Interpreter to write error
messages to (NULL possible!).
const Trf_BaseOptions *baseOptions
Info about common options.
ClientData clientData
Arbitrary information, as defined
in
Trf_TypeDefinition.clientData.
DESCRIPTION
The procedure has to check the contents of the specified
container for errors, consistency, etc. It is allowed to
set default values into unspecified slots. Return value
is a standard tcl error code. In case of failure and interp
not NULL an error message should be left in the result area
of the specified interpreter.