module HsDumpAst (
showAstData,
BlankSrcSpan(..),
) where
import Data.Data hiding (Fixity)
import Data.List
import Bag
import BasicTypes
import FastString
import NameSet
import Name
import RdrName
import DataCon
import SrcLoc
import HsSyn
import OccName hiding (occName)
import Var
import Module
import DynFlags
import Outputable hiding (space)
import qualified Data.ByteString as B
data BlankSrcSpan = BlankSrcSpan | NoBlankSrcSpan
deriving (Eq,Show)
showAstData :: Data a => BlankSrcSpan -> a -> String
showAstData b = showAstData' 0
where
showAstData' :: Data a => Int -> a -> String
showAstData' n =
generic
`ext1Q` list
`extQ` string `extQ` fastString `extQ` srcSpan `extQ` lit
`extQ` bytestring
`extQ` name `extQ` occName `extQ` moduleName `extQ` var
`extQ` dataCon
`extQ` bagName `extQ` bagRdrName `extQ` bagVar `extQ` nameSet
`extQ` fixity
`ext2Q` located
where generic :: Data a => a -> String
generic t = indent n ++ "(" ++ showConstr (toConstr t)
++ space (unwords (gmapQ (showAstData' (n+1)) t)) ++ ")"
space "" = ""
space s = ' ':s
indent i = "\n" ++ replicate i ' '
string :: String -> String
string = normalize_newlines . show
fastString :: FastString -> String
fastString = ("{FastString: "++) . (++"}") . normalize_newlines
. show
bytestring :: B.ByteString -> String
bytestring = normalize_newlines . show
list l = indent n ++ "["
++ intercalate "," (map (showAstData' (n+1)) l)
++ "]"
lit :: HsLit -> String
lit (HsWordPrim s x) = numericLit "HsWord{64}Prim" x s
lit (HsWord64Prim s x) = numericLit "HsWord{64}Prim" x s
lit (HsIntPrim s x) = numericLit "HsInt{64}Prim" x s
lit (HsInt64Prim s x) = numericLit "HsInt{64}Prim" x s
lit l = generic l
numericLit :: String -> Integer -> SourceText -> String
numericLit tag x s = indent n ++ unwords [ "{" ++ tag
, generic x
, generic s ++ "}" ]
name :: Name -> String
name = ("{Name: "++) . (++"}") . showSDocDebug_ . ppr
occName = ("{OccName: "++) . (++"}") . OccName.occNameString
moduleName :: ModuleName -> String
moduleName = ("{ModuleName: "++) . (++"}") . showSDoc_ . ppr
srcSpan :: SrcSpan -> String
srcSpan ss = case b of
BlankSrcSpan -> "{ "++ "ss" ++"}"
NoBlankSrcSpan ->
"{ "++ showSDoc_ (hang (ppr ss) (n+2)
(text "")
)
++"}"
var :: Var -> String
var = ("{Var: "++) . (++"}") . showSDocDebug_ . ppr
dataCon :: DataCon -> String
dataCon = ("{DataCon: "++) . (++"}") . showSDoc_ . ppr
bagRdrName:: Bag (Located (HsBind RdrName)) -> String
bagRdrName = ("{Bag(Located (HsBind RdrName)): "++) . (++"}")
. list . bagToList
bagName :: Bag (Located (HsBind Name)) -> String
bagName = ("{Bag(Located (HsBind Name)): "++) . (++"}")
. list . bagToList
bagVar :: Bag (Located (HsBind Var)) -> String
bagVar = ("{Bag(Located (HsBind Var)): "++) . (++"}")
. list . bagToList
nameSet = ("{NameSet: "++) . (++"}") . list . nameSetElemsStable
fixity :: Fixity -> String
fixity = ("{Fixity: "++) . (++"}") . showSDoc_ . ppr
located :: (Data b,Data loc) => GenLocated loc b -> String
located (L ss a) =
indent n ++ "("
++ case cast ss of
Just (s :: SrcSpan) ->
srcSpan s
Nothing -> "nnnnnnnn"
++ showAstData' (n+1) a
++ ")"
normalize_newlines :: String -> String
normalize_newlines ('\\':'r':'\\':'n':xs) = '\\':'n':normalize_newlines xs
normalize_newlines (x:xs) = x:normalize_newlines xs
normalize_newlines [] = []
showSDoc_ :: SDoc -> String
showSDoc_ = normalize_newlines . showSDoc unsafeGlobalDynFlags
showSDocDebug_ :: SDoc -> String
showSDocDebug_ = normalize_newlines . showSDocDebug unsafeGlobalDynFlags
newtype Q q x = Q { unQ :: x -> q }
extQ :: ( Typeable a
, Typeable b
)
=> (a -> q)
-> (b -> q)
-> a
-> q
extQ f g a = maybe (f a) g (cast a)
ext1Q :: (Data d, Typeable t)
=> (d -> q)
-> (forall e. Data e => t e -> q)
-> d -> q
ext1Q def ext = unQ ((Q def) `ext1` (Q ext))
ext2Q :: (Data d, Typeable t)
=> (d -> q)
-> (forall d1 d2. (Data d1, Data d2) => t d1 d2 -> q)
-> d -> q
ext2Q def ext = unQ ((Q def) `ext2` (Q ext))
ext1 :: (Data a, Typeable t)
=> c a
-> (forall d. Data d => c (t d))
-> c a
ext1 def ext = maybe def id (dataCast1 ext)
ext2 :: (Data a, Typeable t)
=> c a
-> (forall d1 d2. (Data d1, Data d2) => c (t d1 d2))
-> c a
ext2 def ext = maybe def id (dataCast2 ext)