Safe Haskell	None
Language	Haskell2010

Distribution.Compat.Semigroup

Description

Compatibility layer for Data.Semigroup

Synopsis

class Semigroup a where
- (<>) :: a -> a -> a
class Semigroup a => Monoid a where
- mempty :: a
- mappend :: a -> a -> a
- mconcat :: [a] -> a
newtype All = All {
- getAll :: Bool
}
newtype Any = Any {
- getAny :: Bool
}
newtype First' a = First' {
- getFirst' :: a
}
newtype Last' a = Last' {
- getLast' :: a
}
newtype Option' a = Option' {
- getOption' :: Maybe a
}
gmappend :: (Generic a, GSemigroup (Rep a)) => a -> a -> a
gmempty :: (Generic a, GMonoid (Rep a)) => a

Documentation

class Semigroup a where #

The class of semigroups (types with an associative binary operation).

Instances should satisfy the following:

Associativity: x <> (y <> z) = (x <> y) <> z

You can alternatively define sconcat instead of (<>), in which case the laws are:

Unit: sconcat (pure x) = x
Multiplication: sconcat (join xss) = sconcat (fmap sconcat xss)

Since: base-4.9.0.0

Minimal complete definition

(<>) | sconcat

Methods

(<>) :: a -> a -> a infixr 6 #

An associative operation.

Examples

Expand

>>> [1,2,3] <> [4,5,6]
[1,2,3,4,5,6]

>>> Just [1, 2, 3] <> Just [4, 5, 6]
Just [1,2,3,4,5,6]

>>> putStr "Hello, " <> putStrLn "World!"
Hello, World!

Instances

Instances details

Semigroup Benchmark Source #
Instance details Defined in Distribution.Types.Benchmark Methods (<>) :: Benchmark -> Benchmark -> Benchmark # sconcat :: NonEmpty Benchmark -> Benchmark # stimes :: Integral b => b -> Benchmark -> Benchmark #
Semigroup BenchmarkInterface Source #
Instance details Defined in Distribution.Types.BenchmarkInterface Methods (<>) :: BenchmarkInterface -> BenchmarkInterface -> BenchmarkInterface # sconcat :: NonEmpty BenchmarkInterface -> BenchmarkInterface # stimes :: Integral b => b -> BenchmarkInterface -> BenchmarkInterface #
Semigroup BuildInfo Source #
Instance details Defined in Distribution.Types.BuildInfo Methods (<>) :: BuildInfo -> BuildInfo -> BuildInfo # sconcat :: NonEmpty BuildInfo -> BuildInfo # stimes :: Integral b => b -> BuildInfo -> BuildInfo #
Semigroup Component Source #
Instance details Defined in Distribution.Types.Component Methods (<>) :: Component -> Component -> Component # sconcat :: NonEmpty Component -> Component # stimes :: Integral b => b -> Component -> Component #
Semigroup DependencyMap Source #
Instance details Defined in Distribution.Types.DependencyMap Methods (<>) :: DependencyMap -> DependencyMap -> DependencyMap # sconcat :: NonEmpty DependencyMap -> DependencyMap # stimes :: Integral b => b -> DependencyMap -> DependencyMap #
Semigroup Executable Source #
Instance details Defined in Distribution.Types.Executable Methods (<>) :: Executable -> Executable -> Executable # sconcat :: NonEmpty Executable -> Executable # stimes :: Integral b => b -> Executable -> Executable #
Semigroup ExecutableScope Source #	`Any` like semigroup, where `ExecutablePrivate` is 'Any True'
Instance details Defined in Distribution.Types.ExecutableScope Methods (<>) :: ExecutableScope -> ExecutableScope -> ExecutableScope # sconcat :: NonEmpty ExecutableScope -> ExecutableScope # stimes :: Integral b => b -> ExecutableScope -> ExecutableScope #
Semigroup FlagAssignment Source #
Instance details Defined in Distribution.Types.Flag Methods (<>) :: FlagAssignment -> FlagAssignment -> FlagAssignment # sconcat :: NonEmpty FlagAssignment -> FlagAssignment # stimes :: Integral b => b -> FlagAssignment -> FlagAssignment #
Semigroup ForeignLib Source #
Instance details Defined in Distribution.Types.ForeignLib Methods (<>) :: ForeignLib -> ForeignLib -> ForeignLib # sconcat :: NonEmpty ForeignLib -> ForeignLib # stimes :: Integral b => b -> ForeignLib -> ForeignLib #
Semigroup ForeignLibType Source #
Instance details Defined in Distribution.Types.ForeignLibType Methods (<>) :: ForeignLibType -> ForeignLibType -> ForeignLibType # sconcat :: NonEmpty ForeignLibType -> ForeignLibType # stimes :: Integral b => b -> ForeignLibType -> ForeignLibType #
Semigroup Library Source #
Instance details Defined in Distribution.Types.Library Methods (<>) :: Library -> Library -> Library # sconcat :: NonEmpty Library -> Library # stimes :: Integral b => b -> Library -> Library #
Semigroup LibraryVisibility Source #
Instance details Defined in Distribution.Types.LibraryVisibility Methods (<>) :: LibraryVisibility -> LibraryVisibility -> LibraryVisibility # sconcat :: NonEmpty LibraryVisibility -> LibraryVisibility # stimes :: Integral b => b -> LibraryVisibility -> LibraryVisibility #
Semigroup SetupBuildInfo Source #
Instance details Defined in Distribution.Types.SetupBuildInfo Methods (<>) :: SetupBuildInfo -> SetupBuildInfo -> SetupBuildInfo # sconcat :: NonEmpty SetupBuildInfo -> SetupBuildInfo # stimes :: Integral b => b -> SetupBuildInfo -> SetupBuildInfo #
Semigroup TestSuite Source #
Instance details Defined in Distribution.Types.TestSuite Methods (<>) :: TestSuite -> TestSuite -> TestSuite # sconcat :: NonEmpty TestSuite -> TestSuite # stimes :: Integral b => b -> TestSuite -> TestSuite #
Semigroup TestSuiteInterface Source #
Instance details Defined in Distribution.Types.TestSuiteInterface Methods (<>) :: TestSuiteInterface -> TestSuiteInterface -> TestSuiteInterface # sconcat :: NonEmpty TestSuiteInterface -> TestSuiteInterface # stimes :: Integral b => b -> TestSuiteInterface -> TestSuiteInterface #
Semigroup UnqualComponentName Source #
Instance details Defined in Distribution.Types.UnqualComponentName Methods (<>) :: UnqualComponentName -> UnqualComponentName -> UnqualComponentName # sconcat :: NonEmpty UnqualComponentName -> UnqualComponentName # stimes :: Integral b => b -> UnqualComponentName -> UnqualComponentName #
Semigroup ShortText Source #
Instance details Defined in Distribution.Utils.ShortText Methods (<>) :: ShortText -> ShortText -> ShortText # sconcat :: NonEmpty ShortText -> ShortText # stimes :: Integral b => b -> ShortText -> ShortText #
Semigroup ByteArray	Since: base-4.17.0.0
Instance details Defined in Data.Array.Byte Methods (<>) :: ByteArray -> ByteArray -> ByteArray # sconcat :: NonEmpty ByteArray -> ByteArray # stimes :: Integral b => b -> ByteArray -> ByteArray #
Semigroup Builder
Instance details Defined in Data.ByteString.Builder.Internal Methods (<>) :: Builder -> Builder -> Builder # sconcat :: NonEmpty Builder -> Builder # stimes :: Integral b => b -> Builder -> Builder #
Semigroup ByteString
Instance details Defined in Data.ByteString.Internal.Type Methods (<>) :: ByteString -> ByteString -> ByteString # sconcat :: NonEmpty ByteString -> ByteString # stimes :: Integral b => b -> ByteString -> ByteString #
Semigroup ByteString
Instance details Defined in Data.ByteString.Lazy.Internal Methods (<>) :: ByteString -> ByteString -> ByteString # sconcat :: NonEmpty ByteString -> ByteString # stimes :: Integral b => b -> ByteString -> ByteString #
Semigroup ShortByteString
Instance details Defined in Data.ByteString.Short.Internal Methods (<>) :: ShortByteString -> ShortByteString -> ShortByteString # sconcat :: NonEmpty ShortByteString -> ShortByteString # stimes :: Integral b => b -> ShortByteString -> ShortByteString #
Semigroup IntSet	Since: containers-0.5.7
Instance details Defined in Data.IntSet.Internal Methods (<>) :: IntSet -> IntSet -> IntSet # sconcat :: NonEmpty IntSet -> IntSet # stimes :: Integral b => b -> IntSet -> IntSet #
Semigroup Void	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Base Methods (<>) :: Void -> Void -> Void # sconcat :: NonEmpty Void -> Void # stimes :: Integral b => b -> Void -> Void #
Semigroup All	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Data.Semigroup.Internal Methods (<>) :: All -> All -> All # sconcat :: NonEmpty All -> All # stimes :: Integral b => b -> All -> All #
Semigroup Any	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Data.Semigroup.Internal Methods (<>) :: Any -> Any -> Any # sconcat :: NonEmpty Any -> Any # stimes :: Integral b => b -> Any -> Any #
Semigroup Ordering	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Base Methods (<>) :: Ordering -> Ordering -> Ordering # sconcat :: NonEmpty Ordering -> Ordering # stimes :: Integral b => b -> Ordering -> Ordering #
Semigroup OsString
Instance details Defined in System.OsString.Internal.Types Methods (<>) :: OsString -> OsString -> OsString # sconcat :: NonEmpty OsString -> OsString # stimes :: Integral b => b -> OsString -> OsString #
Semigroup PosixString
Instance details Defined in System.OsString.Internal.Types Methods (<>) :: PosixString -> PosixString -> PosixString # sconcat :: NonEmpty PosixString -> PosixString # stimes :: Integral b => b -> PosixString -> PosixString #
Semigroup WindowsString
Instance details Defined in System.OsString.Internal.Types Methods (<>) :: WindowsString -> WindowsString -> WindowsString # sconcat :: NonEmpty WindowsString -> WindowsString # stimes :: Integral b => b -> WindowsString -> WindowsString #
Semigroup Doc
Instance details Defined in Text.PrettyPrint.HughesPJ Methods (<>) :: Doc -> Doc -> Doc # sconcat :: NonEmpty Doc -> Doc # stimes :: Integral b => b -> Doc -> Doc #
Semigroup Builder
Instance details Defined in Data.Text.Internal.Builder Methods (<>) :: Builder -> Builder -> Builder # sconcat :: NonEmpty Builder -> Builder # stimes :: Integral b => b -> Builder -> Builder #
Semigroup StrictTextBuilder	Concatenation of `StrictBuilder` is right-biased: the right builder will be run first. This allows a builder to run tail-recursively when it was accumulated left-to-right.
Instance details Defined in Data.Text.Internal.StrictBuilder Methods (<>) :: StrictTextBuilder -> StrictTextBuilder -> StrictTextBuilder # sconcat :: NonEmpty StrictTextBuilder -> StrictTextBuilder # stimes :: Integral b => b -> StrictTextBuilder -> StrictTextBuilder #
Semigroup ()	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Base Methods (<>) :: () -> () -> () # sconcat :: NonEmpty () -> () # stimes :: Integral b => b -> () -> () #
Semigroup (DList a) Source #
Instance details Defined in Distribution.Compat.DList Methods (<>) :: DList a -> DList a -> DList a # sconcat :: NonEmpty (DList a) -> DList a # stimes :: Integral b => b -> DList a -> DList a #
Ord a => Semigroup (NonEmptySet a) Source #	Note: there aren't `Monoid` instance.
Instance details Defined in Distribution.Compat.NonEmptySet Methods (<>) :: NonEmptySet a -> NonEmptySet a -> NonEmptySet a # sconcat :: NonEmpty (NonEmptySet a) -> NonEmptySet a # stimes :: Integral b => b -> NonEmptySet a -> NonEmptySet a #
Semigroup (First' a) Source #
Instance details Defined in Distribution.Compat.Semigroup Methods (<>) :: First' a -> First' a -> First' a # sconcat :: NonEmpty (First' a) -> First' a # stimes :: Integral b => b -> First' a -> First' a #
Semigroup (Last' a) Source #
Instance details Defined in Distribution.Compat.Semigroup Methods (<>) :: Last' a -> Last' a -> Last' a # sconcat :: NonEmpty (Last' a) -> Last' a # stimes :: Integral b => b -> Last' a -> Last' a #
Semigroup a => Semigroup (Option' a) Source #
Instance details Defined in Distribution.Compat.Semigroup Methods (<>) :: Option' a -> Option' a -> Option' a # sconcat :: NonEmpty (Option' a) -> Option' a # stimes :: Integral b => b -> Option' a -> Option' a #
Semigroup a => Semigroup (PerCompilerFlavor a) Source #
Instance details Defined in Distribution.Compiler Methods (<>) :: PerCompilerFlavor a -> PerCompilerFlavor a -> PerCompilerFlavor a # sconcat :: NonEmpty (PerCompilerFlavor a) -> PerCompilerFlavor a # stimes :: Integral b => b -> PerCompilerFlavor a -> PerCompilerFlavor a #
Semigroup (Condition a) Source #
Instance details Defined in Distribution.Types.Condition Methods (<>) :: Condition a -> Condition a -> Condition a # sconcat :: NonEmpty (Condition a) -> Condition a # stimes :: Integral b => b -> Condition a -> Condition a #
Semigroup (FromMaybe b)
Instance details Defined in Data.Foldable1 Methods (<>) :: FromMaybe b -> FromMaybe b -> FromMaybe b # sconcat :: NonEmpty (FromMaybe b) -> FromMaybe b # stimes :: Integral b0 => b0 -> FromMaybe b -> FromMaybe b #
Semigroup a => Semigroup (JoinWith a)
Instance details Defined in Data.Foldable1 Methods (<>) :: JoinWith a -> JoinWith a -> JoinWith a # sconcat :: NonEmpty (JoinWith a) -> JoinWith a # stimes :: Integral b => b -> JoinWith a -> JoinWith a #
Semigroup (NonEmptyDList a)
Instance details Defined in Data.Foldable1 Methods (<>) :: NonEmptyDList a -> NonEmptyDList a -> NonEmptyDList a # sconcat :: NonEmpty (NonEmptyDList a) -> NonEmptyDList a # stimes :: Integral b => b -> NonEmptyDList a -> NonEmptyDList a #
Semigroup (Comparison a)	`(<>)` on comparisons combines results with `(<>) @Ordering`. Without newtypes this equals `liftA2 (liftA2 (<>))`. (<>) :: Comparison a -> Comparison a -> Comparison a Comparison cmp <> Comparison cmp' = Comparison a a' -> cmp a a' <> cmp a a'
Instance details Defined in Data.Functor.Contravariant Methods (<>) :: Comparison a -> Comparison a -> Comparison a # sconcat :: NonEmpty (Comparison a) -> Comparison a # stimes :: Integral b => b -> Comparison a -> Comparison a #
Semigroup (Equivalence a)	`(<>)` on equivalences uses logical conjunction `(&&)` on the results. Without newtypes this equals `liftA2 (liftA2 (&&))`. (<>) :: Equivalence a -> Equivalence a -> Equivalence a Equivalence equiv <> Equivalence equiv' = Equivalence a b -> equiv a b && equiv' a b
Instance details Defined in Data.Functor.Contravariant Methods (<>) :: Equivalence a -> Equivalence a -> Equivalence a # sconcat :: NonEmpty (Equivalence a) -> Equivalence a # stimes :: Integral b => b -> Equivalence a -> Equivalence a #
Semigroup (Predicate a)	`(<>)` on predicates uses logical conjunction `(&&)` on the results. Without newtypes this equals `liftA2 (&&)`. (<>) :: Predicate a -> Predicate a -> Predicate a Predicate pred <> Predicate pred' = Predicate a -> pred a && pred' a
Instance details Defined in Data.Functor.Contravariant Methods (<>) :: Predicate a -> Predicate a -> Predicate a # sconcat :: NonEmpty (Predicate a) -> Predicate a # stimes :: Integral b => b -> Predicate a -> Predicate a #
Semigroup (First a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: First a -> First a -> First a # sconcat :: NonEmpty (First a) -> First a # stimes :: Integral b => b -> First a -> First a #
Semigroup (Last a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: Last a -> Last a -> Last a # sconcat :: NonEmpty (Last a) -> Last a # stimes :: Integral b => b -> Last a -> Last a #
Ord a => Semigroup (Max a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: Max a -> Max a -> Max a # sconcat :: NonEmpty (Max a) -> Max a # stimes :: Integral b => b -> Max a -> Max a #
Ord a => Semigroup (Min a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: Min a -> Min a -> Min a # sconcat :: NonEmpty (Min a) -> Min a # stimes :: Integral b => b -> Min a -> Min a #
Monoid m => Semigroup (WrappedMonoid m)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: WrappedMonoid m -> WrappedMonoid m -> WrappedMonoid m # sconcat :: NonEmpty (WrappedMonoid m) -> WrappedMonoid m # stimes :: Integral b => b -> WrappedMonoid m -> WrappedMonoid m #
Semigroup (PutM ())
Instance details Defined in Data.Binary.Put Methods (<>) :: PutM () -> PutM () -> PutM () # sconcat :: NonEmpty (PutM ()) -> PutM () # stimes :: Integral b => b -> PutM () -> PutM () #
Semigroup (IntMap a)	Since: containers-0.5.7
Instance details Defined in Data.IntMap.Internal Methods (<>) :: IntMap a -> IntMap a -> IntMap a # sconcat :: NonEmpty (IntMap a) -> IntMap a # stimes :: Integral b => b -> IntMap a -> IntMap a #
Semigroup (Seq a)	Since: containers-0.5.7
Instance details Defined in Data.Sequence.Internal Methods (<>) :: Seq a -> Seq a -> Seq a # sconcat :: NonEmpty (Seq a) -> Seq a # stimes :: Integral b => b -> Seq a -> Seq a #
Ord a => Semigroup (Intersection a)
Instance details Defined in Data.Set.Internal Methods (<>) :: Intersection a -> Intersection a -> Intersection a # sconcat :: NonEmpty (Intersection a) -> Intersection a # stimes :: Integral b => b -> Intersection a -> Intersection a #
Semigroup (MergeSet a)
Instance details Defined in Data.Set.Internal Methods (<>) :: MergeSet a -> MergeSet a -> MergeSet a # sconcat :: NonEmpty (MergeSet a) -> MergeSet a # stimes :: Integral b => b -> MergeSet a -> MergeSet a #
Ord a => Semigroup (Set a)	Since: containers-0.5.7
Instance details Defined in Data.Set.Internal Methods (<>) :: Set a -> Set a -> Set a # sconcat :: NonEmpty (Set a) -> Set a # stimes :: Integral b => b -> Set a -> Set a #
Semigroup (NonEmpty a)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Base Methods (<>) :: NonEmpty a -> NonEmpty a -> NonEmpty a # sconcat :: NonEmpty (NonEmpty a) -> NonEmpty a # stimes :: Integral b => b -> NonEmpty a -> NonEmpty a #
Semigroup a => Semigroup (Identity a)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Data.Functor.Identity Methods (<>) :: Identity a -> Identity a -> Identity a # sconcat :: NonEmpty (Identity a) -> Identity a # stimes :: Integral b => b -> Identity a -> Identity a #
Semigroup (First a)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Data.Monoid Methods (<>) :: First a -> First a -> First a # sconcat :: NonEmpty (First a) -> First a # stimes :: Integral b => b -> First a -> First a #
Semigroup (Last a)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Data.Monoid Methods (<>) :: Last a -> Last a -> Last a # sconcat :: NonEmpty (Last a) -> Last a # stimes :: Integral b => b -> Last a -> Last a #
Semigroup a => Semigroup (Down a)	Since: base-4.11.0.0
Instance details Defined in GHC.Internal.Data.Ord Methods (<>) :: Down a -> Down a -> Down a # sconcat :: NonEmpty (Down a) -> Down a # stimes :: Integral b => b -> Down a -> Down a #
Semigroup a => Semigroup (Dual a)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Data.Semigroup.Internal Methods (<>) :: Dual a -> Dual a -> Dual a # sconcat :: NonEmpty (Dual a) -> Dual a # stimes :: Integral b => b -> Dual a -> Dual a #
Semigroup (Endo a)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Data.Semigroup.Internal Methods (<>) :: Endo a -> Endo a -> Endo a # sconcat :: NonEmpty (Endo a) -> Endo a # stimes :: Integral b => b -> Endo a -> Endo a #
Num a => Semigroup (Product a)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Data.Semigroup.Internal Methods (<>) :: Product a -> Product a -> Product a # sconcat :: NonEmpty (Product a) -> Product a # stimes :: Integral b => b -> Product a -> Product a #
Num a => Semigroup (Sum a)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Data.Semigroup.Internal Methods (<>) :: Sum a -> Sum a -> Sum a # sconcat :: NonEmpty (Sum a) -> Sum a # stimes :: Integral b => b -> Sum a -> Sum a #
(Generic a, Semigroup (Rep a ())) => Semigroup (Generically a)	Since: base-4.17.0.0
Instance details Defined in GHC.Internal.Generics Methods (<>) :: Generically a -> Generically a -> Generically a # sconcat :: NonEmpty (Generically a) -> Generically a # stimes :: Integral b => b -> Generically a -> Generically a #
Semigroup p => Semigroup (Par1 p)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Generics Methods (<>) :: Par1 p -> Par1 p -> Par1 p # sconcat :: NonEmpty (Par1 p) -> Par1 p # stimes :: Integral b => b -> Par1 p -> Par1 p #
Semigroup a => Semigroup (IO a)	Since: base-4.10.0.0
Instance details Defined in GHC.Internal.Base Methods (<>) :: IO a -> IO a -> IO a # sconcat :: NonEmpty (IO a) -> IO a # stimes :: Integral b => b -> IO a -> IO a #
Semigroup (Doc a)
Instance details Defined in Text.PrettyPrint.Annotated.HughesPJ Methods (<>) :: Doc a -> Doc a -> Doc a # sconcat :: NonEmpty (Doc a) -> Doc a # stimes :: Integral b => b -> Doc a -> Doc a #
Semigroup a => Semigroup (Q a)	Since: template-haskell-2.17.0.0
Instance details Defined in Language.Haskell.TH.Syntax Methods (<>) :: Q a -> Q a -> Q a # sconcat :: NonEmpty (Q a) -> Q a # stimes :: Integral b => b -> Q a -> Q a #
Semigroup a => Semigroup (Maybe a)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Base Methods (<>) :: Maybe a -> Maybe a -> Maybe a # sconcat :: NonEmpty (Maybe a) -> Maybe a # stimes :: Integral b => b -> Maybe a -> Maybe a #
Semigroup a => Semigroup (Solo a)	Since: base-4.15
Instance details Defined in GHC.Internal.Base Methods (<>) :: Solo a -> Solo a -> Solo a # sconcat :: NonEmpty (Solo a) -> Solo a # stimes :: Integral b => b -> Solo a -> Solo a #
Semigroup [a]	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Base Methods (<>) :: [a] -> [a] -> [a] # sconcat :: NonEmpty [a] -> [a] # stimes :: Integral b => b -> [a] -> [a] #
Semigroup a => Semigroup (Op a b)	`(<>) @(Op a b)` without newtypes is `(<>) @(b->a)` = `liftA2 (<>)`. This lifts the `Semigroup` operation `(<>)` over the output of `a`. (<>) :: Op a b -> Op a b -> Op a b Op f <> Op g = Op a -> f a <> g a
Instance details Defined in Data.Functor.Contravariant Methods (<>) :: Op a b -> Op a b -> Op a b # sconcat :: NonEmpty (Op a b) -> Op a b # stimes :: Integral b0 => b0 -> Op a b -> Op a b #
Ord k => Semigroup (Map k v)
Instance details Defined in Data.Map.Internal Methods (<>) :: Map k v -> Map k v -> Map k v # sconcat :: NonEmpty (Map k v) -> Map k v # stimes :: Integral b => b -> Map k v -> Map k v #
Semigroup (Either a b)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Data.Either Methods (<>) :: Either a b -> Either a b -> Either a b # sconcat :: NonEmpty (Either a b) -> Either a b # stimes :: Integral b0 => b0 -> Either a b -> Either a b #
Semigroup (Proxy s)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Data.Proxy Methods (<>) :: Proxy s -> Proxy s -> Proxy s # sconcat :: NonEmpty (Proxy s) -> Proxy s # stimes :: Integral b => b -> Proxy s -> Proxy s #
Semigroup (U1 p)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Generics Methods (<>) :: U1 p -> U1 p -> U1 p # sconcat :: NonEmpty (U1 p) -> U1 p # stimes :: Integral b => b -> U1 p -> U1 p #
Semigroup (V1 p)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Generics Methods (<>) :: V1 p -> V1 p -> V1 p # sconcat :: NonEmpty (V1 p) -> V1 p # stimes :: Integral b => b -> V1 p -> V1 p #
(Semigroup a, Semigroup b) => Semigroup (a, b)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Base Methods (<>) :: (a, b) -> (a, b) -> (a, b) # sconcat :: NonEmpty (a, b) -> (a, b) # stimes :: Integral b0 => b0 -> (a, b) -> (a, b) #
Semigroup b => Semigroup (a -> b)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Base Methods (<>) :: (a -> b) -> (a -> b) -> a -> b # sconcat :: NonEmpty (a -> b) -> a -> b # stimes :: Integral b0 => b0 -> (a -> b) -> a -> b #
(Semigroup a, Semigroup c) => Semigroup (CondTree v c a) Source #
Instance details Defined in Distribution.Types.CondTree Methods (<>) :: CondTree v c a -> CondTree v c a -> CondTree v c a # sconcat :: NonEmpty (CondTree v c a) -> CondTree v c a # stimes :: Integral b => b -> CondTree v c a -> CondTree v c a #
Semigroup a => Semigroup (Const a b)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Data.Functor.Const Methods (<>) :: Const a b -> Const a b -> Const a b # sconcat :: NonEmpty (Const a b) -> Const a b # stimes :: Integral b0 => b0 -> Const a b -> Const a b #
(Applicative f, Semigroup a) => Semigroup (Ap f a)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Data.Monoid Methods (<>) :: Ap f a -> Ap f a -> Ap f a # sconcat :: NonEmpty (Ap f a) -> Ap f a # stimes :: Integral b => b -> Ap f a -> Ap f a #
Alternative f => Semigroup (Alt f a)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Data.Semigroup.Internal Methods (<>) :: Alt f a -> Alt f a -> Alt f a # sconcat :: NonEmpty (Alt f a) -> Alt f a # stimes :: Integral b => b -> Alt f a -> Alt f a #
Semigroup (f p) => Semigroup (Rec1 f p)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Generics Methods (<>) :: Rec1 f p -> Rec1 f p -> Rec1 f p # sconcat :: NonEmpty (Rec1 f p) -> Rec1 f p # stimes :: Integral b => b -> Rec1 f p -> Rec1 f p #
Semigroup a => Semigroup (Constant a b)
Instance details Defined in Data.Functor.Constant Methods (<>) :: Constant a b -> Constant a b -> Constant a b # sconcat :: NonEmpty (Constant a b) -> Constant a b # stimes :: Integral b0 => b0 -> Constant a b -> Constant a b #
(Semigroup a, Semigroup b, Semigroup c) => Semigroup (a, b, c)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Base Methods (<>) :: (a, b, c) -> (a, b, c) -> (a, b, c) # sconcat :: NonEmpty (a, b, c) -> (a, b, c) # stimes :: Integral b0 => b0 -> (a, b, c) -> (a, b, c) #
(Semigroup (f a), Semigroup (g a)) => Semigroup (Product f g a)	Since: base-4.16.0.0
Instance details Defined in Data.Functor.Product Methods (<>) :: Product f g a -> Product f g a -> Product f g a # sconcat :: NonEmpty (Product f g a) -> Product f g a # stimes :: Integral b => b -> Product f g a -> Product f g a #
(Semigroup (f p), Semigroup (g p)) => Semigroup ((f :*: g) p)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Generics Methods (<>) :: (f :: g) p -> (f :: g) p -> (f :: g) p # sconcat :: NonEmpty ((f :: g) p) -> (f :: g) p # stimes :: Integral b => b -> (f :: g) p -> (f :*: g) p #
Semigroup c => Semigroup (K1 i c p)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Generics Methods (<>) :: K1 i c p -> K1 i c p -> K1 i c p # sconcat :: NonEmpty (K1 i c p) -> K1 i c p # stimes :: Integral b => b -> K1 i c p -> K1 i c p #
Semigroup a => Semigroup (ParsecT s u m a)	The `Semigroup` instance for `ParsecT` is used to append the result of several parsers, for example: (many $ char `a`) <> (many $ char `b`) The above will parse a string like `"aabbb"` and return a successful parse result `"aabbb"`. Compare against the below which will produce a result of `"bbb"` for the same input: (many $ char `a`) >> (many $ char `b`) (many $ char `a`) > (many $ char `b`) Since: parsec-3.1.12*
Instance details Defined in Text.Parsec.Prim Methods (<>) :: ParsecT s u m a -> ParsecT s u m a -> ParsecT s u m a # sconcat :: NonEmpty (ParsecT s u m a) -> ParsecT s u m a # stimes :: Integral b => b -> ParsecT s u m a -> ParsecT s u m a #
(Semigroup a, Semigroup b, Semigroup c, Semigroup d) => Semigroup (a, b, c, d)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Base Methods (<>) :: (a, b, c, d) -> (a, b, c, d) -> (a, b, c, d) # sconcat :: NonEmpty (a, b, c, d) -> (a, b, c, d) # stimes :: Integral b0 => b0 -> (a, b, c, d) -> (a, b, c, d) #
Semigroup (f (g a)) => Semigroup (Compose f g a)	Since: base-4.16.0.0
Instance details Defined in Data.Functor.Compose Methods (<>) :: Compose f g a -> Compose f g a -> Compose f g a # sconcat :: NonEmpty (Compose f g a) -> Compose f g a # stimes :: Integral b => b -> Compose f g a -> Compose f g a #
Semigroup (f (g p)) => Semigroup ((f :.: g) p)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Generics Methods (<>) :: (f :.: g) p -> (f :.: g) p -> (f :.: g) p # sconcat :: NonEmpty ((f :.: g) p) -> (f :.: g) p # stimes :: Integral b => b -> (f :.: g) p -> (f :.: g) p #
Semigroup (f p) => Semigroup (M1 i c f p)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Generics Methods (<>) :: M1 i c f p -> M1 i c f p -> M1 i c f p # sconcat :: NonEmpty (M1 i c f p) -> M1 i c f p # stimes :: Integral b => b -> M1 i c f p -> M1 i c f p #
(Semigroup a, Semigroup b, Semigroup c, Semigroup d, Semigroup e) => Semigroup (a, b, c, d, e)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Base Methods (<>) :: (a, b, c, d, e) -> (a, b, c, d, e) -> (a, b, c, d, e) # sconcat :: NonEmpty (a, b, c, d, e) -> (a, b, c, d, e) # stimes :: Integral b0 => b0 -> (a, b, c, d, e) -> (a, b, c, d, e) #

class Semigroup a => Monoid a where #

The class of monoids (types with an associative binary operation that has an identity). Instances should satisfy the following:

Right identity: x <> mempty = x
Left identity: mempty <> x = x
Associativity: x <> (y <> z) = (x <> y) <> z (Semigroup law)
Concatenation: mconcat = foldr (<>) mempty

You can alternatively define mconcat instead of mempty, in which case the laws are:

Unit: mconcat (pure x) = x
Multiplication: mconcat (join xss) = mconcat (fmap mconcat xss)
Subclass: mconcat (toList xs) = sconcat xs

The method names refer to the monoid of lists under concatenation, but there are many other instances.

Some types can be viewed as a monoid in more than one way, e.g. both addition and multiplication on numbers. In such cases we often define newtypes and make those instances of Monoid, e.g. Sum and Product.

NOTE: Semigroup is a superclass of Monoid since base-4.11.0.0.

Minimal complete definition

mempty | mconcat

Methods

mempty :: a #

Identity of mappend

Examples

Expand

>>> "Hello world" <> mempty
"Hello world"

>>> mempty <> [1, 2, 3]
[1,2,3]

mappend :: a -> a -> a #

An associative operation

NOTE: This method is redundant and has the default implementation mappend = (<>) since base-4.11.0.0. Should it be implemented manually, since mappend is a synonym for (<>), it is expected that the two functions are defined the same way. In a future GHC release mappend will be removed from Monoid.

mconcat :: [a] -> a #

Fold a list using the monoid.

For most types, the default definition for mconcat will be used, but the function is included in the class definition so that an optimized version can be provided for specific types.

>>> mconcat ["Hello", " ", "Haskell", "!"]
"Hello Haskell!"

Instances

Instances details

Monoid Benchmark Source #
Instance details Defined in Distribution.Types.Benchmark Methods mempty :: Benchmark # mappend :: Benchmark -> Benchmark -> Benchmark # mconcat :: [Benchmark] -> Benchmark #
Monoid BenchmarkInterface Source #
Instance details Defined in Distribution.Types.BenchmarkInterface Methods mempty :: BenchmarkInterface # mappend :: BenchmarkInterface -> BenchmarkInterface -> BenchmarkInterface # mconcat :: [BenchmarkInterface] -> BenchmarkInterface #
Monoid BuildInfo Source #
Instance details Defined in Distribution.Types.BuildInfo Methods mempty :: BuildInfo # mappend :: BuildInfo -> BuildInfo -> BuildInfo # mconcat :: [BuildInfo] -> BuildInfo #
Monoid DependencyMap Source #
Instance details Defined in Distribution.Types.DependencyMap Methods mempty :: DependencyMap # mappend :: DependencyMap -> DependencyMap -> DependencyMap # mconcat :: [DependencyMap] -> DependencyMap #
Monoid Executable Source #
Instance details Defined in Distribution.Types.Executable Methods mempty :: Executable # mappend :: Executable -> Executable -> Executable # mconcat :: [Executable] -> Executable #
Monoid ExecutableScope Source #	`mempty` = `ExecutablePublic`
Instance details Defined in Distribution.Types.ExecutableScope Methods mempty :: ExecutableScope # mappend :: ExecutableScope -> ExecutableScope -> ExecutableScope # mconcat :: [ExecutableScope] -> ExecutableScope #
Monoid FlagAssignment Source #
Instance details Defined in Distribution.Types.Flag Methods mempty :: FlagAssignment # mappend :: FlagAssignment -> FlagAssignment -> FlagAssignment # mconcat :: [FlagAssignment] -> FlagAssignment #
Monoid ForeignLib Source #
Instance details Defined in Distribution.Types.ForeignLib Methods mempty :: ForeignLib # mappend :: ForeignLib -> ForeignLib -> ForeignLib # mconcat :: [ForeignLib] -> ForeignLib #
Monoid ForeignLibType Source #
Instance details Defined in Distribution.Types.ForeignLibType Methods mempty :: ForeignLibType # mappend :: ForeignLibType -> ForeignLibType -> ForeignLibType # mconcat :: [ForeignLibType] -> ForeignLibType #
Monoid Library Source #	This instance is not good. We need it for `addBuildableCondition`. More correct method would be some kind of "create empty clone". More concretely, `addBuildableCondition` will make `libVisibility = False` libraries when `buildable: false`. This may cause problems.
Instance details Defined in Distribution.Types.Library Methods mempty :: Library # mappend :: Library -> Library -> Library # mconcat :: [Library] -> Library #
Monoid LibraryVisibility Source #
Instance details Defined in Distribution.Types.LibraryVisibility Methods mempty :: LibraryVisibility # mappend :: LibraryVisibility -> LibraryVisibility -> LibraryVisibility # mconcat :: [LibraryVisibility] -> LibraryVisibility #
Monoid SetupBuildInfo Source #
Instance details Defined in Distribution.Types.SetupBuildInfo Methods mempty :: SetupBuildInfo # mappend :: SetupBuildInfo -> SetupBuildInfo -> SetupBuildInfo # mconcat :: [SetupBuildInfo] -> SetupBuildInfo #
Monoid TestSuite Source #
Instance details Defined in Distribution.Types.TestSuite Methods mempty :: TestSuite # mappend :: TestSuite -> TestSuite -> TestSuite # mconcat :: [TestSuite] -> TestSuite #
Monoid TestSuiteInterface Source #
Instance details Defined in Distribution.Types.TestSuiteInterface Methods mempty :: TestSuiteInterface # mappend :: TestSuiteInterface -> TestSuiteInterface -> TestSuiteInterface # mconcat :: [TestSuiteInterface] -> TestSuiteInterface #
Monoid UnqualComponentName Source #
Instance details Defined in Distribution.Types.UnqualComponentName Methods mempty :: UnqualComponentName # mappend :: UnqualComponentName -> UnqualComponentName -> UnqualComponentName # mconcat :: [UnqualComponentName] -> UnqualComponentName #
Monoid ShortText Source #
Instance details Defined in Distribution.Utils.ShortText Methods mempty :: ShortText # mappend :: ShortText -> ShortText -> ShortText # mconcat :: [ShortText] -> ShortText #
Monoid ByteArray	Since: base-4.17.0.0
Instance details Defined in Data.Array.Byte Methods mempty :: ByteArray # mappend :: ByteArray -> ByteArray -> ByteArray # mconcat :: [ByteArray] -> ByteArray #
Monoid Builder
Instance details Defined in Data.ByteString.Builder.Internal Methods mempty :: Builder # mappend :: Builder -> Builder -> Builder # mconcat :: [Builder] -> Builder #
Monoid ByteString
Instance details Defined in Data.ByteString.Internal.Type Methods mempty :: ByteString # mappend :: ByteString -> ByteString -> ByteString # mconcat :: [ByteString] -> ByteString #
Monoid ByteString
Instance details Defined in Data.ByteString.Lazy.Internal Methods mempty :: ByteString # mappend :: ByteString -> ByteString -> ByteString # mconcat :: [ByteString] -> ByteString #
Monoid ShortByteString
Instance details Defined in Data.ByteString.Short.Internal Methods mempty :: ShortByteString # mappend :: ShortByteString -> ShortByteString -> ShortByteString # mconcat :: [ShortByteString] -> ShortByteString #
Monoid IntSet
Instance details Defined in Data.IntSet.Internal Methods mempty :: IntSet # mappend :: IntSet -> IntSet -> IntSet # mconcat :: [IntSet] -> IntSet #
Monoid All	Since: base-2.1
Instance details Defined in GHC.Internal.Data.Semigroup.Internal Methods mempty :: All # mappend :: All -> All -> All # mconcat :: [All] -> All #
Monoid Any	Since: base-2.1
Instance details Defined in GHC.Internal.Data.Semigroup.Internal Methods mempty :: Any # mappend :: Any -> Any -> Any # mconcat :: [Any] -> Any #
Monoid Ordering	Since: base-2.1
Instance details Defined in GHC.Internal.Base Methods mempty :: Ordering # mappend :: Ordering -> Ordering -> Ordering # mconcat :: [Ordering] -> Ordering #
Monoid OsString	"String-Concatenation" for `OsString`. This is not the same as `(</>)`.
Instance details Defined in System.OsString.Internal.Types Methods mempty :: OsString # mappend :: OsString -> OsString -> OsString # mconcat :: [OsString] -> OsString #
Monoid PosixString
Instance details Defined in System.OsString.Internal.Types Methods mempty :: PosixString # mappend :: PosixString -> PosixString -> PosixString # mconcat :: [PosixString] -> PosixString #
Monoid WindowsString
Instance details Defined in System.OsString.Internal.Types Methods mempty :: WindowsString # mappend :: WindowsString -> WindowsString -> WindowsString # mconcat :: [WindowsString] -> WindowsString #
Monoid Doc
Instance details Defined in Text.PrettyPrint.HughesPJ Methods mempty :: Doc # mappend :: Doc -> Doc -> Doc # mconcat :: [Doc] -> Doc #
Monoid Builder
Instance details Defined in Data.Text.Internal.Builder Methods mempty :: Builder # mappend :: Builder -> Builder -> Builder # mconcat :: [Builder] -> Builder #
Monoid StrictTextBuilder
Instance details Defined in Data.Text.Internal.StrictBuilder Methods mempty :: StrictTextBuilder # mappend :: StrictTextBuilder -> StrictTextBuilder -> StrictTextBuilder # mconcat :: [StrictTextBuilder] -> StrictTextBuilder #
Monoid ()	Since: base-2.1
Instance details Defined in GHC.Internal.Base Methods mempty :: () # mappend :: () -> () -> () # mconcat :: [()] -> () #
Monoid (DList a) Source #
Instance details Defined in Distribution.Compat.DList Methods mempty :: DList a # mappend :: DList a -> DList a -> DList a # mconcat :: [DList a] -> DList a #
Semigroup a => Monoid (Option' a) Source #
Instance details Defined in Distribution.Compat.Semigroup Methods mempty :: Option' a # mappend :: Option' a -> Option' a -> Option' a # mconcat :: [Option' a] -> Option' a #
(Semigroup a, Monoid a) => Monoid (PerCompilerFlavor a) Source #
Instance details Defined in Distribution.Compiler Methods mempty :: PerCompilerFlavor a # mappend :: PerCompilerFlavor a -> PerCompilerFlavor a -> PerCompilerFlavor a # mconcat :: [PerCompilerFlavor a] -> PerCompilerFlavor a #
Monoid (Condition a) Source #
Instance details Defined in Distribution.Types.Condition Methods mempty :: Condition a # mappend :: Condition a -> Condition a -> Condition a # mconcat :: [Condition a] -> Condition a #
Monoid (Comparison a)	`mempty` on comparisons always returns `EQ`. Without newtypes this equals `pure (pure EQ)`. mempty :: Comparison a mempty = Comparison _ _ -> EQ
Instance details Defined in Data.Functor.Contravariant Methods mempty :: Comparison a # mappend :: Comparison a -> Comparison a -> Comparison a # mconcat :: [Comparison a] -> Comparison a #
Monoid (Equivalence a)	`mempty` on equivalences always returns `True`. Without newtypes this equals `pure (pure True)`. mempty :: Equivalence a mempty = Equivalence _ _ -> True
Instance details Defined in Data.Functor.Contravariant Methods mempty :: Equivalence a # mappend :: Equivalence a -> Equivalence a -> Equivalence a # mconcat :: [Equivalence a] -> Equivalence a #
Monoid (Predicate a)	`mempty` on predicates always returns `True`. Without newtypes this equals `pure True`. mempty :: Predicate a mempty = _ -> True
Instance details Defined in Data.Functor.Contravariant Methods mempty :: Predicate a # mappend :: Predicate a -> Predicate a -> Predicate a # mconcat :: [Predicate a] -> Predicate a #
(Ord a, Bounded a) => Monoid (Max a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods mempty :: Max a # mappend :: Max a -> Max a -> Max a # mconcat :: [Max a] -> Max a #
(Ord a, Bounded a) => Monoid (Min a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods mempty :: Min a # mappend :: Min a -> Min a -> Min a # mconcat :: [Min a] -> Min a #
Monoid m => Monoid (WrappedMonoid m)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods mempty :: WrappedMonoid m # mappend :: WrappedMonoid m -> WrappedMonoid m -> WrappedMonoid m # mconcat :: [WrappedMonoid m] -> WrappedMonoid m #
Monoid (PutM ())
Instance details Defined in Data.Binary.Put Methods mempty :: PutM () # mappend :: PutM () -> PutM () -> PutM () # mconcat :: [PutM ()] -> PutM () #
Monoid (IntMap a)
Instance details Defined in Data.IntMap.Internal Methods mempty :: IntMap a # mappend :: IntMap a -> IntMap a -> IntMap a # mconcat :: [IntMap a] -> IntMap a #
Monoid (Seq a)
Instance details Defined in Data.Sequence.Internal Methods mempty :: Seq a # mappend :: Seq a -> Seq a -> Seq a # mconcat :: [Seq a] -> Seq a #
Monoid (MergeSet a)
Instance details Defined in Data.Set.Internal Methods mempty :: MergeSet a # mappend :: MergeSet a -> MergeSet a -> MergeSet a # mconcat :: [MergeSet a] -> MergeSet a #
Ord a => Monoid (Set a)
Instance details Defined in Data.Set.Internal Methods mempty :: Set a # mappend :: Set a -> Set a -> Set a # mconcat :: [Set a] -> Set a #
Monoid a => Monoid (Identity a)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Data.Functor.Identity Methods mempty :: Identity a # mappend :: Identity a -> Identity a -> Identity a # mconcat :: [Identity a] -> Identity a #
Monoid (First a)	Since: base-2.1
Instance details Defined in GHC.Internal.Data.Monoid Methods mempty :: First a # mappend :: First a -> First a -> First a # mconcat :: [First a] -> First a #
Monoid (Last a)	Since: base-2.1
Instance details Defined in GHC.Internal.Data.Monoid Methods mempty :: Last a # mappend :: Last a -> Last a -> Last a # mconcat :: [Last a] -> Last a #
Monoid a => Monoid (Down a)	Since: base-4.11.0.0
Instance details Defined in GHC.Internal.Data.Ord Methods mempty :: Down a # mappend :: Down a -> Down a -> Down a # mconcat :: [Down a] -> Down a #
Monoid a => Monoid (Dual a)	Since: base-2.1
Instance details Defined in GHC.Internal.Data.Semigroup.Internal Methods mempty :: Dual a # mappend :: Dual a -> Dual a -> Dual a # mconcat :: [Dual a] -> Dual a #
Monoid (Endo a)	Since: base-2.1
Instance details Defined in GHC.Internal.Data.Semigroup.Internal Methods mempty :: Endo a # mappend :: Endo a -> Endo a -> Endo a # mconcat :: [Endo a] -> Endo a #
Num a => Monoid (Product a)	Since: base-2.1
Instance details Defined in GHC.Internal.Data.Semigroup.Internal Methods mempty :: Product a # mappend :: Product a -> Product a -> Product a # mconcat :: [Product a] -> Product a #
Num a => Monoid (Sum a)	Since: base-2.1
Instance details Defined in GHC.Internal.Data.Semigroup.Internal Methods mempty :: Sum a # mappend :: Sum a -> Sum a -> Sum a # mconcat :: [Sum a] -> Sum a #
(Generic a, Monoid (Rep a ())) => Monoid (Generically a)	Since: base-4.17.0.0
Instance details Defined in GHC.Internal.Generics Methods mempty :: Generically a # mappend :: Generically a -> Generically a -> Generically a # mconcat :: [Generically a] -> Generically a #
Monoid p => Monoid (Par1 p)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Generics Methods mempty :: Par1 p # mappend :: Par1 p -> Par1 p -> Par1 p # mconcat :: [Par1 p] -> Par1 p #
Monoid a => Monoid (IO a)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Base Methods mempty :: IO a # mappend :: IO a -> IO a -> IO a # mconcat :: [IO a] -> IO a #
Monoid (Doc a)
Instance details Defined in Text.PrettyPrint.Annotated.HughesPJ Methods mempty :: Doc a # mappend :: Doc a -> Doc a -> Doc a # mconcat :: [Doc a] -> Doc a #
Monoid a => Monoid (Q a)	Since: template-haskell-2.17.0.0
Instance details Defined in Language.Haskell.TH.Syntax Methods mempty :: Q a # mappend :: Q a -> Q a -> Q a # mconcat :: [Q a] -> Q a #
Semigroup a => Monoid (Maybe a)	Lift a semigroup into `Maybe` forming a `Monoid` according to http://en.wikipedia.org/wiki/Monoid: "Any semigroup `S` may be turned into a monoid simply by adjoining an element `e` not in `S` and defining `ee = e` and `es = s = se` for all `s ∈ S`." Since 4.11.0: constraint on inner `a` value generalised from `Monoid` to `Semigroup`. Since: base-2.1*
Instance details Defined in GHC.Internal.Base Methods mempty :: Maybe a # mappend :: Maybe a -> Maybe a -> Maybe a # mconcat :: [Maybe a] -> Maybe a #
Monoid a => Monoid (Solo a)	Since: base-4.15
Instance details Defined in GHC.Internal.Base Methods mempty :: Solo a # mappend :: Solo a -> Solo a -> Solo a # mconcat :: [Solo a] -> Solo a #
Monoid [a]	Since: base-2.1
Instance details Defined in GHC.Internal.Base Methods mempty :: [a] # mappend :: [a] -> [a] -> [a] # mconcat :: [[a]] -> [a] #
Monoid a => Monoid (Op a b)	`mempty @(Op a b)` without newtypes is `mempty @(b->a)` = `_ -> mempty`. mempty :: Op a b mempty = Op _ -> mempty
Instance details Defined in Data.Functor.Contravariant Methods mempty :: Op a b # mappend :: Op a b -> Op a b -> Op a b # mconcat :: [Op a b] -> Op a b #
Ord k => Monoid (Map k v)
Instance details Defined in Data.Map.Internal Methods mempty :: Map k v # mappend :: Map k v -> Map k v -> Map k v # mconcat :: [Map k v] -> Map k v #
Monoid (Proxy s)	Since: base-4.7.0.0
Instance details Defined in GHC.Internal.Data.Proxy Methods mempty :: Proxy s # mappend :: Proxy s -> Proxy s -> Proxy s # mconcat :: [Proxy s] -> Proxy s #
Monoid (U1 p)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Generics Methods mempty :: U1 p # mappend :: U1 p -> U1 p -> U1 p # mconcat :: [U1 p] -> U1 p #
(Monoid a, Monoid b) => Monoid (a, b)	Since: base-2.1
Instance details Defined in GHC.Internal.Base Methods mempty :: (a, b) # mappend :: (a, b) -> (a, b) -> (a, b) # mconcat :: [(a, b)] -> (a, b) #
Monoid b => Monoid (a -> b)	Since: base-2.1
Instance details Defined in GHC.Internal.Base Methods mempty :: a -> b # mappend :: (a -> b) -> (a -> b) -> a -> b # mconcat :: [a -> b] -> a -> b #
(Semigroup a, Semigroup c, Monoid a, Monoid c) => Monoid (CondTree v c a) Source #
Instance details Defined in Distribution.Types.CondTree Methods mempty :: CondTree v c a # mappend :: CondTree v c a -> CondTree v c a -> CondTree v c a # mconcat :: [CondTree v c a] -> CondTree v c a #
Monoid a => Monoid (Const a b)	Since: base-4.9.0.0
Instance details Defined in GHC.Internal.Data.Functor.Const Methods mempty :: Const a b # mappend :: Const a b -> Const a b -> Const a b # mconcat :: [Const a b] -> Const a b #
(Applicative f, Monoid a) => Monoid (Ap f a)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Data.Monoid Methods mempty :: Ap f a # mappend :: Ap f a -> Ap f a -> Ap f a # mconcat :: [Ap f a] -> Ap f a #
Alternative f => Monoid (Alt f a)	Since: base-4.8.0.0
Instance details Defined in GHC.Internal.Data.Semigroup.Internal Methods mempty :: Alt f a # mappend :: Alt f a -> Alt f a -> Alt f a # mconcat :: [Alt f a] -> Alt f a #
Monoid (f p) => Monoid (Rec1 f p)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Generics Methods mempty :: Rec1 f p # mappend :: Rec1 f p -> Rec1 f p -> Rec1 f p # mconcat :: [Rec1 f p] -> Rec1 f p #
Monoid a => Monoid (Constant a b)
Instance details Defined in Data.Functor.Constant Methods mempty :: Constant a b # mappend :: Constant a b -> Constant a b -> Constant a b # mconcat :: [Constant a b] -> Constant a b #
(Monoid a, Monoid b, Monoid c) => Monoid (a, b, c)	Since: base-2.1
Instance details Defined in GHC.Internal.Base Methods mempty :: (a, b, c) # mappend :: (a, b, c) -> (a, b, c) -> (a, b, c) # mconcat :: [(a, b, c)] -> (a, b, c) #
(Monoid (f a), Monoid (g a)) => Monoid (Product f g a)	Since: base-4.16.0.0
Instance details Defined in Data.Functor.Product Methods mempty :: Product f g a # mappend :: Product f g a -> Product f g a -> Product f g a # mconcat :: [Product f g a] -> Product f g a #
(Monoid (f p), Monoid (g p)) => Monoid ((f :*: g) p)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Generics Methods mempty :: (f :: g) p # mappend :: (f :: g) p -> (f :: g) p -> (f :: g) p # mconcat :: [(f :: g) p] -> (f :: g) p #
Monoid c => Monoid (K1 i c p)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Generics Methods mempty :: K1 i c p # mappend :: K1 i c p -> K1 i c p -> K1 i c p # mconcat :: [K1 i c p] -> K1 i c p #
(Monoid a, Semigroup (ParsecT s u m a)) => Monoid (ParsecT s u m a)	The `Monoid` instance for `ParsecT` is used for the same purposes as the `Semigroup` instance. Since: parsec-3.1.12
Instance details Defined in Text.Parsec.Prim Methods mempty :: ParsecT s u m a # mappend :: ParsecT s u m a -> ParsecT s u m a -> ParsecT s u m a # mconcat :: [ParsecT s u m a] -> ParsecT s u m a #
(Monoid a, Monoid b, Monoid c, Monoid d) => Monoid (a, b, c, d)	Since: base-2.1
Instance details Defined in GHC.Internal.Base Methods mempty :: (a, b, c, d) # mappend :: (a, b, c, d) -> (a, b, c, d) -> (a, b, c, d) # mconcat :: [(a, b, c, d)] -> (a, b, c, d) #
Monoid (f (g a)) => Monoid (Compose f g a)	Since: base-4.16.0.0
Instance details Defined in Data.Functor.Compose Methods mempty :: Compose f g a # mappend :: Compose f g a -> Compose f g a -> Compose f g a # mconcat :: [Compose f g a] -> Compose f g a #
Monoid (f (g p)) => Monoid ((f :.: g) p)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Generics Methods mempty :: (f :.: g) p # mappend :: (f :.: g) p -> (f :.: g) p -> (f :.: g) p # mconcat :: [(f :.: g) p] -> (f :.: g) p #
Monoid (f p) => Monoid (M1 i c f p)	Since: base-4.12.0.0
Instance details Defined in GHC.Internal.Generics Methods mempty :: M1 i c f p # mappend :: M1 i c f p -> M1 i c f p -> M1 i c f p # mconcat :: [M1 i c f p] -> M1 i c f p #
(Monoid a, Monoid b, Monoid c, Monoid d, Monoid e) => Monoid (a, b, c, d, e)	Since: base-2.1
Instance details Defined in GHC.Internal.Base Methods mempty :: (a, b, c, d, e) # mappend :: (a, b, c, d, e) -> (a, b, c, d, e) -> (a, b, c, d, e) # mconcat :: [(a, b, c, d, e)] -> (a, b, c, d, e) #

newtype All #

Boolean monoid under conjunction (&&).

All x <> All y = All (x && y)

Examples

Expand

>>> All True <> mempty <> All False)
All {getAll = False}

>>> mconcat (map (\x -> All (even x)) [2,4,6,7,8])
All {getAll = False}

>>> All True <> mempty
All {getAll = True}

Constructors

All
Fields getAll :: Bool

Instances

Instances details

Binary All

Since: binary-0.8.4.0

Instance details

Defined in Data.Binary.Class

Methods

put :: All -> Put #

get :: Get All #

putList :: [All] -> Put #

NFData All

Since: deepseq-1.4.0.0

Instance details

Defined in Control.DeepSeq

Methods

rnf :: All -> () #

Monoid All

Since: base-2.1

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Methods

mempty :: All #

mappend :: All -> All -> All #

mconcat :: [All] -> All #

Semigroup All

Since: base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Methods

(<>) :: All -> All -> All #

sconcat :: NonEmpty All -> All #

stimes :: Integral b => b -> All -> All #

Data All

Since: base-4.8.0.0

Instance details

Defined in GHC.Internal.Data.Data

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> All -> c All #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c All #

toConstr :: All -> Constr #

dataTypeOf :: All -> DataType #

dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c All) #

dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c All) #

gmapT :: (forall b. Data b => b -> b) -> All -> All #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> All -> r #

gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> All -> r #

gmapQ :: (forall d. Data d => d -> u) -> All -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> All -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> All -> m All #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> All -> m All #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> All -> m All #

Bounded All

Since: base-2.1

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Methods

minBound :: All #

maxBound :: All #

Generic All

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Associated Types

type Rep All	Since: base-4.7.0.0
Instance details Defined in GHC.Internal.Data.Semigroup.Internal type Rep All = D1 ('MetaData "All" "GHC.Internal.Data.Semigroup.Internal" "ghc-internal" 'True) (C1 ('MetaCons "All" 'PrefixI 'True) (S1 ('MetaSel ('Just "getAll") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Bool)))

Methods

from :: All -> Rep All x #

to :: Rep All x -> All #

Read All

Since: base-2.1

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Methods

readsPrec :: Int -> ReadS All #

readList :: ReadS [All] #

readPrec :: ReadPrec All #

readListPrec :: ReadPrec [All] #

Show All

Since: base-2.1

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Methods

showsPrec :: Int -> All -> ShowS #

show :: All -> String #

showList :: [All] -> ShowS #

Eq All

Since: base-2.1

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Methods

(==) :: All -> All -> Bool #

(/=) :: All -> All -> Bool #

Ord All

Since: base-2.1

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Methods

compare :: All -> All -> Ordering #

(<) :: All -> All -> Bool #

(<=) :: All -> All -> Bool #

(>) :: All -> All -> Bool #

(>=) :: All -> All -> Bool #

max :: All -> All -> All #

min :: All -> All -> All #

type Rep All

Since: base-4.7.0.0

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

type Rep All = D1 ('MetaData "All" "GHC.Internal.Data.Semigroup.Internal" "ghc-internal" 'True) (C1 ('MetaCons "All" 'PrefixI 'True) (S1 ('MetaSel ('Just "getAll") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Bool)))

newtype Any #

Boolean monoid under disjunction (||).

Any x <> Any y = Any (x || y)

Examples

Expand

>>> Any True <> mempty <> Any False
Any {getAny = True}

>>> mconcat (map (\x -> Any (even x)) [2,4,6,7,8])
Any {getAny = True}

>>> Any False <> mempty
Any {getAny = False}

Constructors

Any
Fields getAny :: Bool

Instances

Instances details

Binary Any

Since: binary-0.8.4.0

Instance details

Defined in Data.Binary.Class

Methods

put :: Any -> Put #

get :: Get Any #

putList :: [Any] -> Put #

NFData Any

Since: deepseq-1.4.0.0

Instance details

Defined in Control.DeepSeq

Methods

rnf :: Any -> () #

Monoid Any

Since: base-2.1

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Methods

mempty :: Any #

mappend :: Any -> Any -> Any #

mconcat :: [Any] -> Any #

Semigroup Any

Since: base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Methods

(<>) :: Any -> Any -> Any #

sconcat :: NonEmpty Any -> Any #

stimes :: Integral b => b -> Any -> Any #

Data Any

Since: base-4.8.0.0

Instance details

Defined in GHC.Internal.Data.Data

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Any -> c Any #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Any #

toConstr :: Any -> Constr #

dataTypeOf :: Any -> DataType #

dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Any) #

dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Any) #

gmapT :: (forall b. Data b => b -> b) -> Any -> Any #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Any -> r #

gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Any -> r #

gmapQ :: (forall d. Data d => d -> u) -> Any -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> Any -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> Any -> m Any #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Any -> m Any #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Any -> m Any #

Bounded Any

Since: base-2.1

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Methods

minBound :: Any #

maxBound :: Any #

Generic Any

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Associated Types

type Rep Any	Since: base-4.7.0.0
Instance details Defined in GHC.Internal.Data.Semigroup.Internal type Rep Any = D1 ('MetaData "Any" "GHC.Internal.Data.Semigroup.Internal" "ghc-internal" 'True) (C1 ('MetaCons "Any" 'PrefixI 'True) (S1 ('MetaSel ('Just "getAny") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Bool)))

Methods

from :: Any -> Rep Any x #

to :: Rep Any x -> Any #

Read Any

Since: base-2.1

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Methods

readsPrec :: Int -> ReadS Any #

readList :: ReadS [Any] #

readPrec :: ReadPrec Any #

readListPrec :: ReadPrec [Any] #

Show Any

Since: base-2.1

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Methods

showsPrec :: Int -> Any -> ShowS #

show :: Any -> String #

showList :: [Any] -> ShowS #

Eq Any

Since: base-2.1

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Methods

(==) :: Any -> Any -> Bool #

(/=) :: Any -> Any -> Bool #

Ord Any

Since: base-2.1

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

Methods

compare :: Any -> Any -> Ordering #

(<) :: Any -> Any -> Bool #

(<=) :: Any -> Any -> Bool #

(>) :: Any -> Any -> Bool #

(>=) :: Any -> Any -> Bool #

max :: Any -> Any -> Any #

min :: Any -> Any -> Any #

type Rep Any

Since: base-4.7.0.0

Instance details

Defined in GHC.Internal.Data.Semigroup.Internal

type Rep Any = D1 ('MetaData "Any" "GHC.Internal.Data.Semigroup.Internal" "ghc-internal" 'True) (C1 ('MetaCons "Any" 'PrefixI 'True) (S1 ('MetaSel ('Just "getAny") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Bool)))

newtype First' a Source #

A copy of First.

Constructors

First'
Fields getFirst' :: a

Instances

Instances details

Semigroup (First' a) Source #
Instance details Defined in Distribution.Compat.Semigroup Methods (<>) :: First' a -> First' a -> First' a # sconcat :: NonEmpty (First' a) -> First' a # stimes :: Integral b => b -> First' a -> First' a #
Show a => Show (First' a) Source #
Instance details Defined in Distribution.Compat.Semigroup Methods showsPrec :: Int -> First' a -> ShowS # show :: First' a -> String # showList :: [First' a] -> ShowS #
Eq a => Eq (First' a) Source #
Instance details Defined in Distribution.Compat.Semigroup Methods (==) :: First' a -> First' a -> Bool # (/=) :: First' a -> First' a -> Bool #
Ord a => Ord (First' a) Source #
Instance details Defined in Distribution.Compat.Semigroup Methods compare :: First' a -> First' a -> Ordering # (<) :: First' a -> First' a -> Bool # (<=) :: First' a -> First' a -> Bool # (>) :: First' a -> First' a -> Bool # (>=) :: First' a -> First' a -> Bool # max :: First' a -> First' a -> First' a # min :: First' a -> First' a -> First' a #

newtype Last' a Source #

A copy of Last.

Constructors

Last'
Fields getLast' :: a

Instances

Instances details

Functor Last' Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

fmap :: (a -> b) -> Last' a -> Last' b #

(<$) :: a -> Last' b -> Last' a #

Structured a => Structured (Last' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

structure :: Proxy (Last' a) -> Structure Source #

structureHash' :: Tagged (Last' a) MD5

Binary a => Binary (Last' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

put :: Last' a -> Put #

get :: Get (Last' a) #

putList :: [Last' a] -> Put #

Semigroup (Last' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

(<>) :: Last' a -> Last' a -> Last' a #

sconcat :: NonEmpty (Last' a) -> Last' a #

stimes :: Integral b => b -> Last' a -> Last' a #

Generic (Last' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Associated Types

type Rep (Last' a)
Instance details Defined in Distribution.Compat.Semigroup type Rep (Last' a) = D1 ('MetaData "Last'" "Distribution.Compat.Semigroup" "Cabal-syntax-3.16.0.0-inplace" 'True) (C1 ('MetaCons "Last'" 'PrefixI 'True) (S1 ('MetaSel ('Just "getLast'") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 a)))

Methods

from :: Last' a -> Rep (Last' a) x #

to :: Rep (Last' a) x -> Last' a #

Read a => Read (Last' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

readsPrec :: Int -> ReadS (Last' a) #

readList :: ReadS [Last' a] #

readPrec :: ReadPrec (Last' a) #

readListPrec :: ReadPrec [Last' a] #

Show a => Show (Last' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

showsPrec :: Int -> Last' a -> ShowS #

show :: Last' a -> String #

showList :: [Last' a] -> ShowS #

Eq a => Eq (Last' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

(==) :: Last' a -> Last' a -> Bool #

(/=) :: Last' a -> Last' a -> Bool #

Ord a => Ord (Last' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

compare :: Last' a -> Last' a -> Ordering #

(<) :: Last' a -> Last' a -> Bool #

(<=) :: Last' a -> Last' a -> Bool #

(>) :: Last' a -> Last' a -> Bool #

(>=) :: Last' a -> Last' a -> Bool #

max :: Last' a -> Last' a -> Last' a #

min :: Last' a -> Last' a -> Last' a #

type Rep (Last' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

type Rep (Last' a) = D1 ('MetaData "Last'" "Distribution.Compat.Semigroup" "Cabal-syntax-3.16.0.0-inplace" 'True) (C1 ('MetaCons "Last'" 'PrefixI 'True) (S1 ('MetaSel ('Just "getLast'") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 a)))

newtype Option' a Source #

A wrapper around Maybe, providing the Semigroup and Monoid instances implemented for Maybe since base-4.11.

Constructors

Option'
Fields getOption' :: Maybe a

Instances

Instances details

Functor Option' Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

fmap :: (a -> b) -> Option' a -> Option' b #

(<$) :: a -> Option' b -> Option' a #

Structured a => Structured (Option' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

structure :: Proxy (Option' a) -> Structure Source #

structureHash' :: Tagged (Option' a) MD5

Binary a => Binary (Option' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

put :: Option' a -> Put #

get :: Get (Option' a) #

putList :: [Option' a] -> Put #

Semigroup a => Monoid (Option' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

mempty :: Option' a #

mappend :: Option' a -> Option' a -> Option' a #

mconcat :: [Option' a] -> Option' a #

Semigroup a => Semigroup (Option' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

(<>) :: Option' a -> Option' a -> Option' a #

sconcat :: NonEmpty (Option' a) -> Option' a #

stimes :: Integral b => b -> Option' a -> Option' a #

Generic (Option' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Associated Types

type Rep (Option' a)
Instance details Defined in Distribution.Compat.Semigroup type Rep (Option' a) = D1 ('MetaData "Option'" "Distribution.Compat.Semigroup" "Cabal-syntax-3.16.0.0-inplace" 'True) (C1 ('MetaCons "Option'" 'PrefixI 'True) (S1 ('MetaSel ('Just "getOption'") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Maybe a))))

Methods

from :: Option' a -> Rep (Option' a) x #

to :: Rep (Option' a) x -> Option' a #

Read a => Read (Option' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

readsPrec :: Int -> ReadS (Option' a) #

readList :: ReadS [Option' a] #

readPrec :: ReadPrec (Option' a) #

readListPrec :: ReadPrec [Option' a] #

Show a => Show (Option' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

showsPrec :: Int -> Option' a -> ShowS #

show :: Option' a -> String #

showList :: [Option' a] -> ShowS #

Eq a => Eq (Option' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

(==) :: Option' a -> Option' a -> Bool #

(/=) :: Option' a -> Option' a -> Bool #

Ord a => Ord (Option' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

Methods

compare :: Option' a -> Option' a -> Ordering #

(<) :: Option' a -> Option' a -> Bool #

(<=) :: Option' a -> Option' a -> Bool #

(>) :: Option' a -> Option' a -> Bool #

(>=) :: Option' a -> Option' a -> Bool #

max :: Option' a -> Option' a -> Option' a #

min :: Option' a -> Option' a -> Option' a #

type Rep (Option' a) Source #

Instance details

Defined in Distribution.Compat.Semigroup

type Rep (Option' a) = D1 ('MetaData "Option'" "Distribution.Compat.Semigroup" "Cabal-syntax-3.16.0.0-inplace" 'True) (C1 ('MetaCons "Option'" 'PrefixI 'True) (S1 ('MetaSel ('Just "getOption'") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Maybe a))))

gmappend :: (Generic a, GSemigroup (Rep a)) => a -> a -> a Source #

Generically generate a Semigroup (<>) operation for any type implementing Generic. This operation will append two values by point-wise appending their component fields. It is only defined for product types.

gmappend a (gmappend b c) = gmappend (gmappend a b) c

gmempty :: (Generic a, GMonoid (Rep a)) => a Source #

Generically generate a Monoid mempty for any product-like type implementing Generic.

It is only defined for product types.

gmappend gmempty a = a = gmappend a gmempty