Add transitional rules for the alternative layout rule

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

diff --git a/compiler/hsSyn/HsUtils.lhs b/compiler/hsSyn/HsUtils.lhs
index 667f8cc..14193e0 100644 (file)
--- a/compiler/hsSyn/HsUtils.lhs
+++ b/compiler/hsSyn/HsUtils.lhs
@@ -1,3 +1,4 @@
+
 %
 % (c) The University of Glasgow, 1992-2006
 %
@@ -27,6 +28,7 @@ import Coercion
 import Type
 import DataCon
 import Name
+import NameSet
 import BasicTypes
 import SrcLoc
 import FastString
@@ -139,7 +141,9 @@ mkGroupByUsingStmt :: [LStmt idL] -> LHsExpr idR -> LHsExpr idR -> StmtLR idL id
 
 mkExprStmt :: LHsExpr idR -> StmtLR idL idR
 mkBindStmt :: LPat idL -> LHsExpr idR -> StmtLR idL idR
-mkRecStmt  :: [LStmtLR idL idR] -> StmtLR idL idR
+
+emptyRecStmt :: StmtLR idL idR
+mkRecStmt    :: [LStmtLR idL idR] -> StmtLR idL idR
 
 
 mkHsIntegral   i       = OverLit (HsIntegral   i)  noRebindableInfo noSyntaxExpr
@@ -163,7 +167,13 @@ mkGroupByUsingStmt stmts byExpr usingExpr = GroupStmt (stmts, []) (GroupBySometh
 
 mkExprStmt expr            = ExprStmt expr noSyntaxExpr placeHolderType
 mkBindStmt pat expr = BindStmt pat expr noSyntaxExpr noSyntaxExpr
-mkRecStmt stmts            = RecStmt stmts [] [] [] emptyLHsBinds
+
+emptyRecStmt = RecStmt { recS_stmts = [], recS_later_ids = [], recS_rec_ids = []
+                       , recS_ret_fn = noSyntaxExpr, recS_mfix_fn = noSyntaxExpr
+                      , recS_bind_fn = noSyntaxExpr
+                       , recS_rec_rets = [], recS_dicts = emptyLHsBinds }
+
+mkRecStmt stmts = emptyRecStmt { recS_stmts = stmts }
 
 -------------------------------
 --- A useful function for building @OpApps@.  The operator is always a
@@ -174,13 +184,16 @@ mkHsOpApp e1 op e2 = OpApp e1 (noLoc (HsVar op)) (error "mkOpApp:fixity") e2
 mkHsSplice :: LHsExpr RdrName -> HsSplice RdrName
 mkHsSplice e = HsSplice unqualSplice e
 
+mkHsSpliceTy :: LHsExpr RdrName -> HsType RdrName
+mkHsSpliceTy e = HsSpliceTy (mkHsSplice e) emptyFVs placeHolderKind
+
 unqualSplice :: RdrName
 unqualSplice = mkRdrUnqual (mkVarOccFS (fsLit "splice"))
                -- A name (uniquified later) to
                -- identify the splice
 
 mkHsQuasiQuote :: RdrName -> SrcSpan -> FastString -> HsQuasiQuote RdrName
-mkHsQuasiQuote quoter span quote = HsQuasiQuote unqualQuasiQuote quoter span quote
+mkHsQuasiQuote quoter span quote = HsQuasiQuote quoter span quote
 
 unqualQuasiQuote :: RdrName
 unqualQuasiQuote = mkRdrUnqual (mkVarOccFS (fsLit "quasiquote"))
@@ -192,7 +205,7 @@ mkHsString s = HsString (mkFastString s)
 
 -------------
 userHsTyVarBndrs :: [Located name] -> [Located (HsTyVarBndr name)]
-userHsTyVarBndrs bndrs = [ L loc (UserTyVar v) | L loc v <- bndrs ]
+userHsTyVarBndrs bndrs = [ L loc (UserTyVar v placeHolderKind) | L loc v <- bndrs ]
 \end{code}
 
 
@@ -311,8 +324,12 @@ mkFunBind fn ms = FunBind { fun_id = fn, fun_infix = False, fun_matches = mkMatc
                            fun_tick = Nothing }
 
 
-mkVarBind :: SrcSpan -> id -> LHsExpr id -> LHsBind id
-mkVarBind loc var rhs = mk_easy_FunBind loc var [] rhs
+mkHsVarBind :: SrcSpan -> id -> LHsExpr id -> LHsBind id
+mkHsVarBind loc var rhs = mk_easy_FunBind loc var [] rhs
+
+mkVarBind :: id -> LHsExpr id -> LHsBind id
+mkVarBind var rhs = L (getLoc rhs) $
+                   VarBind { var_id = var, var_rhs = rhs, var_inline = False }
 
 ------------
 mk_easy_FunBind :: SrcSpan -> id -> [LPat id]
@@ -338,9 +355,8 @@ mkMatch pats expr binds
   = noLoc (Match (map paren pats) Nothing 
                 (GRHSs (unguardedRHS expr) binds))
   where
-    paren p = case p of
-               L _ (VarPat _) -> p
-               L l _          -> L l (ParPat p)
+    paren lp@(L l p) | hsPatNeedsParens p = L l (ParPat lp) 
+                    | otherwise          = lp
 \end{code}
 
 
@@ -415,8 +431,8 @@ collectStmtBinders (ExprStmt _ _ _)     = []
 collectStmtBinders (ParStmt xs)         = collectLStmtsBinders
                                         $ concatMap fst xs
 collectStmtBinders (TransformStmt (stmts, _) _ _) = collectLStmtsBinders stmts
-collectStmtBinders (GroupStmt (stmts, _) _)     = collectLStmtsBinders stmts
-collectStmtBinders (RecStmt ss _ _ _ _) = collectLStmtsBinders ss
+collectStmtBinders (GroupStmt (stmts, _) _)       = collectLStmtsBinders stmts
+collectStmtBinders (RecStmt { recS_stmts = ss })  = collectLStmtsBinders ss
 \end{code}