-- a Royal Pain (triggers other recompilation).
-----------------------------------------------------------------------------
-{-# OPTIONS -fno-warn-unused-imports #-}
--- The above warning supression flag is a temporary kludge.
--- While working on this module you are encouraged to remove it and fix
--- any warnings in the module. See
--- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
--- for details
--- The kludge is only needed in this module because of trac #2267.
-
module DsMeta( dsBracket,
templateHaskellNames, qTyConName, nameTyConName,
- liftName, expQTyConName, patQTyConName, decQTyConName, typeQTyConName,
+ liftName, liftStringName, expQTyConName, patQTyConName, decQTyConName, typeQTyConName,
decTyConName, typeTyConName, mkNameG_dName, mkNameG_vName, mkNameG_tcName,
quoteExpName, quotePatName
) where
import {-# SOURCE #-} DsExpr ( dsExpr )
import MatchLit
-import DsUtils
import DsMonad
import qualified Language.Haskell.TH as TH
(tvs, cxt, cls, tys) = splitHsInstDeclTy (unLoc ty)
repForD :: Located (ForeignDecl Name) -> DsM (SrcSpan, Core TH.DecQ)
-repForD (L loc (ForeignImport name typ (CImport cc s ch cn cis)))
+repForD (L loc (ForeignImport name typ (CImport cc s ch cis)))
= do MkC name' <- lookupLOcc name
MkC typ' <- repLTy typ
MkC cc' <- repCCallConv cc
cis' <- conv_cimportspec cis
MkC str <- coreStringLit $ static
++ unpackFS ch ++ " "
- ++ unpackFS cn ++ " "
++ cis'
dec <- rep2 forImpDName [cc', s', str, name', typ']
return (loc, dec)
repCCallConv :: CCallConv -> DsM (Core TH.Callconv)
repCCallConv CCallConv = rep2 cCallName []
repCCallConv StdCallConv = rep2 stdCallName []
-repCCallConv CmmCallConv = notHandled "repCCallConv" (ppr CmmCallConv)
+repCCallConv callConv = notHandled "repCCallConv" (ppr callConv)
repSafety :: Safety -> DsM (Core TH.Safety)
repSafety PlayRisky = rep2 unsafeName []
-------------------------------------------------------
repC :: LConDecl Name -> DsM (Core TH.ConQ)
-repC (L _ (ConDecl con _ [] (L _ []) details ResTyH98 _))
+repC (L _ (ConDecl { con_name = con, con_qvars = [], con_cxt = L _ []
+ , con_details = details, con_res = ResTyH98 }))
= do { con1 <- lookupLOcc con -- See note [Binders and occurrences]
; repConstr con1 details
}
-repC (L loc (ConDecl con expl tvs (L cloc ctxt) details ResTyH98 doc))
+repC (L loc con_decl@(ConDecl { con_qvars = tvs, con_cxt = L cloc ctxt, con_res = ResTyH98 }))
= addTyVarBinds tvs $ \bndrs ->
- do { c' <- repC (L loc (ConDecl con expl [] (L cloc []) details
- ResTyH98 doc))
+ do { c' <- repC (L loc (con_decl { con_qvars = [], con_cxt = L cloc [] }))
; ctxt' <- repContext ctxt
; bndrs' <- coreList tyVarBndrTyConName bndrs
; rep2 forallCName [unC bndrs', unC ctxt', unC c']
repTForall bndrs1 ctxt1 ty1
repTy (HsTyVar n)
- | isTvOcc (nameOccName n) = do
- tv1 <- lookupTvOcc n
- repTvar tv1
- | otherwise = do
- tc1 <- lookupOcc n
- repNamedTyCon tc1
-repTy (HsAppTy f a) = do
- f1 <- repLTy f
- a1 <- repLTy a
- repTapp f1 a1
-repTy (HsFunTy f a) = do
- f1 <- repLTy f
- a1 <- repLTy a
- tcon <- repArrowTyCon
- repTapps tcon [f1, a1]
-repTy (HsListTy t) = do
- t1 <- repLTy t
- tcon <- repListTyCon
- repTapp tcon t1
-repTy (HsPArrTy t) = do
- t1 <- repLTy t
- tcon <- repTy (HsTyVar (tyConName parrTyCon))
- repTapp tcon t1
-repTy (HsTupleTy _ tys) = do
- tys1 <- repLTys tys
- tcon <- repTupleTyCon (length tys)
- repTapps tcon tys1
-repTy (HsOpTy ty1 n ty2) = repLTy ((nlHsTyVar (unLoc n) `nlHsAppTy` ty1)
- `nlHsAppTy` ty2)
-repTy (HsParTy t) = repLTy t
-repTy (HsPredTy pred) = repPredTy pred
-repTy (HsKindSig t k) = do
- t1 <- repLTy t
- k1 <- repKind k
- repTSig t1 k1
-repTy ty@(HsNumTy _) = notHandled "Number types (for generics)" (ppr ty)
-repTy ty = notHandled "Exotic form of type" (ppr ty)
+ | isTvOcc (nameOccName n) = do
+ tv1 <- lookupTvOcc n
+ repTvar tv1
+ | otherwise = do
+ tc1 <- lookupOcc n
+ repNamedTyCon tc1
+repTy (HsAppTy f a) = do
+ f1 <- repLTy f
+ a1 <- repLTy a
+ repTapp f1 a1
+repTy (HsFunTy f a) = do
+ f1 <- repLTy f
+ a1 <- repLTy a
+ tcon <- repArrowTyCon
+ repTapps tcon [f1, a1]
+repTy (HsListTy t) = do
+ t1 <- repLTy t
+ tcon <- repListTyCon
+ repTapp tcon t1
+repTy (HsPArrTy t) = do
+ t1 <- repLTy t
+ tcon <- repTy (HsTyVar (tyConName parrTyCon))
+ repTapp tcon t1
+repTy (HsTupleTy _ tys) = do
+ tys1 <- repLTys tys
+ tcon <- repTupleTyCon (length tys)
+ repTapps tcon tys1
+repTy (HsOpTy ty1 n ty2) = repLTy ((nlHsTyVar (unLoc n) `nlHsAppTy` ty1)
+ `nlHsAppTy` ty2)
+repTy (HsParTy t) = repLTy t
+repTy (HsPredTy pred) = repPredTy pred
+repTy (HsKindSig t k) = do
+ t1 <- repLTy t
+ k1 <- repKind k
+ repTSig t1 k1
+repTy (HsSpliceTy splice) = repSplice splice
+repTy ty@(HsNumTy _) = notHandled "Number types (for generics)" (ppr ty)
+repTy ty = notHandled "Exotic form of type" (ppr ty)
-- represent a kind
--
(ppr k)
-----------------------------------------------------------------------------
+-- Splices
+-----------------------------------------------------------------------------
+
+repSplice :: HsSplice Name -> DsM (Core a)
+-- See Note [How brackets and nested splices are handled] in TcSplice
+-- We return a CoreExpr of any old type; the context should know
+repSplice (HsSplice n _)
+ = do { mb_val <- dsLookupMetaEnv n
+ ; case mb_val of
+ Just (Splice e) -> do { e' <- dsExpr e
+ ; return (MkC e') }
+ _ -> pprPanic "HsSplice" (ppr n) }
+ -- Should not happen; statically checked
+
+-----------------------------------------------------------------------------
-- Expressions
-----------------------------------------------------------------------------
repE (ExplicitList _ es) = do { xs <- repLEs es; repListExp xs }
repE e@(ExplicitPArr _ _) = notHandled "Parallel arrays" (ppr e)
repE e@(ExplicitTuple es boxed)
- | isBoxed boxed = do { xs <- repLEs es; repTup xs }
- | otherwise = notHandled "Unboxed tuples" (ppr e)
+ | not (isBoxed boxed) = notHandled "Unboxed tuples" (ppr e)
+ | not (all tupArgPresent es) = notHandled "Tuple sections" (ppr e)
+ | otherwise = do { xs <- repLEs [e | Present e <- es]; repTup xs }
+
repE (RecordCon c _ flds)
= do { x <- lookupLOcc c;
fs <- repFields flds;
ds2 <- repLE e2
ds3 <- repLE e3
repFromThenTo ds1 ds2 ds3
-repE (HsSpliceE (HsSplice n _))
- = do { mb_val <- dsLookupMetaEnv n
- ; case mb_val of
- Just (Splice e) -> do { e' <- dsExpr e
- ; return (MkC e') }
- _ -> pprPanic "HsSplice" (ppr n) }
- -- Should not happen; statically checked
+repE (HsSpliceE splice) = repSplice splice
repE e@(PArrSeq {}) = notHandled "Parallel arrays" (ppr e)
repE e@(HsCoreAnn {}) = notHandled "Core annotations" (ppr e)
repE e@(HsSCC {}) = notHandled "Cost centres" (ppr e)
returnQName, bindQName, sequenceQName, newNameName, liftName,
mkNameName, mkNameG_vName, mkNameG_dName, mkNameG_tcName,
- mkNameLName :: Name
-returnQName = thFun (fsLit "returnQ") returnQIdKey
-bindQName = thFun (fsLit "bindQ") bindQIdKey
-sequenceQName = thFun (fsLit "sequenceQ") sequenceQIdKey
+ mkNameLName, liftStringName :: Name
+returnQName = thFun (fsLit "returnQ") returnQIdKey
+bindQName = thFun (fsLit "bindQ") bindQIdKey
+sequenceQName = thFun (fsLit "sequenceQ") sequenceQIdKey
newNameName = thFun (fsLit "newName") newNameIdKey
-liftName = thFun (fsLit "lift") liftIdKey
+liftName = thFun (fsLit "lift") liftIdKey
+liftStringName = thFun (fsLit "liftString") liftStringIdKey
mkNameName = thFun (fsLit "mkName") mkNameIdKey
mkNameG_vName = thFun (fsLit "mkNameG_v") mkNameG_vIdKey
mkNameG_dName = thFun (fsLit "mkNameG_d") mkNameG_dIdKey
doublePrimLIdKey = mkPreludeMiscIdUnique 216
rationalLIdKey = mkPreludeMiscIdUnique 217
+liftStringIdKey :: Unique
+liftStringIdKey = mkPreludeMiscIdUnique 218
+
-- data Pat = ...
litPIdKey, varPIdKey, tupPIdKey, conPIdKey, infixPIdKey, tildePIdKey, bangPIdKey,
asPIdKey, wildPIdKey, recPIdKey, listPIdKey, sigPIdKey :: Unique
clauseIdKey :: Unique
clauseIdKey = mkPreludeMiscIdUnique 232
+
-- data Exp = ...
varEIdKey, conEIdKey, litEIdKey, appEIdKey, infixEIdKey, infixAppIdKey,
sectionLIdKey, sectionRIdKey, lamEIdKey, tupEIdKey, condEIdKey,