Show that `expand-c-type-spec' is a generic function. Document
`expand-c-type-form', since it's exported.
type specifiers among its arguments.
\end{describe}
-\begin{describe}{fun}{expand-c-type-spec @<type-spec> @> @<form>}
+\begin{describe}{gf}{expand-c-type-spec @<type-spec> @> @<form>}
Returns the Lisp form that @|(c-type @<type-spec>)| would expand into.
+
+ If @<type-spec> is a list, then \descref{expand-c-type-form}{fun} is
+ invoked.
+\end{describe}
+
+\begin{describe}{gf}{expand-c-type-form @<head> @<tail> @> @<form>}
+ Returns the Lisp form that @|(c-type (@<head> . @<tail>)| would expand
+ into.
\end{describe}
\begin{describe}{gf}