Make TH capable of quoting GADT declarations (Trac #5217)

[ghc-hetmet.git] / compiler / hsSyn / HsTypes.lhs

diff --git a/compiler/hsSyn/HsTypes.lhs b/compiler/hsSyn/HsTypes.lhs
index a5e8982..d565c96 100644 (file)
--- a/compiler/hsSyn/HsTypes.lhs
+++ b/compiler/hsSyn/HsTypes.lhs
@@ -26,6 +26,7 @@ module HsTypes (
        hsTyVarKind, hsTyVarNameKind,
        hsLTyVarName, hsLTyVarNames, hsLTyVarLocName, hsLTyVarLocNames,
        splitHsInstDeclTy, splitHsFunType,
+       splitHsAppTys, mkHsAppTys,
        
        -- Type place holder
        PostTcType, placeHolderType, PostTcKind, placeHolderKind,
@@ -168,8 +169,6 @@ data HsType name
        -- interface files smaller), so when printing a HsType we may need to
        -- add parens.  
 
-  | HsNumTy             Integer                -- Generics only
-
   | HsPredTy           (HsPred name)   -- Only used in the type of an instance
                                        -- declaration, eg.  Eq [a] -> Eq a
                                        --                             ^^^^
@@ -294,6 +293,19 @@ replaceTyVarName (KindedTyVar _ k) n' = KindedTyVar n' k
 
 
 \begin{code}
+splitHsAppTys :: LHsType n -> [LHsType n] -> (LHsType n, [LHsType n])
+splitHsAppTys (L _ (HsAppTy f a)) as = splitHsAppTys f (a:as)
+splitHsAppTys f                  as = (f,as)
+
+mkHsAppTys :: OutputableBndr n => LHsType n -> [LHsType n] -> HsType n
+mkHsAppTys fun_ty [] = pprPanic "mkHsAppTys" (ppr fun_ty)
+mkHsAppTys fun_ty (arg_ty:arg_tys)
+  = foldl mk_app (HsAppTy fun_ty arg_ty) arg_tys
+  where
+    mk_app fun arg = HsAppTy (noLoc fun) arg   
+       -- Add noLocs for inner nodes of the application; 
+       -- they are never used 
+
 splitHsInstDeclTy 
     :: OutputableBndr name
     => HsType name 
@@ -359,8 +371,8 @@ pprHsForAll exp tvs cxt
 pprHsContext :: (OutputableBndr name) => HsContext name -> SDoc
 pprHsContext []                = empty
 pprHsContext [L _ pred] 
-   | noParenHsPred pred = ppr pred <+> ptext (sLit "=>")
-pprHsContext cxt        = ppr_hs_context cxt <+> ptext (sLit "=>")
+   | noParenHsPred pred = ppr pred <+> darrow
+pprHsContext cxt        = ppr_hs_context cxt <+> darrow
 
 noParenHsPred :: HsPred name -> Bool
 -- c.f. TypeRep.noParenPred
@@ -440,7 +452,6 @@ ppr_mono_ty _    (HsKindSig ty kind) = parens (ppr_mono_lty pREC_TOP ty <+> dcol
 ppr_mono_ty _    (HsListTy ty)      = brackets (ppr_mono_lty pREC_TOP ty)
 ppr_mono_ty _    (HsPArrTy ty)      = pabrackets (ppr_mono_lty pREC_TOP ty)
 ppr_mono_ty _    (HsPredTy pred)     = ppr pred
-ppr_mono_ty _    (HsNumTy n)         = integer n  -- generics only
 ppr_mono_ty _    (HsSpliceTy s _ _)  = pprSplice s
 ppr_mono_ty _    (HsCoreTy ty)       = ppr ty