decl2.c (finish_static_data_member_decl): Diagnose static data member in unnamed class.

	* decl2.c (finish_static_data_member_decl): Diagnose static data
	member in unnamed class.

From-SVN: r208156

gcc/cp/ChangeLog

 2014-02-25  Jason Merrill  <jason@redhat.com>
 
+	* decl2.c (finish_static_data_member_decl): Diagnose static data
+	member in unnamed class.
+	* class.c (finish_struct_anon_r): Avoid redundant diagnostic.
+
 	PR lto/53808
 	* class.c (clone_function_decl): Call note_vague_linkage_fn for
 	defaulted virtual dtor.

gcc/cp/class.c

@@ -2851,7 +2851,9 @@ finish_struct_anon_r (tree field, bool complain)
 
       if (TREE_CODE (elt) != FIELD_DECL)
 	{
-	  if (complain)
+	  /* We already complained about static data members in
+	     finish_static_data_member_decl.  */
+	  if (complain && TREE_CODE (elt) != VAR_DECL)
 	    {
 	      if (is_union)
 		permerror (input_location,

gcc/cp/decl2.c

@@ -802,6 +802,17 @@ finish_static_data_member_decl (tree decl,
       && !DECL_TEMPLATE_INSTANTIATION (decl))
     permerror (input_location, "local class %q#T shall not have static data member %q#D",
 	       current_class_type, decl);
+  else
+    for (tree t = current_class_type; TYPE_P (t);
+	 t = CP_TYPE_CONTEXT (t))
+      if (TYPE_ANONYMOUS_P (t))
+	{
+	  if (permerror (DECL_SOURCE_LOCATION (decl),
+			 "static data member %qD in unnamed class", decl))
+	    inform (DECL_SOURCE_LOCATION (TYPE_NAME (t)),
+		    "unnamed class defined here");
+	  break;
+	}
 
   DECL_IN_AGGR_P (decl) = 1;
 

gcc/testsuite/g++.dg/ext/anon-struct5.C

@@ -2,12 +2,12 @@
 
 struct A
 {
-  struct { static int i; }; // { dg-error "prohibits anonymous structs|an anonymous struct" }
+  struct { static int i; }; // { dg-error "prohibits anonymous structs|an anonymous struct|unnamed class" }
   void foo() { i; }
 };
 
 struct B
 {
-  union { static int i; }; // { dg-error "an anonymous union|member of a union" }
+  union { static int i; }; // { dg-error "an anonymous union|member of a union|unnamed class" }
   void foo() { i; }
 };

gcc/testsuite/g++.dg/ext/anon-struct6.C

@@ -4,7 +4,7 @@ struct A
 {
   struct
   {  // { dg-error "anonymous struct cannot have function members" }
-    struct { static int i; }; // { dg-error "prohibits anonymous structs|non-static data members" } 
+    struct { static int i; }; // { dg-error "prohibits anonymous structs|non-static data members|unnamed class" }
     void foo() { i; }
   }; // { dg-error "prohibits anonymous structs" }
 };

gcc/testsuite/g++.dg/parse/unnamed1.C

+// 9.4.2/4: Unnamed classes and classes contained directly or indirectly
+// within unnamed classes shall not contain static data members.
+
+typedef struct {		// { dg-message "unnamed" }
+  static int i;			// { dg-error "static data member" }
+} A;