* cp-tree.h (PUSH_GLOBAL): New macro.
	(PUSH_LOCAL): Likewise.
	(PUSH_USING): Likewise.
	(namespace_bindings_p): Declare.
	(push_overloaded_decl): Likewise.
	* decl.c (push_overloaded_decl): Don't make it static.  Check for
	illegal declarations after using declarations here.
	(namespace_bindings_p): Likewise.
	(duplicate_decls): Don't consider declarations from different
	namespaces to be the same.
	(pushdecl): Use symbolic PUSH_ constants in calls to
	push_overloaded_decl.
	(push_overloaded_decl_1): Likewise.
	* decl2.c (validate_nonmember_using_decl): Tweak `std' handling.
	(do_nonmember_using_decl): Check for illegal using declarations
	after ordinary declarations here.
	(do_local_using_decl): Call pushdecl to insert declarations.

From-SVN: r24812