Tidy up rebindable syntax for MDo

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

diff --git a/compiler/hsSyn/HsUtils.lhs b/compiler/hsSyn/HsUtils.lhs
index f01fb6e..d17f850 100644 (file)
--- a/compiler/hsSyn/HsUtils.lhs
+++ b/compiler/hsSyn/HsUtils.lhs
@@ -18,7 +18,7 @@ module HsUtils(
   -- Terms
   mkHsPar, mkHsApp, mkHsConApp, mkSimpleHsAlt,
   mkSimpleMatch, unguardedGRHSs, unguardedRHS, 
-  mkMatchGroup, mkMatch, mkHsLam,
+  mkMatchGroup, mkMatch, mkHsLam, mkHsIf,
   mkHsWrap, mkLHsWrap, mkHsWrapCoI, mkLHsWrapCoI,
   coiToHsWrapper, mkHsDictLet,
   mkHsOpApp, mkHsDo, mkHsWrapPat, mkHsWrapPatCoI,
@@ -28,7 +28,7 @@ module HsUtils(
   mkLHsTupleExpr, mkLHsVarTuple, missingTupArg,
 
   -- Bindigns
-  mkFunBind, mkVarBind, mkHsVarBind, mk_easy_FunBind, mk_FunBind,
+  mkFunBind, mkVarBind, mkHsVarBind, mk_easy_FunBind, 
 
   -- Literals
   mkHsIntegral, mkHsFractional, mkHsIsString, mkHsString, 
@@ -81,7 +81,6 @@ import NameSet
 import BasicTypes
 import SrcLoc
 import FastString
-import Outputable
 import Util
 import Bag
 \end{code}
@@ -206,6 +205,9 @@ noRebindableInfo = error "noRebindableInfo"         -- Just another placeholder;
 
 mkHsDo ctxt stmts body = HsDo ctxt stmts body placeHolderType
 
+mkHsIf :: LHsExpr id -> LHsExpr id -> LHsExpr id -> HsExpr id
+mkHsIf c a b = HsIf (Just noSyntaxExpr) c a b
+
 mkNPat lit neg     = NPat lit neg noSyntaxExpr
 mkNPlusKPat id lit = NPlusKPat id lit noSyntaxExpr noSyntaxExpr
 
@@ -226,7 +228,7 @@ mkBindStmt pat expr = BindStmt pat expr noSyntaxExpr noSyntaxExpr
 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 = emptyTcEvBinds }
+                       , recS_rec_rets = [] }
 
 mkRecStmt stmts = emptyRecStmt { recS_stmts = stmts }
 
@@ -330,7 +332,7 @@ nlList   :: [LHsExpr id] -> LHsExpr id
 
 nlHsLam        match           = noLoc (HsLam (mkMatchGroup [match]))
 nlHsPar e              = noLoc (HsPar e)
-nlHsIf cond true false = noLoc (HsIf cond true false)
+nlHsIf cond true false = noLoc (mkHsIf cond true false)
 nlHsCase expr matches  = noLoc (HsCase expr (mkMatchGroup matches))
 nlList exprs           = noLoc (ExplicitList placeHolderType exprs)
 
@@ -394,17 +396,6 @@ mk_easy_FunBind loc fun pats expr
   = L loc $ mkFunBind (L loc fun) [mkMatch pats expr emptyLocalBinds]
 
 ------------
-mk_FunBind :: SrcSpan -> id
-          -> [([LPat id], LHsExpr id)]
-          -> LHsBind id
-
-mk_FunBind _   _   [] = panic "TcGenDeriv:mk_FunBind"
-mk_FunBind loc fun pats_and_exprs
-  = L loc $ mkFunBind (L loc fun) matches
-  where
-    matches = [mkMatch p e emptyLocalBinds | (p,e) <-pats_and_exprs]
-
-------------
 mkMatch :: [LPat id] -> LHsExpr id -> HsLocalBinds id -> LMatch id
 mkMatch pats expr binds
   = noLoc (Match (map paren pats) Nothing 
@@ -517,8 +508,6 @@ collect_lpat (L _ pat) bndrs
   = go pat
   where
     go (VarPat var)              = var : bndrs
-    go (VarPatOut var _)         = var : bndrs
-       -- See Note [Dictionary binders in ConPatOut]
     go (WildPat _)               = bndrs
     go (LazyPat pat)             = collect_lpat pat bndrs
     go (BangPat pat)             = collect_lpat pat bndrs