Devel::Spy::TieHandle - Tied logging wrapper for handles

  tie *FH, 'Devel::Spy::TieHandle', \ $fh, $logging_function
    or croak;

  # Passed operation through to $fh and tattled about the
  # operation to $logging_function.
  print { *FH } 42;

This has not been implemented. Feel free to add more and send me patches. I'll also grant you permission to upload into the Devel::Spy namespace if you're a clueful developer.

Devel::Spy, Devel::Spy::_obj, Devel::Spy::Util, Devel::Spy::TieHash, Devel::Spy::TieArray, Devel::Spy::TieScalar.