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46 lines
1.1 KiB
Haskell
46 lines
1.1 KiB
Haskell
module Noun
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( module Noun.Core
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, module Noun.Convert
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, module Noun.Conversions
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, module Noun.Atom
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, module Noun.Jam
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, module Noun.Cue
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, module Noun.TH
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, module Data.Word
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, _Cue
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, loadFile
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) where
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import ClassyPrelude
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import Control.Lens
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import Noun.Atom
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import Noun.Conversions
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import Noun.Convert
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import Noun.Core
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import Noun.Cue
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import Noun.Jam
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import Noun.TH
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import Data.Word
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--------------------------------------------------------------------------------
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_Cue :: Prism' ByteString Noun
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_Cue = prism' jamBS (eitherToMaybe . cueBS)
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where
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eitherToMaybe (Left _) = Nothing
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eitherToMaybe (Right x) = Just x
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data LoadErr = CueErr DecodeErr
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| ParseErr [Text] Text
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deriving (Eq, Ord, Show)
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loadFile :: ∀a. FromNoun a => FilePath -> IO (Either LoadErr a)
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loadFile pax = do
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bs <- readFile pax
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case cueBS bs of
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Left e -> pure $ Left (CueErr e)
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Right n -> case fromNounErr n of
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Left (p,e) -> pure $ Left (ParseErr p e)
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Right x -> pure $ Right x
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