[Accepted at the July, 2022 meeting.]

The intent of paper P2128R6, which permitted multiple parameters in overloaded subscript operators and was adopted at the October, 2021 plenary, was that overloaded operator[] should allow parameters with default arguments. However, the adopted wording did not address the following restriction from 12.4.1 [over.oper.general] paragraph 10:

An operator function cannot have default arguments (9.3.4.7 [dcl.fct.default]), except where explicitly stated below.

Similar wording to that of operator() should be added for operator[].