Data.Empty

Documentation

class AsEmpty a where

A type that may be empty. If your type does not have a special empty value, just wrap it into Maybe, it is free.

Based on Control.Lens.Empty.AsEmpty.

Minimal complete definition

empty

Methods

empty :: a

isEmpty :: a -> Bool

isEmpty :: Eq a => a -> Bool

isNotEmpty :: a -> Bool

isNotEmpty :: Eq a => a -> Bool

Instances

AsEmpty Char

Defined in Data.Empty

Methods

empty :: Char

isEmpty :: Char -> Bool

isNotEmpty :: Char -> Bool

AsEmpty (Maybe a)

Defined in Data.Empty

Methods

empty :: Maybe a

isEmpty :: Maybe a -> Bool

isNotEmpty :: Maybe a -> Bool