Hi everyone, As we all know, FiniteMap was deprecated, and with GHC-6.6 Data.Map must be used instead. Some function names in Data.Map clash with names in prelude, and Map is usually imported qualified.
Happy generates GLR parsers (-l), but the templates it uses keep calling FiniteMap functions. When Data.Map is imported, it's not imported qualified and some function names are ambiguous. I've been using a modified template to generate a GLR parser with GHC-6.6 and it seems to work just fine (there are few changes, not a big deal anyway). I just got the most recent version of Happy and the problem remains, so I applied my changes to GLR_Lib.lhs and ran a diff. The result is attached to this mail. Hope it helps someone else. Cheers, Ivan. PS. I seem to recall having sent this mail months ago. Couldn't find it, though. In case it's been sent twice, I apologise.
diff -rN old-happy/templates/GLR_Lib.lhs new-happy/templates/GLR_Lib.lhs 46c46 < >import Data.Map --- > >import qualified Data.Map as Map 116a117,119 > #if __GLASGOW_HASKELL__ >= 603 > >type Forest = Map.Map ForestId [Branch] > #else 117a121 > #endif 143a148,150 > #if __GLASGOW_HASKELL__ >= 603 > > ns_map = Map.toList f > #else 144a152 > #endif 153a162,164 > #if __GLASGOW_HASKELL__ >= 603 > > = case runST Map.empty [0..] (tp toks) of > #else 154a166 > #endif 292a305,307 > #if __GLASGOW_HASKELL__ >= 603 > > = chgS $ \f -> ((), Map.insert i [] f) > #else 293a309 > #endif 303a320,325 > #if __GLASGOW_HASKELL__ >= 603 > > case Map.lookup i f of > > Nothing -> chgS $ \f -> (False, Map.insert i [b] f) > > Just bs | b `elem` bs -> return True > > | otherwise -> chgS $ \f -> (True, Map.insert i (b:bs) f) > #else 308c330 < --- > #endif 313a336,338 > #if __GLASGOW_HASKELL__ >= 603 > > = useS $ \s -> Map.findWithDefault no_such_node i s > #else 314a340 > #endif
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