* cp-tree.h (TYPE_BINFO): Update comment.
	(BOUND_TEMPLATE_TEMPLATE_PARM_TYPE_CHECK): New macro.
	(TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO): Use template_info.
	(TYPENAME_TYPE_FULLNAME): Use TYPE_FIELDS.
	(copy_type): Prototype new function.
	* lex.c (copy_lang_decl): Gather tree node statistics.
	(copy_lang_type): New function.
	(copy_type): Likewise.
	(cp_make_lang_type): Create lang_type for
	BOUND_TEMPLATE_TEMPLATE_PARM.  Set TYPE_BINFO for TYPENAME_TYPE
	and BOUND_TEMPLATE_TEMPLATE_PARM.
	* pt.c (tsubst): Use copy_type instead of copy_node.
	* search.c (lookup_field_1): Ignore TYPENAME_TYPE.

From-SVN: r46244