Not sure you can do it with a pack expansion. You can do it by taking an initializer_list<logfmtxx::field> though. edit: example: https://gcc.godbolt.org/z/dK7

Not sure you can do it with a pack expansion. You can do it by taking an initializer_list<logfmtxx::field> though. edit: example: https://gcc.godbolt.org/z/dK7Tq6hja https://gcc.godbolt.org/z/dK7Tq6hja