> PandocMonad m => ReaderOptions -> [(FilePath, Text)] -> m Pandoc


I like this idea, but I have two suggestions for the bikeshed colors:


1. You already mentioned ByteString instances for the PandocInput 
typeclass. How about [(FilePath, ByteString)] as well?


2. May I suggest a record instead of a tuple. For example, the type 
could become (disregarding the new typeclass for clarity)

     PandocMonad m => ReaderOptions -> [PandocInputFile] -> m Pandoc

     data PandocInputFile = PandocInputFile { inputFileName :: FilePath, 
inputFileHandle :: Handle}

Now a Reader author can get a rich API like

inputFileHandle :: PandocInputFile -> Handle inputFileAsByteString :: 
PandocInputFile -> ByteString
	inputFileAsText       ::PandocInputFile -> TextinputFileName :: PandocInputFile -> FilePath 
inputFolder :: PandocInputFile -> FilePath

But especially if the constructor is hidden, this would still allow for 
re-shuffeling under the hood if necessary.

Part of me wants to generalize this further by turning the record back 
into a (free and comonadic I think?) functor, but that may be going too far.


3. Well actually, how about…

     instance Foldable f => PandocInput (f PandocInputFile) where…

Ok, now I'm really shedding my bikes all over your beautiful couch. 
Sorry about that.


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