Safe Haskell	Safe
Language	Haskell2010

Data.ISBN.Types

Synopsis

data ISBN
- = ISBN10 Text
- | ISBN13 Text

Documentation

data ISBN Source #

Data type for representing ISBN values. Values of this type should be created safely using validateISBN, which will produce ISBN10 or ISBN13 values after validating the input.

The validateISBN10 and validateISBN13 functions can also be used to only attempt to create ISBNs of a specific type.

When importing this data type, it is recommended not expose the constructors, and instead use unsafeToISBN10 or unsafeToISBN13 to coerce Text values into ISBN values.

Constructors

ISBN10 Text	An ISBN-10 value. Consists of 9 digits followed by a base-11 check digit (`0-9` or `'X'`).
ISBN13 Text	An ISBN-13 value. Consists of 12 digits followed by a base-10 check digit (`0-9`).

Instances

Eq ISBN Source #
Instance details Defined in Data.ISBN.Types Methods (==) :: ISBN -> ISBN -> Bool # (/=) :: ISBN -> ISBN -> Bool #
Show ISBN Source #
Instance details Defined in Data.ISBN.Types Methods showsPrec :: Int -> ISBN -> ShowS # show :: ISBN -> String # showList :: [ISBN] -> ShowS #