[class.mem] Deduction guides do not declare new members

Author: sdkrystian

source/classes.tex

@@ -518,6 +518,8 @@
 if it is
 \begin{itemize}
 \item a friend declaration\iref{class.friend},
+\item a \grammarterm{deduction-guide}\iref{temp.deduct.guide},
+\item a \grammarterm{template-declaration} whose \grammarterm{declaration} is one of the above,
 \item a \grammarterm{static_assert-declaration},
 \item a \grammarterm{using-declaration}\iref{namespace.udecl}, or
 \item an \grammarterm{empty-declaration}.