Add quasi-quotation, courtesy of Geoffrey Mainland

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

diff --git a/compiler/hsSyn/Convert.lhs b/compiler/hsSyn/Convert.lhs
index 4ed7364..96b5fc1 100644 (file)
--- a/compiler/hsSyn/Convert.lhs
+++ b/compiler/hsSyn/Convert.lhs
@@ -6,7 +6,14 @@
 This module converts Template Haskell syntax into HsSyn
 
 \begin{code}
-module Convert( convertToHsExpr, convertToHsDecls, 
+{-# OPTIONS -w #-}
+-- 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
+
+module Convert( convertToHsExpr, convertToPat, convertToHsDecls,
                 convertToHsType, thRdrName ) where
 
 #include "HsVersions.h"
@@ -51,6 +58,13 @@ convertToHsExpr loc e
                                    <+> text (show e)))
        Right res -> Right res
 
+convertToPat :: SrcSpan -> TH.Pat -> Either Message (LPat RdrName)
+convertToPat loc e
+  = case initCvt loc (cvtPat e) of
+        Left msg  -> Left (msg $$ (ptext SLIT("When converting TH pattern")
+                                    <+> text (show e)))
+        Right res -> Right res
+
 convertToHsType :: SrcSpan -> TH.Type -> Either Message (LHsType RdrName)
 convertToHsType loc t = initCvt loc (cvtType t)
 
@@ -185,9 +199,10 @@ cvtConstr (ForallC tvs ctxt con)
 cvt_arg (IsStrict, ty)  = do { ty' <- cvtType ty; returnL $ HsBangTy HsStrict ty' }
 cvt_arg (NotStrict, ty) = cvtType ty
 
-cvt_id_arg (i, str, ty) = do { i' <- vNameL i
-                            ; ty' <- cvt_arg (str,ty)
-                            ; return (mkRecField i' ty') }
+cvt_id_arg (i, str, ty) 
+  = do { i' <- vNameL i
+       ; ty' <- cvt_arg (str,ty)
+       ; return (ConDeclField { cd_fld_name = i', cd_fld_type =  ty', cd_fld_doc = Nothing}) }
 
 cvtDerivs [] = return Nothing
 cvtDerivs cs = do { cs' <- mapM cvt_one cs
@@ -364,12 +379,14 @@ cvtl e = wrapL (cvt e)
                              ; return $ ExprWithTySig e' t' }
     cvt (RecConE c flds) = do { c' <- cNameL c
                              ; flds' <- mapM cvtFld flds
-                             ; return $ RecordCon c' noPostTcExpr (HsRecordBinds flds') }
+                             ; return $ RecordCon c' noPostTcExpr (HsRecFields flds' Nothing)}
     cvt (RecUpdE e flds) = do { e' <- cvtl e
                              ; flds' <- mapM cvtFld flds
-                             ; return $ RecordUpd e' (HsRecordBinds flds') placeHolderType placeHolderType }
+                             ; return $ RecordUpd e' (HsRecFields flds' Nothing) [] [] [] }
 
-cvtFld (v,e) = do { v' <- vNameL v; e' <- cvtl e; return (v',e') }
+cvtFld (v,e) 
+  = do { v' <- vNameL v; e' <- cvtl e
+       ; return (HsRecField { hsRecFieldId = v', hsRecFieldArg = e', hsRecPun = False}) }
 
 cvtDD :: Range -> CvtM (ArithSeqInfo RdrName)
 cvtDD (FromR x)          = do { x' <- cvtl x; return $ From x' }
@@ -410,15 +427,15 @@ cvtGuard (NormalB e)      = do { e' <- cvtl e; g' <- returnL $ GRHS [] e'; retur
 
 cvtpair :: (TH.Guard, TH.Exp) -> CvtM (LGRHS RdrName)
 cvtpair (NormalG ge,rhs) = do { ge' <- cvtl ge; rhs' <- cvtl rhs
-                             ; g' <- returnL $ mkBindStmt truePat ge'
+                             ; g' <- returnL $ mkExprStmt ge'
                              ; returnL $ GRHS [g'] rhs' }
 cvtpair (PatG gs,rhs)    = do { gs' <- cvtStmts gs; rhs' <- cvtl rhs
                              ; returnL $ GRHS gs' rhs' }
 
 cvtOverLit :: Lit -> CvtM (HsOverLit RdrName)
-cvtOverLit (IntegerL i)  = do { force i; return $ mkHsIntegral i }
-cvtOverLit (RationalL r) = do { force r; return $ mkHsFractional r }
-cvtOverLit (StringL s)   = do { let { s' = mkFastString s }; force s'; return $ mkHsIsString s' }
+cvtOverLit (IntegerL i)  = do { force i; return $ mkHsIntegral i placeHolderType}
+cvtOverLit (RationalL r) = do { force r; return $ mkHsFractional r placeHolderType}
+cvtOverLit (StringL s)   = do { let { s' = mkFastString s }; force s'; return $ mkHsIsString s' placeHolderType }
 -- An Integer is like an an (overloaded) '3' in a Haskell source program
 -- Similarly 3.5 for fractionals
 
@@ -452,11 +469,13 @@ cvtp (TildeP p)       = do { p' <- cvtPat p; return $ LazyPat p' }
 cvtp (TH.AsP s p)     = do { s' <- vNameL s; p' <- cvtPat p; return $ AsPat s' p' }
 cvtp TH.WildP         = return $ WildPat void
 cvtp (RecP c fs)      = do { c' <- cNameL c; fs' <- mapM cvtPatFld fs 
-                          ; return $ ConPatIn c' $ Hs.RecCon fs' }
+                          ; return $ ConPatIn c' $ Hs.RecCon (HsRecFields fs' Nothing) }
 cvtp (ListP ps)       = do { ps' <- cvtPats ps; return $ ListPat ps' void }
 cvtp (SigP p t)       = do { p' <- cvtPat p; t' <- cvtType t; return $ SigPatIn p' t' }
 
-cvtPatFld (s,p) = do { s' <- vNameL s; p' <- cvtPat p; return (mkRecField s' p') }
+cvtPatFld (s,p)
+  = do { s' <- vNameL s; p' <- cvtPat p
+       ; return (HsRecField { hsRecFieldId = s', hsRecFieldArg = p', hsRecPun = False}) }
 
 -----------------------------------------------------------
 --     Types and type variables
@@ -573,7 +592,7 @@ thRdrName :: OccName.NameSpace -> String -> TH.NameFlavour -> RdrName
 -- 
 -- The strict applications ensure that any buried exceptions get forced
 thRdrName ctxt_ns occ (TH.NameG th_ns pkg mod) = (mkOrig $! (mkModule (mk_pkg pkg) (mk_mod mod))) $! (mk_occ (mk_ghc_ns th_ns) occ)
-thRdrName ctxt_ns occ (TH.NameL uniq)      = nameRdrName $! (((Name.mkInternalName $! (mk_uniq uniq)) $! (mk_occ ctxt_ns occ)) noSrcLoc)
+thRdrName ctxt_ns occ (TH.NameL uniq)      = nameRdrName $! (((Name.mkInternalName $! (mk_uniq uniq)) $! (mk_occ ctxt_ns occ)) noSrcSpan)
 thRdrName ctxt_ns occ (TH.NameQ mod)       = (mkRdrQual  $! (mk_mod mod)) $! (mk_occ ctxt_ns occ)
 thRdrName ctxt_ns occ (TH.NameU uniq)      = mkRdrUnqual $! (mk_uniq_occ ctxt_ns occ uniq)
 thRdrName ctxt_ns occ TH.NameS