-----------------------------------------------------------------------------
-- |
-- Module      :  GHC.LanguageExtensions.Type
-- Copyright   :  (c) The GHC Team
--
-- Maintainer  :  ghc-devs@haskell.org
-- Portability :  portable
--
-- A data type defining the language extensions supported by GHC.
--
{-# LANGUAGE DeriveGeneric, Safe #-}
module GHC.LanguageExtensions.Type ( Extension(..) ) where

import Prelude -- See note [Why do we import Prelude here?]
import GHC.Generics

-- | The language extensions known to GHC.
--
-- Note that there is an orphan 'Binary' instance for this type supplied by
-- the "GHC.LanguageExtensions" module provided by @ghc-boot@. We can't provide
-- here as this would require adding transitive dependencies to the
-- @template-haskell@ package, which must have a minimal dependency set.
data Extension
-- See Note [Updating flag description in the User's Guide] in
-- GHC.Driver.Session
   = Cpp
   | OverlappingInstances
   | UndecidableInstances
   | IncoherentInstances
   | UndecidableSuperClasses
   | MonomorphismRestriction
   | MonoLocalBinds
   | DeepSubsumption
   | RelaxedPolyRec           -- Deprecated
   | ExtendedDefaultRules     -- Use GHC's extended rules for defaulting
   | ForeignFunctionInterface
   | UnliftedFFITypes
   | InterruptibleFFI
   | CApiFFI
   | GHCForeignImportPrim
   | JavaScriptFFI
   | ParallelArrays           -- Syntactic support for parallel arrays
   | Arrows                   -- Arrow-notation syntax
   | TemplateHaskell
   | TemplateHaskellQuotes    -- subset of TH supported by stage1, no splice
   | QualifiedDo
   | QuasiQuotes
   | ImplicitParams
   | ImplicitPrelude
   | ScopedTypeVariables
   | AllowAmbiguousTypes
   | UnboxedTuples
   | UnboxedSums
   | UnliftedNewtypes
   | UnliftedDatatypes
   | BangPatterns
   | TypeFamilies
   | TypeFamilyDependencies
   | TypeInType
   | OverloadedStrings
   | OverloadedLists
   | NumDecimals
   | DisambiguateRecordFields
   | RecordWildCards
   | RecordPuns
   | ViewPatterns
   | GADTs
   | GADTSyntax
   | NPlusKPatterns
   | DoAndIfThenElse
   | BlockArguments
   | RebindableSyntax
   | ConstraintKinds
   | PolyKinds                -- Kind polymorphism
   | DataKinds                -- Datatype promotion
   | InstanceSigs
   | ApplicativeDo
   | LinearTypes

   | StandaloneDeriving
   | DeriveDataTypeable
   | AutoDeriveTypeable       -- Automatic derivation of Typeable
   | DeriveFunctor
   | DeriveTraversable
   | DeriveFoldable
   | DeriveGeneric            -- Allow deriving Generic/1
   | DefaultSignatures        -- Allow extra signatures for defmeths
   | DeriveAnyClass           -- Allow deriving any class
   | DeriveLift               -- Allow deriving Lift
   | DerivingStrategies
   | DerivingVia              -- Derive through equal representation

   | TypeSynonymInstances
   | FlexibleContexts
   | FlexibleInstances
   | ConstrainedClassMethods
   | MultiParamTypeClasses
   | NullaryTypeClasses
   | FunctionalDependencies
   | UnicodeSyntax
   | ExistentialQuantification
   | MagicHash
   | EmptyDataDecls
   | KindSignatures
   | RoleAnnotations
   | ParallelListComp
   | TransformListComp
   | MonadComprehensions
   | GeneralizedNewtypeDeriving
   | RecursiveDo
   | PostfixOperators
   | TupleSections
   | PatternGuards
   | LiberalTypeSynonyms
   | RankNTypes
   | ImpredicativeTypes
   | TypeOperators
   | ExplicitNamespaces
   | PackageImports
   | ExplicitForAll
   | AlternativeLayoutRule
   | AlternativeLayoutRuleTransitional
   | DatatypeContexts
   | NondecreasingIndentation
   | RelaxedLayout
   | TraditionalRecordSyntax
   | LambdaCase
   | MultiWayIf
   | BinaryLiterals
   | NegativeLiterals
   | HexFloatLiterals
   | DuplicateRecordFields
   | OverloadedLabels
   | EmptyCase
   | PatternSynonyms
   | PartialTypeSignatures
   | NamedWildCards
   | StaticPointers
   | TypeApplications
   | Strict
   | StrictData
   | EmptyDataDeriving
   | NumericUnderscores
   | QuantifiedConstraints
   | StarIsType
   | ImportQualifiedPost
   | CUSKs
   | StandaloneKindSignatures
   | LexicalNegation
   | FieldSelectors
   | OverloadedRecordDot
   | OverloadedRecordUpdate
   deriving (Extension -> Extension -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Extension -> Extension -> Bool
$c/= :: Extension -> Extension -> Bool
== :: Extension -> Extension -> Bool
$c== :: Extension -> Extension -> Bool
Eq, Int -> Extension
Extension -> Int
Extension -> [Extension]
Extension -> Extension
Extension -> Extension -> [Extension]
Extension -> Extension -> Extension -> [Extension]
forall a.
(a -> a)
-> (a -> a)
-> (Int -> a)
-> (a -> Int)
-> (a -> [a])
-> (a -> a -> [a])
-> (a -> a -> [a])
-> (a -> a -> a -> [a])
-> Enum a
enumFromThenTo :: Extension -> Extension -> Extension -> [Extension]
$cenumFromThenTo :: Extension -> Extension -> Extension -> [Extension]
enumFromTo :: Extension -> Extension -> [Extension]
$cenumFromTo :: Extension -> Extension -> [Extension]
enumFromThen :: Extension -> Extension -> [Extension]
$cenumFromThen :: Extension -> Extension -> [Extension]
enumFrom :: Extension -> [Extension]
$cenumFrom :: Extension -> [Extension]
fromEnum :: Extension -> Int
$cfromEnum :: Extension -> Int
toEnum :: Int -> Extension
$ctoEnum :: Int -> Extension
pred :: Extension -> Extension
$cpred :: Extension -> Extension
succ :: Extension -> Extension
$csucc :: Extension -> Extension
Enum, Int -> Extension -> ShowS
[Extension] -> ShowS
Extension -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [Extension] -> ShowS
$cshowList :: [Extension] -> ShowS
show :: Extension -> String
$cshow :: Extension -> String
showsPrec :: Int -> Extension -> ShowS
$cshowsPrec :: Int -> Extension -> ShowS
Show, forall x. Rep Extension x -> Extension
forall x. Extension -> Rep Extension x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
$cto :: forall x. Rep Extension x -> Extension
$cfrom :: forall x. Extension -> Rep Extension x
Generic, Extension
forall a. a -> a -> Bounded a
maxBound :: Extension
$cmaxBound :: Extension
minBound :: Extension
$cminBound :: Extension
Bounded)
-- 'Ord' and 'Bounded' are provided for GHC API users (see discussions
-- in https://gitlab.haskell.org/ghc/ghc/merge_requests/2707 and
-- https://gitlab.haskell.org/ghc/ghc/merge_requests/826).
instance Ord Extension where compare :: Extension -> Extension -> Ordering
compare Extension
a Extension
b = forall a. Ord a => a -> a -> Ordering
compare (forall a. Enum a => a -> Int
fromEnum Extension
a) (forall a. Enum a => a -> Int
fromEnum Extension
b)