Safe Haskell	None
Language	Haskell98

Data.Ix.Enum

Description

Implementations of Ix methods in terms of Enum methods.

For a type T of class Enum you can easily define an Ix instance by copying the following code into your module:

import qualified Data.Ix.Enum as IxEnum

instance Ix T where
   range           = IxEnum.range
   index           = IxEnum.index
   inRange         = IxEnum.inRange
   rangeSize       = IxEnum.rangeSize
   unsafeIndex     = IxEnum.unsafeIndex
   unsafeRangeSize = IxEnum.unsafeRangeSize

Synopsis

range :: Enum a => (a, a) -> [a]
index :: Enum a => (a, a) -> a -> Int
unsafeIndex :: Enum a => (a, a) -> a -> Int
inRange :: Enum a => (a, a) -> a -> Bool
rangeSize :: Enum a => (a, a) -> Int
unsafeRangeSize :: Enum a => (a, a) -> Int

Documentation

range :: Enum a => (a, a) -> [a] Source #

>>> range ('x','z')
"xyz"
>>> range (LT,GT)
[LT,EQ,GT]

index :: Enum a => (a, a) -> a -> Int Source #

>>> index ('a','z') 'e'
4

unsafeIndex :: Enum a => (a, a) -> a -> Int Source #

>>> unsafeIndex ('a','z') 'e'
4

inRange :: Enum a => (a, a) -> a -> Bool Source #

>>> inRange ('a','z') 'e'
True
>>> inRange ('x','z') 'a'
False

rangeSize :: Enum a => (a, a) -> Int Source #

>>> rangeSize ('x','z')
3

unsafeRangeSize :: Enum a => (a, a) -> Int Source #

>>> unsafeRangeSize ('x','z')
3