Improvements to record puns, wildcards

[ghc-hetmet.git] / compiler / main / DynFlags.hs

diff --git a/compiler/main/DynFlags.hs b/compiler/main/DynFlags.hs
index b0d4300..1969c3b 100644 (file)
--- a/compiler/main/DynFlags.hs
+++ b/compiler/main/DynFlags.hs
@@ -1856,6 +1856,12 @@ impliedFlags
     , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec)  -- Ditto for scoped type variables; see
                                                      --      Note [Scoped tyvars] in TcBinds
     , (Opt_ImpredicativeTypes,  Opt_RankNTypes)
+
+       -- Record wild-cards implies field disambiguation
+       -- Otherwise if you write (C {..}) you may well get
+       -- stuff like " 'a' not in scope ", which is a bit silly
+       -- if the compiler has just filled in field 'a' of constructor 'C'
+    , (Opt_RecordWildCards,     Opt_DisambiguateRecordFields)
   ]
 
 glasgowExtsFlags :: [DynFlag]