In file included from /build/sailer/addDaskJobQ/buildlhcb20/frameworks/Gaudi-v36r12/src/Gaudi/v36r12/GaudiCoreSvc/src/MessageSvc/MessageSvcSink.cpp:18:
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h: In instantiation of 'constexpr decltype (ctx.begin()) fmt::v10::detail::parse_format_specs(ParseContext&) [with T = fmt::v10::runtime_format_string<>; ParseContext = compile_parse_context<char>; decltype (ctx.begin()) = const char*]':
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:2620:22:   required from 'constexpr fmt::v10::detail::format_string_checker<Char, Args>::format_string_checker(fmt::v10::basic_string_view<Char>) [with Char = char; Args = {fmt::v10::runtime_format_string<char>}]'
/build/sailer/addDaskJobQ/buildlhcb20/frameworks/Gaudi-v36r12/src/Gaudi/v36r12/GaudiCoreSvc/src/MessageSvc/MessageSvcSink.cpp:111:38:   required from 'auto fmt::v10::formatter<{anonymous}::json_fmt_arg>::format(const {anonymous}::json_fmt_arg&, FormatContext&) [with FormatContext = fmt::v10::basic_format_context<fmt::v10::appender, char>]'
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:812:70:   required by substitution of 'template<class Context, class T> constexpr decltype ((typename Context::formatter_type<T>().format(declval<const T&>(), declval<Context&>()), true)) fmt::v10::detail::has_const_formatter_impl(T*) [with Context = fmt::v10::basic_format_context<fmt::v10::appender, char>; T = {anonymous}::json_fmt_arg]'
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:823:43:   required from 'constexpr bool fmt::v10::detail::has_const_formatter() [with T = {anonymous}::json_fmt_arg; Context = fmt::v10::basic_format_context<fmt::v10::appender, char>]'
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:1440:54:   required from 'struct fmt::v10::detail::arg_mapper<fmt::v10::basic_format_context<fmt::v10::appender, char> >::formattable<const {anonymous}::json_fmt_arg&, {anonymous}::json_fmt_arg>'
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:1448:25:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:1476:53:   required by substitution of 'template<class T, class Context> using fmt::v10::detail::mapped_type_constant = fmt::v10::detail::type_constant<decltype (fmt::v10::detail::arg_mapper<Context>().map(declval<const T&>())), typename Context::char_type> [with T = {anonymous}::json_fmt_arg; Context = fmt::v10::basic_format_context<fmt::v10::appender, char>]'
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:2621:66:   required from 'constexpr fmt::v10::detail::format_string_checker<Char, Args>::format_string_checker(fmt::v10::basic_string_view<Char>) [with Char = char; Args = {char, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, {anonymous}::json_fmt_arg}]'
/build/sailer/addDaskJobQ/buildlhcb20/frameworks/Gaudi-v36r12/src/Gaudi/v36r12/GaudiCoreSvc/src/MessageSvc/MessageSvcSink.cpp:147:30:   required from 'Stream& {anonymous}::printCounter(Stream&, std::string_view, const nlohmann::json&) [with Stream = MsgStream; std::string_view = std::basic_string_view<char>; nlohmann::json = nlohmann::basic_json<>]'
/build/sailer/addDaskJobQ/buildlhcb20/frameworks/Gaudi-v36r12/src/Gaudi/v36r12/GaudiCoreSvc/src/MessageSvc/MessageSvcSink.cpp:194:21:   required from 'Gaudi::Monitoring::MessageSvcSink::stop()::<lambda(auto:62&)> [with auto:62 = std::pair<const std::__cxx11::basic_string<char>, nlohmann::basic_json<> >]'
/cvmfs/sft.cern.ch/lcg/releases/gcc/13.1.0-b3d18/x86_64-centos7/include/c++/13.1.0/bits/stl_algo.h:3833:5:   required from 'constexpr _Funct std::for_each(_IIter, _IIter, _Funct) [with _IIter = _Rb_tree_iterator<pair<const __cxx11::basic_string<char>, nlohmann::basic_json<> > >; _Funct = Gaudi::Monitoring::MessageSvcSink::stop()::<lambda(auto:62&)>]'
/build/sailer/addDaskJobQ/buildlhcb20/frameworks/Gaudi-v36r12/src/Gaudi/v36r12/GaudiCoreSvc/src/MessageSvc/MessageSvcSink.cpp:190:18:   required from here
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:2561:10: error: use of deleted function 'fmt::v10::formatter<T, Char, Enable>::formatter() [with T = fmt::v10::runtime_format_string<>; Char = char; Enable = void]'
 2561 |   return formatter<mapped_type, char_type>().parse(ctx);
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:792:3: note: declared here
  792 |   formatter() = delete;
      |   ^~~~~~~~~
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h: In instantiation of 'constexpr fmt::v10::detail::value<Context> fmt::v10::detail::make_value(T&&) [with Context = fmt::v10::basic_format_context<fmt::v10::appender, char>; T = fmt::v10::runtime_format_string<>&]':
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:1711:29:   required from 'constexpr fmt::v10::detail::value<Context> fmt::v10::detail::make_arg(T&&) [with bool IS_PACKED = true; Context = fmt::v10::basic_format_context<fmt::v10::appender, char>; type <anonymous> = fmt::v10::detail::type::custom_type; T = fmt::v10::runtime_format_string<>&; typename std::enable_if<IS_PACKED, int>::type <anonymous> = 0]'
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:1827:77:   required from 'constexpr fmt::v10::format_arg_store<Context, Args>::format_arg_store(T&& ...) [with T = {fmt::v10::runtime_format_string<char>&}; Context = fmt::v10::basic_format_context<fmt::v10::appender, char>; Args = {fmt::v10::runtime_format_string<char>}]'
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:1844:31:   required from 'constexpr fmt::v10::format_arg_store<Context, typename std::remove_cv<typename std::remove_reference<T>::type>::type ...> fmt::v10::make_format_args(T&& ...) [with Context = basic_format_context<appender, char>; T = {runtime_format_string<char>&}]'
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:2817:44:   required from 'std::string fmt::v10::format(format_string<T ...>, T&& ...) [with T = {runtime_format_string<char>}; std::string = std::__cxx11::basic_string<char>; format_string<T ...> = basic_format_string<char, runtime_format_string<char> >]'
/build/sailer/addDaskJobQ/buildlhcb20/frameworks/Gaudi-v36r12/src/Gaudi/v36r12/GaudiCoreSvc/src/MessageSvc/MessageSvcSink.cpp:111:38:   required from 'auto fmt::v10::formatter<{anonymous}::json_fmt_arg>::format(const {anonymous}::json_fmt_arg&, FormatContext&) [with FormatContext = fmt::v10::basic_format_context<fmt::v10::appender, char>]'
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:812:70:   [ skipping 5 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:1476:53:   required by substitution of 'template<class T, class Context> using fmt::v10::detail::mapped_type_constant = fmt::v10::detail::type_constant<decltype (fmt::v10::detail::arg_mapper<Context>().map(declval<const T&>())), typename Context::char_type> [with T = {anonymous}::json_fmt_arg; Context = fmt::v10::basic_format_context<fmt::v10::appender, char>]'
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:2621:66:   required from 'constexpr fmt::v10::detail::format_string_checker<Char, Args>::format_string_checker(fmt::v10::basic_string_view<Char>) [with Char = char; Args = {char, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, {anonymous}::json_fmt_arg}]'
/build/sailer/addDaskJobQ/buildlhcb20/frameworks/Gaudi-v36r12/src/Gaudi/v36r12/GaudiCoreSvc/src/MessageSvc/MessageSvcSink.cpp:147:30:   required from 'Stream& {anonymous}::printCounter(Stream&, std::string_view, const nlohmann::json&) [with Stream = MsgStream; std::string_view = std::basic_string_view<char>; nlohmann::json = nlohmann::basic_json<>]'
/build/sailer/addDaskJobQ/buildlhcb20/frameworks/Gaudi-v36r12/src/Gaudi/v36r12/GaudiCoreSvc/src/MessageSvc/MessageSvcSink.cpp:194:21:   required from 'Gaudi::Monitoring::MessageSvcSink::stop()::<lambda(auto:62&)> [with auto:62 = std::pair<const std::__cxx11::basic_string<char>, nlohmann::basic_json<> >]'
/cvmfs/sft.cern.ch/lcg/releases/gcc/13.1.0-b3d18/x86_64-centos7/include/c++/13.1.0/bits/stl_algo.h:3833:5:   required from 'constexpr _Funct std::for_each(_IIter, _IIter, _Funct) [with _IIter = _Rb_tree_iterator<pair<const __cxx11::basic_string<char>, nlohmann::basic_json<> > >; _Funct = Gaudi::Monitoring::MessageSvcSink::stop()::<lambda(auto:62&)>]'
/build/sailer/addDaskJobQ/buildlhcb20/frameworks/Gaudi-v36r12/src/Gaudi/v36r12/GaudiCoreSvc/src/MessageSvc/MessageSvcSink.cpp:190:18:   required from here
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:1691:7: error: static assertion failed: Cannot format an argument. To make type T formattable provide a formatter<T> specialization: https://fmt.dev/latest/api.html#udt
 1691 |       formattable,
      |       ^~~~~~~~~~~
/build/sailer/addDaskJobQ/install/dev4lhcb/fmt/10.0.0/x86_64-centos7-gcc13-opt/include/fmt/core.h:1691:7: note: 'formattable' evaluates to false
make[6]: *** [GaudiCoreSvc/CMakeFiles/GaudiCoreSvc.dir/src/MessageSvc/MessageSvcSink.cpp.o] Error 1

See merge request !1454

See merge request !1453

See merge request !1451

See merge request !1450

See merge request !1449

- move definition back into class as gcc can deal with it just fine now
- add explicit comparison to nullptr_t so that comparison to int can be
  deprecated
- add explicit conversion to bool to give SmartRef the same semantics as
  a pointer

See merge request !1448

See merge request !1446

Closes #263

See merge request !1441

Add flake8 to the pre-commit hooks. Also add `.flake8` configuration
file to the top-level project directory.

Closes #263.

See merge request !1440

See merge request !1447

Closes #264

See merge request !1445

See merge request !1443

See merge request !1442

See merge request !1438

See merge request !1437

See merge request !1406