1998-07-31  Mark Mitchell  <mark@markmitchell.com>
	* cp-tree.h (PROCESSING_REAL_TEMPLATE_DECL_P): New macro.
	(maybe_check_template_type): New function.
	* decl.c (maybe_process_template_type_declaration): New function,
	split out from pushtag  Call maybe_check_template_type.
	(pushtag): Use it.  Use PROCESSING_REAL_TEMPLATE_DECL_P.
	(xref_tag): Use PROCESSING_REAL_TEMPLATE_DECL_P.
	* friend.c (do_friend): Use PROCESSING_REAL_TEMPLATE_DECL_P.
	* pt.c (template_class_depth_real): Generalization of ...
	(template_class_depth): Use it.
	(register_specialization): Use duplicate_decls for duplicate
	declarations of specializations.
	(maybe_check_template_type): New function.
	(push_template_decl_real): Fix comment.
	(convert_nontype_argument): Likewise.
	(lookup_template_class): Likewise.  Avoid an infinite loop on
	erroneous code.
	(tsubst_friend_function): Fix comment.
	(tsubst, case FUNCTION_DECL): Deal with a DECL_TI_TEMPLATE that is
	an IDENTIFIER_NODE.
	* semantics.c (begin_function_definition): Use
	reset_specialization to note that template headers don't apply
	directly to declarations after the opening curly for a function.

From-SVN: r21505