re PR c++/28588 (static private function)

re PR c++/28588 (static private function)

	PR c++/28588
	* class.c (resolve_address_of_overloaded_function): Add
	access_path parameter.  Perform access checks.
	(instantiate_type): Adjust call to
	resolve_address_of_overloaded_function.  Remove unnecessary code.
	* tree.c (is_overloaded_fn): Document.  Return 2 when there are
	acutally multiple functions.
	(really_overloaded_fn): Use is_overloaded_fn.
	* mangle.c (write_expression): Handle BASELINKs.
	* cp-tree.h (really_overloaded_fn): Return bool.
	(baselink_for_fns): Declare.
	* search.c (lookup_member): Check access for single static
	functions here.
	* pt.c (convert_nontype_argument_function): Handle BASELINKs.
	(tsubst_copy_and_build): Generate BASELINKs for template-ids.
	* semantics.c (finish_call_expr): Use baselink_for_fns.
	(baselink_for_fns): New function.
	(finish_id_expression): Use it.
	* parser.c (cp_parser_template_argument): Don't strip BASELINKs.
	PR c++/28595
	* pt.c (tsubst): Issue errors about attempts to create VLAs at
	template-instantiation time.
	PR c++/28588
	* g++.dg/inherit/access6.C: New test.
	* g++.dg/inherit/access7.C: Likewise.
	PR c++/28595
	* g++.dg/template/array15.C: New test.
	* g++.dg/template/crash2.C: Tweak error markers.

From-SVN: r116468