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      Latest reply on Aug 6, 2019 6:39 PM by JetForMe
      JetForMe Level 1 Level 1 (0 points)

        std::optional is more-or-less avialable in Xcode 10.3, with the language dialect set to C++17, but not if the deployment target is less than iOS 12. std::optional is availble, but not value() methods of the class.

         

        I don't understand why a particular iOS runtime is needed to support something in the C++ standard (template) library.

         

        We can't give up support for iOS 11 until well after iOS 13 is out.

         

        I've seen some stuff around setting

         

        _LIBCPP_AVAILABILITY_THROW_BAD_OPTIONAL_ACCESS

         

        This seems to be defined by Xcode as

         

        __attribute__((availability(ios,strict,introduced=12.0)))

         

        Is there really no way to get full optional support AND target iOS 11.x?