Pdf.Toolbox.Core.Error

Error used by API

Documentation

data PdfError

Errors

Constructors

ParseError [String] String

Parser error

IOError IOError

AnnotatedError String PdfError

UnexpectedError String

Something unexpected

Instances

Show PdfError

type PdfE m = ExceptT PdfError m

API uses this for error handling

annotateError :: Monad m => String -> PdfE m a -> PdfE m a

Wrap any PdfError into AnnotatedError

Usefull when you want to add high-level description to error, returned by low-level function

annotatingError :: Monad m => PdfE m a -> String -> PdfE m a

annotateError with fliped arguments

tryPdfIO :: MonadIO m => IO a -> PdfE m a

Catch exception if any and convert to IOError

module Control.Error