Data.Default

Documentation

This module defines a class for types with a default value. Instances are provided for '()', Set, Map, Int, Integer, Float, Double, and many others (see below).

class Default a where

A class for types with a default value.

Methods

def :: a

The default value for this type.

Instances

Default Double

Default Float

Default Int

Default Int8

Default Int16

Default Int32

Default Int64

Default Integer

Default Ordering

Default Word

Default Word8

Default Word16

Default Word32

Default Word64

Default ()

Default All

Default Any

Default IntSet

Default TimeLocale

Default [a]

Integral a => Default (Ratio a)

Default a => Default (IO a)

(Default a, RealFloat a) => Default (Complex a)

Default a => Default (Dual a)

Default (Endo a)

Num a => Default (Sum a)

Num a => Default (Product a)

Default (First a)

Default (Last a)

Default (Maybe a)

Default a => Default (Tree a)

Default (Seq a)

Default (IntMap v)

Default (Set v)

Default (DList a)

Default r => Default (e -> r)

(Default a, Default b) => Default (a, b)

Default (Map k v)

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

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

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