ASCII.Group

ASCII characters are broadly categorized into two groups: control codes and printable characters.

The Group type

data Group

Constructors

Control

33 of the ASCII characters are control codes. A few of these are still in use, but most are obsolete relics of the early days of computing.

Printable

95 of the ASCII characters are printable characters such as letters and numbers, mostly corresponding to the keys on an American English keyboard.

Instances

Bounded Group

Defined in ASCII.Group

Methods

minBound :: Group

maxBound :: Group

Enum Group

Defined in ASCII.Group

Methods

succ :: Group -> Group

pred :: Group -> Group

toEnum :: Int -> Group

fromEnum :: Group -> Int

enumFrom :: Group -> [Group]

enumFromThen :: Group -> Group -> [Group]

enumFromTo :: Group -> Group -> [Group]

enumFromThenTo :: Group -> Group -> Group -> [Group]

Eq Group

Defined in ASCII.Group

Methods

(==) :: Group -> Group -> Bool

(/=) :: Group -> Group -> Bool

Data Group

Defined in ASCII.Group

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Group -> c Group

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Group

toConstr :: Group -> Constr

dataTypeOf :: Group -> DataType

dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Group)

dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Group)

gmapT :: (forall b. Data b => b -> b) -> Group -> Group

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Group -> r

gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Group -> r

gmapQ :: (forall d. Data d => d -> u) -> Group -> [u]

gmapQi :: Int -> (forall d. Data d => d -> u) -> Group -> u

gmapM :: Monad m => (forall d. Data d => d -> m d) -> Group -> m Group

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Group -> m Group

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Group -> m Group

Ord Group

Defined in ASCII.Group

Methods

compare :: Group -> Group -> Ordering

(<) :: Group -> Group -> Bool

(<=) :: Group -> Group -> Bool

(>) :: Group -> Group -> Bool

(>=) :: Group -> Group -> Bool

max :: Group -> Group -> Group

min :: Group -> Group -> Group

Show Group

Defined in ASCII.Group

Methods

showsPrec :: Int -> Group -> ShowS

show :: Group -> String

showList :: [Group] -> ShowS

Generic Group

Defined in ASCII.Group

Associated Types

type Rep Group :: Type -> Type

Methods

from :: Group -> Rep Group x

to :: Rep Group x -> Group

Hashable Group

Defined in ASCII.Group

Methods

hashWithSalt :: Int -> Group -> Int

hash :: Group -> Int

type Rep Group

Defined in ASCII.Group

type Rep Group = D1 ('MetaData "Group" "ASCII.Group" "ascii-group-1.0.0.6-AWec6PAMYcb6vnQp6Tw106" 'False) (C1 ('MetaCons "Control" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "Printable" 'PrefixI 'False) (U1 :: Type -> Type))

Functions

charGroup :: Char -> Group

Determine which group a particular character belongs to.

>>> map charGroup [CapitalLetterA,EndOfTransmission]
[Printable,Control]

inGroup :: Group -> Char -> Bool

Test whether a character belongs to a particular group.

>>> inGroup Printable EndOfTransmission
False

>>> inGroup Control EndOfTransmission
True

Notes

Space is a printable character (perhaps surprisingly, given that it is invisible).

>>> charGroup Space
Printable

Tab is a control code (perhaps surprisingly, given that space is a printable character).

>>> charGroup HorizontalTab
Control

A few examples of printable characters:

>>> all (inGroup Printable) [CapitalLetterA,SmallLetterZ,Digit4,Tilde]
True

A few examples of control characters:

>>> all (inGroup Control) [Null,Substitute,UnitSeparator,Delete]
True

There are 33 control codes.

>>> length (filter (inGroup Control) allCharacters)
33

There are 95 printable characters.

>>> length (filter (inGroup Printable) allCharacters)
95