on<>  std::spanstream  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous Erasure  Removed Features  Garbage Collection SupportC++23 Core Language6 Agenda  C++23 on<>  std::spanstream  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous Erasure  Removed Features  Garbage Collection Support7 Explicit Object Parameters  Instead on<>  std::spanstream  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous Erasure  Removed Features  Garbage Collection Support13 if consteval  Syntax: if consteval

= no run-time codegen, even in debug builds #include #include #include <filesystem> #include #include using namespace std; int main() { static constexpr obj"sv}; static_assert(ranges::is_sorted(skipped_extensions)); for (const auto& ent : filesystem::recursive_directory_iterator{"."}) { const string extension = ent.path().extension()

January 1980 UTC, it does not include leap seconds  file_clock: alias for the clock used for std::filesystem::file_time_type, epoch is unspecified63 Calendars & Timezones  New type alias sys_time: a time_point the library feature test macros, such as:  __cpp_lib_any, __cpp_lib_bool_constant, __cpp_lib_filesystem, …71 Immediate Functions – consteval  constexpr function  might be called at compile time