class.c (handle_using_decl): Reject using of constructor name of sourcing class.

cp:
	* class.c (handle_using_decl): Reject using of constructor name
	of sourcing class. Allow injecting of a method with same name as
	nested class. Fixup error messages.
testsuite:
	* g++.old_deja/g++.pt/using8.C: New test.

From-SVN: r38831

gcc/cp/ChangeLog

@@ -1,3 +1,9 @@
+2001-01-09  Nathan Sidwell  <nathan@codesourcery.com>
+
+	* class.c (handle_using_decl): Reject using of constructor name
+	of sourcing class. Allow injecting of a method with same name as
+	nested class. Fixup error messages.
+
 2001-01-09  Joseph S. Myers  <jsm28@cam.ac.uk>
 
 	* decl2.c (lang_decode_option): Handle -Wformat=2.

gcc/cp/class.c

@@ -1527,7 +1527,13 @@ handle_using_decl (using_decl, t)
   if (name == constructor_name (ctype)
       || name == constructor_name_full (ctype))
     {
-      cp_error_at ("using-declaration for constructor", using_decl);
+      cp_error_at ("`%D' names constructor", using_decl);
+      return;
+    }
+  if (name == constructor_name (t)
+      || name == constructor_name_full (t))
+    {
+      cp_error_at ("`%D' invalid in `%T'", using_decl, t);
       return;
     }
 
@@ -1567,16 +1573,16 @@ handle_using_decl (using_decl, t)
 	   the same name already present in the current class.  */;
       else
 	{
-	  cp_error ("`%D' invalid in `%#T'", using_decl, t);
+	  cp_error_at ("`%D' invalid in `%#T'", using_decl, t);
 	  cp_error_at ("  because of local method `%#D' with same name",
 		       OVL_CURRENT (old_value));
 	  return;
 	}
     }
-  else
+  else if (!DECL_ARTIFICIAL (old_value))
     {
-      cp_error ("`%D' invalid in `%#T'", using_decl, t);
-      cp_error_at ("  because of local field `%#D' with same name", old_value);
+      cp_error_at ("`%D' invalid in `%#T'", using_decl, t);
+      cp_error_at ("  because of local member `%#D' with same name", old_value);
       return;
     }
   

gcc/testsuite/ChangeLog

@@ -1,3 +1,7 @@
+2001-01-09  Nathan Sidwell  <nathan@codesourcery.com>
+
+	* g++.old_deja/g++.pt/using8.C: New test.
+
 2001-01-09  Joseph S. Myers  <jsm28@cam.ac.uk>
 
 	* gcc.dg/format/attr-2.c, gcc.dg/format/attr-3.c: New tests.

gcc/testsuite/g++.old-deja/g++.other/using8.C

@@ -0,0 +1,43 @@
+// Build don't link:
+
+// Copyright (C) 2000 Free Software Foundation, Inc.
+// Contributed by Nathan Sidwell 14 Nov 2000 <nathan@codesourcery.com>
+
+// We rejected using decls bringing in functions from a base which would hide a
+// nested class of the same name, but only if we had no functions by that name
+// already. Also, we failed to find that using declaration during lookup. Also
+// we failed to reject using declarations which matched the constructor name.
+
+struct A
+{
+  int f ();
+  void D ();
+};
+
+struct A2 {
+  typedef int f;
+};
+
+struct B : A 
+{
+  using A::f;
+  struct f {};
+};
+
+struct C : A 
+{
+  using A::f;
+  int f (int);
+  struct f {};
+};
+
+void foo (B *bp, C* cp)
+{
+  bp->f ();
+  cp->f ();
+}
+
+struct D : A
+{
+  using A::D;   // ERROR - names constructor
+};