Language.Haskell.Extension

Cabal-2.4.0.1: A framework for packaging Haskell software

Copyright | Isaac Jones 2003-2004
License | BSD3
Maintainer | libraries@haskell.org
Portability | portable
Safe Haskell | None
Language | Haskell2010

Language.Haskell.Extension

Description

Haskell language dialects and extensions

Synopsis

- data Language
  - = Haskell98
  - | Haskell2010
  - | UnknownLanguage String
- knownLanguages :: [Language]
- classifyLanguage :: String -> Language
- data Extension
  - = EnableExtension KnownExtension
  - | DisableExtension KnownExtension
  - | UnknownExtension String
- data KnownExtension
  - = OverlappingInstances
  - | UndecidableInstances
  - | IncoherentInstances
  - | DoRec
  - | RecursiveDo
  - | ParallelListComp
  - | MultiParamTypeClasses
  - | MonomorphismRestriction
  - | FunctionalDependencies
  - | Rank2Types
  - | RankNTypes
  - | PolymorphicComponents
  - | ExistentialQuantification
  - | ScopedTypeVariables
  - | PatternSignatures
  - | ImplicitParams
  - | FlexibleContexts
  - | FlexibleInstances
  - | EmptyDataDecls
  - | CPP
  - | KindSignatures
  - | BangPatterns
  - | TypeSynonymInstances
  - | TemplateHaskell
  - | ForeignFunctionInterface
  - | Arrows
  - | Generics
  - | ImplicitPrelude
  - | NamedFieldPuns
  - | PatternGuards
  - | GeneralizedNewtypeDeriving
  - | ExtensibleRecords
  - | RestrictedTypeSynonyms
  - | HereDocuments
  - | MagicHash
  - | TypeFamilies
  - | StandaloneDeriving
  - | UnicodeSyntax
  - | UnliftedFFITypes
  - | InterruptibleFFI
  - | CApiFFI
  - | LiberalTypeSynonyms
  - | TypeOperators
  - | RecordWildCards
  - | RecordPuns
  - | DisambiguateRecordFields
  - | TraditionalRecordSyntax
  - | OverloadedStrings
  - | GADTs
  - | GADTSyntax
  - | MonoPatBinds
  - | RelaxedPolyRec
  - | ExtendedDefaultRules
  - | UnboxedTuples
  - | DeriveDataTypeable
  - | DeriveGeneric
  - | DefaultSignatures
  - | InstanceSigs
  - | ConstrainedClassMethods
  - | PackageImports
  - | ImpredicativeTypes
  - | NewQualifiedOperators
  - | PostfixOperators
  - | QuasiQuotes
  - | TransformListComp
  - | MonadComprehensions
  - | ViewPatterns
  - | XmlSyntax
  - | RegularPatterns
  - | TupleSections
  - | GHCForeignImportPrim
  - | NPlusKPatterns
  - | DoAndIfThenElse
  - | MultiWayIf
  - | LambdaCase
  - | RebindableSyntax
  - | ExplicitForAll
  - | DatatypeContexts
  - | MonoLocalBinds
  - | DeriveFunctor
  - | DeriveTraversable
  - | DeriveFoldable
  - | NondecreasingIndentation
  - | SafeImports
  - | Safe
  - | Trustworthy
  - | Unsafe
  - | ConstraintKinds
  - | PolyKinds
  - | DataKinds
  - | ParallelArrays
  - | RoleAnnotations
  - | OverloadedLists
  - | EmptyCase
  - | AutoDeriveTypeable
  - | NegativeLiterals
  - | BinaryLiterals
  - | NumDecimals
  - | NullaryTypeClasses
  - | ExplicitNamespaces
  - | AllowAmbiguousTypes
  - | JavaScriptFFI
  - | PatternSynonyms
  - | PartialTypeSignatures
  - | NamedWildCards
  - | DeriveAnyClass
  - | DeriveLift
  - | StaticPointers
  - | StrictData
  - | Strict
  - | ApplicativeDo
  - | DuplicateRecordFields
  - | TypeApplications
  - | TypeInType
  - | UndecidableSuperClasses
  - | MonadFailDesugaring
  - | TemplateHaskellQuotes
  - | OverloadedLabels
  - | TypeFamilyDependencies
  - | DerivingStrategies
  - | UnboxedSums
  - | HexFloatLiterals
  - | BlockArguments
  - | NumericUnderscores
  - | QuantifiedConstraints
  - | StarIsType
- knownExtensions :: [KnownExtension]
- deprecatedExtensions :: [(Extension, Maybe Extension)]
- classifyExtension :: String -> Extension

# Documentation

data Language #

This represents a Haskell language dialect.

Language `Extension`s are interpreted relative to one of these base languages.

Constructors

Haskell98 | The Haskell 98 language as defined by the Haskell 98 report. http://haskell.org/onlinereport/
Haskell2010 | The Haskell 2010 language as defined by the Haskell 2010 report. http://www.haskell.org/onlinereport/haskell2010
UnknownLanguage String | An unknown language, identified by its name.

Instances

Eq Language # |
Instance details Defined in Language.Haskell.Extension Methods (==) :: Language -> Language -> Bool # (/=) :: Language -> Language -> Bool #
Data Language # |
Instance details Defined in Language.Haskell.Extension Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Language -> c Language Source # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Language Source # toConstr :: Language -> Constr Source # dataTypeOf :: Language -> DataType Source # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Language) Source # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Language) Source # gmapT :: (forall b. Data b => b -> b) -> Language -> Language Source # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Language -> r Source # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Language -> r Source # gmapQ :: (forall d. Data d => d -> u) -> Language -> [u] Source # gmapQi :: Int -> (forall d. Data d => d -> u) -> Language -> u Source # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Language -> m Language Source # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Language -> m Language Source # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Language -> m Language Source #
Read Language # |
Instance details Defined in Language.Haskell.Extension Methods readsPrec :: Int -> ReadS Language Source # readList :: ReadS [Language] Source # readPrec :: ReadPrec Language Source # readListPrec :: ReadPrec [Language] Source #
Show Language # |
Instance details Defined in Language.Haskell.Extension Methods showsPrec :: Int -> Language -> ShowS Source # show :: Language -> String Source # showList :: [Language] -> ShowS Source #
Generic Language # |
Instance details Defined in Language.Haskell.Extension Associated Types type Rep Language :: Type -> Type Source # Methods from :: Language -> Rep Language x Source # to :: Rep Language x -> Language Source #
Binary Language # |
Instance details Defined in Language.Haskell.Extension Methods put :: Language -> Put Source # get :: Get Language Source # putList :: [Language] -> Put Source #
NFData Language # |
Instance details Defined in Language.Haskell.Extension Methods rnf :: Language -> () Source #
Pretty Language # |
Instance details Defined in Language.Haskell.Extension Methods pretty :: Language -> Doc #
Parsec Language # |
Instance details Defined in Language.Haskell.Extension Methods parsec :: CabalParsing m => m Language #
Text Language # |
Instance details Defined in Language.Haskell.Extension Methods disp :: Language -> Doc # parse :: ReadP r Language #
type Rep Language # |
Instance details Defined in Language.Haskell.Extension type Rep Language = D1 (MetaData "Language" "Language.Haskell.Extension" "Cabal-2.4.0.1" False) (C1 (MetaCons "Haskell98" PrefixI False) (U1 :: Type -> Type) :+: (C1 (MetaCons "Haskell2010" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "UnknownLanguage" PrefixI False) (S1 (MetaSel (Nothing :: Maybe Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 String))))

knownLanguages :: [Language] #

classifyLanguage :: String -> Language #

data Extension #

This represents language extensions beyond a base `Language` definition (such as `Haskell98`) that are supported by some implementations, usually in some special mode.

Where applicable, references are given to an implementation's official documentation.

Constructors

EnableExtension KnownExtension | Enable a known extension
DisableExtension KnownExtension | Disable a known extension
UnknownExtension String | An unknown extension, identified by the name of its `LANGUAGE` pragma.

Instances

Eq Extension # |
Instance details Defined in Language.Haskell.Extension Methods (==) :: Extension -> Extension -> Bool # (/=) :: Extension -> Extension -> Bool #
Data Extension # |
Instance details Defined in Language.Haskell.Extension Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Extension -> c Extension Source # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Extension Source # toConstr :: Extension -> Constr Source # dataTypeOf :: Extension -> DataType Source # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Extension) Source # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Extension) Source # gmapT :: (forall b. Data b => b -> b) -> Extension -> Extension Source # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Extension -> r Source # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Extension -> r Source # gmapQ :: (forall d. Data d => d -> u) -> Extension -> [u] Source # gmapQi :: Int -> (forall d. Data d => d -> u) -> Extension -> u Source # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Extension -> m Extension Source # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Extension -> m Extension Source # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Extension -> m Extension Source #
Ord Extension # |
Instance details Defined in Language.Haskell.Extension Methods compare :: Extension -> Extension -> Ordering # (<) :: Extension -> Extension -> Bool # (<=) :: Extension -> Extension -> Bool # (>) :: Extension -> Extension -> Bool # (>=) :: Extension -> Extension -> Bool # max :: Extension -> Extension -> Extension # min :: Extension -> Extension -> Extension #
Read Extension # |
Instance details Defined in Language.Haskell.Extension Methods readsPrec :: Int -> ReadS Extension Source # readList :: ReadS [Extension] Source # readPrec :: ReadPrec Extension Source # readListPrec :: ReadPrec [Extension] Source #
Show Extension # |
Instance details Defined in Language.Haskell.Extension Methods showsPrec :: Int -> Extension -> ShowS Source # show :: Extension -> String Source # showList :: [Extension] -> ShowS Source #
Generic Extension # |
Instance details Defined in Language.Haskell.Extension Associated Types type Rep Extension :: Type -> Type Source # Methods from :: Extension -> Rep Extension x Source # to :: Rep Extension x -> Extension Source #
Binary Extension # |
Instance details Defined in Language.Haskell.Extension Methods put :: Extension -> Put Source # get :: Get Extension Source # putList :: [Extension] -> Put Source #
NFData Extension # |
Instance details Defined in Language.Haskell.Extension Methods rnf :: Extension -> () Source #
Pretty Extension # |
Instance details Defined in Language.Haskell.Extension Methods pretty :: Extension -> Doc #
Parsec Extension # |
Instance details Defined in Language.Haskell.Extension Methods parsec :: CabalParsing m => m Extension #
Text Extension # |
Instance details Defined in Language.Haskell.Extension Methods disp :: Extension -> Doc # parse :: ReadP r Extension #
type Rep Extension # |
Instance details Defined in Language.Haskell.Extension type Rep Extension = D1 (MetaData "Extension" "Language.Haskell.Extension" "Cabal-2.4.0.1" False) (C1 (MetaCons "EnableExtension" PrefixI False) (S1 (MetaSel (Nothing :: Maybe Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 KnownExtension)) :+: (C1 (MetaCons "DisableExtension" PrefixI False) (S1 (MetaSel (Nothing :: Maybe Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 KnownExtension)) :+: C1 (MetaCons "UnknownExtension" PrefixI False) (S1 (MetaSel (Nothing :: Maybe Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 String))))

data KnownExtension #

Constructors

OverlappingInstances | Allow overlapping class instances, provided there is a unique most specific instance for each use. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XOverlappingInstances
UndecidableInstances | Ignore structural rules guaranteeing the termination of class instance resolution. Termination is guaranteed by a fixed-depth recursion stack, and compilation may fail if this depth is exceeded. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XUndecidableInstances
IncoherentInstances | Implies `OverlappingInstances`. Allow the implementation to choose an instance even when it is possible that further instantiation of types will lead to a more specific instance being applicable. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XIncoherentInstances
DoRec | (deprecated) Deprecated in favour of `RecursiveDo`. Old description: Allow recursive bindings in `do` blocks, using the `rec` keyword. See also `RecursiveDo`.
RecursiveDo | Allow recursive bindings in `do` blocks, using the `rec` keyword, or `mdo`, a variant of `do`. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XRecursiveDo
ParallelListComp | Provide syntax for writing list comprehensions which iterate over several lists together, like the `zipWith` family of functions. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XParallelListComp
MultiParamTypeClasses | Allow multiple parameters in a type class. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XMultiParamTypeClasses
MonomorphismRestriction | Enable the dreaded monomorphism restriction. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XNoMonomorphismRestriction
FunctionalDependencies | Allow a specification attached to a multi-parameter type class which indicates that some parameters are entirely determined by others. The implementation will check that this property holds for the declared instances, and will use this property to reduce ambiguity in instance resolution. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XFunctionalDependencies
Rank2Types | (deprecated) A synonym for `RankNTypes`. Old description: Like `RankNTypes` but does not allow a higher-rank type to itself appear on the left of a function arrow. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XRank2Types
RankNTypes | Allow a universally-quantified type to occur on the left of a function arrow. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XRankNTypes
PolymorphicComponents | (deprecated) A synonym for `RankNTypes`. Old description: Allow data constructors to have polymorphic arguments. Unlike `RankNTypes`, does not allow this for ordinary functions. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#arbitrary-rank-polymorphism
ExistentialQuantification | Allow existentially-quantified data constructors. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XExistentialQuantification
ScopedTypeVariables | Cause a type variable in a signature, which has an explicit `forall` quantifier, to scope over the definition of the accompanying value declaration. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XScopedTypeVariables
PatternSignatures | Deprecated, use `ScopedTypeVariables` instead.
ImplicitParams | Enable implicit function parameters with dynamic scope. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XImplicitParams
FlexibleContexts | Relax some restrictions on the form of the context of a type signature. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XFlexibleContexts
FlexibleInstances | Relax some restrictions on the form of the context of an instance declaration. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XFlexibleInstances
EmptyDataDecls | Allow data type declarations with no constructors. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XEmptyDataDecls
CPP | Run the C preprocessor on Haskell source code. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#language-pragma
KindSignatures | Allow an explicit kind signature giving the kind of types over which a type variable ranges. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XKindSignatures
BangPatterns | Enable a form of pattern which forces evaluation before an attempted match, and a form of strict `let`/`where` binding. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XBangPatterns
TypeSynonymInstances | Allow type synonyms in instance heads. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XTypeSynonymInstances
TemplateHaskell | Enable Template Haskell, a system for compile-time metaprogramming. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XTemplateHaskell
ForeignFunctionInterface | Enable the Foreign Function Interface. In GHC, implements the standard Haskell 98 Foreign Function Interface Addendum, plus some GHC-specific extensions. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#language-pragma
Arrows | Enable arrow notation. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XArrows
Generics | (deprecated) Enable generic type classes, with default instances defined in terms of the algebraic structure of a type. https://haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#generic-classes
ImplicitPrelude | Enable the implicit importing of the module Prelude. When disabled, when desugaring certain built-in syntax into ordinary identifiers, use whatever is in scope rather than the Prelude -- version. https://haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#rebindable-syntax-and-the-implicit-prelude-import
NamedFieldPuns | Enable syntax for implicitly binding local names corresponding to the field names of a record. Puns bind specific names, unlike `RecordWildCards`. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XNamedFieldPuns
PatternGuards | Enable a form of guard which matches a pattern and binds variables. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XPatternGuards
GeneralizedNewtypeDeriving | Allow a type declared with `newtype` to use `deriving` for any class with an instance for the underlying type. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XGeneralizedNewtypeDeriving
ExtensibleRecords | Enable the "Trex" extensible records system. http://haskell.org/hugs/pages/users_guide/hugs-only.html#TREX
RestrictedTypeSynonyms | Enable type synonyms which are transparent in some definitions and opaque elsewhere, as a way of implementing abstract datatypes. http://haskell.org/hugs/pages/users_guide/restricted-synonyms.html
HereDocuments | Enable an alternate syntax for string literals, with string templating. http://haskell.org/hugs/pages/users_guide/here-documents.html
MagicHash | Allow the character `#` as a postfix modifier on identifiers. Also enables literal syntax for unboxed values. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XMagicHash
TypeFamilies | Allow data types and type synonyms which are indexed by types, i.e. ad-hoc polymorphism for types. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XTypeFamilies
StandaloneDeriving | Allow a standalone declaration which invokes the type class `deriving` mechanism. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XStandaloneDeriving
UnicodeSyntax | Allow certain Unicode characters to stand for certain ASCII character sequences, e.g. keywords and punctuation. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XUnicodeSyntax
UnliftedFFITypes | Allow the use of unboxed types as foreign types, e.g. in `foreign import` and `foreign export`. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#language-options
InterruptibleFFI | Enable interruptible FFI. https://haskell.org/ghc/docs/latest/html/users_guide/ffi-chap.html#interruptible-foreign-calls
CApiFFI | Allow use of CAPI FFI calling convention (`foreign import capi`). https://haskell.org/ghc/docs/latest/html/users_guide/ffi-chap.html#the-capi-calling-convention
LiberalTypeSynonyms | Defer validity checking of types until after expanding type synonyms, relaxing the constraints on how synonyms may be used. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XLiberalTypeSynonyms
TypeOperators | Allow the name of a type constructor, type class, or type variable to be an infix operator. * https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XTypeOperators
RecordWildCards | Enable syntax for implicitly binding local names corresponding to the field names of a record. A wildcard binds all unmentioned names, unlike `NamedFieldPuns`. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XRecordWildCards
RecordPuns | Deprecated, use `NamedFieldPuns` instead.
DisambiguateRecordFields | Allow a record field name to be disambiguated by the type of the record it's in. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XDisambiguateRecordFields
TraditionalRecordSyntax | Enable traditional record syntax (as supported by Haskell 98) https://haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#traditional-record-syntax
OverloadedStrings | Enable overloading of string literals using a type class, much like integer literals. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XOverloadedStrings
GADTs | Enable generalized algebraic data types, in which type variables may be instantiated on a per-constructor basis. Implies `GADTSyntax`. https://haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#generalised-algebraic-data-types-gadts
GADTSyntax | Enable GADT syntax for declaring ordinary algebraic datatypes. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XGADTSyntax
MonoPatBinds | (deprecated) Has no effect. Old description: Make pattern bindings monomorphic. https://downloads.haskell.org/~ghc/7.6.3/docs/html/users_guide/monomorphism.html
RelaxedPolyRec | Relax the requirements on mutually-recursive polymorphic functions. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XRelaxedPolyRec
ExtendedDefaultRules | Allow default instantiation of polymorphic types in more situations. http://downloads.haskell.org/~ghc/latest/docs/html/users_guide/ghci.html#type-defaulting-in-ghci
UnboxedTuples | Enable unboxed tuples. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XUnboxedTuples
DeriveDataTypeable | Enable `deriving` for classes `Typeable` and `Data`. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XDeriveDataTypeable
DeriveGeneric | Enable `deriving` for `Generic` and `Generic1`. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XDeriveGeneric
DefaultSignatures | Enable support for default signatures. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XDefaultSignatures
InstanceSigs | Allow type signatures to be specified in instance declarations. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XInstanceSigs
ConstrainedClassMethods | Allow a class method's type to place additional constraints on a class type variable. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XConstrainedClassMethods
PackageImports | Allow imports to be qualified by the package name the module is intended to be imported from, e.g.
    import "network" Network.Socket
https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XPackageImports
ImpredicativeTypes | (deprecated) Allow a type variable to be instantiated at a polymorphic type. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XImpredicativeTypes
NewQualifiedOperators | (deprecated) Change the syntax for qualified infix operators. http://www.haskell.org/ghc/docs/6.12.3/html/users_guide/syntax-extns.html#new-qualified-operators
PostfixOperators | Relax the interpretation of left operator sections to allow unary postfix operators. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XPostfixOperators
QuasiQuotes | Enable quasi-quotation, a mechanism for defining new concrete syntax for expressions and patterns. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XQuasiQuotes
TransformListComp | Enable generalized list comprehensions, supporting operations such as sorting and grouping. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XTransformListComp
MonadComprehensions | Enable monad comprehensions, which generalise the list comprehension syntax to work for any monad. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XMonadComprehensions
ViewPatterns | Enable view patterns, which match a value by applying a function and matching on the result. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XViewPatterns
XmlSyntax | Allow concrete XML syntax to be used in expressions and patterns, as per the Haskell Server Pages extension language: http://www.haskell.org/haskellwiki/HSP. The ideas behind it are discussed in the paper "Haskell Server Pages through Dynamic Loading" by Niklas Broberg, from Haskell Workshop '05.
RegularPatterns | Allow regular pattern matching over lists, as discussed in the paper "Regular Expression Patterns" by Niklas Broberg, Andreas Farre and Josef Svenningsson, from ICFP '04.
TupleSections | Enable the use of tuple sections, e.g. `(, True)` desugars into `x -> (x, True)`. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XTupleSections
GHCForeignImportPrim | Allow GHC primops, written in C--, to be imported into a Haskell file.
NPlusKPatterns | Support for patterns of the form `n + k`, where `k` is an integer literal. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XNPlusKPatterns
DoAndIfThenElse | Improve the layout rule when `if` expressions are used in a `do` block.
MultiWayIf | Enable support for multi-way `if`-expressions. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XMultiWayIf
LambdaCase | Enable support lambda-`case` expressions. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XLambdaCase
RebindableSyntax | Makes much of the Haskell sugar be desugared into calls to the function with a particular name that is in scope. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XRebindableSyntax
ExplicitForAll | Make `forall` a keyword in types, which can be used to give the generalisation explicitly. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XExplicitForAll
DatatypeContexts | Allow contexts to be put on datatypes, e.g. the `Eq a` in `data Eq a => Set a = NilSet | ConsSet a (Set a)`. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XDatatypeContexts
MonoLocalBinds | Local (`let` and `where`) bindings are monomorphic. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XMonoLocalBinds
DeriveFunctor | Enable `deriving` for the `Functor` class. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XDeriveFunctor
DeriveTraversable | Enable `deriving` for the `Traversable` class. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XDeriveTraversable
DeriveFoldable | Enable `deriving` for the `Foldable` class. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XDeriveFoldable
NondecreasingIndentation | Enable non-decreasing indentation for `do` blocks. https://haskell.org/ghc/docs/latest/html/users_guide/bugs.html#context-free-syntax
SafeImports | Allow imports to be qualified with a safe keyword that requires the imported module be trusted as according to the Safe Haskell definition of trust.
    import safe Network.Socket
https://haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#safe-imports
Safe | Compile a module in the Safe, Safe Haskell mode -- a restricted form of the Haskell language to ensure type safety. https://www.haskell.org/ghc/docs/latest/html/users_guide/safe_haskell.html#ghc-flag--XSafe
Trustworthy | Compile a module in the Trustworthy, Safe Haskell mode -- no restrictions apply but the module is marked as trusted as long as the package the module resides in is trusted. https://www.haskell.org/ghc/docs/latest/html/users_guide/safe_haskell.html#ghc-flag--XTrustworthy
Unsafe | Compile a module in the Unsafe, Safe Haskell mode so that modules compiled using Safe, Safe Haskell mode can't import it. https://www.haskell.org/ghc/docs/latest/html/users_guide/safe_haskell.html#ghc-flag--XUnsafe
ConstraintKinds | Allow type classimplicit parameterequality constraints to be used as types with the special kind constraint. Also generalise the `(ctxt => ty)` syntax so that any type of kind constraint can occur before the arrow. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XConstraintKinds
PolyKinds | Enable kind polymorphism. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XPolyKinds
DataKinds | Enable datatype promotion. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XDataKinds
ParallelArrays | Enable parallel arrays syntax (`[:`, `:]`) for Data Parallel Haskell. http://www.haskell.org/haskellwiki/GHC/Data_Parallel_Haskell
RoleAnnotations | Enable explicit role annotations, like in (`type role Foo representational representational`). https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XRoleAnnotations
OverloadedLists | Enable overloading of list literals, arithmetic sequences and list patterns using the `IsList` type class. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XOverloadedLists
EmptyCase | Enable case expressions that have no alternatives. Also applies to lambda-case expressions if they are enabled. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XEmptyCase
AutoDeriveTypeable | (deprecated) Deprecated in favour of `DeriveDataTypeable`. Old description: Triggers the generation of derived `Typeable` instances for every datatype and type class declaration. https://haskell.org/ghc/docs/7.8.4/html/users_guide/deriving.html#auto-derive-typeable
NegativeLiterals | Desugars negative literals directly (without using negate). https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XNegativeLiterals
BinaryLiterals | Allow the use of binary integer literal syntax (e.g. `0b11001001` to denote `201`). https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XBinaryLiterals
NumDecimals | Allow the use of floating literal syntax for all instances of `Num`, including `Int` and `Integer`. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XNumDecimals
NullaryTypeClasses | Enable support for type classes with no type parameter. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XNullaryTypeClasses
ExplicitNamespaces | Enable explicit namespaces in module import/export lists. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XExplicitNamespaces
AllowAmbiguousTypes | Allow the user to write ambiguous types, and the type inference engine to infer them. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XAllowAmbiguousTypes
JavaScriptFFI | Enable `foreign import javascript`.
PatternSynonyms | Allow giving names to and abstracting over patterns. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XPatternSynonyms
PartialTypeSignatures | Allow anonymous placeholders (underscore) inside type signatures. The type inference engine will generate a message describing the type inferred at the hole's location. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XPartialTypeSignatures
NamedWildCards | Allow named placeholders written with a leading underscore inside type signatures. Wildcards with the same name unify to the same type. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XNamedWildCards
DeriveAnyClass | Enable `deriving` for any class. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XDeriveAnyClass
DeriveLift | Enable `deriving` for the `Lift` class. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XDeriveLift
StaticPointers | Enable support for 'static pointers' (and the `static` keyword) to refer to globally stable names, even across different programs. https://www.haskell.org/ghc/docs/latest/html/users_guide/glasgow_exts.html#ghc-flag--XStaticPointers
StrictData | Switches data type declarations to be strict by default (as if they had a bang using `BangPatterns`), and allow opt-in field laziness using `~`. https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/glasgow_exts.html#ghc-flag--XStrictData
Strict | Switches all pattern bindings to be strict by default (as if they had a bang using `BangPatterns`), ordinary patterns are recovered using `~`. Implies `StrictData`. https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/glasgow_exts.html#ghc-flag--XStrict
ApplicativeDo | Allows `do`-notation for types that are ``Applicative`` as well as ``Monad``. When enabled, desugaring `do` notation tries to use `(*)` and ``fmap`` and ``join`` as far as possible.
DuplicateRecordFields | Allow records to use duplicated field labels for accessors.
TypeApplications | Enable explicit type applications with the syntax `id @Int`.
TypeInType | Dissolve the distinction between types and kinds, allowing the compiler to reason about kind equality and therefore enabling GADTs to be promoted to the type-level.
UndecidableSuperClasses | Allow recursive (and therefore undecideable) super-class relationships.
MonadFailDesugaring | A temporary extension to help library authors check if their code will compile with the new planned desugaring of fail.
TemplateHaskellQuotes | A subset of `TemplateHaskell` including only quoting.
OverloadedLabels | Allows use of the `#label` syntax.
TypeFamilyDependencies | Allow functional dependency annotations on type families to declare them as injective.
DerivingStrategies | Allow multiple `deriving` clauses, each optionally qualified with a strategy.
UnboxedSums | Enable the use of unboxed sum syntax.
HexFloatLiterals | Allow use of hexadecimal literal notation for floating-point values.
BlockArguments | Allow `do` blocks etc. in argument position.
NumericUnderscores | Allow use of underscores in numeric literals.
QuantifiedConstraints | Allow `forall` in constraints.
StarIsType | Have `*` refer to `Type`.

Instances

Bounded KnownExtension # |
Instance details Defined in Language.Haskell.Extension Methods minBound :: KnownExtension Source # maxBound :: KnownExtension Source #
Enum KnownExtension # |
Instance details Defined in Language.Haskell.Extension Methods succ :: KnownExtension -> KnownExtension Source # pred :: KnownExtension -> KnownExtension Source # toEnum :: Int -> KnownExtension Source # fromEnum :: KnownExtension -> Int Source # enumFrom :: KnownExtension -> [KnownExtension] Source # enumFromThen :: KnownExtension -> KnownExtension -> [KnownExtension] Source # enumFromTo :: KnownExtension -> KnownExtension -> [KnownExtension] Source # enumFromThenTo :: KnownExtension -> KnownExtension -> KnownExtension -> [KnownExtension] Source #
Eq KnownExtension # |
Instance details Defined in Language.Haskell.Extension Methods (==) :: KnownExtension -> KnownExtension -> Bool # (/=) :: KnownExtension -> KnownExtension -> Bool #
Data KnownExtension # |
Instance details Defined in Language.Haskell.Extension Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> KnownExtension -> c KnownExtension Source # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c KnownExtension Source # toConstr :: KnownExtension -> Constr Source # dataTypeOf :: KnownExtension -> DataType Source # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c KnownExtension) Source # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c KnownExtension) Source # gmapT :: (forall b. Data b => b -> b) -> KnownExtension -> KnownExtension Source # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> KnownExtension -> r Source # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> KnownExtension -> r Source # gmapQ :: (forall d. Data d => d -> u) -> KnownExtension -> [u] Source # gmapQi :: Int -> (forall d. Data d => d -> u) -> KnownExtension -> u Source # gmapM :: Monad m => (forall d. Data d => d -> m d) -> KnownExtension -> m KnownExtension Source # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> KnownExtension -> m KnownExtension Source # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> KnownExtension -> m KnownExtension Source #
Ord KnownExtension # |
Instance details Defined in Language.Haskell.Extension Methods compare :: KnownExtension -> KnownExtension -> Ordering # (<) :: KnownExtension -> KnownExtension -> Bool # (<=) :: KnownExtension -> KnownExtension -> Bool # (>) :: KnownExtension -> KnownExtension -> Bool # (>=) :: KnownExtension -> KnownExtension -> Bool # max :: KnownExtension -> KnownExtension -> KnownExtension # min :: KnownExtension -> KnownExtension -> KnownExtension #
Read KnownExtension # |
Instance details Defined in Language.Haskell.Extension Methods readsPrec :: Int -> ReadS KnownExtension Source # readList :: ReadS [KnownExtension] Source # readPrec :: ReadPrec KnownExtension Source # readListPrec :: ReadPrec [KnownExtension] Source #
Show KnownExtension # |
Instance details Defined in Language.Haskell.Extension Methods showsPrec :: Int -> KnownExtension -> ShowS Source # show :: KnownExtension -> String Source # showList :: [KnownExtension] -> ShowS Source #
Generic KnownExtension # |
Instance details Defined in Language.Haskell.Extension Associated Types type Rep KnownExtension :: Type -> Type Source # Methods from :: KnownExtension -> Rep KnownExtension x Source # to :: Rep KnownExtension x -> KnownExtension Source #
Binary KnownExtension # |
Instance details Defined in Language.Haskell.Extension Methods put :: KnownExtension -> Put Source # get :: Get KnownExtension Source # putList :: [KnownExtension] -> Put Source #
NFData KnownExtension # |
Instance details Defined in Language.Haskell.Extension Methods rnf :: KnownExtension -> () Source #
Pretty KnownExtension # |
Instance details Defined in Language.Haskell.Extension Methods pretty :: KnownExtension -> Doc #
Text KnownExtension # |
Instance details Defined in Language.Haskell.Extension Methods disp :: KnownExtension -> Doc # parse :: ReadP r KnownExtension #
type Rep KnownExtension # |
Instance details Defined in Language.Haskell.Extension type Rep KnownExtension = D1 (MetaData "KnownExtension" "Language.Haskell.Extension" "Cabal-2.4.0.1" False) ((((((C1 (MetaCons "OverlappingInstances" PrefixI False) (U1 :: Type -> Type) :+: (C1 (MetaCons "UndecidableInstances" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "IncoherentInstances" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "DoRec" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "RecursiveDo" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "ParallelListComp" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "MultiParamTypeClasses" PrefixI False) (U1 :: Type -> Type)))) :+: (((C1 (MetaCons "MonomorphismRestriction" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "FunctionalDependencies" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "Rank2Types" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "RankNTypes" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "PolymorphicComponents" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "ExistentialQuantification" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "ScopedTypeVariables" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "PatternSignatures" PrefixI False) (U1 :: Type -> Type))))) :+: ((((C1 (MetaCons "ImplicitParams" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "FlexibleContexts" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "FlexibleInstances" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "EmptyDataDecls" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "CPP" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "KindSignatures" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "BangPatterns" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "TypeSynonymInstances" PrefixI False) (U1 :: Type -> Type)))) :+: (((C1 (MetaCons "TemplateHaskell" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "ForeignFunctionInterface" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "Arrows" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "Generics" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "ImplicitPrelude" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "NamedFieldPuns" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "PatternGuards" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "GeneralizedNewtypeDeriving" PrefixI False) (U1 :: Type -> Type)))))) :+: (((((C1 (MetaCons "ExtensibleRecords" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "RestrictedTypeSynonyms" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "HereDocuments" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "MagicHash" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "TypeFamilies" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "StandaloneDeriving" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "UnicodeSyntax" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "UnliftedFFITypes" PrefixI False) (U1 :: Type -> Type)))) :+: (((C1 (MetaCons "InterruptibleFFI" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "CApiFFI" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "LiberalTypeSynonyms" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "TypeOperators" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "RecordWildCards" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "RecordPuns" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "DisambiguateRecordFields" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "TraditionalRecordSyntax" PrefixI False) (U1 :: Type -> Type))))) :+: ((((C1 (MetaCons "OverloadedStrings" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "GADTs" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "GADTSyntax" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "MonoPatBinds" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "RelaxedPolyRec" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "ExtendedDefaultRules" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "UnboxedTuples" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "DeriveDataTypeable" PrefixI False) (U1 :: Type -> Type)))) :+: (((C1 (MetaCons "DeriveGeneric" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "DefaultSignatures" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "InstanceSigs" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "ConstrainedClassMethods" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "PackageImports" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "ImpredicativeTypes" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "NewQualifiedOperators" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "PostfixOperators" PrefixI False) (U1 :: Type -> Type))))))) :+: (((((C1 (MetaCons "QuasiQuotes" PrefixI False) (U1 :: Type -> Type) :+: (C1 (MetaCons "TransformListComp" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "MonadComprehensions" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "ViewPatterns" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "XmlSyntax" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "RegularPatterns" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "TupleSections" PrefixI False) (U1 :: Type -> Type)))) :+: (((C1 (MetaCons "GHCForeignImportPrim" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "NPlusKPatterns" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "DoAndIfThenElse" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "MultiWayIf" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "LambdaCase" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "RebindableSyntax" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "ExplicitForAll" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "DatatypeContexts" PrefixI False) (U1 :: Type -> Type))))) :+: ((((C1 (MetaCons "MonoLocalBinds" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "DeriveFunctor" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "DeriveTraversable" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "DeriveFoldable" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "NondecreasingIndentation" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "SafeImports" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "Safe" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "Trustworthy" PrefixI False) (U1 :: Type -> Type)))) :+: (((C1 (MetaCons "Unsafe" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "ConstraintKinds" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "PolyKinds" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "DataKinds" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "ParallelArrays" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "RoleAnnotations" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "OverloadedLists" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "EmptyCase" PrefixI False) (U1 :: Type -> Type)))))) :+: (((((C1 (MetaCons "AutoDeriveTypeable" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "NegativeLiterals" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "BinaryLiterals" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "NumDecimals" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "NullaryTypeClasses" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "ExplicitNamespaces" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "AllowAmbiguousTypes" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "JavaScriptFFI" PrefixI False) (U1 :: Type -> Type)))) :+: (((C1 (MetaCons "PatternSynonyms" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "PartialTypeSignatures" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "NamedWildCards" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "DeriveAnyClass" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "DeriveLift" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "StaticPointers" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "StrictData" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "Strict" PrefixI False) (U1 :: Type -> Type))))) :+: ((((C1 (MetaCons "ApplicativeDo" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "DuplicateRecordFields" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "TypeApplications" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "TypeInType" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "UndecidableSuperClasses" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "MonadFailDesugaring" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "TemplateHaskellQuotes" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "OverloadedLabels" PrefixI False) (U1 :: Type -> Type)))) :+: (((C1 (MetaCons "TypeFamilyDependencies" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "DerivingStrategies" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "UnboxedSums" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "HexFloatLiterals" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "BlockArguments" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "NumericUnderscores" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "QuantifiedConstraints" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "StarIsType" PrefixI False) (U1 :: Type -> Type))))))))

knownExtensions :: [KnownExtension] #

Deprecated: KnownExtension is an instance of Enum and Bounded, use those instead. This symbol will be removed in Cabal-3.0 (est. Oct 2018).

deprecatedExtensions :: [(Extension, Maybe Extension)] #

Extensions that have been deprecated, possibly paired with another extension that replaces it.

classifyExtension :: String -> Extension #