9da33cd371
Ignore-this: 5ec11b8739b241f1cc2935f5f8e34bfb darcs-hash:20121208023123-76d51-b27be713e80337673d35c2b749a52e964810b17b
31 lines
1.0 KiB
Haskell
31 lines
1.0 KiB
Haskell
{-# LANGUAGE DeriveDataTypeable #-}
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module Data.Encoding.Exception where
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import Control.Exception.Extensible
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import Data.Word
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import Data.Typeable
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import Control.Monad.Identity
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-- | This exception type is thrown whenever something went wrong during the
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-- encoding-process.
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data EncodingException
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= HasNoRepresentation Char -- ^ Thrown if a specific character
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-- is not representable in an encoding.
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deriving (Eq,Ord,Show,Read,Typeable)
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instance Exception EncodingException
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-- | This exception type is thrown whenever something went wrong during the
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-- decoding-process.
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data DecodingException
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= IllegalCharacter Word8 -- ^ The sequence contained an illegal
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-- byte that couldn't be decoded.
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| UnexpectedEnd -- ^ more bytes were needed to allow a
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-- successfull decoding.
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| OutOfRange -- ^ the decoded value was out of the unicode range
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| IllegalRepresentation [Word8] -- ^ The character sequence encodes a
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-- character, but is illegal.
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deriving (Eq,Ord,Show,Read,Typeable)
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instance Exception DecodingException
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