* cp-tree.h (ENUM_TEMPLATE_INFO): New macro.
	(TYPE_TEMPLATE_INFO): Likewise.
	(SET_TYPE_TEMPLATE_INFO): Likewise.
	(ENUM_TI_TEMPLATE): Likewise.
	(ENUM_TI_ARGS): Likewise.
	(lookup_nested_type_by_name): Remove.
	* decl.c (maybe_process_template_type_declaration): Handle enums.
	(start_enum): Don't check for primary-template enum declarations
	here.
	(finish_enum): Clean up, document.  Make sure template enum
	constants get the correct type.
	(build_enumerator): Copy initializers for template enumerations,
	too.
	(grok_enum_decls): Document.
	* lex.c (do_identifier): Document use of LOOKUP_EXPR a bit
	better.  Build LOOKUP_EXPRs for local variables, even if they are
	TREE_PERMANENT.
	* pt.c (tsubst_enum): Remove field_chain parameter.
	(template_class_depth): Include the depth of surrounding function
	contexts.
	(push_template_decl): Check for primary-template enum declarations
	here.  Deal with enumeration templates.
	(lookup_template_class): Likewise.
	(for_each_template_parm): Likewise.
	(instantiate_class_template): Don't call tsubst_enum directly,
	call tsubst instead, to instantiate enums.  Deal with all
	field_chain issues here, not in tsubst_enum.
	(lookup_nested_type_by_name): Remove.
	(tsubst_aggr_type): Revise handling of enumeration types.
	(tsubst): Likewise.
	(tsubst_copy): Likewise.
	(tsubst_expr): Call tsubst, not tsubst_enum for TAG_DEFNs.

From-SVN: r21622