--
-- Haddock - A Haskell Documentation Tool
--
-- (c) Simon Marlow 2003
--

{-# OPTIONS_GHC -fno-warn-orphans #-}

module Haddock.GHC.Utils where


import Data.Char
import qualified Data.Map as Map

import GHC
import HsSyn
import SrcLoc
import Outputable
import Name


moduleString :: Module -> String
moduleString = moduleNameString . moduleName 


instance (Outputable a, Outputable b) => Outputable (Map.Map a b) where
  ppr m = ppr (Map.toList m)


isNameSym :: Name -> Bool
isNameSym = isSymOcc . nameOccName


getMainDeclBinder :: HsDecl name -> Maybe name
getMainDeclBinder (TyClD d) = Just (tcdName d)
getMainDeclBinder (ValD d)
   = case collectAcc d [] of
        []       -> Nothing 
        (name:_) -> Just (unLoc name)
getMainDeclBinder (SigD d) = sigNameNoLoc d
getMainDeclBinder (ForD (ForeignImport name _ _)) = Just (unLoc name)
getMainDeclBinder (ForD (ForeignExport _ _ _)) = Nothing
getMainDeclBinder _ = Nothing


pretty :: Outputable a => a -> String
pretty x = show (ppr x defaultUserStyle)


trace_ppr :: Outputable a => a -> b -> b
trace_ppr x y = trace (showSDoc (ppr x)) y