@@ -3292,7 +3292,8 @@
 \pnum
 A \defnadj{subscripting}{operator function}
 is a function named \tcode{\keyword{operator}[]}
-that is a non-static member function.
+that is a non-static member function with an arbitrary number of parameters.
+It may have default arguments.
 For an expression of the form
 \begin{ncsimplebnf}
 postfix-expression \terminal{[} \opt{expression-list} \terminal{]}