Air.Data.Monoid

Documentation

class Monoid a where

Minimal complete definition

mempty, mappend

Methods

mempty :: a

Identity of mappend

mappend :: a -> a -> a

An associative operation

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.

Instances

Monoid Double

Monoid Float

Monoid Int

Monoid Int8

Monoid Int16

Monoid Int32

Monoid Int64

Monoid Integer

Monoid Word8

Monoid Word16

Monoid Word32

Monoid Word64

Monoid ()

Monoid ByteString

Monoid ByteString

Monoid Text

Monoid Text

Monoid [a]

Monoid (Maybe a)

Ord a => Monoid (Set a)

Monoid (Seq a)

Monoid b => Monoid (a -> b)

(Monoid a, Monoid b) => Monoid (a, b)

Ord a => Monoid (Map a b)

(Monoid a, Monoid b, Monoid c) => Monoid (a, b, c)

(Monoid a, Monoid b, Monoid c, Monoid d) => Monoid (a, b, c, d)

(Monoid a, Monoid b, Monoid c, Monoid d, Monoid e) => Monoid (a, b, c, d, e)

(+) :: Monoid a => a -> a -> a infixl 6