https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103460
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:e46843ff75c37c705811e0c13bb469eda13b5f6c commit r12-7598-ge46843ff75c37c705811e0c13bb469eda13b5f6c Author: Jakub Jelinek <ja...@redhat.com> Date: Thu Mar 10 15:28:20 2022 +0100 c++: allow variadic operator[] for C++23 [PR103460] wg21.link/p2128 removed "with exactly one parameter" from over.sub section. grok_op_properties has for that the last 2 lines in: case OVL_OP_FLAG_BINARY: if (arity != 2) { if (operator_code == ARRAY_REF && cxx_dialect >= cxx23) break; but unfortunately it isn't enough, we reject variadic operator[] earlier. The following patch accepts variadic operator[] for C++23 too. 2022-03-10 Jakub Jelinek <ja...@redhat.com> PR c++/103460 * decl.cc (grok_op_properties): Allow variadic operator[] for C++23. * g++.dg/cpp23/subscript7.C: New test.