Data.Char.Roman

This module aims to convert Roman numerals to a String of unicode characters that represent Roman numerals.

One can convert numbers to Roman numerals in uppercase and lowercase, and in Additive and Subtractive style.

Data types to represent Roman numerals

data RomanLiteral

Roman numerals for which a unicode character exists.

Constructors

I

The unicode character for the Roman numeral one: Ⅰ.

II

The unicode character for the Roman numeral two: Ⅱ.

III

The unicode character for the Roman numeral three: Ⅲ.

IV

The unicode character for the Roman numeral four: Ⅳ.

V

The unicode character for the Roman numeral five: Ⅴ.

VI

The unicode character for the Roman numeral six: Ⅵ.

VII

The unicode character for the Roman numeral seven: Ⅶ.

VIII

The unicode character for the Roman numeral eight: Ⅷ.

IX

The unicode character for the Roman numeral nine: Ⅸ.

X

The unicode character for the Roman numeral ten: Ⅹ.

XI

The unicode character for the Roman numeral eleven: Ⅺ.

XII

The unicode character for the Roman numeral twelve: Ⅻ.

L

The unicode character for the Roman numeral fifty: Ⅼ.

C

The unicode character for the Roman numeral hundred: Ⅽ.

D

The unicode character for the Roman numeral five hundred: Ⅾ.

M

The unicode character for the Roman numeral thousand: Ⅿ.

Instances

Bounded RomanLiteral

Defined in Data.Char.Roman

Methods

minBound :: RomanLiteral

maxBound :: RomanLiteral

Enum RomanLiteral

Defined in Data.Char.Roman

Methods

succ :: RomanLiteral -> RomanLiteral

pred :: RomanLiteral -> RomanLiteral

toEnum :: Int -> RomanLiteral

fromEnum :: RomanLiteral -> Int

enumFrom :: RomanLiteral -> [RomanLiteral]

enumFromThen :: RomanLiteral -> RomanLiteral -> [RomanLiteral]

enumFromTo :: RomanLiteral -> RomanLiteral -> [RomanLiteral]

enumFromThenTo :: RomanLiteral -> RomanLiteral -> RomanLiteral -> [RomanLiteral]

Eq RomanLiteral

Defined in Data.Char.Roman

Methods

(==) :: RomanLiteral -> RomanLiteral -> Bool

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

Read RomanLiteral

Defined in Data.Char.Roman

Methods

readsPrec :: Int -> ReadS RomanLiteral

readList :: ReadS [RomanLiteral]

readPrec :: ReadPrec RomanLiteral

readListPrec :: ReadPrec [RomanLiteral]

Show RomanLiteral

Defined in Data.Char.Roman

Methods

showsPrec :: Int -> RomanLiteral -> ShowS

show :: RomanLiteral -> String

showList :: [RomanLiteral] -> ShowS

data RomanStyle

The style to convert a number to a Roman numeral.

Constructors

Additive

The additive style converts four to ⅠⅠⅠⅠ.

Subtractive

The subtractive style converts four to ⅠⅤ.

Instances

Bounded RomanStyle

Defined in Data.Char.Roman

Methods

minBound :: RomanStyle

maxBound :: RomanStyle

Enum RomanStyle

Defined in Data.Char.Roman

Methods

succ :: RomanStyle -> RomanStyle

pred :: RomanStyle -> RomanStyle

toEnum :: Int -> RomanStyle

fromEnum :: RomanStyle -> Int

enumFrom :: RomanStyle -> [RomanStyle]

enumFromThen :: RomanStyle -> RomanStyle -> [RomanStyle]

enumFromTo :: RomanStyle -> RomanStyle -> [RomanStyle]

enumFromThenTo :: RomanStyle -> RomanStyle -> RomanStyle -> [RomanStyle]

Eq RomanStyle

Defined in Data.Char.Roman

Methods

(==) :: RomanStyle -> RomanStyle -> Bool

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

Read RomanStyle

Defined in Data.Char.Roman

Methods

readsPrec :: Int -> ReadS RomanStyle

readList :: ReadS [RomanStyle]

readPrec :: ReadPrec RomanStyle

readListPrec :: ReadPrec [RomanStyle]

Show RomanStyle

Defined in Data.Char.Roman

Methods

showsPrec :: Int -> RomanStyle -> ShowS

show :: RomanStyle -> String

showList :: [RomanStyle] -> ShowS

Arbitrary RomanStyle

Defined in Data.Char.Roman

Methods

arbitrary :: Gen RomanStyle

shrink :: RomanStyle -> [RomanStyle]

Default RomanStyle

Defined in Data.Char.Roman

Methods

def :: RomanStyle

Convert a number to Roman literals

toLiterals

Arguments

:: Integral i

=> RomanStyle

Specifies if the Numeral is Additive or Subtractive style.

-> Ligate

Specifies if characters like ⅠⅤ are joined to Ⅳ.

-> i

The given number to convert.

-> Maybe [RomanLiteral]

A list of RomanLiterals if the given number can be specified with Roman numerals, Nothing otherwise.

Convert the given number with the given RomanStyle and Ligate style to a sequence of RomanLiterals, given the number can be represented with Roman numerals (is strictly larger than zero).

romanLiteral

Arguments

:: RomanLiteral

The given RomanLiteral to convert.

-> Char

A unicode character that represents the given RomanLiteral.

Convert the given RomanLiteral object to a unicode character in uppercase.

romanLiteral'

Arguments

:: RomanLiteral

The given RomanLiteral to convert.

-> Char

A unicode character that represents the given RomanLiteral.

Convert the given RomanLiteral object to a unicode character in lowercase.

Convert a number to text

romanNumeral

Arguments

:: [RomanLiteral]

The given list of RomanLiteral objects to convert to a Unicode equivalent.

-> Text

A Text object that contains a sequence of unicode characters that represents the RomanLiterals.

Convert a sequence of RomanLiteral objects to a Text object that contains a sequence of corresponding Unicode characters which are Roman numberals in uppercase.

romanNumeral'

Arguments

:: [RomanLiteral]

The given list of RomanLiteral objects to convert to a Unicode equivalent.

-> Text

A Text object that contains a sequence of unicode characters that represents the RomanLiterals.

Convert a sequence of RomanLiteral objects to a Text object that contains a sequence of corresponding Unicode characters which are Roman numberals in lowercase.

romanNumber

Arguments

:: Integral i

=> RomanStyle

Specifies if the Numeral is Additive or Subtractive style.

-> Ligate

Specifies if characters like ⅠⅤ are joined to Ⅳ.

-> i

The given number to convert.

-> Maybe Text

A Text if the given number can be specified with Roman numerals wrapped in a Just, Nothing otherwise.

Convert a given number to a Text wrapped in a Just data constructor, given the number can be converted to a Roman numeral, given it can be represented. Nothing in case it can not be represented. The number is written in Roman numerals in uppercase.

romanNumber'

Arguments

:: Integral i

=> RomanStyle

Specifies if the Numeral is Additive or Subtractive style.

-> Ligate

Specifies if characters like ⅠⅤ are joined to Ⅳ.

-> i

The given number to convert.

-> Maybe Text

A Text if the given number can be specified with Roman numerals wrapped in a Just, Nothing otherwise.

Convert a given number to a Text wrapped in a Just data constructor, given the number can be converted to a Roman numeral, given it can be represented. Nothing in case it can not be represented. The number is written in Roman numerals in lowercase.