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|
{-# LANGUAGE NoImplicitPrelude, UnicodeSyntax #-}
{-|
Module : Data.Foldable.Unicode
Copyright : 2009–2011 Roel van Dijk
License : BSD3 (see the file LICENSE)
Maintainer : Roel van Dijk <vandijk.roel@gmail.com>
-}
module Data.Foldable.Unicode where
-------------------------------------------------------------------------------
-- Imports
-------------------------------------------------------------------------------
-- from base:
import Data.Bool ( Bool )
import Data.Eq ( Eq )
import Data.Function ( flip )
import Data.Foldable ( Foldable, elem, notElem )
-------------------------------------------------------------------------------
-- Fixities
-------------------------------------------------------------------------------
infix 4 ∈
infix 4 ∋
infix 4 ∉
infix 4 ∌
-------------------------------------------------------------------------------
-- Symbols
-------------------------------------------------------------------------------
{-|
(∈) = 'elem'
U+2208, ELEMENT OF
-}
(∈) ∷ (Foldable t, Eq α) ⇒ α → t α → Bool
(∈) = elem
{-# INLINE (∈) #-}
{-|
(∋) = 'flip' (∈)
U+220B, CONTAINS AS MEMBER
-}
(∋) ∷ (Foldable t, Eq α) ⇒ t α → α → Bool
(∋) = flip (∈)
{-# INLINE (∋) #-}
{-|
(∉) = 'notElem'
U+2209, NOT AN ELEMENT OF
-}
(∉) ∷ (Foldable t, Eq α) ⇒ α → t α → Bool
(∉) = notElem
{-# INLINE (∉) #-}
{-|
(∌) = 'flip' (∉)
U+220C, DOES NOT CONTAIN AS MEMBER
-}
(∌) ∷ (Foldable t, Eq α) ⇒ t α → α → Bool
(∌) = flip (∉)
{-# INLINE (∌) #-}
|
