-- 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/CodingStyle#Warnings
+-- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
-- for details
module DsMeta( dsBracket,
templateHaskellNames, qTyConName, nameTyConName,
- liftName, expQTyConName, decQTyConName, typeQTyConName,
- decTyConName, typeTyConName, mkNameG_dName, mkNameG_vName, mkNameG_tcName
+ liftName, expQTyConName, patQTyConName, decQTyConName, typeQTyConName,
+ decTyConName, typeTyConName, mkNameG_dName, mkNameG_vName, mkNameG_tcName,
+ quoteExpName, quotePatName
) where
#include "HsVersions.h"
repTy (HsTyVar n)
| isTvOcc (nameOccName n) = do
- tv1 <- lookupBinder n
+ tv1 <- lookupTvOcc n
repTvar tv1
| otherwise = do
tc1 <- lookupOcc n
do { xs <- repLPs ps; body <- repLE e; repLam xs body })
; wrapGenSyns ss lam }
-repLambda (L _ m) = notHandled "Guarded labmdas" (pprMatch LambdaExpr m)
+repLambda (L _ m) = notHandled "Guarded labmdas" (pprMatch (LambdaExpr :: HsMatchContext Name) m)
-----------------------------------------------------------------------------
p2' <- repLP p2;
repPinfix p1' con_str p2' }
}
-repP (NPat l Nothing _ _) = do { a <- repOverloadedLiteral l; repPlit a }
-repP p@(NPat l (Just _) _ _) = notHandled "Negative overloaded patterns" (ppr p)
+repP (NPat l Nothing _) = do { a <- repOverloadedLiteral l; repPlit a }
+repP p@(NPat l (Just _) _) = notHandled "Negative overloaded patterns" (ppr p)
repP p@(SigPatIn {}) = notHandled "Type signatures in patterns" (ppr p)
-- The problem is to do with scoped type variables.
-- To implement them, we have to implement the scoping rules
Just (Splice _) -> pprPanic "repE:lookupOcc" (ppr n)
}
+lookupTvOcc :: Name -> DsM (Core TH.Name)
+-- Type variables can't be staged and are not lexically scoped in TH
+lookupTvOcc n
+ = do { mb_val <- dsLookupMetaEnv n ;
+ case mb_val of
+ Just (Bound x) -> return (coreVar x)
+ other -> failWithDs msg
+ }
+ where
+ msg = vcat [ ptext SLIT("Illegal lexically-scoped type variable") <+> quotes (ppr n)
+ , ptext SLIT("Lexically scoped type variables are not supported by Template Haskell") ]
+
globalVar :: Name -> DsM (Core TH.Name)
-- Not bound by the meta-env
-- Could be top-level; or could be local
return $ HsString s
repOverloadedLiteral :: HsOverLit Name -> DsM (Core TH.Lit)
-repOverloadedLiteral (HsIntegral i _) = do { lit <- mk_integer i; repLiteral lit }
-repOverloadedLiteral (HsFractional f _) = do { lit <- mk_rational f; repLiteral lit }
-repOverloadedLiteral (HsIsString s _) = do { lit <- mk_string s; repLiteral lit }
+repOverloadedLiteral (HsIntegral i _ _) = do { lit <- mk_integer i; repLiteral lit }
+repOverloadedLiteral (HsFractional f _ _) = do { lit <- mk_rational f; repLiteral lit }
+repOverloadedLiteral (HsIsString s _ _) = do { lit <- mk_string s; repLiteral lit }
-- The type Rational will be in the environment, becuase
-- the smart constructor 'TH.Syntax.rationalL' uses it in its type,
-- and rationalL is sucked in when any TH stuff is used
decQTyConName, conQTyConName, strictTypeQTyConName,
varStrictTypeQTyConName, typeQTyConName, expTyConName, decTyConName,
typeTyConName, matchTyConName, clauseTyConName, patQTyConName,
- fieldPatQTyConName, fieldExpQTyConName, funDepTyConName]
+ fieldPatQTyConName, fieldExpQTyConName, funDepTyConName,
+
+ -- Quasiquoting
+ quoteExpName, quotePatName]
thSyn :: Module
thSyn = mkTHModule FSLIT("Language.Haskell.TH.Syntax")
thLib = mkTHModule FSLIT("Language.Haskell.TH.Lib")
+qqLib = mkTHModule FSLIT("Language.Haskell.TH.Quote")
mkTHModule m = mkModule thPackageId (mkModuleNameFS m)
libTc = mk_known_key_name OccName.tcName thLib
thFun = mk_known_key_name OccName.varName thSyn
thTc = mk_known_key_name OccName.tcName thSyn
+qqFun = mk_known_key_name OccName.varName qqLib
-------------------- TH.Syntax -----------------------
qTyConName = thTc FSLIT("Q") qTyConKey
patQTyConName = libTc FSLIT("PatQ") patQTyConKey
fieldPatQTyConName = libTc FSLIT("FieldPatQ") fieldPatQTyConKey
+-- quasiquoting
+quoteExpName = qqFun FSLIT("quoteExp") quoteExpKey
+quotePatName = qqFun FSLIT("quotePat") quotePatKey
+
-- TyConUniques available: 100-129
-- Check in PrelNames if you want to change this
-- data FunDep = ...
funDepIdKey = mkPreludeMiscIdUnique 320
+-- quasiquoting
+quoteExpKey = mkPreludeMiscIdUnique 321
+quotePatKey = mkPreludeMiscIdUnique 322
+