[Bug c++/28584] Cast to pointer from integer of different size

["manu at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #2 from manu at gcc dot gnu dot org  2010-02-20 18:19 -------
Jason, do we want this?

It seems trivial:

Index: gcc/cp/typeck.c
===================================================================
--- gcc/cp/typeck.c     (revision 156923)
+++ gcc/cp/typeck.c     (working copy)
@@ -6260,10 +6260,20 @@ cp_build_c_cast (tree type, tree expr, t
       if (complain & tf_error)
         error ("invalid cast to function type %qT", type);
       return error_mark_node;
     }

+
+  if (TREE_CODE (type) == POINTER_TYPE
+      && TREE_CODE (TREE_TYPE (value)) == INTEGER_TYPE
+      && TYPE_PRECISION (type) != TYPE_PRECISION (TREE_TYPE (value))
+      /* Don't warn about converting any constant.  */
+      && !TREE_CONSTANT (value))
+    warning_at (loc,
+               OPT_Wint_to_pointer_cast, "cast to pointer from integer "
+               "of different size");
+
   /* A C-style cast can be a const_cast.  */
   result = build_const_cast_1 (type, value, /*complain=*/false,
                               &valid_p);
   if (valid_p)
     return result;


-- 

manu at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jason at redhat dot com,
                   |                            |manu at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28584