http://www.fpx.de/fp/Software/tclobj/ describes an interface between C++ objects and Tcl.

'''FP:''' tclobj is an old package, and it is not maintained any
more.[Swig] does a much better job.

The tclobj project had some still-useful fallout in a text
that describes some potential problems of building C++ modules
for Tcl [http://www.fpx.de/fp/Software/tcl-c++/]

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[Category Package]