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 Integer

Default Ordering

Default ()

Default All

Default Any

Default IntSet

Default [a]

Integral a => Default (Ratio a)

Default a => Default (IO 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)