data-default-0.3.0: A class for types with a default value Source code Contents Index

Data.Default

Synopsis

class Default a where def :: a

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 Source

A class for types with a default value. Methods def :: a Source 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 (IntMap v) Default (Set v) Default (Seq a) 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)

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