Arity = Int

-- | Representation Arity
--
-- The number of represented arguments that can be applied to a value before it does
-- "real work". So:
--  fib 100                    has representation arity 0
--  \x -> fib x                has representation arity 1
--  \(# x, y #) -> fib (x + y) has representation arity 2
type RepArity = Int

-- | The number of arguments that a join point takes. Unlike the arity of a
-- function, this is a purely syntactic property and is fixed when the join
-- point is created (or converted from a value). Both type and value arguments
-- are counted.
type JoinArity = Int

{-
************************************************************************
*                                                                      *
              Constructor tags
*                                                                      *
************************************************************************
-}

-- | Constructor Tag
--
-- Type of the tags associated with each constructor possibility or superclass
-- selector
type ConTag = Int

-- | A *zero-indexed* constructor tag
type ConTagZ = Int

fIRST_TAG :: ConTag
-- ^ Tags are allocated from here for real constructors
--   or for superclass selectors
fIRST_TAG :: Int
fIRST_TAG =  Int
1

{-
************************************************************************
*                                                                      *
\subsection[Alignment]{Alignment}
*                                                                      *
************************************************************************
-}

-- | A power-of-two alignment
newtype Alignment = Alignment { Alignment -> Int
alignmentBytes :: Int } deriving (Alignment -> Alignment -> Bool
(Alignment -> Alignment -> Bool)
-> (Alignment -> Alignment -> Bool) -> Eq Alignment
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Alignment -> Alignment -> Bool
$c/= :: Alignment -> Alignment -> Bool
== :: Alignment -> Alignment -> Bool
$c== :: Alignment -> Alignment -> Bool
Eq, Eq Alignment
Eq Alignment
-> (Alignment -> Alignment -> Ordering)
-> (Alignment -> Alignment -> Bool)
-> (Alignment -> Alignment -> Bool)
-> (Alignment -> Alignment -> Bool)
-> (Alignment -> Alignment -> Bool)
-> (Alignment -> Alignment -> Alignment)
-> (Alignment -> Alignment -> Alignment)
-> Ord Alignment
Alignment -> Alignment -> Bool
Alignment -> Alignment -> Ordering
Alignment -> Alignment -> Alignment
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 :: Alignment -> Alignment -> Alignment
$cmin :: Alignment -> Alignment -> Alignment
max :: Alignment -> Alignment -> Alignment
$cmax :: Alignment -> Alignment -> Alignment
>= :: Alignment -> Alignment -> Bool
$c>= :: Alignment -> Alignment -> Bool
> :: Alignment -> Alignment -> Bool
$c> :: Alignment -> Alignment -> Bool
<= :: Alignment -> Alignment -> Bool
$c<= :: Alignment -> Alignment -> Bool
< :: Alignment -> Alignment -> Bool
$c< :: Alignment -> Alignment -> Bool
compare :: Alignment -> Alignment -> Ordering
$ccompare :: Alignment -> Alignment -> Ordering
Ord)

-- Builds an alignment, throws on non power of 2 input. This is not
-- ideal, but convenient for internal use and better then silently
-- passing incorrect data.
mkAlignment :: Int -> Alignment
mkAlignment :: Int -> Alignment
mkAlignment Int
n
  | Int
n Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
1 = Int -> Alignment
Alignment Int
1
  | Int
n Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
2 = Int -> Alignment
Alignment Int
2
  | Int
n Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
4 = Int -> Alignment
Alignment Int
4
  | Int
n Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
8 = Int -> Alignment
Alignment Int
8
  | Int
n Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
16 = Int -> Alignment
Alignment Int
16
  | Int
n Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
32 = Int -> Alignment
Alignment Int
32
  | Int
n Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
64 = Int -> Alignment
Alignment Int
64
  | Int
n Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
128 = Int -> Alignment
Alignment Int
128
  | Int
n Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
256 = Int -> Alignment
Alignment Int
256
  | Int
n Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
512 = Int -> Alignment
Alignment Int
512
  | Bool
otherwise = String -> Alignment
forall a. String -> a
panic String
"mkAlignment: received either a non power of 2 argument or > 512"

-- Calculates an alignment of a number. x is aligned at N bytes means
-- the remainder from x / N is zero. Currently, interested in N <= 8,
-- but can be expanded to N <= 16 or N <= 32 if used within SSE or AVX
-- context.
alignmentOf :: Int -> Alignment
alignmentOf :: Int -> Alignment
alignmentOf Int
x = case Int
x Int -> Int -> Int
forall a. Bits a => a -> a -> a
.&. Int
7 of
  Int
0 -> Int -> Alignment
Alignment Int
8
  Int
4 -> Int -> Alignment
Alignment Int
4
  Int
2 -> Int -> Alignment
Alignment Int
2
  Int
_ -> Int -> Alignment
Alignment Int
1

instance Outputable Alignment where
  ppr :: Alignment -> SDoc
ppr (Alignment Int
m) = Int -> SDoc
forall a. Outputable a => a -> SDoc
ppr Int
m
{-
************************************************************************
*                                                                      *
         One-shot information
*                                                                      *
************************************************************************
-}

{-
Note [OneShotInfo overview]
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lambda-bound Ids (and only lambda-bound Ids) may be decorated with
one-shot info.  The idea is that if we see
    (\x{one-shot}. e)
it means that this lambda will only be applied once.  In particular
that means we can float redexes under the lambda without losing
work.  For example, consider
    let t = expensive in
    (\x{one-shot}. case t of { True -> ...; False -> ... })

Because it's a one-shot lambda, we can safely inline t, giving
    (\x{one_shot}. case <expensive> of
                       { True -> ...; False -> ... })

Moving parts:

* Usage analysis, performed as part of demand-analysis, finds
  out whether functions call their argument once.  Consider
     f g x = Just (case g x of { ... })

  Here 'f' is lazy in 'g', but it guarantees to call it no
  more than once.  So g will get a C1(U) usage demand.

* Occurrence analysis propagates this usage information
  (in the demand signature of a function) to its calls.
  Example, given 'f' above
     f (\x.e) blah

  Since f's demand signature says it has a C1(U) usage demand on its
  first argument, the occurrence analyser sets the \x to be one-shot.
  This is done via the occ_one_shots field of OccEnv.

* Float-in and float-out take account of one-shot-ness

* Occurrence analysis doesn't set "inside-lam" for occurrences inside
  a one-shot lambda

Other notes

* A one-shot lambda can use its argument many times.  To elaborate
  the example above
    let t = expensive in
    (\x{one-shot}. case t of { True -> x+x; False -> x*x })

  Here the '\x' is one-shot, which justifies inlining 't',
  but x is used many times. That's absolutely fine.

* It's entirely possible to have
     (\x{one-shot}. \y{many-shot}. e)

  For example
     let t = expensive
         g = \x -> let v = x+t in
             \y -> x + v
     in map (g 5) xs

  Here the `\x` is a one-shot binder: `g` is applied to one argument
  exactly once.  And because the `\x` is one-shot, it would be fine to
  float that `let t = expensive` binding inside the `\x`.

  But the `\y` is most definitely not one-shot!
-}

-- | If the 'Id' is a lambda-bound variable then it may have lambda-bound
-- variable info. Sometimes we know whether the lambda binding this variable
-- is a "one-shot" lambda; that is, whether it is applied at most once.
--
-- This information may be useful in optimisation, as computations may
-- safely be floated inside such a lambda without risk of duplicating
-- work.
--
-- See also Note [OneShotInfo overview] above.
data OneShotInfo
  = NoOneShotInfo -- ^ No information
  | OneShotLam    -- ^ The lambda is applied at most once.
  deriving (OneShotInfo -> OneShotInfo -> Bool
(OneShotInfo -> OneShotInfo -> Bool)
-> (OneShotInfo -> OneShotInfo -> Bool) -> Eq OneShotInfo
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: OneShotInfo -> OneShotInfo -> Bool
$c/= :: OneShotInfo -> OneShotInfo -> Bool
== :: OneShotInfo -> OneShotInfo -> Bool
$c== :: OneShotInfo -> OneShotInfo -> Bool
Eq)

-- | It is always safe to assume that an 'Id' has no lambda-bound variable information
noOneShotInfo :: OneShotInfo
noOneShotInfo :: OneShotInfo
noOneShotInfo = OneShotInfo
NoOneShotInfo

isOneShotInfo, hasNoOneShotInfo :: OneShotInfo -> Bool
isOneShotInfo :: OneShotInfo -> Bool
isOneShotInfo OneShotInfo
OneShotLam = Bool
True
isOneShotInfo OneShotInfo
_          = Bool
False

hasNoOneShotInfo :: OneShotInfo -> Bool
hasNoOneShotInfo OneShotInfo
NoOneShotInfo = Bool
True
hasNoOneShotInfo OneShotInfo
_             = Bool
False

worstOneShot, bestOneShot :: OneShotInfo -> OneShotInfo -> OneShotInfo
worstOneShot :: OneShotInfo -> OneShotInfo -> OneShotInfo
worstOneShot OneShotInfo
NoOneShotInfo OneShotInfo
_             = OneShotInfo
NoOneShotInfo
worstOneShot OneShotInfo
OneShotLam    OneShotInfo
os            = OneShotInfo
os

bestOneShot :: OneShotInfo -> OneShotInfo -> OneShotInfo
bestOneShot OneShotInfo
NoOneShotInfo OneShotInfo
os         = OneShotInfo
os
bestOneShot OneShotInfo
OneShotLam    OneShotInfo
_          = OneShotInfo
OneShotLam

pprOneShotInfo :: OneShotInfo -> SDoc
pprOneShotInfo :: OneShotInfo -> SDoc
pprOneShotInfo OneShotInfo
NoOneShotInfo = SDoc
empty
pprOneShotInfo OneShotInfo
OneShotLam    = String -> SDoc
text String
"OneShot"

instance Outputable OneShotInfo where
    ppr :: OneShotInfo -> SDoc
ppr = OneShotInfo -> SDoc
pprOneShotInfo

{-
************************************************************************
*                                                                      *
           Swap flag
*                                                                      *
************************************************************************
-}

data SwapFlag
  = NotSwapped  -- Args are: actual,   expected
  | IsSwapped   -- Args are: expected, actual

instance Outputable SwapFlag where
  ppr :: SwapFlag -> SDoc
ppr SwapFlag
IsSwapped  = String -> SDoc
text String
"Is-swapped"
  ppr SwapFlag
NotSwapped = String -> SDoc
text String
"Not-swapped"

flipSwap :: SwapFlag -> SwapFlag
flipSwap :: SwapFlag -> SwapFlag
flipSwap SwapFlag
IsSwapped  = SwapFlag
NotSwapped
flipSwap SwapFlag
NotSwapped = SwapFlag
IsSwapped

isSwapped :: SwapFlag -> Bool
isSwapped :: SwapFlag -> Bool
isSwapped SwapFlag
IsSwapped  = Bool
True
isSwapped SwapFlag
NotSwapped = Bool
False

unSwap :: SwapFlag -> (a->a->b) -> a -> a -> b
unSwap :: forall a b. SwapFlag -> (a -> a -> b) -> a -> a -> b
unSwap SwapFlag
NotSwapped a -> a -> b
f a
a a
b = a -> a -> b
f a
a a
b
unSwap SwapFlag
IsSwapped  a -> a -> b
f a
a a
b = a -> a -> b
f a
b a
a


{- *********************************************************************
*                                                                      *
           Promotion flag
*                                                                      *
********************************************************************* -}

-- | Is a TyCon a promoted data constructor or just a normal type constructor?
data PromotionFlag
  = NotPromoted
  | IsPromoted
  deriving ( PromotionFlag -> PromotionFlag -> Bool
(PromotionFlag -> PromotionFlag -> Bool)
-> (PromotionFlag -> PromotionFlag -> Bool) -> Eq PromotionFlag
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: PromotionFlag -> PromotionFlag -> Bool
$c/= :: PromotionFlag -> PromotionFlag -> Bool
== :: PromotionFlag -> PromotionFlag -> Bool
$c== :: PromotionFlag -> PromotionFlag -> Bool
Eq, Typeable PromotionFlag
Typeable PromotionFlag
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isPromoted :: PromotionFlag -> Bool
isPromoted :: PromotionFlag -> Bool
isPromoted PromotionFlag
IsPromoted  = Bool
True
isPromoted PromotionFlag
NotPromoted = Bool
False

instance Outputable PromotionFlag where
  ppr :: PromotionFlag -> SDoc
ppr PromotionFlag
NotPromoted = String -> SDoc
text String
"NotPromoted"
  ppr PromotionFlag
IsPromoted  = String -> SDoc
text String
"IsPromoted"

{-
************************************************************************
*                                                                      *
\subsection[FunctionOrData]{FunctionOrData}
*                                                                      *
************************************************************************
-}

data FunctionOrData = IsFunction | IsData
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instance Outputable FunctionOrData where
    ppr :: FunctionOrData -> SDoc
ppr FunctionOrData
IsFunction = String -> SDoc
text String
"(function)"
    ppr FunctionOrData
IsData     = String -> SDoc
text String
"(data)"

{-
************************************************************************
*                                                                      *
                Deprecations
*                                                                      *
************************************************************************
-}

-- | A String Literal in the source, including its original raw format for use by
-- source to source manipulation tools.
data StringLiteral = StringLiteral
                       { StringLiteral -> SourceText
sl_st :: SourceText, -- literal raw source.
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sl_fs :: FastString  -- literal string value
                       } deriving Typeable StringLiteral
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$cgmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> StringLiteral -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> StringLiteral -> r
$cgmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> StringLiteral -> r
gmapT :: (forall b. Data b => b -> b) -> StringLiteral -> StringLiteral
$cgmapT :: (forall b. Data b => b -> b) -> StringLiteral -> StringLiteral
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c StringLiteral)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c StringLiteral)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c StringLiteral)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c StringLiteral)
dataTypeOf :: StringLiteral -> DataType
$cdataTypeOf :: StringLiteral -> DataType
toConstr :: StringLiteral -> Constr
$ctoConstr :: StringLiteral -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c StringLiteral
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c StringLiteral
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> StringLiteral -> c StringLiteral
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> StringLiteral -> c StringLiteral
Data

instance Eq StringLiteral where
  (StringLiteral SourceText
_ FastString
a) == :: StringLiteral -> StringLiteral -> Bool
== (StringLiteral SourceText
_ FastString
b) = FastString
a FastString -> FastString -> Bool
forall a. Eq a => a -> a -> Bool
== FastString
b

instance Outputable StringLiteral where
  ppr :: StringLiteral -> SDoc
ppr StringLiteral
sl = SourceText -> SDoc -> SDoc
pprWithSourceText (StringLiteral -> SourceText
sl_st StringLiteral
sl) (FastString -> SDoc
ftext (FastString -> SDoc) -> FastString -> SDoc
forall a b. (a -> b) -> a -> b
$ StringLiteral -> FastString
sl_fs StringLiteral
sl)

-- | Warning Text
--
-- reason/explanation from a WARNING or DEPRECATED pragma
data WarningTxt = WarningTxt (Located SourceText)
                             [Located StringLiteral]
                | DeprecatedTxt (Located SourceText)
                                [Located StringLiteral]
    deriving (WarningTxt -> WarningTxt -> Bool
(WarningTxt -> WarningTxt -> Bool)
-> (WarningTxt -> WarningTxt -> Bool) -> Eq WarningTxt
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: WarningTxt -> WarningTxt -> Bool
$c/= :: WarningTxt -> WarningTxt -> Bool
== :: WarningTxt -> WarningTxt -> Bool
$c== :: WarningTxt -> WarningTxt -> Bool
Eq, Typeable WarningTxt
Typeable WarningTxt
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> WarningTxt -> c WarningTxt)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c WarningTxt)
-> (WarningTxt -> Constr)
-> (WarningTxt -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c WarningTxt))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e))
    -> Maybe (c WarningTxt))
-> ((forall b. Data b => b -> b) -> WarningTxt -> WarningTxt)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> WarningTxt -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> WarningTxt -> r)
-> (forall u. (forall d. Data d => d -> u) -> WarningTxt -> [u])
-> (forall u.
    Int -> (forall d. Data d => d -> u) -> WarningTxt -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> WarningTxt -> m WarningTxt)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> WarningTxt -> m WarningTxt)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> WarningTxt -> m WarningTxt)
-> Data WarningTxt
WarningTxt -> DataType
WarningTxt -> Constr
(forall b. Data b => b -> b) -> WarningTxt -> WarningTxt
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) -> WarningTxt -> u
forall u. (forall d. Data d => d -> u) -> WarningTxt -> [u]
forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> WarningTxt -> r
forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> WarningTxt -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> WarningTxt -> m WarningTxt
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> WarningTxt -> m WarningTxt
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c WarningTxt
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> WarningTxt -> c WarningTxt
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c WarningTxt)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c WarningTxt)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> WarningTxt -> m WarningTxt
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> WarningTxt -> m WarningTxt
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> WarningTxt -> m WarningTxt
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> WarningTxt -> m WarningTxt
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> WarningTxt -> m WarningTxt
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> WarningTxt -> m WarningTxt
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> WarningTxt -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> WarningTxt -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> WarningTxt -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> WarningTxt -> [u]
gmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> WarningTxt -> r
$cgmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> WarningTxt -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> WarningTxt -> r
$cgmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> WarningTxt -> r
gmapT :: (forall b. Data b => b -> b) -> WarningTxt -> WarningTxt
$cgmapT :: (forall b. Data b => b -> b) -> WarningTxt -> WarningTxt
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c WarningTxt)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c WarningTxt)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c WarningTxt)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c WarningTxt)
dataTypeOf :: WarningTxt -> DataType
$cdataTypeOf :: WarningTxt -> DataType
toConstr :: WarningTxt -> Constr
$ctoConstr :: WarningTxt -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c WarningTxt
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c WarningTxt
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> WarningTxt -> c WarningTxt
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> WarningTxt -> c WarningTxt
Data)

instance Outputable WarningTxt where
    ppr :: WarningTxt -> SDoc
ppr (WarningTxt    Located SourceText
lsrc [Located StringLiteral]
ws)
      = case Located SourceText -> SourceText
forall l e. GenLocated l e -> e
unLoc Located SourceText
lsrc of
          SourceText
NoSourceText   -> [Located StringLiteral] -> SDoc
pp_ws [Located StringLiteral]
ws
          SourceText String
src -> String -> SDoc
text String
src SDoc -> SDoc -> SDoc
<+> [Located StringLiteral] -> SDoc
pp_ws [Located StringLiteral]
ws SDoc -> SDoc -> SDoc
<+> String -> SDoc
text String
"#-}"

    ppr (DeprecatedTxt Located SourceText
lsrc  [Located StringLiteral]
ds)
      = case Located SourceText -> SourceText
forall l e. GenLocated l e -> e
unLoc Located SourceText
lsrc of
          SourceText
NoSourceText   -> [Located StringLiteral] -> SDoc
pp_ws [Located StringLiteral]
ds
          SourceText String
src -> String -> SDoc
text String
src SDoc -> SDoc -> SDoc
<+> [Located StringLiteral] -> SDoc
pp_ws [Located StringLiteral]
ds SDoc -> SDoc -> SDoc
<+> String -> SDoc
text String
"#-}"

pp_ws :: [Located StringLiteral] -> SDoc
pp_ws :: [Located StringLiteral] -> SDoc
pp_ws [Located StringLiteral
l] = StringLiteral -> SDoc
forall a. Outputable a => a -> SDoc
ppr (StringLiteral -> SDoc) -> StringLiteral -> SDoc
forall a b. (a -> b) -> a -> b
$ Located StringLiteral -> StringLiteral
forall l e. GenLocated l e -> e
unLoc Located StringLiteral
l
pp_ws [Located StringLiteral]
ws
  = String -> SDoc
text String
"["
    SDoc -> SDoc -> SDoc
<+> [SDoc] -> SDoc
vcat (SDoc -> [SDoc] -> [SDoc]
punctuate SDoc
comma ((Located StringLiteral -> SDoc)
-> [Located StringLiteral] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (StringLiteral -> SDoc
forall a. Outputable a => a -> SDoc
ppr (StringLiteral -> SDoc)
-> (Located StringLiteral -> StringLiteral)
-> Located StringLiteral
-> SDoc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Located StringLiteral -> StringLiteral
forall l e. GenLocated l e -> e
unLoc) [Located StringLiteral]
ws))
    SDoc -> SDoc -> SDoc
<+> String -> SDoc
text String
"]"


pprWarningTxtForMsg :: WarningTxt -> SDoc
pprWarningTxtForMsg :: WarningTxt -> SDoc
pprWarningTxtForMsg (WarningTxt    Located SourceText
_ [Located StringLiteral]
ws)
                     = SDoc -> SDoc
doubleQuotes ([SDoc] -> SDoc
vcat ((Located StringLiteral -> SDoc)
-> [Located StringLiteral] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (FastString -> SDoc
ftext (FastString -> SDoc)
-> (Located StringLiteral -> FastString)
-> Located StringLiteral
-> SDoc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. StringLiteral -> FastString
sl_fs (StringLiteral -> FastString)
-> (Located StringLiteral -> StringLiteral)
-> Located StringLiteral
-> FastString
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Located StringLiteral -> StringLiteral
forall l e. GenLocated l e -> e
unLoc) [Located StringLiteral]
ws))
pprWarningTxtForMsg (DeprecatedTxt Located SourceText
_ [Located StringLiteral]
ds)
                     = String -> SDoc
text String
"Deprecated:" SDoc -> SDoc -> SDoc
<+>
                       SDoc -> SDoc
doubleQuotes ([SDoc] -> SDoc
vcat ((Located StringLiteral -> SDoc)
-> [Located StringLiteral] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (FastString -> SDoc
ftext (FastString -> SDoc)
-> (Located StringLiteral -> FastString)
-> Located StringLiteral
-> SDoc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. StringLiteral -> FastString
sl_fs (StringLiteral -> FastString)
-> (Located StringLiteral -> StringLiteral)
-> Located StringLiteral
-> FastString
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Located StringLiteral -> StringLiteral
forall l e. GenLocated l e -> e
unLoc) [Located StringLiteral]
ds))

{-
************************************************************************
*                                                                      *
                Rules
*                                                                      *
************************************************************************
-}

type RuleName = FastString

pprRuleName :: RuleName -> SDoc
pprRuleName :: FastString -> SDoc
pprRuleName FastString
rn = SDoc -> SDoc
doubleQuotes (FastString -> SDoc
ftext FastString
rn)

{-
************************************************************************
*                                                                      *
\subsection[Fixity]{Fixity info}
*                                                                      *
************************************************************************
-}

------------------------
data Fixity = Fixity SourceText Int FixityDirection
  -- Note [Pragma source text]
  deriving Typeable Fixity
Typeable Fixity
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> Fixity -> c Fixity)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c Fixity)
-> (Fixity -> Constr)
-> (Fixity -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c Fixity))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Fixity))
-> ((forall b. Data b => b -> b) -> Fixity -> Fixity)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> Fixity -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> Fixity -> r)
-> (forall u. (forall d. Data d => d -> u) -> Fixity -> [u])
-> (forall u. Int -> (forall d. Data d => d -> u) -> Fixity -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> Fixity -> m Fixity)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> Fixity -> m Fixity)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> Fixity -> m Fixity)
-> Data Fixity
Fixity -> DataType
Fixity -> Constr
(forall b. Data b => b -> b) -> Fixity -> Fixity
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) -> Fixity -> u
forall u. (forall d. Data d => d -> u) -> Fixity -> [u]
forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Fixity -> r
forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Fixity -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Fixity -> m Fixity
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Fixity -> m Fixity
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Fixity
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Fixity -> c Fixity
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Fixity)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Fixity)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Fixity -> m Fixity
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Fixity -> m Fixity
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Fixity -> m Fixity
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Fixity -> m Fixity
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Fixity -> m Fixity
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Fixity -> m Fixity
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Fixity -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Fixity -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> Fixity -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> Fixity -> [u]
gmapQr :: forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Fixity -> r
$cgmapQr :: forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Fixity -> r
gmapQl :: forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Fixity -> r
$cgmapQl :: forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Fixity -> r
gmapT :: (forall b. Data b => b -> b) -> Fixity -> Fixity
$cgmapT :: (forall b. Data b => b -> b) -> Fixity -> Fixity
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Fixity)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Fixity)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Fixity)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Fixity)
dataTypeOf :: Fixity -> DataType
$cdataTypeOf :: Fixity -> DataType
toConstr :: Fixity -> Constr
$ctoConstr :: Fixity -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Fixity
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Fixity
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Fixity -> c Fixity
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Fixity -> c Fixity
Data

instance Outputable Fixity where
    ppr :: Fixity -> SDoc
ppr (Fixity SourceText
_ Int
prec FixityDirection
dir) = [SDoc] -> SDoc
hcat [FixityDirection -> SDoc
forall a. Outputable a => a -> SDoc
ppr FixityDirection
dir, SDoc
space, Int -> SDoc
int Int
prec]

instance Eq Fixity where -- Used to determine if two fixities conflict
  (Fixity SourceText
_ Int
p1 FixityDirection
dir1) == :: Fixity -> Fixity -> Bool
== (Fixity SourceText
_ Int
p2 FixityDirection
dir2) = Int
p1Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
==Int
p2 Bool -> Bool -> Bool
&& FixityDirection
dir1 FixityDirection -> FixityDirection -> Bool
forall a. Eq a => a -> a -> Bool
== FixityDirection
dir2

------------------------
data FixityDirection = InfixL | InfixR | InfixN
                     deriving (FixityDirection -> FixityDirection -> Bool
(FixityDirection -> FixityDirection -> Bool)
-> (FixityDirection -> FixityDirection -> Bool)
-> Eq FixityDirection
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: FixityDirection -> FixityDirection -> Bool
$c/= :: FixityDirection -> FixityDirection -> Bool
== :: FixityDirection -> FixityDirection -> Bool
$c== :: FixityDirection -> FixityDirection -> Bool
Eq, Typeable FixityDirection
Typeable FixityDirection
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> FixityDirection -> c FixityDirection)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c FixityDirection)
-> (FixityDirection -> Constr)
-> (FixityDirection -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c FixityDirection))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e))
    -> Maybe (c FixityDirection))
-> ((forall b. Data b => b -> b)
    -> FixityDirection -> FixityDirection)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> FixityDirection -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> FixityDirection -> r)
-> (forall u.
    (forall d. Data d => d -> u) -> FixityDirection -> [u])
-> (forall u.
    Int -> (forall d. Data d => d -> u) -> FixityDirection -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d)
    -> FixityDirection -> m FixityDirection)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d)
    -> FixityDirection -> m FixityDirection)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d)
    -> FixityDirection -> m FixityDirection)
-> Data FixityDirection
FixityDirection -> DataType
FixityDirection -> Constr
(forall b. Data b => b -> b) -> FixityDirection -> FixityDirection
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) -> FixityDirection -> u
forall u. (forall d. Data d => d -> u) -> FixityDirection -> [u]
forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> FixityDirection -> r
forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> FixityDirection -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d)
-> FixityDirection -> m FixityDirection
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d)
-> FixityDirection -> m FixityDirection
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c FixityDirection
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> FixityDirection -> c FixityDirection
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c FixityDirection)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c FixityDirection)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d)
-> FixityDirection -> m FixityDirection
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d)
-> FixityDirection -> m FixityDirection
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d)
-> FixityDirection -> m FixityDirection
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d)
-> FixityDirection -> m FixityDirection
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d)
-> FixityDirection -> m FixityDirection
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d)
-> FixityDirection -> m FixityDirection
gmapQi :: forall u.
Int -> (forall d. Data d => d -> u) -> FixityDirection -> u
$cgmapQi :: forall u.
Int -> (forall d. Data d => d -> u) -> FixityDirection -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> FixityDirection -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> FixityDirection -> [u]
gmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> FixityDirection -> r
$cgmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> FixityDirection -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> FixityDirection -> r
$cgmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> FixityDirection -> r
gmapT :: (forall b. Data b => b -> b) -> FixityDirection -> FixityDirection
$cgmapT :: (forall b. Data b => b -> b) -> FixityDirection -> FixityDirection
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c FixityDirection)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c FixityDirection)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c FixityDirection)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c FixityDirection)
dataTypeOf :: FixityDirection -> DataType
$cdataTypeOf :: FixityDirection -> DataType
toConstr :: FixityDirection -> Constr
$ctoConstr :: FixityDirection -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c FixityDirection
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c FixityDirection
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> FixityDirection -> c FixityDirection
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> FixityDirection -> c FixityDirection
Data)

instance Outputable FixityDirection where
    ppr :: FixityDirection -> SDoc
ppr FixityDirection
InfixL = String -> SDoc
text String
"infixl"
    ppr FixityDirection
InfixR = String -> SDoc
text String
"infixr"
    ppr FixityDirection
InfixN = String -> SDoc
text String
"infix"

------------------------
maxPrecedence, minPrecedence :: Int
maxPrecedence :: Int
maxPrecedence = Int
9
minPrecedence :: Int
minPrecedence = Int
0

defaultFixity :: Fixity
defaultFixity :: Fixity
defaultFixity = SourceText -> Int -> FixityDirection -> Fixity
Fixity SourceText
NoSourceText Int
maxPrecedence FixityDirection
InfixL

negateFixity, funTyFixity :: Fixity
-- Wired-in fixities
negateFixity :: Fixity
negateFixity = SourceText -> Int -> FixityDirection -> Fixity
Fixity SourceText
NoSourceText Int
6 FixityDirection
InfixL  -- Fixity of unary negate
funTyFixity :: Fixity
funTyFixity  = SourceText -> Int -> FixityDirection -> Fixity
Fixity SourceText
NoSourceText (-Int
1) FixityDirection
InfixR  -- Fixity of '->', see #15235

{-
Consider

\begin{verbatim}
        a `op1` b `op2` c
\end{verbatim}
@(compareFixity op1 op2)@ tells which way to arrange application, or
whether there's an error.
-}

compareFixity :: Fixity -> Fixity
              -> (Bool,         -- Error please
                  Bool)         -- Associate to the right: a op1 (b op2 c)
compareFixity :: Fixity -> Fixity -> (Bool, Bool)
compareFixity (Fixity SourceText
_ Int
prec1 FixityDirection
dir1) (Fixity SourceText
_ Int
prec2 FixityDirection
dir2)
  = case Int
prec1 Int -> Int -> Ordering
forall a. Ord a => a -> a -> Ordering
`compare` Int
prec2 of
        Ordering
GT -> (Bool, Bool)
left
        Ordering
LT -> (Bool, Bool)
right
        Ordering
EQ -> case (FixityDirection
dir1, FixityDirection
dir2) of
                        (FixityDirection
InfixR, FixityDirection
InfixR) -> (Bool, Bool)
right
                        (FixityDirection
InfixL, FixityDirection
InfixL) -> (Bool, Bool)
left
                        (FixityDirection, FixityDirection)
_                -> (Bool, Bool)
error_please
  where
    right :: (Bool, Bool)
right        = (Bool
False, Bool
True)
    left :: (Bool, Bool)
left         = (Bool
False, Bool
False)
    error_please :: (Bool, Bool)
error_please = (Bool
True,  Bool
False)

-- |Captures the fixity of declarations as they are parsed. This is not
-- necessarily the same as the fixity declaration, as the normal fixity may be
-- overridden using parens or backticks.
data LexicalFixity = Prefix | Infix deriving (Typeable LexicalFixity
Typeable LexicalFixity
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> LexicalFixity -> c LexicalFixity)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c LexicalFixity)
-> (LexicalFixity -> Constr)
-> (LexicalFixity -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c LexicalFixity))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e))
    -> Maybe (c LexicalFixity))
-> ((forall b. Data b => b -> b) -> LexicalFixity -> LexicalFixity)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> LexicalFixity -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> LexicalFixity -> r)
-> (forall u. (forall d. Data d => d -> u) -> LexicalFixity -> [u])
-> (forall u.
    Int -> (forall d. Data d => d -> u) -> LexicalFixity -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> LexicalFixity -> m LexicalFixity)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> LexicalFixity -> m LexicalFixity)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> LexicalFixity -> m LexicalFixity)
-> Data LexicalFixity
LexicalFixity -> DataType
LexicalFixity -> Constr
(forall b. Data b => b -> b) -> LexicalFixity -> LexicalFixity
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) -> LexicalFixity -> u
forall u. (forall d. Data d => d -> u) -> LexicalFixity -> [u]
forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> LexicalFixity -> r
forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> LexicalFixity -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> LexicalFixity -> m LexicalFixity
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> LexicalFixity -> m LexicalFixity
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c LexicalFixity
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> LexicalFixity -> c LexicalFixity
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c LexicalFixity)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c LexicalFixity)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> LexicalFixity -> m LexicalFixity
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> LexicalFixity -> m LexicalFixity
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> LexicalFixity -> m LexicalFixity
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> LexicalFixity -> m LexicalFixity
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> LexicalFixity -> m LexicalFixity
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> LexicalFixity -> m LexicalFixity
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> LexicalFixity -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> LexicalFixity -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> LexicalFixity -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> LexicalFixity -> [u]
gmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> LexicalFixity -> r
$cgmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> LexicalFixity -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> LexicalFixity -> r
$cgmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> LexicalFixity -> r
gmapT :: (forall b. Data b => b -> b) -> LexicalFixity -> LexicalFixity
$cgmapT :: (forall b. Data b => b -> b) -> LexicalFixity -> LexicalFixity
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c LexicalFixity)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c LexicalFixity)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c LexicalFixity)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c LexicalFixity)
dataTypeOf :: LexicalFixity -> DataType
$cdataTypeOf :: LexicalFixity -> DataType
toConstr :: LexicalFixity -> Constr
$ctoConstr :: LexicalFixity -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c LexicalFixity
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c LexicalFixity
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> LexicalFixity -> c LexicalFixity
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> LexicalFixity -> c LexicalFixity
Data,LexicalFixity -> LexicalFixity -> Bool
(LexicalFixity -> LexicalFixity -> Bool)
-> (LexicalFixity -> LexicalFixity -> Bool) -> Eq LexicalFixity
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: LexicalFixity -> LexicalFixity -> Bool
$c/= :: LexicalFixity -> LexicalFixity -> Bool
== :: LexicalFixity -> LexicalFixity -> Bool
$c== :: LexicalFixity -> LexicalFixity -> Bool
Eq)

instance Outputable LexicalFixity where
  ppr :: LexicalFixity -> SDoc
ppr LexicalFixity
Prefix = String -> SDoc
text String
"Prefix"
  ppr LexicalFixity
Infix  = String -> SDoc
text String
"Infix"

{-
************************************************************************
*                                                                      *
\subsection[Top-level/local]{Top-level/not-top level flag}
*                                                                      *
************************************************************************
-}

data TopLevelFlag
  = TopLevel
  | NotTopLevel

isTopLevel, isNotTopLevel :: TopLevelFlag -> Bool

isNotTopLevel :: TopLevelFlag -> Bool
isNotTopLevel TopLevelFlag
NotTopLevel = Bool
True
isNotTopLevel TopLevelFlag
TopLevel    = Bool
False

isTopLevel :: TopLevelFlag -> Bool
isTopLevel TopLevelFlag
TopLevel     = Bool
True
isTopLevel TopLevelFlag
NotTopLevel  = Bool
False

instance Outputable TopLevelFlag where
  ppr :: TopLevelFlag -> SDoc
ppr TopLevelFlag
TopLevel    = String -> SDoc
text String
"<TopLevel>"
  ppr TopLevelFlag
NotTopLevel = String -> SDoc
text String
"<NotTopLevel>"

{-
************************************************************************
*                                                                      *
                Boxity flag
*                                                                      *
************************************************************************
-}

data Boxity
  = Boxed
  | Unboxed
  deriving( Boxity -> Boxity -> Bool
(Boxity -> Boxity -> Bool)
-> (Boxity -> Boxity -> Bool) -> Eq Boxity
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Boxity -> Boxity -> Bool
$c/= :: Boxity -> Boxity -> Bool
== :: Boxity -> Boxity -> Bool
$c== :: Boxity -> Boxity -> Bool
Eq, Typeable Boxity
Typeable Boxity
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> Boxity -> c Boxity)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c Boxity)
-> (Boxity -> Constr)
-> (Boxity -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c Boxity))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Boxity))
-> ((forall b. Data b => b -> b) -> Boxity -> Boxity)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> Boxity -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> Boxity -> r)
-> (forall u. (forall d. Data d => d -> u) -> Boxity -> [u])
-> (forall u. Int -> (forall d. Data d => d -> u) -> Boxity -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> Boxity -> m Boxity)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> Boxity -> m Boxity)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> Boxity -> m Boxity)
-> Data Boxity
Boxity -> DataType
Boxity -> Constr
(forall b. Data b => b -> b) -> Boxity -> Boxity
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) -> Boxity -> u
forall u. (forall d. Data d => d -> u) -> Boxity -> [u]
forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Boxity -> r
forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Boxity -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Boxity -> m Boxity
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Boxity -> m Boxity
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Boxity
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Boxity -> c Boxity
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Boxity)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
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gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Boxity -> m Boxity
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Boxity -> m Boxity
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Boxity -> m Boxity
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Boxity -> m Boxity
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Boxity -> m Boxity
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Boxity -> m Boxity
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Boxity -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Boxity -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> Boxity -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> Boxity -> [u]
gmapQr :: forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Boxity -> r
$cgmapQr :: forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Boxity -> r
gmapQl :: forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Boxity -> r
$cgmapQl :: forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Boxity -> r
gmapT :: (forall b. Data b => b -> b) -> Boxity -> Boxity
$cgmapT :: (forall b. Data b => b -> b) -> Boxity -> Boxity
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Boxity)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Boxity)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Boxity)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Boxity)
dataTypeOf :: Boxity -> DataType
$cdataTypeOf :: Boxity -> DataType
toConstr :: Boxity -> Constr
$ctoConstr :: Boxity -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Boxity
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Boxity
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Boxity -> c Boxity
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Boxity -> c Boxity
Data )

isBoxed :: Boxity -> Bool
isBoxed :: Boxity -> Bool
isBoxed Boxity
Boxed   = Bool
True
isBoxed Boxity
Unboxed = Bool
False

instance Outputable Boxity where
  ppr :: Boxity -> SDoc
ppr Boxity
Boxed   = String -> SDoc
text String
"Boxed"
  ppr Boxity
Unboxed = String -> SDoc
text String
"Unboxed"

{-
************************************************************************
*                                                                      *
                Recursive/Non-Recursive flag
*                                                                      *
************************************************************************
-}

-- | Recursivity Flag
data RecFlag = Recursive
             | NonRecursive
             deriving( RecFlag -> RecFlag -> Bool
(RecFlag -> RecFlag -> Bool)
-> (RecFlag -> RecFlag -> Bool) -> Eq RecFlag
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: RecFlag -> RecFlag -> Bool
$c/= :: RecFlag -> RecFlag -> Bool
== :: RecFlag -> RecFlag -> Bool
$c== :: RecFlag -> RecFlag -> Bool
Eq, Typeable RecFlag
Typeable RecFlag
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> RecFlag -> c RecFlag)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c RecFlag)
-> (RecFlag -> Constr)
-> (RecFlag -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c RecFlag))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c RecFlag))
-> ((forall b. Data b => b -> b) -> RecFlag -> RecFlag)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> RecFlag -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> RecFlag -> r)
-> (forall u. (forall d. Data d => d -> u) -> RecFlag -> [u])
-> (forall u. Int -> (forall d. Data d => d -> u) -> RecFlag -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> RecFlag -> m RecFlag)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> RecFlag -> m RecFlag)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> RecFlag -> m RecFlag)
-> Data RecFlag
RecFlag -> DataType
RecFlag -> Constr
(forall b. Data b => b -> b) -> RecFlag -> RecFlag
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)
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    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'.
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-> (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 :: * -> *).
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    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
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    (forall d. Data d => d -> m d) -> a -> m a)
-> (forall (m :: * -> *).
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    (forall d. Data d => d -> m d) -> a -> m a)
-> Data a
forall u. Int -> (forall d. Data d => d -> u) -> RecFlag -> u
forall u. (forall d. Data d => d -> u) -> RecFlag -> [u]
forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> RecFlag -> r
forall r r'.
(r' -> r -> r)
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forall (m :: * -> *).
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(forall d. Data d => d -> m d) -> RecFlag -> m RecFlag
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> RecFlag -> m RecFlag
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c RecFlag
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> RecFlag -> c RecFlag
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c RecFlag)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
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gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> RecFlag -> m RecFlag
$cgmapMo :: forall (m :: * -> *).
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(forall d. Data d => d -> m d) -> RecFlag -> m RecFlag
gmapMp :: forall (m :: * -> *).
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(forall d. Data d => d -> m d) -> RecFlag -> m RecFlag
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> RecFlag -> m RecFlag
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> RecFlag -> m RecFlag
$cgmapM :: forall (m :: * -> *).
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(forall d. Data d => d -> m d) -> RecFlag -> m RecFlag
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> RecFlag -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> RecFlag -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> RecFlag -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> RecFlag -> [u]
gmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> RecFlag -> r
$cgmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> RecFlag -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> RecFlag -> r
$cgmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> RecFlag -> r
gmapT :: (forall b. Data b => b -> b) -> RecFlag -> RecFlag
$cgmapT :: (forall b. Data b => b -> b) -> RecFlag -> RecFlag
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c RecFlag)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c RecFlag)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c RecFlag)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c RecFlag)
dataTypeOf :: RecFlag -> DataType
$cdataTypeOf :: RecFlag -> DataType
toConstr :: RecFlag -> Constr
$ctoConstr :: RecFlag -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c RecFlag
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c RecFlag
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> RecFlag -> c RecFlag
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> RecFlag -> c RecFlag
Data )

isRec :: RecFlag -> Bool
isRec :: RecFlag -> Bool
isRec RecFlag
Recursive    = Bool
True
isRec RecFlag
NonRecursive = Bool
False

isNonRec :: RecFlag -> Bool
isNonRec :: RecFlag -> Bool
isNonRec RecFlag
Recursive    = Bool
False
isNonRec RecFlag
NonRecursive = Bool
True

boolToRecFlag :: Bool -> RecFlag
boolToRecFlag :: Bool -> RecFlag
boolToRecFlag Bool
True  = RecFlag
Recursive
boolToRecFlag Bool
False = RecFlag
NonRecursive

instance Outputable RecFlag where
  ppr :: RecFlag -> SDoc
ppr RecFlag
Recursive    = String -> SDoc
text String
"Recursive"
  ppr RecFlag
NonRecursive = String -> SDoc
text String
"NonRecursive"

{-
************************************************************************
*                                                                      *
                Code origin
*                                                                      *
************************************************************************
-}

data Origin = FromSource
            | Generated
            deriving( Origin -> Origin -> Bool
(Origin -> Origin -> Bool)
-> (Origin -> Origin -> Bool) -> Eq Origin
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Origin -> Origin -> Bool
$c/= :: Origin -> Origin -> Bool
== :: Origin -> Origin -> Bool
$c== :: Origin -> Origin -> Bool
Eq, Typeable Origin
Typeable Origin
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> Origin -> c Origin)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c Origin)
-> (Origin -> Constr)
-> (Origin -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c Origin))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Origin))
-> ((forall b. Data b => b -> b) -> Origin -> Origin)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> Origin -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> Origin -> r)
-> (forall u. (forall d. Data d => d -> u) -> Origin -> [u])
-> (forall u. Int -> (forall d. Data d => d -> u) -> Origin -> u)
-> (forall (m :: * -> *).
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    (forall d. Data d => d -> m d) -> Origin -> m Origin)
-> (forall (m :: * -> *).
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    (forall d. Data d => d -> m d) -> Origin -> m Origin)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> Origin -> m Origin)
-> Data Origin
Origin -> DataType
Origin -> Constr
(forall b. Data b => b -> b) -> Origin -> Origin
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 :: * -> *).
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    -> (forall r. r -> c r) -> Constr -> c a)
-> (a -> Constr)
-> (a -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
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    (forall d. Data d => c (t d)) -> Maybe (c a))
-> (forall (t :: * -> * -> *) (c :: * -> *).
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    (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'.
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-> (forall u. (forall d. Data d => d -> u) -> a -> [u])
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-> (forall (m :: * -> *).
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    (forall d. Data d => d -> m d) -> a -> m a)
-> Data a
forall u. Int -> (forall d. Data d => d -> u) -> Origin -> u
forall u. (forall d. Data d => d -> u) -> Origin -> [u]
forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Origin -> r
forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Origin -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Origin -> m Origin
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Origin -> m Origin
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Origin
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Origin -> c Origin
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Origin)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Origin)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Origin -> m Origin
$cgmapMo :: forall (m :: * -> *).
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(forall d. Data d => d -> m d) -> Origin -> m Origin
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Origin -> m Origin
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Origin -> m Origin
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Origin -> m Origin
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Origin -> m Origin
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Origin -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Origin -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> Origin -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> Origin -> [u]
gmapQr :: forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Origin -> r
$cgmapQr :: forall r r'.
(r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Origin -> r
gmapQl :: forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Origin -> r
$cgmapQl :: forall r r'.
(r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Origin -> r
gmapT :: (forall b. Data b => b -> b) -> Origin -> Origin
$cgmapT :: (forall b. Data b => b -> b) -> Origin -> Origin
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Origin)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Origin)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Origin)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Origin)
dataTypeOf :: Origin -> DataType
$cdataTypeOf :: Origin -> DataType
toConstr :: Origin -> Constr
$ctoConstr :: Origin -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Origin
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Origin
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Origin -> c Origin
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Origin -> c Origin
Data )

isGenerated :: Origin -> Bool
isGenerated :: Origin -> Bool
isGenerated Origin
Generated = Bool
True
isGenerated Origin
FromSource = Bool
False

instance Outputable Origin where
  ppr :: Origin -> SDoc
ppr Origin
FromSource  = String -> SDoc
text String
"FromSource"
  ppr Origin
Generated   = String -> SDoc
text String
"Generated"

{-
************************************************************************
*                                                                      *
                Instance overlap flag
*                                                                      *
************************************************************************
-}

-- | The semantics allowed for overlapping instances for a particular
-- instance. See Note [Safe Haskell isSafeOverlap] (in "GHC.Core.InstEnv") for a
-- explanation of the `isSafeOverlap` field.
--
-- - 'GHC.Parser.Annotation.AnnKeywordId' :
--      'GHC.Parser.Annotation.AnnOpen' @'\{-\# OVERLAPPABLE'@ or
--                              @'\{-\# OVERLAPPING'@ or
--                              @'\{-\# OVERLAPS'@ or
--                              @'\{-\# INCOHERENT'@,
--      'GHC.Parser.Annotation.AnnClose' @`\#-\}`@,

-- For details on above see note [Api annotations] in "GHC.Parser.Annotation"
data OverlapFlag = OverlapFlag
  { OverlapFlag -> OverlapMode
overlapMode   :: OverlapMode
  , OverlapFlag -> Bool
isSafeOverlap :: Bool
  } deriving (OverlapFlag -> OverlapFlag -> Bool
(OverlapFlag -> OverlapFlag -> Bool)
-> (OverlapFlag -> OverlapFlag -> Bool) -> Eq OverlapFlag
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: OverlapFlag -> OverlapFlag -> Bool
$c/= :: OverlapFlag -> OverlapFlag -> Bool
== :: OverlapFlag -> OverlapFlag -> Bool
$c== :: OverlapFlag -> OverlapFlag -> Bool
Eq, Typeable OverlapFlag
Typeable OverlapFlag
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> OverlapFlag -> c OverlapFlag)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c OverlapFlag)
-> (OverlapFlag -> Constr)
-> (OverlapFlag -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c OverlapFlag))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e))
    -> Maybe (c OverlapFlag))
-> ((forall b. Data b => b -> b) -> OverlapFlag -> OverlapFlag)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> OverlapFlag -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> OverlapFlag -> r)
-> (forall u. (forall d. Data d => d -> u) -> OverlapFlag -> [u])
-> (forall u.
    Int -> (forall d. Data d => d -> u) -> OverlapFlag -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> OverlapFlag -> m OverlapFlag)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> OverlapFlag -> m OverlapFlag)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> OverlapFlag -> m OverlapFlag)
-> Data OverlapFlag
OverlapFlag -> DataType
OverlapFlag -> Constr
(forall b. Data b => b -> b) -> OverlapFlag -> OverlapFlag
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) -> OverlapFlag -> u
forall u. (forall d. Data d => d -> u) -> OverlapFlag -> [u]
forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> OverlapFlag -> r
forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> OverlapFlag -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> OverlapFlag -> m OverlapFlag
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> OverlapFlag -> m OverlapFlag
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c OverlapFlag
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> OverlapFlag -> c OverlapFlag
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c OverlapFlag)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c OverlapFlag)
gmapMo :: forall (m :: * -> *).
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(forall d. Data d => d -> m d) -> OverlapFlag -> m OverlapFlag
$cgmapMo :: forall (m :: * -> *).
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(forall d. Data d => d -> m d) -> OverlapFlag -> m OverlapFlag
gmapMp :: forall (m :: * -> *).
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(forall d. Data d => d -> m d) -> OverlapFlag -> m OverlapFlag
$cgmapMp :: forall (m :: * -> *).
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gmapM :: forall (m :: * -> *).
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(forall d. Data d => d -> m d) -> OverlapFlag -> m OverlapFlag
$cgmapM :: forall (m :: * -> *).
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gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> OverlapFlag -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> OverlapFlag -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> OverlapFlag -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> OverlapFlag -> [u]
gmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> OverlapFlag -> r
$cgmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> OverlapFlag -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> OverlapFlag -> r
$cgmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> OverlapFlag -> r
gmapT :: (forall b. Data b => b -> b) -> OverlapFlag -> OverlapFlag
$cgmapT :: (forall b. Data b => b -> b) -> OverlapFlag -> OverlapFlag
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c OverlapFlag)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c OverlapFlag)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c OverlapFlag)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c OverlapFlag)
dataTypeOf :: OverlapFlag -> DataType
$cdataTypeOf :: OverlapFlag -> DataType
toConstr :: OverlapFlag -> Constr
$ctoConstr :: OverlapFlag -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c OverlapFlag
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c OverlapFlag
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> OverlapFlag -> c OverlapFlag
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> OverlapFlag -> c OverlapFlag
Data)

setOverlapModeMaybe :: OverlapFlag -> Maybe OverlapMode -> OverlapFlag
setOverlapModeMaybe :: OverlapFlag -> Maybe OverlapMode -> OverlapFlag
setOverlapModeMaybe OverlapFlag
f Maybe OverlapMode
Nothing  = OverlapFlag
f
setOverlapModeMaybe OverlapFlag
f (Just OverlapMode
m) = OverlapFlag
f { overlapMode :: OverlapMode
overlapMode = OverlapMode
m }

hasIncoherentFlag :: OverlapMode -> Bool
hasIncoherentFlag :: OverlapMode -> Bool
hasIncoherentFlag OverlapMode
mode =
  case OverlapMode
mode of
    Incoherent   SourceText
_ -> Bool
True
    OverlapMode
_              -> Bool
False

hasOverlappableFlag :: OverlapMode -> Bool
hasOverlappableFlag :: OverlapMode -> Bool
hasOverlappableFlag OverlapMode
mode =
  case OverlapMode
mode of
    Overlappable SourceText
_ -> Bool
True
    Overlaps     SourceText
_ -> Bool
True
    Incoherent   SourceText
_ -> Bool
True
    OverlapMode
_              -> Bool
False

hasOverlappingFlag :: OverlapMode -> Bool
hasOverlappingFlag :: OverlapMode -> Bool
hasOverlappingFlag OverlapMode
mode =
  case OverlapMode
mode of
    Overlapping  SourceText
_ -> Bool
True
    Overlaps     SourceText
_ -> Bool
True
    Incoherent   SourceText
_ -> Bool
True
    OverlapMode
_              -> Bool
False

data OverlapMode  -- See Note [Rules for instance lookup] in GHC.Core.InstEnv
  = NoOverlap SourceText
                  -- See Note [Pragma source text]
    -- ^ This instance must not overlap another `NoOverlap` instance.
    -- However, it may be overlapped by `Overlapping` instances,
    -- and it may overlap `Overlappable` instances.


  | Overlappable SourceText
                  -- See Note [Pragma source text]
    -- ^ Silently ignore this instance if you find a
    -- more specific one that matches the constraint
    -- you are trying to resolve
    --
    -- Example: constraint (Foo [Int])
    --   instance                      Foo [Int]
    --   instance {-# OVERLAPPABLE #-} Foo [a]
    --
    -- Since the second instance has the Overlappable flag,
    -- the first instance will be chosen (otherwise
    -- its ambiguous which to choose)


  | Overlapping SourceText
                  -- See Note [Pragma source text]
    -- ^ Silently ignore any more general instances that may be
    --   used to solve the constraint.
    --
    -- Example: constraint (Foo [Int])
    --   instance {-# OVERLAPPING #-} Foo [Int]
    --   instance                     Foo [a]
    --
    -- Since the first instance has the Overlapping flag,
    -- the second---more general---instance will be ignored (otherwise
    -- it is ambiguous which to choose)


  | Overlaps SourceText
                  -- See Note [Pragma source text]
    -- ^ Equivalent to having both `Overlapping` and `Overlappable` flags.

  | Incoherent SourceText
                  -- See Note [Pragma source text]
    -- ^ Behave like Overlappable and Overlapping, and in addition pick
    -- an arbitrary one if there are multiple matching candidates, and
    -- don't worry about later instantiation
    --
    -- Example: constraint (Foo [b])
    -- instance {-# INCOHERENT -} Foo [Int]
    -- instance                   Foo [a]
    -- Without the Incoherent flag, we'd complain that
    -- instantiating 'b' would change which instance
    -- was chosen. See also note [Incoherent instances] in "GHC.Core.InstEnv"

  deriving (OverlapMode -> OverlapMode -> Bool
(OverlapMode -> OverlapMode -> Bool)
-> (OverlapMode -> OverlapMode -> Bool) -> Eq OverlapMode
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: OverlapMode -> OverlapMode -> Bool
$c/= :: OverlapMode -> OverlapMode -> Bool
== :: OverlapMode -> OverlapMode -> Bool
$c== :: OverlapMode -> OverlapMode -> Bool
Eq, Typeable OverlapMode
Typeable OverlapMode
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> OverlapMode -> c OverlapMode)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c OverlapMode)
-> (OverlapMode -> Constr)
-> (OverlapMode -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c OverlapMode))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e))
    -> Maybe (c OverlapMode))
-> ((forall b. Data b => b -> b) -> OverlapMode -> OverlapMode)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> OverlapMode -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> OverlapMode -> r)
-> (forall u. (forall d. Data d => d -> u) -> OverlapMode -> [u])
-> (forall u.
    Int -> (forall d. Data d => d -> u) -> OverlapMode -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> OverlapMode -> m OverlapMode)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> OverlapMode -> m OverlapMode)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> OverlapMode -> m OverlapMode)
-> Data OverlapMode
OverlapMode -> DataType
OverlapMode -> Constr
(forall b. Data b => b -> b) -> OverlapMode -> OverlapMode
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) -> OverlapMode -> u
forall u. (forall d. Data d => d -> u) -> OverlapMode -> [u]
forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> OverlapMode -> r
forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> OverlapMode -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> OverlapMode -> m OverlapMode
forall (m :: * -> *).
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(forall d. Data d => d -> m d) -> OverlapMode -> m OverlapMode
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c OverlapMode
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> OverlapMode -> c OverlapMode
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c OverlapMode)
forall (t :: * -> * -> *) (c :: * -> *).
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(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c OverlapMode)
gmapMo :: forall (m :: * -> *).
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(forall d. Data d => d -> m d) -> OverlapMode -> m OverlapMode
$cgmapMo :: forall (m :: * -> *).
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(forall d. Data d => d -> m d) -> OverlapMode -> m OverlapMode
gmapMp :: forall (m :: * -> *).
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(forall d. Data d => d -> m d) -> OverlapMode -> m OverlapMode
$cgmapMp :: forall (m :: * -> *).
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(forall d. Data d => d -> m d) -> OverlapMode -> m OverlapMode
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> OverlapMode -> m OverlapMode
$cgmapM :: forall (m :: * -> *).
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(forall d. Data d => d -> m d) -> OverlapMode -> m OverlapMode
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> OverlapMode -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> OverlapMode -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> OverlapMode -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> OverlapMode -> [u]
gmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> OverlapMode -> r
$cgmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> OverlapMode -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> OverlapMode -> r
$cgmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> OverlapMode -> r
gmapT :: (forall b. Data b => b -> b) -> OverlapMode -> OverlapMode
$cgmapT :: (forall b. Data b => b -> b) -> OverlapMode -> OverlapMode
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c OverlapMode)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c OverlapMode)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c OverlapMode)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c OverlapMode)
dataTypeOf :: OverlapMode -> DataType
$cdataTypeOf :: OverlapMode -> DataType
toConstr :: OverlapMode -> Constr
$ctoConstr :: OverlapMode -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c OverlapMode
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c OverlapMode
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> OverlapMode -> c OverlapMode
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> OverlapMode -> c OverlapMode
Data)


instance Outputable OverlapFlag where
   ppr :: OverlapFlag -> SDoc
ppr OverlapFlag
flag = OverlapMode -> SDoc
forall a. Outputable a => a -> SDoc
ppr (OverlapFlag -> OverlapMode
overlapMode OverlapFlag
flag) SDoc -> SDoc -> SDoc
<+> Bool -> SDoc
pprSafeOverlap (OverlapFlag -> Bool
isSafeOverlap OverlapFlag
flag)

instance Outputable OverlapMode where
   ppr :: OverlapMode -> SDoc
ppr (NoOverlap    SourceText
_) = SDoc
empty
   ppr (Overlappable SourceText
_) = String -> SDoc
text String
"[overlappable]"
   ppr (Overlapping  SourceText
_) = String -> SDoc
text String
"[overlapping]"
   ppr (Overlaps     SourceText
_) = String -> SDoc
text String
"[overlap ok]"
   ppr (Incoherent   SourceText
_) = String -> SDoc
text String
"[incoherent]"

pprSafeOverlap :: Bool -> SDoc
pprSafeOverlap :: Bool -> SDoc
pprSafeOverlap Bool
True  = String -> SDoc
text String
"[safe]"
pprSafeOverlap Bool
False = SDoc
empty

{-
************************************************************************
*                                                                      *
                Precedence
*                                                                      *
************************************************************************
-}

-- | A general-purpose pretty-printing precedence type.
newtype PprPrec = PprPrec Int deriving (PprPrec -> PprPrec -> Bool
(PprPrec -> PprPrec -> Bool)
-> (PprPrec -> PprPrec -> Bool) -> Eq PprPrec
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: PprPrec -> PprPrec -> Bool
$c/= :: PprPrec -> PprPrec -> Bool
== :: PprPrec -> PprPrec -> Bool
$c== :: PprPrec -> PprPrec -> Bool
Eq, Eq PprPrec
Eq PprPrec
-> (PprPrec -> PprPrec -> Ordering)
-> (PprPrec -> PprPrec -> Bool)
-> (PprPrec -> PprPrec -> Bool)
-> (PprPrec -> PprPrec -> Bool)
-> (PprPrec -> PprPrec -> Bool)
-> (PprPrec -> PprPrec -> PprPrec)
-> (PprPrec -> PprPrec -> PprPrec)
-> Ord PprPrec
PprPrec -> PprPrec -> Bool
PprPrec -> PprPrec -> Ordering
PprPrec -> PprPrec -> PprPrec
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 :: PprPrec -> PprPrec -> PprPrec
$cmin :: PprPrec -> PprPrec -> PprPrec
max :: PprPrec -> PprPrec -> PprPrec
$cmax :: PprPrec -> PprPrec -> PprPrec
>= :: PprPrec -> PprPrec -> Bool
$c>= :: PprPrec -> PprPrec -> Bool
> :: PprPrec -> PprPrec -> Bool
$c> :: PprPrec -> PprPrec -> Bool
<= :: PprPrec -> PprPrec -> Bool
$c<= :: PprPrec -> PprPrec -> Bool
< :: PprPrec -> PprPrec -> Bool
$c< :: PprPrec -> PprPrec -> Bool
compare :: PprPrec -> PprPrec -> Ordering
$ccompare :: PprPrec -> PprPrec -> Ordering
Ord, Int -> PprPrec -> ShowS
[PprPrec] -> ShowS
PprPrec -> String
(Int -> PprPrec -> ShowS)
-> (PprPrec -> String) -> ([PprPrec] -> ShowS) -> Show PprPrec
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [PprPrec] -> ShowS
$cshowList :: [PprPrec] -> ShowS
show :: PprPrec -> String
$cshow :: PprPrec -> String
showsPrec :: Int -> PprPrec -> ShowS
$cshowsPrec :: Int -> PprPrec -> ShowS
Show)
-- See Note [Precedence in types]

topPrec, sigPrec, funPrec, opPrec, starPrec, appPrec :: PprPrec
topPrec :: PprPrec
topPrec = Int -> PprPrec
PprPrec Int
0 -- No parens
sigPrec :: PprPrec
sigPrec = Int -> PprPrec
PprPrec Int
1 -- Explicit type signatures
funPrec :: PprPrec
funPrec = Int -> PprPrec
PprPrec Int
2 -- Function args; no parens for constructor apps
                    -- See [Type operator precedence] for why both
                    -- funPrec and opPrec exist.
opPrec :: PprPrec
opPrec  = Int -> PprPrec
PprPrec Int
2 -- Infix operator
starPrec :: PprPrec
starPrec = Int -> PprPrec
PprPrec Int
3 -- Star syntax for the type of types, i.e. the * in (* -> *)
                     -- See Note [Star kind precedence]
appPrec :: PprPrec
appPrec  = Int -> PprPrec
PprPrec Int
4 -- Constructor args; no parens for atomic

maybeParen :: PprPrec -> PprPrec -> SDoc -> SDoc
maybeParen :: PprPrec -> PprPrec -> SDoc -> SDoc
maybeParen PprPrec
ctxt_prec PprPrec
inner_prec SDoc
pretty
  | PprPrec
ctxt_prec PprPrec -> PprPrec -> Bool
forall a. Ord a => a -> a -> Bool
< PprPrec
inner_prec = SDoc
pretty
  | Bool
otherwise              = SDoc -> SDoc
parens SDoc
pretty

{- Note [Precedence in types]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Many pretty-printing functions have type
    ppr_ty :: PprPrec -> Type -> SDoc

The PprPrec gives the binding strength of the context.  For example, in
   T ty1 ty2
we will pretty-print 'ty1' and 'ty2' with the call
  (ppr_ty appPrec ty)
to indicate that the context is that of an argument of a TyConApp.

We use this consistently for Type and HsType.

Note [Type operator precedence]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We don't keep the fixity of type operators in the operator. So the
pretty printer follows the following precedence order:

   TyConPrec         Type constructor application
   TyOpPrec/FunPrec  Operator application and function arrow

We have funPrec and opPrec to represent the precedence of function
arrow and type operators respectively, but currently we implement
funPrec == opPrec, so that we don't distinguish the two. Reason:
it's hard to parse a type like
    a ~ b => c * d -> e - f

By treating opPrec = funPrec we end up with more parens
    (a ~ b) => (c * d) -> (e - f)

But the two are different constructors of PprPrec so we could make
(->) bind more or less tightly if we wanted.

Note [Star kind precedence]
~~~~~~~~~~~~~~~~~~~~~~~~~~~
We parenthesize the (*) kind to avoid two issues:

1. Printing invalid or incorrect code.
   For example, instead of  type F @(*) x = x
         GHC used to print  type F @*   x = x
   However, (@*) is a type operator, not a kind application.

2. Printing kinds that are correct but hard to read.
   Should  Either * Int  be read as  Either (*) Int
                              or as  (*) Either Int  ?
   This depends on whether -XStarIsType is enabled, but it would be
   easier if we didn't have to check for the flag when reading the code.

At the same time, we cannot parenthesize (*) blindly.
Consider this Haskell98 kind:          ((* -> *) -> *) -> *
With parentheses, it is less readable: (((*) -> (*)) -> (*)) -> (*)

The solution is to assign a special precedence to (*), 'starPrec', which is
higher than 'funPrec' but lower than 'appPrec':

   F * * *   becomes  F (*) (*) (*)
   F A * B   becomes  F A (*) B
   Proxy *   becomes  Proxy (*)
   a * -> *  becomes  a (*) -> *
-}

{-
************************************************************************
*                                                                      *
                Tuples
*                                                                      *
************************************************************************
-}

data TupleSort
  = BoxedTuple
  | UnboxedTuple
  | ConstraintTuple
  deriving( TupleSort -> TupleSort -> Bool
(TupleSort -> TupleSort -> Bool)
-> (TupleSort -> TupleSort -> Bool) -> Eq TupleSort
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: TupleSort -> TupleSort -> Bool
$c/= :: TupleSort -> TupleSort -> Bool
== :: TupleSort -> TupleSort -> Bool
$c== :: TupleSort -> TupleSort -> Bool
Eq, Typeable TupleSort
Typeable TupleSort
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> TupleSort -> c TupleSort)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c TupleSort)
-> (TupleSort -> Constr)
-> (TupleSort -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c TupleSort))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c TupleSort))
-> ((forall b. Data b => b -> b) -> TupleSort -> TupleSort)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> TupleSort -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> TupleSort -> r)
-> (forall u. (forall d. Data d => d -> u) -> TupleSort -> [u])
-> (forall u.
    Int -> (forall d. Data d => d -> u) -> TupleSort -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> TupleSort -> m TupleSort)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> TupleSort -> m TupleSort)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> TupleSort -> m TupleSort)
-> Data TupleSort
TupleSort -> DataType
TupleSort -> Constr
(forall b. Data b => b -> b) -> TupleSort -> TupleSort
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) -> TupleSort -> u
forall u. (forall d. Data d => d -> u) -> TupleSort -> [u]
forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> TupleSort -> r
forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> TupleSort -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> TupleSort -> m TupleSort
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> TupleSort -> m TupleSort
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c TupleSort
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> TupleSort -> c TupleSort
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c TupleSort)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c TupleSort)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> TupleSort -> m TupleSort
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> TupleSort -> m TupleSort
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> TupleSort -> m TupleSort
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> TupleSort -> m TupleSort
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> TupleSort -> m TupleSort
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> TupleSort -> m TupleSort
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> TupleSort -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> TupleSort -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> TupleSort -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> TupleSort -> [u]
gmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> TupleSort -> r
$cgmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> TupleSort -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> TupleSort -> r
$cgmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> TupleSort -> r
gmapT :: (forall b. Data b => b -> b) -> TupleSort -> TupleSort
$cgmapT :: (forall b. Data b => b -> b) -> TupleSort -> TupleSort
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c TupleSort)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c TupleSort)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c TupleSort)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c TupleSort)
dataTypeOf :: TupleSort -> DataType
$cdataTypeOf :: TupleSort -> DataType
toConstr :: TupleSort -> Constr
$ctoConstr :: TupleSort -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c TupleSort
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c TupleSort
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> TupleSort -> c TupleSort
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> TupleSort -> c TupleSort
Data )

instance Outputable TupleSort where
  ppr :: TupleSort -> SDoc
ppr TupleSort
ts = String -> SDoc
text (String -> SDoc) -> String -> SDoc
forall a b. (a -> b) -> a -> b
$
    case TupleSort
ts of
      TupleSort
BoxedTuple      -> String
"BoxedTuple"
      TupleSort
UnboxedTuple    -> String
"UnboxedTuple"
      TupleSort
ConstraintTuple -> String
"ConstraintTuple"

tupleSortBoxity :: TupleSort -> Boxity
tupleSortBoxity :: TupleSort -> Boxity
tupleSortBoxity TupleSort
BoxedTuple      = Boxity
Boxed
tupleSortBoxity TupleSort
UnboxedTuple    = Boxity
Unboxed
tupleSortBoxity TupleSort
ConstraintTuple = Boxity
Boxed

boxityTupleSort :: Boxity -> TupleSort
boxityTupleSort :: Boxity -> TupleSort
boxityTupleSort Boxity
Boxed   = TupleSort
BoxedTuple
boxityTupleSort Boxity
Unboxed = TupleSort
UnboxedTuple

tupleParens :: TupleSort -> SDoc -> SDoc
tupleParens :: TupleSort -> SDoc -> SDoc
tupleParens TupleSort
BoxedTuple      SDoc
p = SDoc -> SDoc
parens SDoc
p
tupleParens TupleSort
UnboxedTuple    SDoc
p = String -> SDoc
text String
"(#" SDoc -> SDoc -> SDoc
<+> SDoc
p SDoc -> SDoc -> SDoc
<+> PtrString -> SDoc
ptext (String -> PtrString
sLit String
"#)")
tupleParens TupleSort
ConstraintTuple SDoc
p   -- In debug-style write (% Eq a, Ord b %)
  = SDoc -> SDoc -> SDoc
ifPprDebug (String -> SDoc
text String
"(%" SDoc -> SDoc -> SDoc
<+> SDoc
p SDoc -> SDoc -> SDoc
<+> PtrString -> SDoc
ptext (String -> PtrString
sLit String
"%)"))
               (SDoc -> SDoc
parens SDoc
p)

{-
************************************************************************
*                                                                      *
                Sums
*                                                                      *
************************************************************************
-}

sumParens :: SDoc -> SDoc
sumParens :: SDoc -> SDoc
sumParens SDoc
p = PtrString -> SDoc
ptext (String -> PtrString
sLit String
"(#") SDoc -> SDoc -> SDoc
<+> SDoc
p SDoc -> SDoc -> SDoc
<+> PtrString -> SDoc
ptext (String -> PtrString
sLit String
"#)")

-- | Pretty print an alternative in an unboxed sum e.g. "| a | |".
pprAlternative :: (a -> SDoc) -- ^ The pretty printing function to use
               -> a           -- ^ The things to be pretty printed
               -> ConTag      -- ^ Alternative (one-based)
               -> Arity       -- ^ Arity
               -> SDoc        -- ^ 'SDoc' where the alternative havs been pretty
                              -- printed and finally packed into a paragraph.
pprAlternative :: forall a. (a -> SDoc) -> a -> Int -> Int -> SDoc
pprAlternative a -> SDoc
pp a
x Int
alt Int
arity =
    [SDoc] -> SDoc
fsep (Int -> SDoc -> [SDoc]
forall a. Int -> a -> [a]
replicate (Int
alt Int -> Int -> Int
forall a. Num a => a -> a -> a
- Int
1) SDoc
vbar [SDoc] -> [SDoc] -> [SDoc]
forall a. [a] -> [a] -> [a]
++ [a -> SDoc
pp a
x] [SDoc] -> [SDoc] -> [SDoc]
forall a. [a] -> [a] -> [a]
++ Int -> SDoc -> [SDoc]
forall a. Int -> a -> [a]
replicate (Int
arity Int -> Int -> Int
forall a. Num a => a -> a -> a
- Int
alt) SDoc
vbar)

{-
************************************************************************
*                                                                      *
\subsection[Generic]{Generic flag}
*                                                                      *
************************************************************************

This is the "Embedding-Projection pair" datatype, it contains
two pieces of code (normally either RenamedExpr's or Id's)
If we have a such a pair (EP from to), the idea is that 'from' and 'to'
represents functions of type

        from :: T -> Tring
        to   :: Tring -> T

And we should have

        to (from x) = x

T and Tring are arbitrary, but typically T is the 'main' type while
Tring is the 'representation' type.  (This just helps us remember
whether to use 'from' or 'to'.
-}

-- | Embedding Projection pair
data EP a = EP { forall a. EP a -> a
fromEP :: a,   -- :: T -> Tring
                 forall a. EP a -> a
toEP   :: a }  -- :: Tring -> T

{-
Embedding-projection pairs are used in several places:

First of all, each type constructor has an EP associated with it, the
code in EP converts (datatype T) from T to Tring and back again.

Secondly, when we are filling in Generic methods (in the typechecker,
tcMethodBinds), we are constructing bimaps by induction on the structure
of the type of the method signature.


************************************************************************
*                                                                      *
\subsection{Occurrence information}
*                                                                      *
************************************************************************

This data type is used exclusively by the simplifier, but it appears in a
SubstResult, which is currently defined in GHC.Types.Var.Env, which is pretty
near the base of the module hierarchy.  So it seemed simpler to put the defn of
OccInfo here, safely at the bottom
-}

-- | identifier Occurrence Information
data OccInfo
  = ManyOccs        { OccInfo -> TailCallInfo
occ_tail    :: !TailCallInfo }
                        -- ^ There are many occurrences, or unknown occurrences

  | IAmDead             -- ^ Marks unused variables.  Sometimes useful for
                        -- lambda and case-bound variables.

  | OneOcc          { OccInfo -> InsideLam
occ_in_lam  :: !InsideLam
                    , OccInfo -> Int
occ_n_br    :: {-# UNPACK #-} !BranchCount
                    , OccInfo -> InterestingCxt
occ_int_cxt :: !InterestingCxt
                    , occ_tail    :: !TailCallInfo }
                        -- ^ Occurs exactly once (per branch), not inside a rule

  -- | This identifier breaks a loop of mutually recursive functions. The field
  -- marks whether it is only a loop breaker due to a reference in a rule
  | IAmALoopBreaker { OccInfo -> Bool
occ_rules_only :: !RulesOnly
                    , occ_tail       :: !TailCallInfo }
                        -- Note [LoopBreaker OccInfo]
  deriving (OccInfo -> OccInfo -> Bool
(OccInfo -> OccInfo -> Bool)
-> (OccInfo -> OccInfo -> Bool) -> Eq OccInfo
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: OccInfo -> OccInfo -> Bool
$c/= :: OccInfo -> OccInfo -> Bool
== :: OccInfo -> OccInfo -> Bool
$c== :: OccInfo -> OccInfo -> Bool
Eq)

type RulesOnly = Bool

type BranchCount = Int
  -- For OneOcc, the BranchCount says how many syntactic occurrences there are
  -- At the moment we really only check for 1 or >1, but in principle
  --   we could pay attention to how *many* occurences there are
  --   (notably in postInlineUnconditionally).
  -- But meanwhile, Ints are very efficiently represented.

oneBranch :: BranchCount
oneBranch :: Int
oneBranch = Int
1

{-
Note [LoopBreaker OccInfo]
~~~~~~~~~~~~~~~~~~~~~~~~~~
   IAmALoopBreaker True  <=> A "weak" or rules-only loop breaker
                             Do not preInlineUnconditionally

   IAmALoopBreaker False <=> A "strong" loop breaker
                             Do not inline at all

See OccurAnal Note [Weak loop breakers]
-}

noOccInfo :: OccInfo
noOccInfo :: OccInfo
noOccInfo = ManyOccs :: TailCallInfo -> OccInfo
ManyOccs { occ_tail :: TailCallInfo
occ_tail = TailCallInfo
NoTailCallInfo }

isNoOccInfo :: OccInfo -> Bool
isNoOccInfo :: OccInfo -> Bool
isNoOccInfo ManyOccs { occ_tail :: OccInfo -> TailCallInfo
occ_tail = TailCallInfo
NoTailCallInfo } = Bool
True
isNoOccInfo OccInfo
_ = Bool
False

isManyOccs :: OccInfo -> Bool
isManyOccs :: OccInfo -> Bool
isManyOccs ManyOccs{} = Bool
True
isManyOccs OccInfo
_          = Bool
False

seqOccInfo :: OccInfo -> ()
seqOccInfo :: OccInfo -> ()
seqOccInfo OccInfo
occ = OccInfo
occ OccInfo -> () -> ()
`seq` ()

-----------------
-- | Interesting Context
data InterestingCxt
  = IsInteresting
    -- ^ Function: is applied
    --   Data value: scrutinised by a case with at least one non-DEFAULT branch
  | NotInteresting
  deriving (InterestingCxt -> InterestingCxt -> Bool
(InterestingCxt -> InterestingCxt -> Bool)
-> (InterestingCxt -> InterestingCxt -> Bool) -> Eq InterestingCxt
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: InterestingCxt -> InterestingCxt -> Bool
$c/= :: InterestingCxt -> InterestingCxt -> Bool
== :: InterestingCxt -> InterestingCxt -> Bool
$c== :: InterestingCxt -> InterestingCxt -> Bool
Eq)

-- | If there is any 'interesting' identifier occurrence, then the
-- aggregated occurrence info of that identifier is considered interesting.
instance Semi.Semigroup InterestingCxt where
  InterestingCxt
NotInteresting <> :: InterestingCxt -> InterestingCxt -> InterestingCxt
<> InterestingCxt
x = InterestingCxt
x
  InterestingCxt
IsInteresting  <> InterestingCxt
_ = InterestingCxt
IsInteresting

instance Monoid InterestingCxt where
  mempty :: InterestingCxt
mempty = InterestingCxt
NotInteresting
  mappend :: InterestingCxt -> InterestingCxt -> InterestingCxt
mappend = InterestingCxt -> InterestingCxt -> InterestingCxt
forall a. Semigroup a => a -> a -> a
(Semi.<>)

-----------------
-- | Inside Lambda
data InsideLam
  = IsInsideLam
    -- ^ Occurs inside a non-linear lambda
    -- Substituting a redex for this occurrence is
    -- dangerous because it might duplicate work.
  | NotInsideLam
  deriving (InsideLam -> InsideLam -> Bool
(InsideLam -> InsideLam -> Bool)
-> (InsideLam -> InsideLam -> Bool) -> Eq InsideLam
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: InsideLam -> InsideLam -> Bool
$c/= :: InsideLam -> InsideLam -> Bool
== :: InsideLam -> InsideLam -> Bool
$c== :: InsideLam -> InsideLam -> Bool
Eq)

-- | If any occurrence of an identifier is inside a lambda, then the
-- occurrence info of that identifier marks it as occurring inside a lambda
instance Semi.Semigroup InsideLam where
  InsideLam
NotInsideLam <> :: InsideLam -> InsideLam -> InsideLam
<> InsideLam
x = InsideLam
x
  InsideLam
IsInsideLam  <> InsideLam
_ = InsideLam
IsInsideLam

instance Monoid InsideLam where
  mempty :: InsideLam
mempty = InsideLam
NotInsideLam
  mappend :: InsideLam -> InsideLam -> InsideLam
mappend = InsideLam -> InsideLam -> InsideLam
forall a. Semigroup a => a -> a -> a
(Semi.<>)

-----------------
data TailCallInfo = AlwaysTailCalled JoinArity -- See Note [TailCallInfo]
                  | NoTailCallInfo
  deriving (TailCallInfo -> TailCallInfo -> Bool
(TailCallInfo -> TailCallInfo -> Bool)
-> (TailCallInfo -> TailCallInfo -> Bool) -> Eq TailCallInfo
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: TailCallInfo -> TailCallInfo -> Bool
$c/= :: TailCallInfo -> TailCallInfo -> Bool
== :: TailCallInfo -> TailCallInfo -> Bool
$c== :: TailCallInfo -> TailCallInfo -> Bool
Eq)

tailCallInfo :: OccInfo -> TailCallInfo
tailCallInfo :: OccInfo -> TailCallInfo
tailCallInfo OccInfo
IAmDead   = TailCallInfo
NoTailCallInfo
tailCallInfo OccInfo
other     = OccInfo -> TailCallInfo
occ_tail OccInfo
other

zapOccTailCallInfo :: OccInfo -> OccInfo
zapOccTailCallInfo :: OccInfo -> OccInfo
zapOccTailCallInfo OccInfo
IAmDead   = OccInfo
IAmDead
zapOccTailCallInfo OccInfo
occ       = OccInfo
occ { occ_tail :: TailCallInfo
occ_tail = TailCallInfo
NoTailCallInfo }

isAlwaysTailCalled :: OccInfo -> Bool
isAlwaysTailCalled :: OccInfo -> Bool
isAlwaysTailCalled OccInfo
occ
  = case OccInfo -> TailCallInfo
tailCallInfo OccInfo
occ of AlwaysTailCalled{} -> Bool
True
                             TailCallInfo
NoTailCallInfo     -> Bool
False

instance Outputable TailCallInfo where
  ppr :: TailCallInfo -> SDoc
ppr (AlwaysTailCalled Int
ar) = [SDoc] -> SDoc
sep [ String -> SDoc
text String
"Tail", Int -> SDoc
int Int
ar ]
  ppr TailCallInfo
_                     = SDoc
empty

-----------------
strongLoopBreaker, weakLoopBreaker :: OccInfo
strongLoopBreaker :: OccInfo
strongLoopBreaker = Bool -> TailCallInfo -> OccInfo
IAmALoopBreaker Bool
False TailCallInfo
NoTailCallInfo
weakLoopBreaker :: OccInfo
weakLoopBreaker   = Bool -> TailCallInfo -> OccInfo
IAmALoopBreaker Bool
True  TailCallInfo
NoTailCallInfo

isWeakLoopBreaker :: OccInfo -> Bool
isWeakLoopBreaker :: OccInfo -> Bool
isWeakLoopBreaker (IAmALoopBreaker{}) = Bool
True
isWeakLoopBreaker OccInfo
_                   = Bool
False

isStrongLoopBreaker :: OccInfo -> Bool
isStrongLoopBreaker :: OccInfo -> Bool
isStrongLoopBreaker (IAmALoopBreaker { occ_rules_only :: OccInfo -> Bool
occ_rules_only = Bool
False }) = Bool
True
  -- Loop-breaker that breaks a non-rule cycle
isStrongLoopBreaker OccInfo
_                                            = Bool
False

isDeadOcc :: OccInfo -> Bool
isDeadOcc :: OccInfo -> Bool
isDeadOcc OccInfo
IAmDead = Bool
True
isDeadOcc OccInfo
_       = Bool
False

isOneOcc :: OccInfo -> Bool
isOneOcc :: OccInfo -> Bool
isOneOcc (OneOcc {}) = Bool
True
isOneOcc OccInfo
_           = Bool
False

zapFragileOcc :: OccInfo -> OccInfo
-- Keep only the most robust data: deadness, loop-breaker-hood
zapFragileOcc :: OccInfo -> OccInfo
zapFragileOcc (OneOcc {}) = OccInfo
noOccInfo
zapFragileOcc OccInfo
occ         = OccInfo -> OccInfo
zapOccTailCallInfo OccInfo
occ

instance Outputable OccInfo where
  -- only used for debugging; never parsed.  KSW 1999-07
  ppr :: OccInfo -> SDoc
ppr (ManyOccs TailCallInfo
tails)     = TailCallInfo -> SDoc
pprShortTailCallInfo TailCallInfo
tails
  ppr OccInfo
IAmDead              = String -> SDoc
text String
"Dead"
  ppr (IAmALoopBreaker Bool
rule_only TailCallInfo
tails)
        = String -> SDoc
text String
"LoopBreaker" SDoc -> SDoc -> SDoc
<> SDoc
pp_ro SDoc -> SDoc -> SDoc
<> TailCallInfo -> SDoc
pprShortTailCallInfo TailCallInfo
tails
        where
          pp_ro :: SDoc
pp_ro | Bool
rule_only = Char -> SDoc
char Char
'!'
                | Bool
otherwise = SDoc
empty
  ppr (OneOcc InsideLam
inside_lam Int
one_branch InterestingCxt
int_cxt TailCallInfo
tail_info)
        = String -> SDoc
text String
"Once" SDoc -> SDoc -> SDoc
<> InsideLam -> SDoc
pp_lam InsideLam
inside_lam SDoc -> SDoc -> SDoc
<> Int -> SDoc
forall a. Outputable a => a -> SDoc
ppr Int
one_branch SDoc -> SDoc -> SDoc
<> InterestingCxt -> SDoc
pp_args InterestingCxt
int_cxt SDoc -> SDoc -> SDoc
<> SDoc
pp_tail
        where
          pp_lam :: InsideLam -> SDoc
pp_lam InsideLam
IsInsideLam     = Char -> SDoc
char Char
'L'
          pp_lam InsideLam
NotInsideLam    = SDoc
empty
          pp_args :: InterestingCxt -> SDoc
pp_args InterestingCxt
IsInteresting  = Char -> SDoc
char Char
'!'
          pp_args InterestingCxt
NotInteresting = SDoc
empty
          pp_tail :: SDoc
pp_tail                = TailCallInfo -> SDoc
pprShortTailCallInfo TailCallInfo
tail_info

pprShortTailCallInfo :: TailCallInfo -> SDoc
pprShortTailCallInfo :: TailCallInfo -> SDoc
pprShortTailCallInfo (AlwaysTailCalled Int
ar) = Char -> SDoc
char Char
'T' SDoc -> SDoc -> SDoc
<> SDoc -> SDoc
brackets (Int -> SDoc
int Int
ar)
pprShortTailCallInfo TailCallInfo
NoTailCallInfo        = SDoc
empty

{-
Note [TailCallInfo]
~~~~~~~~~~~~~~~~~~~
The occurrence analyser determines what can be made into a join point, but it
doesn't change the binder into a JoinId because then it would be inconsistent
with the occurrences. Thus it's left to the simplifier (or to simpleOptExpr) to
change the IdDetails.

The AlwaysTailCalled marker actually means slightly more than simply that the
function is always tail-called. See Note [Invariants on join points].

This info is quite fragile and should not be relied upon unless the occurrence
analyser has *just* run. Use 'Id.isJoinId_maybe' for the permanent state of
the join-point-hood of a binder; a join id itself will not be marked
AlwaysTailCalled.

Note that there is a 'TailCallInfo' on a 'ManyOccs' value. One might expect that
being tail-called would mean that the variable could only appear once per branch
(thus getting a `OneOcc { }` occurrence info), but a join
point can also be invoked from other join points, not just from case branches:

  let j1 x = ...
      j2 y = ... j1 z {- tail call -} ...
  in case w of
       A -> j1 v
       B -> j2 u
       C -> j2 q

Here both 'j1' and 'j2' will get marked AlwaysTailCalled, but j1 will get
ManyOccs and j2 will get `OneOcc { occ_n_br = 2 }`.

************************************************************************
*                                                                      *
                Default method specification
*                                                                      *
************************************************************************

The DefMethSpec enumeration just indicates what sort of default method
is used for a class. It is generated from source code, and present in
interface files; it is converted to Class.DefMethInfo before begin put in a
Class object.
-}

-- | Default Method Specification
data DefMethSpec ty
  = VanillaDM     -- Default method given with polymorphic code
  | GenericDM ty  -- Default method given with code of this type

instance Outputable (DefMethSpec ty) where
  ppr :: DefMethSpec ty -> SDoc
ppr DefMethSpec ty
VanillaDM      = String -> SDoc
text String
"{- Has default method -}"
  ppr (GenericDM {}) = String -> SDoc
text String
"{- Has generic default method -}"

{-
************************************************************************
*                                                                      *
\subsection{Success flag}
*                                                                      *
************************************************************************
-}

data SuccessFlag = Succeeded | Failed

instance Outputable SuccessFlag where
    ppr :: SuccessFlag -> SDoc
ppr SuccessFlag
Succeeded = String -> SDoc
text String
"Succeeded"
    ppr SuccessFlag
Failed    = String -> SDoc
text String
"Failed"

successIf :: Bool -> SuccessFlag
successIf :: Bool -> SuccessFlag
successIf Bool
True  = SuccessFlag
Succeeded
successIf Bool
False = SuccessFlag
Failed

succeeded, failed :: SuccessFlag -> Bool
succeeded :: SuccessFlag -> Bool
succeeded SuccessFlag
Succeeded = Bool
True
succeeded SuccessFlag
Failed    = Bool
False

failed :: SuccessFlag -> Bool
failed SuccessFlag
Succeeded = Bool
False
failed SuccessFlag
Failed    = Bool
True

{-
************************************************************************
*                                                                      *
\subsection{Source Text}
*                                                                      *
************************************************************************
Keeping Source Text for source to source conversions

Note [Pragma source text]
~~~~~~~~~~~~~~~~~~~~~~~~~
The lexer does a case-insensitive match for pragmas, as well as
accepting both UK and US spelling variants.

So

  {-# SPECIALISE #-}
  {-# SPECIALIZE #-}
  {-# Specialize #-}

will all generate ITspec_prag token for the start of the pragma.

In order to be able to do source to source conversions, the original
source text for the token needs to be preserved, hence the
`SourceText` field.

So the lexer will then generate

  ITspec_prag "{ -# SPECIALISE"
  ITspec_prag "{ -# SPECIALIZE"
  ITspec_prag "{ -# Specialize"

for the cases above.
 [without the space between '{' and '-', otherwise this comment won't parse]


Note [Literal source text]
~~~~~~~~~~~~~~~~~~~~~~~~~~
The lexer/parser converts literals from their original source text
versions to an appropriate internal representation. This is a problem
for tools doing source to source conversions, so the original source
text is stored in literals where this can occur.

Motivating examples for HsLit

  HsChar          '\n'       == '\x20`
  HsCharPrim      '\x41`#    == `A`
  HsString        "\x20\x41" == " A"
  HsStringPrim    "\x20"#    == " "#
  HsInt           001        == 1
  HsIntPrim       002#       == 2#
  HsWordPrim      003##      == 3##
  HsInt64Prim     004##      == 4##
  HsWord64Prim    005##      == 5##
  HsInteger       006        == 6

For OverLitVal

  HsIntegral      003      == 0x003
  HsIsString      "\x41nd" == "And"
-}

 -- Note [Literal source text],[Pragma source text]
data SourceText = SourceText String
                | NoSourceText -- ^ For when code is generated, e.g. TH,
                               -- deriving. The pretty printer will then make
                               -- its own representation of the item.
                deriving (Typeable SourceText
Typeable SourceText
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> SourceText -> c SourceText)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c SourceText)
-> (SourceText -> Constr)
-> (SourceText -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c SourceText))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e))
    -> Maybe (c SourceText))
-> ((forall b. Data b => b -> b) -> SourceText -> SourceText)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> SourceText -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> SourceText -> r)
-> (forall u. (forall d. Data d => d -> u) -> SourceText -> [u])
-> (forall u.
    Int -> (forall d. Data d => d -> u) -> SourceText -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> SourceText -> m SourceText)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> SourceText -> m SourceText)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> SourceText -> m SourceText)
-> Data SourceText
SourceText -> DataType
SourceText -> Constr
(forall b. Data b => b -> b) -> SourceText -> SourceText
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) -> SourceText -> u
forall u. (forall d. Data d => d -> u) -> SourceText -> [u]
forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> SourceText -> r
forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> SourceText -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> SourceText -> m SourceText
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> SourceText -> m SourceText
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c SourceText
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> SourceText -> c SourceText
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c SourceText)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c SourceText)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> SourceText -> m SourceText
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> SourceText -> m SourceText
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> SourceText -> m SourceText
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> SourceText -> m SourceText
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> SourceText -> m SourceText
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> SourceText -> m SourceText
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> SourceText -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> SourceText -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> SourceText -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> SourceText -> [u]
gmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> SourceText -> r
$cgmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> SourceText -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> SourceText -> r
$cgmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> SourceText -> r
gmapT :: (forall b. Data b => b -> b) -> SourceText -> SourceText
$cgmapT :: (forall b. Data b => b -> b) -> SourceText -> SourceText
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c SourceText)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c SourceText)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c SourceText)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c SourceText)
dataTypeOf :: SourceText -> DataType
$cdataTypeOf :: SourceText -> DataType
toConstr :: SourceText -> Constr
$ctoConstr :: SourceText -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c SourceText
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c SourceText
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> SourceText -> c SourceText
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> SourceText -> c SourceText
Data, Int -> SourceText -> ShowS
[SourceText] -> ShowS
SourceText -> String
(Int -> SourceText -> ShowS)
-> (SourceText -> String)
-> ([SourceText] -> ShowS)
-> Show SourceText
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [SourceText] -> ShowS
$cshowList :: [SourceText] -> ShowS
show :: SourceText -> String
$cshow :: SourceText -> String
showsPrec :: Int -> SourceText -> ShowS
$cshowsPrec :: Int -> SourceText -> ShowS
Show, SourceText -> SourceText -> Bool
(SourceText -> SourceText -> Bool)
-> (SourceText -> SourceText -> Bool) -> Eq SourceText
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: SourceText -> SourceText -> Bool
$c/= :: SourceText -> SourceText -> Bool
== :: SourceText -> SourceText -> Bool
$c== :: SourceText -> SourceText -> Bool
Eq )

instance Outputable SourceText where
  ppr :: SourceText -> SDoc
ppr (SourceText String
s) = String -> SDoc
text String
"SourceText" SDoc -> SDoc -> SDoc
<+> String -> SDoc
text String
s
  ppr SourceText
NoSourceText   = String -> SDoc
text String
"NoSourceText"

-- | Special combinator for showing string literals.
pprWithSourceText :: SourceText -> SDoc -> SDoc
pprWithSourceText :: SourceText -> SDoc -> SDoc
pprWithSourceText SourceText
NoSourceText     SDoc
d = SDoc
d
pprWithSourceText (SourceText String
src) SDoc
_ = String -> SDoc
text String
src

{-
************************************************************************
*                                                                      *
\subsection{Activation}
*                                                                      *
************************************************************************

When a rule or inlining is active

Note [Compiler phases]
~~~~~~~~~~~~~~~~~~~~~~
The CompilerPhase says which phase the simplifier is running in:

* InitialPhase: before all user-visible phases

* Phase 2,1,0: user-visible phases; the phase number
  controls rule ordering an inlining.

* FinalPhase: used for all subsequent simplifier
  runs. By delaying inlining of wrappers to FinalPhase we can
  ensure that RULE have a good chance to fire. See
  Note [Wrapper activation] in GHC.Core.Opt.WorkWrap

  NB: FinalPhase is run repeatedly, not just once.

  NB: users don't have access to InitialPhase or FinalPhase.
  They write {-# INLINE[n] f #-}, meaning (Phase n)

The phase sequencing is done by GHC.Opt.Simplify.Driver
-}

-- | Phase Number
type PhaseNum = Int  -- Compilation phase
                     -- Phases decrease towards zero
                     -- Zero is the last phase

data CompilerPhase
  = InitialPhase    -- The first phase -- number = infinity!
  | Phase PhaseNum  -- User-specificable phases
  | FinalPhase      -- The last phase  -- number = -infinity!
  deriving CompilerPhase -> CompilerPhase -> Bool
(CompilerPhase -> CompilerPhase -> Bool)
-> (CompilerPhase -> CompilerPhase -> Bool) -> Eq CompilerPhase
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: CompilerPhase -> CompilerPhase -> Bool
$c/= :: CompilerPhase -> CompilerPhase -> Bool
== :: CompilerPhase -> CompilerPhase -> Bool
$c== :: CompilerPhase -> CompilerPhase -> Bool
Eq

instance Outputable CompilerPhase where
   ppr :: CompilerPhase -> SDoc
ppr (Phase Int
n)    = Int -> SDoc
int Int
n
   ppr CompilerPhase
InitialPhase = String -> SDoc
text String
"InitialPhase"
   ppr CompilerPhase
FinalPhase   = String -> SDoc
text String
"FinalPhase"

-- See note [Pragma source text]
data Activation
  = AlwaysActive
  | ActiveBefore SourceText PhaseNum  -- Active only *strictly before* this phase
  | ActiveAfter  SourceText PhaseNum  -- Active in this phase and later
  | FinalActive                       -- Active in final phase only
  | NeverActive
  deriving( Activation -> Activation -> Bool
(Activation -> Activation -> Bool)
-> (Activation -> Activation -> Bool) -> Eq Activation
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Activation -> Activation -> Bool
$c/= :: Activation -> Activation -> Bool
== :: Activation -> Activation -> Bool
$c== :: Activation -> Activation -> Bool
Eq, Typeable Activation
Typeable Activation
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> Activation -> c Activation)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c Activation)
-> (Activation -> Constr)
-> (Activation -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c Activation))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e))
    -> Maybe (c Activation))
-> ((forall b. Data b => b -> b) -> Activation -> Activation)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> Activation -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> Activation -> r)
-> (forall u. (forall d. Data d => d -> u) -> Activation -> [u])
-> (forall u.
    Int -> (forall d. Data d => d -> u) -> Activation -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> Activation -> m Activation)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> Activation -> m Activation)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> Activation -> m Activation)
-> Data Activation
Activation -> DataType
Activation -> Constr
(forall b. Data b => b -> b) -> Activation -> Activation
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) -> Activation -> u
forall u. (forall d. Data d => d -> u) -> Activation -> [u]
forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> Activation -> r
forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> Activation -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Activation -> m Activation
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Activation -> m Activation
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Activation
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Activation -> c Activation
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Activation)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Activation)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Activation -> m Activation
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Activation -> m Activation
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Activation -> m Activation
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> Activation -> m Activation
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Activation -> m Activation
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> Activation -> m Activation
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Activation -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> Activation -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> Activation -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> Activation -> [u]
gmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> Activation -> r
$cgmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> Activation -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> Activation -> r
$cgmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> Activation -> r
gmapT :: (forall b. Data b => b -> b) -> Activation -> Activation
$cgmapT :: (forall b. Data b => b -> b) -> Activation -> Activation
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Activation)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Activation)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Activation)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c Activation)
dataTypeOf :: Activation -> DataType
$cdataTypeOf :: Activation -> DataType
toConstr :: Activation -> Constr
$ctoConstr :: Activation -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Activation
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c Activation
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Activation -> c Activation
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> Activation -> c Activation
Data )
    -- Eq used in comparing rules in GHC.Hs.Decls

activateAfterInitial :: Activation
-- Active in the first phase after the initial phase
-- Currently we have just phases [2,1,0,FinalPhase,FinalPhase,...]
-- Where FinalPhase means GHC's internal simplification steps
-- after all rules have run
activateAfterInitial :: Activation
activateAfterInitial = SourceText -> Int -> Activation
ActiveAfter SourceText
NoSourceText Int
2

activateDuringFinal :: Activation
-- Active in the final simplification phase (which is repeated)
activateDuringFinal :: Activation
activateDuringFinal = Activation
FinalActive

isActive :: CompilerPhase -> Activation -> Bool
isActive :: CompilerPhase -> Activation -> Bool
isActive CompilerPhase
InitialPhase Activation
act = Activation -> Bool
activeInInitialPhase Activation
act
isActive (Phase Int
p)    Activation
act = Int -> Activation -> Bool
activeInPhase Int
p Activation
act
isActive CompilerPhase
FinalPhase   Activation
act = Activation -> Bool
activeInFinalPhase Activation
act

activeInInitialPhase :: Activation -> Bool
activeInInitialPhase :: Activation -> Bool
activeInInitialPhase Activation
AlwaysActive      = Bool
True
activeInInitialPhase (ActiveBefore {}) = Bool
True
activeInInitialPhase Activation
_                 = Bool
False

activeInPhase :: PhaseNum -> Activation -> Bool
activeInPhase :: Int -> Activation -> Bool
activeInPhase Int
_ Activation
AlwaysActive       = Bool
True
activeInPhase Int
_ Activation
NeverActive        = Bool
False
activeInPhase Int
_ Activation
FinalActive        = Bool
False
activeInPhase Int
p (ActiveAfter  SourceText
_ Int
n) = Int
p Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
<= Int
n
activeInPhase Int
p (ActiveBefore SourceText
_ Int
n) = Int
p Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
>  Int
n

activeInFinalPhase :: Activation -> Bool
activeInFinalPhase :: Activation -> Bool
activeInFinalPhase Activation
AlwaysActive     = Bool
True
activeInFinalPhase Activation
FinalActive      = Bool
True
activeInFinalPhase (ActiveAfter {}) = Bool
True
activeInFinalPhase Activation
_                = Bool
False

isNeverActive, isAlwaysActive :: Activation -> Bool
isNeverActive :: Activation -> Bool
isNeverActive Activation
NeverActive = Bool
True
isNeverActive Activation
_           = Bool
False

isAlwaysActive :: Activation -> Bool
isAlwaysActive Activation
AlwaysActive = Bool
True
isAlwaysActive Activation
_            = Bool
False

competesWith :: Activation -> Activation -> Bool
-- See Note [Activation competition]
competesWith :: Activation -> Activation -> Bool
competesWith Activation
AlwaysActive      Activation
_                = Bool
True

competesWith Activation
NeverActive       Activation
_                = Bool
False
competesWith Activation
_                 Activation
NeverActive      = Bool
False

competesWith Activation
FinalActive       Activation
FinalActive      = Bool
True
competesWith Activation
FinalActive       Activation
_                = Bool
False

competesWith (ActiveBefore {})  Activation
AlwaysActive      = Bool
True
competesWith (ActiveBefore {})  Activation
FinalActive       = Bool
False
competesWith (ActiveBefore {})  (ActiveBefore {}) = Bool
True
competesWith (ActiveBefore SourceText
_ Int
a) (ActiveAfter SourceText
_ Int
b) = Int
a Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
< Int
b

competesWith (ActiveAfter {})  Activation
AlwaysActive      = Bool
False
competesWith (ActiveAfter {})  Activation
FinalActive       = Bool
True
competesWith (ActiveAfter {})  (ActiveBefore {}) = Bool
False
competesWith (ActiveAfter SourceText
_ Int
a) (ActiveAfter SourceText
_ Int
b) = Int
a Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
>= Int
b

{- Note [Competing activations]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Sometimes a RULE and an inlining may compete, or two RULES.
See Note [Rules and inlining/other rules] in GHC.HsToCore.

We say that act1 "competes with" act2 iff
   act1 is active in the phase when act2 *becomes* active
NB: remember that phases count *down*: 2, 1, 0!

It's too conservative to ensure that the two are never simultaneously
active.  For example, a rule might be always active, and an inlining
might switch on in phase 2.  We could switch off the rule, but it does
no harm.
-}


{- *********************************************************************
*                                                                      *
                 InlinePragma, InlineSpec, RuleMatchInfo
*                                                                      *
********************************************************************* -}


data InlinePragma            -- Note [InlinePragma]
  = InlinePragma
      { InlinePragma -> SourceText
inl_src    :: SourceText -- Note [Pragma source text]
      , InlinePragma -> InlineSpec
inl_inline :: InlineSpec -- See Note [inl_inline and inl_act]

      , InlinePragma -> Maybe Int
inl_sat    :: Maybe Arity    -- Just n <=> Inline only when applied to n
                                     --            explicit (non-type, non-dictionary) args
                                     --   That is, inl_sat describes the number of *source-code*
                                     --   arguments the thing must be applied to.  We add on the
                                     --   number of implicit, dictionary arguments when making
                                     --   the Unfolding, and don't look at inl_sat further

      , InlinePragma -> Activation
inl_act    :: Activation     -- Says during which phases inlining is allowed
                                     -- See Note [inl_inline and inl_act]

      , InlinePragma -> RuleMatchInfo
inl_rule   :: RuleMatchInfo  -- Should the function be treated like a constructor?
    } deriving( InlinePragma -> InlinePragma -> Bool
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-- | Rule Match Information
data RuleMatchInfo = ConLike                    -- See Note [CONLIKE pragma]
                   | FunLike
                   deriving( RuleMatchInfo -> RuleMatchInfo -> Bool
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        -- Show needed for GHC.Parser.Lexer

-- | Inline Specification
data InlineSpec   -- What the user's INLINE pragma looked like
  = Inline       -- User wrote INLINE
  | Inlinable    -- User wrote INLINABLE
  | NoInline     -- User wrote NOINLINE
  | NoUserInline -- User did not write any of INLINE/INLINABLE/NOINLINE
                 -- e.g. in `defaultInlinePragma` or when created by CSE
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forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> InlineSpec -> m InlineSpec
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c InlineSpec
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> InlineSpec -> c InlineSpec
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c InlineSpec)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c InlineSpec)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> InlineSpec -> m InlineSpec
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> InlineSpec -> m InlineSpec
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> InlineSpec -> m InlineSpec
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> InlineSpec -> m InlineSpec
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> InlineSpec -> m InlineSpec
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> InlineSpec -> m InlineSpec
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> InlineSpec -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> InlineSpec -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> InlineSpec -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> InlineSpec -> [u]
gmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> InlineSpec -> r
$cgmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> InlineSpec -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> InlineSpec -> r
$cgmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> InlineSpec -> r
gmapT :: (forall b. Data b => b -> b) -> InlineSpec -> InlineSpec
$cgmapT :: (forall b. Data b => b -> b) -> InlineSpec -> InlineSpec
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c InlineSpec)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c InlineSpec)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c InlineSpec)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c InlineSpec)
dataTypeOf :: InlineSpec -> DataType
$cdataTypeOf :: InlineSpec -> DataType
toConstr :: InlineSpec -> Constr
$ctoConstr :: InlineSpec -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c InlineSpec
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c InlineSpec
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> InlineSpec -> c InlineSpec
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> InlineSpec -> c InlineSpec
Data, Int -> InlineSpec -> ShowS
[InlineSpec] -> ShowS
InlineSpec -> String
(Int -> InlineSpec -> ShowS)
-> (InlineSpec -> String)
-> ([InlineSpec] -> ShowS)
-> Show InlineSpec
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [InlineSpec] -> ShowS
$cshowList :: [InlineSpec] -> ShowS
show :: InlineSpec -> String
$cshow :: InlineSpec -> String
showsPrec :: Int -> InlineSpec -> ShowS
$cshowsPrec :: Int -> InlineSpec -> ShowS
Show )
        -- Show needed for GHC.Parser.Lexer

{- Note [InlinePragma]
~~~~~~~~~~~~~~~~~~~~~~
This data type mirrors what you can write in an INLINE or NOINLINE pragma in
the source program.

If you write nothing at all, you get defaultInlinePragma:
   inl_inline = NoUserInline
   inl_act    = AlwaysActive
   inl_rule   = FunLike

It's not possible to get that combination by *writing* something, so
if an Id has defaultInlinePragma it means the user didn't specify anything.

If inl_inline = Inline or Inlineable, then the Id should have an InlineRule unfolding.

If you want to know where InlinePragmas take effect: Look in GHC.HsToCore.Binds.makeCorePair

Note [inl_inline and inl_act]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* inl_inline says what the user wrote: did she say INLINE, NOINLINE,
  INLINABLE, or nothing at all

* inl_act says in what phases the unfolding is active or inactive
  E.g  If you write INLINE[1]    then inl_act will be set to ActiveAfter 1
       If you write NOINLINE[1]  then inl_act will be set to ActiveBefore 1
       If you write NOINLINE[~1] then inl_act will be set to ActiveAfter 1
  So note that inl_act does not say what pragma you wrote: it just
  expresses its consequences

* inl_act just says when the unfolding is active; it doesn't say what
  to inline.  If you say INLINE f, then f's inl_act will be AlwaysActive,
  but in addition f will get a "stable unfolding" with UnfoldingGuidance
  that tells the inliner to be pretty eager about it.

Note [CONLIKE pragma]
~~~~~~~~~~~~~~~~~~~~~
The ConLike constructor of a RuleMatchInfo is aimed at the following.
Consider first
    {-# RULE "r/cons" forall a as. r (a:as) = f (a+1) #-}
    g b bs = let x = b:bs in ..x...x...(r x)...
Now, the rule applies to the (r x) term, because GHC "looks through"
the definition of 'x' to see that it is (b:bs).

Now consider
    {-# RULE "r/f" forall v. r (f v) = f (v+1) #-}
    g v = let x = f v in ..x...x...(r x)...
Normally the (r x) would *not* match the rule, because GHC would be
scared about duplicating the redex (f v), so it does not "look
through" the bindings.

However the CONLIKE modifier says to treat 'f' like a constructor in
this situation, and "look through" the unfolding for x.  So (r x)
fires, yielding (f (v+1)).

This is all controlled with a user-visible pragma:
     {-# NOINLINE CONLIKE [1] f #-}

The main effects of CONLIKE are:

    - The occurrence analyser (OccAnal) and simplifier (Simplify) treat
      CONLIKE thing like constructors, by ANF-ing them

    - New function GHC.Core.Utils.exprIsExpandable is like exprIsCheap, but
      additionally spots applications of CONLIKE functions

    - A CoreUnfolding has a field that caches exprIsExpandable

    - The rule matcher consults this field.  See
      Note [Expanding variables] in GHC.Core.Rules.
-}

isConLike :: RuleMatchInfo -> Bool
isConLike :: RuleMatchInfo -> Bool
isConLike RuleMatchInfo
ConLike = Bool
True
isConLike RuleMatchInfo
_       = Bool
False

isFunLike :: RuleMatchInfo -> Bool
isFunLike :: RuleMatchInfo -> Bool
isFunLike RuleMatchInfo
FunLike = Bool
True
isFunLike RuleMatchInfo
_       = Bool
False

noUserInlineSpec :: InlineSpec -> Bool
noUserInlineSpec :: InlineSpec -> Bool
noUserInlineSpec InlineSpec
NoUserInline = Bool
True
noUserInlineSpec InlineSpec
_            = Bool
False

defaultInlinePragma, alwaysInlinePragma, neverInlinePragma, dfunInlinePragma
  :: InlinePragma
defaultInlinePragma :: InlinePragma
defaultInlinePragma = InlinePragma :: SourceText
-> InlineSpec
-> Maybe Int
-> Activation
-> RuleMatchInfo
-> InlinePragma
InlinePragma { inl_src :: SourceText
inl_src = String -> SourceText
SourceText String
"{-# INLINE"
                                   , inl_act :: Activation
inl_act = Activation
AlwaysActive
                                   , inl_rule :: RuleMatchInfo
inl_rule = RuleMatchInfo
FunLike
                                   , inl_inline :: InlineSpec
inl_inline = InlineSpec
NoUserInline
                                   , inl_sat :: Maybe Int
inl_sat = Maybe Int
forall a. Maybe a
Nothing }

alwaysInlinePragma :: InlinePragma
alwaysInlinePragma = InlinePragma
defaultInlinePragma { inl_inline :: InlineSpec
inl_inline = InlineSpec
Inline }
neverInlinePragma :: InlinePragma
neverInlinePragma  = InlinePragma
defaultInlinePragma { inl_act :: Activation
inl_act    = Activation
NeverActive }

inlinePragmaSpec :: InlinePragma -> InlineSpec
inlinePragmaSpec :: InlinePragma -> InlineSpec
inlinePragmaSpec = InlinePragma -> InlineSpec
inl_inline

-- A DFun has an always-active inline activation so that
-- exprIsConApp_maybe can "see" its unfolding
-- (However, its actual Unfolding is a DFunUnfolding, which is
--  never inlined other than via exprIsConApp_maybe.)
dfunInlinePragma :: InlinePragma
dfunInlinePragma   = InlinePragma
defaultInlinePragma { inl_act :: Activation
inl_act  = Activation
AlwaysActive
                                         , inl_rule :: RuleMatchInfo
inl_rule = RuleMatchInfo
ConLike }

isDefaultInlinePragma :: InlinePragma -> Bool
isDefaultInlinePragma :: InlinePragma -> Bool
isDefaultInlinePragma (InlinePragma { inl_act :: InlinePragma -> Activation
inl_act = Activation
activation
                                    , inl_rule :: InlinePragma -> RuleMatchInfo
inl_rule = RuleMatchInfo
match_info
                                    , inl_inline :: InlinePragma -> InlineSpec
inl_inline = InlineSpec
inline })
  = InlineSpec -> Bool
noUserInlineSpec InlineSpec
inline Bool -> Bool -> Bool
&& Activation -> Bool
isAlwaysActive Activation
activation Bool -> Bool -> Bool
&& RuleMatchInfo -> Bool
isFunLike RuleMatchInfo
match_info

isInlinePragma :: InlinePragma -> Bool
isInlinePragma :: InlinePragma -> Bool
isInlinePragma InlinePragma
prag = case InlinePragma -> InlineSpec
inl_inline InlinePragma
prag of
                        InlineSpec
Inline -> Bool
True
                        InlineSpec
_      -> Bool
False

isInlinablePragma :: InlinePragma -> Bool
isInlinablePragma :: InlinePragma -> Bool
isInlinablePragma InlinePragma
prag = case InlinePragma -> InlineSpec
inl_inline InlinePragma
prag of
                           InlineSpec
Inlinable -> Bool
True
                           InlineSpec
_         -> Bool
False

isAnyInlinePragma :: InlinePragma -> Bool
-- INLINE or INLINABLE
isAnyInlinePragma :: InlinePragma -> Bool
isAnyInlinePragma InlinePragma
prag = case InlinePragma -> InlineSpec
inl_inline InlinePragma
prag of
                        InlineSpec
Inline    -> Bool
True
                        InlineSpec
Inlinable -> Bool
True
                        InlineSpec
_         -> Bool
False

inlinePragmaSat :: InlinePragma -> Maybe Arity
inlinePragmaSat :: InlinePragma -> Maybe Int
inlinePragmaSat = InlinePragma -> Maybe Int
inl_sat

inlinePragmaActivation :: InlinePragma -> Activation
inlinePragmaActivation :: InlinePragma -> Activation
inlinePragmaActivation (InlinePragma { inl_act :: InlinePragma -> Activation
inl_act = Activation
activation }) = Activation
activation

inlinePragmaRuleMatchInfo :: InlinePragma -> RuleMatchInfo
inlinePragmaRuleMatchInfo :: InlinePragma -> RuleMatchInfo
inlinePragmaRuleMatchInfo (InlinePragma { inl_rule :: InlinePragma -> RuleMatchInfo
inl_rule = RuleMatchInfo
info }) = RuleMatchInfo
info

setInlinePragmaActivation :: InlinePragma -> Activation -> InlinePragma
setInlinePragmaActivation :: InlinePragma -> Activation -> InlinePragma
setInlinePragmaActivation InlinePragma
prag Activation
activation = InlinePragma
prag { inl_act :: Activation
inl_act = Activation
activation }

setInlinePragmaRuleMatchInfo :: InlinePragma -> RuleMatchInfo -> InlinePragma
setInlinePragmaRuleMatchInfo :: InlinePragma -> RuleMatchInfo -> InlinePragma
setInlinePragmaRuleMatchInfo InlinePragma
prag RuleMatchInfo
info = InlinePragma
prag { inl_rule :: RuleMatchInfo
inl_rule = RuleMatchInfo
info }

instance Outputable Activation where
   ppr :: Activation -> SDoc
ppr Activation
AlwaysActive       = SDoc
empty
   ppr Activation
NeverActive        = SDoc -> SDoc
brackets (String -> SDoc
text String
"~")
   ppr (ActiveBefore SourceText
_ Int
n) = SDoc -> SDoc
brackets (Char -> SDoc
char Char
'~' SDoc -> SDoc -> SDoc
<> Int -> SDoc
int Int
n)
   ppr (ActiveAfter  SourceText
_ Int
n) = SDoc -> SDoc
brackets (Int -> SDoc
int Int
n)
   ppr Activation
FinalActive        = String -> SDoc
text String
"[final]"

instance Outputable RuleMatchInfo where
   ppr :: RuleMatchInfo -> SDoc
ppr RuleMatchInfo
ConLike = String -> SDoc
text String
"CONLIKE"
   ppr RuleMatchInfo
FunLike = String -> SDoc
text String
"FUNLIKE"

instance Outputable InlineSpec where
   ppr :: InlineSpec -> SDoc
ppr InlineSpec
Inline       = String -> SDoc
text String
"INLINE"
   ppr InlineSpec
NoInline     = String -> SDoc
text String
"NOINLINE"
   ppr InlineSpec
Inlinable    = String -> SDoc
text String
"INLINABLE"
   ppr InlineSpec
NoUserInline = String -> SDoc
text String
"NOUSERINLINE" -- what is better?

instance Outputable InlinePragma where
  ppr :: InlinePragma -> SDoc
ppr = InlinePragma -> SDoc
pprInline

pprInline :: InlinePragma -> SDoc
pprInline :: InlinePragma -> SDoc
pprInline = Bool -> InlinePragma -> SDoc
pprInline' Bool
True

pprInlineDebug :: InlinePragma -> SDoc
pprInlineDebug :: InlinePragma -> SDoc
pprInlineDebug = Bool -> InlinePragma -> SDoc
pprInline' Bool
False

pprInline' :: Bool           -- True <=> do not display the inl_inline field
           -> InlinePragma
           -> SDoc
pprInline' :: Bool -> InlinePragma -> SDoc
pprInline' Bool
emptyInline (InlinePragma { inl_inline :: InlinePragma -> InlineSpec
inl_inline = InlineSpec
inline, inl_act :: InlinePragma -> Activation
inl_act = Activation
activation
                                    , inl_rule :: InlinePragma -> RuleMatchInfo
inl_rule = RuleMatchInfo
info, inl_sat :: InlinePragma -> Maybe Int
inl_sat = Maybe Int
mb_arity })
    = InlineSpec -> SDoc
forall a. Outputable a => a -> SDoc
pp_inl InlineSpec
inline SDoc -> SDoc -> SDoc
<> InlineSpec -> Activation -> SDoc
pp_act InlineSpec
inline Activation
activation SDoc -> SDoc -> SDoc
<+> SDoc
pp_sat SDoc -> SDoc -> SDoc
<+> SDoc
pp_info
    where
      pp_inl :: a -> SDoc
pp_inl a
x = if Bool
emptyInline then SDoc
empty else a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
x

      pp_act :: InlineSpec -> Activation -> SDoc
pp_act InlineSpec
Inline   Activation
AlwaysActive = SDoc
empty
      pp_act InlineSpec
NoInline Activation
NeverActive  = SDoc
empty
      pp_act InlineSpec
_        Activation
act          = Activation -> SDoc
forall a. Outputable a => a -> SDoc
ppr Activation
act

      pp_sat :: SDoc
pp_sat | Just Int
ar <- Maybe Int
mb_arity = SDoc -> SDoc
parens (String -> SDoc
text String
"sat-args=" SDoc -> SDoc -> SDoc
<> Int -> SDoc
int Int
ar)
             | Bool
otherwise           = SDoc
empty
      pp_info :: SDoc
pp_info | RuleMatchInfo -> Bool
isFunLike RuleMatchInfo
info = SDoc
empty
              | Bool
otherwise      = RuleMatchInfo -> SDoc
forall a. Outputable a => a -> SDoc
ppr RuleMatchInfo
info



{- *********************************************************************
*                                                                      *
                 Integer literals
*                                                                      *
********************************************************************* -}

-- | Integral Literal
--
-- Used (instead of Integer) to represent negative zegative zero which is
-- required for NegativeLiterals extension to correctly parse `-0::Double`
-- as negative zero. See also #13211.
data IntegralLit
  = IL { IntegralLit -> SourceText
il_text :: SourceText
       , IntegralLit -> Bool
il_neg :: Bool -- See Note [Negative zero]
       , IntegralLit -> Integer
il_value :: Integer
       }
  deriving (Typeable IntegralLit
Typeable IntegralLit
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> IntegralLit -> c IntegralLit)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c IntegralLit)
-> (IntegralLit -> Constr)
-> (IntegralLit -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c IntegralLit))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e))
    -> Maybe (c IntegralLit))
-> ((forall b. Data b => b -> b) -> IntegralLit -> IntegralLit)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> IntegralLit -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> IntegralLit -> r)
-> (forall u. (forall d. Data d => d -> u) -> IntegralLit -> [u])
-> (forall u.
    Int -> (forall d. Data d => d -> u) -> IntegralLit -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> IntegralLit -> m IntegralLit)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> IntegralLit -> m IntegralLit)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> IntegralLit -> m IntegralLit)
-> Data IntegralLit
IntegralLit -> DataType
IntegralLit -> Constr
(forall b. Data b => b -> b) -> IntegralLit -> IntegralLit
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) -> IntegralLit -> u
forall u. (forall d. Data d => d -> u) -> IntegralLit -> [u]
forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> IntegralLit -> r
forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> IntegralLit -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> IntegralLit -> m IntegralLit
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> IntegralLit -> m IntegralLit
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c IntegralLit
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> IntegralLit -> c IntegralLit
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c IntegralLit)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c IntegralLit)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> IntegralLit -> m IntegralLit
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> IntegralLit -> m IntegralLit
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> IntegralLit -> m IntegralLit
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> IntegralLit -> m IntegralLit
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> IntegralLit -> m IntegralLit
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> IntegralLit -> m IntegralLit
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> IntegralLit -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> IntegralLit -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> IntegralLit -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> IntegralLit -> [u]
gmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> IntegralLit -> r
$cgmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> IntegralLit -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> IntegralLit -> r
$cgmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> IntegralLit -> r
gmapT :: (forall b. Data b => b -> b) -> IntegralLit -> IntegralLit
$cgmapT :: (forall b. Data b => b -> b) -> IntegralLit -> IntegralLit
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c IntegralLit)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c IntegralLit)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c IntegralLit)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c IntegralLit)
dataTypeOf :: IntegralLit -> DataType
$cdataTypeOf :: IntegralLit -> DataType
toConstr :: IntegralLit -> Constr
$ctoConstr :: IntegralLit -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c IntegralLit
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c IntegralLit
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> IntegralLit -> c IntegralLit
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> IntegralLit -> c IntegralLit
Data, Int -> IntegralLit -> ShowS
[IntegralLit] -> ShowS
IntegralLit -> String
(Int -> IntegralLit -> ShowS)
-> (IntegralLit -> String)
-> ([IntegralLit] -> ShowS)
-> Show IntegralLit
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [IntegralLit] -> ShowS
$cshowList :: [IntegralLit] -> ShowS
show :: IntegralLit -> String
$cshow :: IntegralLit -> String
showsPrec :: Int -> IntegralLit -> ShowS
$cshowsPrec :: Int -> IntegralLit -> ShowS
Show)

mkIntegralLit :: Integral a => a -> IntegralLit
mkIntegralLit :: forall a. Integral a => a -> IntegralLit
mkIntegralLit a
i = IL :: SourceText -> Bool -> Integer -> IntegralLit
IL { il_text :: SourceText
il_text = String -> SourceText
SourceText (Integer -> String
forall a. Show a => a -> String
show Integer
i_integer)
                     , il_neg :: Bool
il_neg = a
i a -> a -> Bool
forall a. Ord a => a -> a -> Bool
< a
0
                     , il_value :: Integer
il_value = Integer
i_integer }
  where
    i_integer :: Integer
    i_integer :: Integer
i_integer = a -> Integer
forall a. Integral a => a -> Integer
toInteger a
i

negateIntegralLit :: IntegralLit -> IntegralLit
negateIntegralLit :: IntegralLit -> IntegralLit
negateIntegralLit (IL SourceText
text Bool
neg Integer
value)
  = case SourceText
text of
      SourceText (Char
'-':String
src) -> SourceText -> Bool -> Integer -> IntegralLit
IL (String -> SourceText
SourceText String
src)       Bool
False    (Integer -> Integer
forall a. Num a => a -> a
negate Integer
value)
      SourceText      String
src  -> SourceText -> Bool -> Integer -> IntegralLit
IL (String -> SourceText
SourceText (Char
'-'Char -> ShowS
forall a. a -> [a] -> [a]
:String
src)) Bool
True     (Integer -> Integer
forall a. Num a => a -> a
negate Integer
value)
      SourceText
NoSourceText         -> SourceText -> Bool -> Integer -> IntegralLit
IL SourceText
NoSourceText          (Bool -> Bool
not Bool
neg) (Integer -> Integer
forall a. Num a => a -> a
negate Integer
value)

-- | Fractional Literal
--
-- Used (instead of Rational) to represent exactly the floating point literal that we
-- encountered in the user's source program. This allows us to pretty-print exactly what
-- the user wrote, which is important e.g. for floating point numbers that can't represented
-- as Doubles (we used to via Double for pretty-printing). See also #2245.
data FractionalLit
  = FL { FractionalLit -> SourceText
fl_text :: SourceText     -- How the value was written in the source
       , FractionalLit -> Bool
fl_neg :: Bool            -- See Note [Negative zero]
       , FractionalLit -> Rational
fl_value :: Rational      -- Numeric value of the literal
       }
  deriving (Typeable FractionalLit
Typeable FractionalLit
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g) -> FractionalLit -> c FractionalLit)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c FractionalLit)
-> (FractionalLit -> Constr)
-> (FractionalLit -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c FractionalLit))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e))
    -> Maybe (c FractionalLit))
-> ((forall b. Data b => b -> b) -> FractionalLit -> FractionalLit)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> FractionalLit -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> FractionalLit -> r)
-> (forall u. (forall d. Data d => d -> u) -> FractionalLit -> [u])
-> (forall u.
    Int -> (forall d. Data d => d -> u) -> FractionalLit -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d) -> FractionalLit -> m FractionalLit)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> FractionalLit -> m FractionalLit)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d) -> FractionalLit -> m FractionalLit)
-> Data FractionalLit
FractionalLit -> DataType
FractionalLit -> Constr
(forall b. Data b => b -> b) -> FractionalLit -> FractionalLit
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) -> FractionalLit -> u
forall u. (forall d. Data d => d -> u) -> FractionalLit -> [u]
forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> FractionalLit -> r
forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> FractionalLit -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> FractionalLit -> m FractionalLit
forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> FractionalLit -> m FractionalLit
forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c FractionalLit
forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> FractionalLit -> c FractionalLit
forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c FractionalLit)
forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c FractionalLit)
gmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> FractionalLit -> m FractionalLit
$cgmapMo :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> FractionalLit -> m FractionalLit
gmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> FractionalLit -> m FractionalLit
$cgmapMp :: forall (m :: * -> *).
MonadPlus m =>
(forall d. Data d => d -> m d) -> FractionalLit -> m FractionalLit
gmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> FractionalLit -> m FractionalLit
$cgmapM :: forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d) -> FractionalLit -> m FractionalLit
gmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> FractionalLit -> u
$cgmapQi :: forall u. Int -> (forall d. Data d => d -> u) -> FractionalLit -> u
gmapQ :: forall u. (forall d. Data d => d -> u) -> FractionalLit -> [u]
$cgmapQ :: forall u. (forall d. Data d => d -> u) -> FractionalLit -> [u]
gmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> FractionalLit -> r
$cgmapQr :: forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> FractionalLit -> r
gmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> FractionalLit -> r
$cgmapQl :: forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> FractionalLit -> r
gmapT :: (forall b. Data b => b -> b) -> FractionalLit -> FractionalLit
$cgmapT :: (forall b. Data b => b -> b) -> FractionalLit -> FractionalLit
dataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c FractionalLit)
$cdataCast2 :: forall (t :: * -> * -> *) (c :: * -> *).
Typeable t =>
(forall d e. (Data d, Data e) => c (t d e))
-> Maybe (c FractionalLit)
dataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c FractionalLit)
$cdataCast1 :: forall (t :: * -> *) (c :: * -> *).
Typeable t =>
(forall d. Data d => c (t d)) -> Maybe (c FractionalLit)
dataTypeOf :: FractionalLit -> DataType
$cdataTypeOf :: FractionalLit -> DataType
toConstr :: FractionalLit -> Constr
$ctoConstr :: FractionalLit -> Constr
gunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c FractionalLit
$cgunfold :: forall (c :: * -> *).
(forall b r. Data b => c (b -> r) -> c r)
-> (forall r. r -> c r) -> Constr -> c FractionalLit
gfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> FractionalLit -> c FractionalLit
$cgfoldl :: forall (c :: * -> *).
(forall d b. Data d => c (d -> b) -> d -> c b)
-> (forall g. g -> c g) -> FractionalLit -> c FractionalLit
Data, Int -> FractionalLit -> ShowS
[FractionalLit] -> ShowS
FractionalLit -> String
(Int -> FractionalLit -> ShowS)
-> (FractionalLit -> String)
-> ([FractionalLit] -> ShowS)
-> Show FractionalLit
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [FractionalLit] -> ShowS
$cshowList :: [FractionalLit] -> ShowS
show :: FractionalLit -> String
$cshow :: FractionalLit -> String
showsPrec :: Int -> FractionalLit -> ShowS
$cshowsPrec :: Int -> FractionalLit -> ShowS
Show)
  -- The Show instance is required for the derived GHC.Parser.Lexer.Token instance when DEBUG is on

mkFractionalLit :: Real a => a -> FractionalLit
mkFractionalLit :: forall a. Real a => a -> FractionalLit
mkFractionalLit a
r = FL :: SourceText -> Bool -> Rational -> FractionalLit
FL { fl_text :: SourceText
fl_text = String -> SourceText
SourceText (Double -> String
forall a. Show a => a -> String
show (a -> Double
forall a b. (Real a, Fractional b) => a -> b
realToFrac a
r::Double))
                           -- Converting to a Double here may technically lose
                           -- precision (see #15502). We could alternatively
                           -- convert to a Rational for the most accuracy, but
                           -- it would cause Floats and Doubles to be displayed
                           -- strangely, so we opt not to do this. (In contrast
                           -- to mkIntegralLit, where we always convert to an
                           -- Integer for the highest accuracy.)
                       , fl_neg :: Bool
fl_neg = a
r a -> a -> Bool
forall a. Ord a => a -> a -> Bool
< a
0
                       , fl_value :: Rational
fl_value = a -> Rational
forall a. Real a => a -> Rational
toRational a
r }

negateFractionalLit :: FractionalLit -> FractionalLit
negateFractionalLit :: FractionalLit -> FractionalLit
negateFractionalLit (FL SourceText
text Bool
neg Rational
value)
  = case SourceText
text of
      SourceText (Char
'-':String
src) -> SourceText -> Bool -> Rational -> FractionalLit
FL (String -> SourceText
SourceText String
src)     Bool
False Rational
value
      SourceText      String
src  -> SourceText -> Bool -> Rational -> FractionalLit
FL (String -> SourceText
SourceText (Char
'-'Char -> ShowS
forall a. a -> [a] -> [a]
:String
src)) Bool
True  Rational
value
      SourceText
NoSourceText         -> SourceText -> Bool -> Rational -> FractionalLit
FL SourceText
NoSourceText (Bool -> Bool
not Bool
neg) (Rational -> Rational
forall a. Num a => a -> a
negate Rational
value)

integralFractionalLit :: Bool -> Integer -> FractionalLit
integralFractionalLit :: Bool -> Integer -> FractionalLit
integralFractionalLit Bool
neg Integer
i = FL :: SourceText -> Bool -> Rational -> FractionalLit
FL { fl_text :: SourceText
fl_text = String -> SourceText
SourceText (Integer -> String
forall a. Show a => a -> String
show Integer
i),
                                   fl_neg :: Bool
fl_neg = Bool
neg,
                                   fl_value :: Rational
fl_value = Integer -> Rational
forall a. Num a => Integer -> a
fromInteger Integer
i }

-- Comparison operations are needed when grouping literals
-- for compiling pattern-matching (module GHC.HsToCore.Match.Literal)

instance Eq IntegralLit where
  == :: IntegralLit -> IntegralLit -> Bool
(==) = Integer -> Integer -> Bool
forall a. Eq a => a -> a -> Bool
(==) (Integer -> Integer -> Bool)
-> (IntegralLit -> Integer) -> IntegralLit -> IntegralLit -> Bool
forall b c a. (b -> b -> c) -> (a -> b) -> a -> a -> c
`on` IntegralLit -> Integer
il_value

instance Ord IntegralLit where
  compare :: IntegralLit -> IntegralLit -> Ordering
compare = Integer -> Integer -> Ordering
forall a. Ord a => a -> a -> Ordering
compare (Integer -> Integer -> Ordering)
-> (IntegralLit -> Integer)
-> IntegralLit
-> IntegralLit
-> Ordering
forall b c a. (b -> b -> c) -> (a -> b) -> a -> a -> c
`on` IntegralLit -> Integer
il_value

instance Outputable IntegralLit where
  ppr :: IntegralLit -> SDoc
ppr (IL (SourceText String
src) Bool
_ Integer
_) = String -> SDoc
text String
src
  ppr (IL SourceText
NoSourceText Bool
_ Integer
value) = String -> SDoc
text (Integer -> String
forall a. Show a => a -> String
show Integer
value)

instance Eq FractionalLit where
  == :: FractionalLit -> FractionalLit -> Bool
(==) = Rational -> Rational -> Bool
forall a. Eq a => a -> a -> Bool
(==) (Rational -> Rational -> Bool)
-> (FractionalLit -> Rational)
-> FractionalLit
-> FractionalLit
-> Bool
forall b c a. (b -> b -> c) -> (a -> b) -> a -> a -> c
`on` FractionalLit -> Rational
fl_value

instance Ord FractionalLit where
  compare :: FractionalLit -> FractionalLit -> Ordering
compare = Rational -> Rational -> Ordering
forall a. Ord a => a -> a -> Ordering
compare (Rational -> Rational -> Ordering)
-> (FractionalLit -> Rational)
-> FractionalLit
-> FractionalLit
-> Ordering
forall b c a. (b -> b -> c) -> (a -> b) -> a -> a -> c
`on` FractionalLit -> Rational
fl_value

instance Outputable FractionalLit where
  ppr :: FractionalLit -> SDoc
ppr FractionalLit
f = SourceText -> SDoc -> SDoc
pprWithSourceText (FractionalLit -> SourceText
fl_text FractionalLit
f) (Rational -> SDoc
rational (FractionalLit -> Rational
fl_value FractionalLit
f))

{-
************************************************************************
*                                                                      *
    IntWithInf
*                                                                      *
************************************************************************

Represents an integer or positive infinity

-}

-- | An integer or infinity
data IntWithInf = Int {-# UNPACK #-} !Int
                | Infinity
  deriving IntWithInf -> IntWithInf -> Bool
(IntWithInf -> IntWithInf -> Bool)
-> (IntWithInf -> IntWithInf -> Bool) -> Eq IntWithInf
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: IntWithInf -> IntWithInf -> Bool
$c/= :: IntWithInf -> IntWithInf -> Bool
== :: IntWithInf -> IntWithInf -> Bool
$c== :: IntWithInf -> IntWithInf -> Bool
Eq

-- | A representation of infinity
infinity :: IntWithInf
infinity :: IntWithInf
infinity = IntWithInf
Infinity

instance Ord IntWithInf where
  compare :: IntWithInf -> IntWithInf -> Ordering
compare IntWithInf
Infinity IntWithInf
Infinity = Ordering
EQ
  compare (Int Int
_)  IntWithInf
Infinity = Ordering
LT
  compare IntWithInf
Infinity (Int Int
_)  = Ordering
GT
  compare (Int Int
a)  (Int Int
b)  = Int
a Int -> Int -> Ordering
forall a. Ord a => a -> a -> Ordering
`compare` Int
b

instance Outputable IntWithInf where
  ppr :: IntWithInf -> SDoc
ppr IntWithInf
Infinity = Char -> SDoc
char Char
'∞'
  ppr (Int Int
n)  = Int -> SDoc
int Int
n

instance Num IntWithInf where
  + :: IntWithInf -> IntWithInf -> IntWithInf
(+) = IntWithInf -> IntWithInf -> IntWithInf
plusWithInf
  * :: IntWithInf -> IntWithInf -> IntWithInf
(*) = IntWithInf -> IntWithInf -> IntWithInf
mulWithInf

  abs :: IntWithInf -> IntWithInf
abs IntWithInf
Infinity = IntWithInf
Infinity
  abs (Int Int
n)  = Int -> IntWithInf
Int (Int -> Int
forall a. Num a => a -> a
abs Int
n)

  signum :: IntWithInf -> IntWithInf
signum IntWithInf
Infinity = Int -> IntWithInf
Int Int
1
  signum (Int Int
n)  = Int -> IntWithInf
Int (Int -> Int
forall a. Num a => a -> a
signum Int
n)

  fromInteger :: Integer -> IntWithInf
fromInteger = Int -> IntWithInf
Int (Int -> IntWithInf) -> (Integer -> Int) -> Integer -> IntWithInf
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Integer -> Int
forall a. Num a => Integer -> a
fromInteger

  (-) = String -> IntWithInf -> IntWithInf -> IntWithInf
forall a. String -> a
panic String
"subtracting IntWithInfs"

intGtLimit :: Int -> IntWithInf -> Bool
intGtLimit :: Int -> IntWithInf -> Bool
intGtLimit Int
_ IntWithInf
Infinity = Bool
False
intGtLimit Int
n (Int Int
m)  = Int
n Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
> Int
m

-- | Add two 'IntWithInf's
plusWithInf :: IntWithInf -> IntWithInf -> IntWithInf
plusWithInf :: IntWithInf -> IntWithInf -> IntWithInf
plusWithInf IntWithInf
Infinity IntWithInf
_        = IntWithInf
Infinity
plusWithInf IntWithInf
_        IntWithInf
Infinity = IntWithInf
Infinity
plusWithInf (Int Int
a)  (Int Int
b)  = Int -> IntWithInf
Int (Int
a Int -> Int -> Int
forall a. Num a => a -> a -> a
+ Int
b)

-- | Multiply two 'IntWithInf's
mulWithInf :: IntWithInf -> IntWithInf -> IntWithInf
mulWithInf :: IntWithInf -> IntWithInf -> IntWithInf
mulWithInf IntWithInf
Infinity IntWithInf
_        = IntWithInf
Infinity
mulWithInf IntWithInf
_        IntWithInf
Infinity = IntWithInf
Infinity
mulWithInf (Int Int
a)  (Int Int
b)  = Int -> IntWithInf
Int (Int
a Int -> Int -> Int
forall a. Num a => a -> a -> a
* Int
b)

-- | Turn a positive number into an 'IntWithInf', where 0 represents infinity
treatZeroAsInf :: Int -> IntWithInf
treatZeroAsInf :: Int -> IntWithInf
treatZeroAsInf Int
0 = IntWithInf
Infinity
treatZeroAsInf Int
n = Int -> IntWithInf
Int Int
n

-- | Inject any integer into an 'IntWithInf'
mkIntWithInf :: Int -> IntWithInf
mkIntWithInf :: Int -> IntWithInf
mkIntWithInf = Int -> IntWithInf
Int

data SpliceExplicitFlag
          = ExplicitSplice | -- ^ <=> $(f x y)
            ImplicitSplice   -- ^ <=> f x y,  i.e. a naked top level expression
    deriving Typeable SpliceExplicitFlag
Typeable SpliceExplicitFlag
-> (forall (c :: * -> *).
    (forall d b. Data d => c (d -> b) -> d -> c b)
    -> (forall g. g -> c g)
    -> SpliceExplicitFlag
    -> c SpliceExplicitFlag)
-> (forall (c :: * -> *).
    (forall b r. Data b => c (b -> r) -> c r)
    -> (forall r. r -> c r) -> Constr -> c SpliceExplicitFlag)
-> (SpliceExplicitFlag -> Constr)
-> (SpliceExplicitFlag -> DataType)
-> (forall (t :: * -> *) (c :: * -> *).
    Typeable t =>
    (forall d. Data d => c (t d)) -> Maybe (c SpliceExplicitFlag))
-> (forall (t :: * -> * -> *) (c :: * -> *).
    Typeable t =>
    (forall d e. (Data d, Data e) => c (t d e))
    -> Maybe (c SpliceExplicitFlag))
-> ((forall b. Data b => b -> b)
    -> SpliceExplicitFlag -> SpliceExplicitFlag)
-> (forall r r'.
    (r -> r' -> r)
    -> r -> (forall d. Data d => d -> r') -> SpliceExplicitFlag -> r)
-> (forall r r'.
    (r' -> r -> r)
    -> r -> (forall d. Data d => d -> r') -> SpliceExplicitFlag -> r)
-> (forall u.
    (forall d. Data d => d -> u) -> SpliceExplicitFlag -> [u])
-> (forall u.
    Int -> (forall d. Data d => d -> u) -> SpliceExplicitFlag -> u)
-> (forall (m :: * -> *).
    Monad m =>
    (forall d. Data d => d -> m d)
    -> SpliceExplicitFlag -> m SpliceExplicitFlag)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d)
    -> SpliceExplicitFlag -> m SpliceExplicitFlag)
-> (forall (m :: * -> *).
    MonadPlus m =>
    (forall d. Data d => d -> m d)
    -> SpliceExplicitFlag -> m SpliceExplicitFlag)
-> Data SpliceExplicitFlag
SpliceExplicitFlag -> DataType
SpliceExplicitFlag -> Constr
(forall b. Data b => b -> b)
-> SpliceExplicitFlag -> SpliceExplicitFlag
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) -> SpliceExplicitFlag -> u
forall u. (forall d. Data d => d -> u) -> SpliceExplicitFlag -> [u]
forall r r'.
(r -> r' -> r)
-> r -> (forall d. Data d => d -> r') -> SpliceExplicitFlag -> r
forall r r'.
(r' -> r -> r)
-> r -> (forall d. Data d => d -> r') -> SpliceExplicitFlag -> r
forall (m :: * -> *).
Monad m =>
(forall d. Data d => d -> m d)
-> SpliceExplicitFlag -> m SpliceExplicitFlag
forall (m :: * -> *).
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{- *********************************************************************
*                                                                      *
                        Types vs Kinds
*                                                                      *
********************************************************************* -}

-- | Flag to see whether we're type-checking terms or kind-checking types
data TypeOrKind = TypeLevel | KindLevel
  deriving TypeOrKind -> TypeOrKind -> Bool
(TypeOrKind -> TypeOrKind -> Bool)
-> (TypeOrKind -> TypeOrKind -> Bool) -> Eq TypeOrKind
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: TypeOrKind -> TypeOrKind -> Bool
$c/= :: TypeOrKind -> TypeOrKind -> Bool
== :: TypeOrKind -> TypeOrKind -> Bool
$c== :: TypeOrKind -> TypeOrKind -> Bool
Eq

instance Outputable TypeOrKind where
  ppr :: TypeOrKind -> SDoc
ppr TypeOrKind
TypeLevel = String -> SDoc
text String
"TypeLevel"
  ppr TypeOrKind
KindLevel = String -> SDoc
text String
"KindLevel"

isTypeLevel :: TypeOrKind -> Bool
isTypeLevel :: TypeOrKind -> Bool
isTypeLevel TypeOrKind
TypeLevel = Bool
True
isTypeLevel TypeOrKind
KindLevel = Bool
False

isKindLevel :: TypeOrKind -> Bool
isKindLevel :: TypeOrKind -> Bool
isKindLevel TypeOrKind
TypeLevel = Bool
False
isKindLevel TypeOrKind
KindLevel = Bool
True