Annex A (informative) Grammar summary [gram]

A.9 Derived classes [gram.derived]

base-clause:
	: base-specifier-list

base-specifier-list:
	base-specifier ...${}_{opt}$
	base-specifier-list , base-specifier ...${}_{opt}$

base-specifier:
	attribute-specifier-seq${}_{opt}$ class-or-decltype
	attribute-specifier-seq${}_{opt}$ virtual access-specifier${}_{opt}$ class-or-decltype
	attribute-specifier-seq${}_{opt}$ access-specifier virtual${}_{opt}$ class-or-decltype

class-or-decltype:
	nested-name-specifier${}_{opt}$ class-name
	nested-name-specifier template simple-template-id
	decltype-specifier

access-specifier:
	private
	protected
	public