| Copyright | Copyright (C) 2009-2011 John Goerzen |
|---|---|
| License | BSD3 |
| Maintainer | John Goerzen <jgoerzen@complete.org> |
| Stability | provisional |
| Portability | portable |
| Safe Haskell | Safe |
| Language | Haskell98 |
Data.Convertible.Base
Description
- convert :: Convertible a b => a -> b
- class Convertible a b where
- type ConvertResult a = Either ConvertError a
- data ConvertError = ConvertError {}
- convError :: (Show a, Typeable a, Typeable b) => String -> a -> ConvertResult b
- prettyConvertError :: ConvertError -> String
The conversion process
convert :: Convertible a b => a -> b #
Convert from one type of data to another. Raises an exception if there is
an error with the conversion. For a function that does not raise an exception
in that case, see safeConvert.
class Convertible a b where #
A typeclass that represents something that can be converted.
A Convertible a b instance represents an a that can be converted to a b.
Minimal complete definition
Methods
safeConvert :: a -> ConvertResult b #
Convert a to b, returning Right on success and Left on error.
For a simpler interface, see convert.
Handling the results
type ConvertResult a = Either ConvertError a #
The result of a safe conversion via safeConvert.
data ConvertError #
How we indicate that there was an error.
Constructors
| ConvertError | |
Fields | |
Instances