Commits on Aug 23, 2023

1. slogr: restore original backend when converting back and forth …

   This works both ways by checking whether the backend is one of our own
   wrappers. There's one exception: when the verbosity level was modified, we
   cannot use the original slog.Handler because it doesn't know about that
   modification.
   
   The downside is that we have to adjust the stack unwinding each time a record
   is handled, because we need the original sink without that adjustment. This
   only gets done when actually emitting a log record, so that overhead should be
   okay. It will disappear entirely once sinks directly support writing a
   slog.Event.
   
   A second copy would work, but then that copy would need to be updated alongside
   the other one in WithAttrs, which causes overhead along a callchain also when
   the log record does not get emitted. The code also would be more complex.

   

   pohly committed Aug 23, 2023
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