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{-
this test file was extracted from Text.Pandoc.Readers.Odt.ContentReader,
which caused a panic in GHC.Tc.Class.Instance.hasFixedRuntimeRep:
error: panic! (the 'impossible' happened)
hasFixedRuntimeRep: not of form 'TYPE rep'
ty = c_anCXp[tau:0]
ki = k_anCXl[tau:0]
frrOrig = The arrow command `returnA -< anchorElem_anC3K'
does not have a fixed runtime representation.
-}
{-# LANGUAGE Arrows #-}
{-# OPTIONS_GHC -Wno-missing-methods #-}
module PandocArrowCmd where
import Control.Arrow
import Control.Category
maybeAddAnchorFrom :: OdtReader i p
-> OdtReaderSafe i i
maybeAddAnchorFrom anchorReader =
keepingTheValue_etc_etc
>>>
proc (inlines, fAnchorElem) -> do
case fAnchorElem of
Right anchorElem -> returnA -< anchorElem
Left _ -> returnA -< inlines
-----
keepingTheValue_etc_etc :: OdtReader i (b, Either a b)
keepingTheValue_etc_etc = undefined
data OdtState
type OdtReader a b = ArrowState OdtState a b
type OdtReaderSafe a b = ArrowState OdtState a (Either () b)
newtype ArrowState state a b = ArrowState
{ runArrowState :: (state, a) -> (state, b) }
instance Category (ArrowState s) where {}
instance Arrow (ArrowState s) where {}
instance ArrowChoice (ArrowState s) where {}
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