[Bug c++/93120] New: gcc-9 complains fails to see that switch handles all enum values, and still complains ' "control reaches end of non-void function" when there is no return after the switch

[yuri at tsoft dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93120

            Bug ID: 93120
           Summary: gcc-9 complains fails to see that switch handles all
                    enum values, and still complains ' "control reaches
                    end of non-void function" when there is no return
                    after the switch
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: yuri at tsoft dot com
  Target Milestone: ---

Example:
https://github.com/yurivict/nn-insight/blob/master/plugins/tf-lite/tf-lite.cpp#L33


gcc-9 complains:
> /usr/ports/misc/nn-insight/work/nn-insight-0.1-3-g78a125f/plugins/tf-lite/tf-lite.cpp:
>  In function 'PluginInterface::PaddingType 
> Helpers::convertPaddingType(tflite::Padding)':
> /usr/ports/misc/nn-insight/work/nn-insight-0.1-3-g78a125f/plugins/tf-lite/tf-lite.cpp:37:2:
>  warning: control reaches end of non-void function [-Wreturn-type]
>    37 |  }
>       |  ^