In the documentation, there is written under
"ChangeDefaultMetaclass" (page 22 of the PDF):
"It should be called by Initialized() defined for a
metaclass loaded loaded by the -S option at the beginning.
Otherwise, that metaclass should be explicitely loaded by
the metaclass declaration, after which the new metaclass is
effective."
This does not work!
- I don't use the "-S" option
- I don't use any "metaclass" declaration
-> But the metaclass is still applied!
Why?!?
Problem:
At first sight, one would think that everything is ok. if
the metaclass is loaded and applied, but unfortunately it
is also applied to all to all system libraries, where I
don't want it. That's why I need the "metaclass
declaration" to be able to tell the OpenC++ processor where
to start applying the metaclass.
How can I do this?
(You can check the opencxx-problem.tar.gz file of my
previous mail for my implementation, it requires my patch).
What do I want to do:
- Add a function trace to all my classes without changing
a single line!
How do I try to do it:
- Automatically include file "fntrace.hxx" by passing
option "-include fntrace.hxx" to the C preprocessor
- Make my trace class the new default class, so it is
applied to all classes.
What's the problem with this approach:
- All included system headers are also instrumented,
means added a function trace
- But the header fntrace.hxx is included later, so
the symbols of that header are unknown before
Possible solutions:
- Find a way to include fntrace.hxx as very first file
- Start OpenC++ metaclass instrumentation only after
inclusion of fntrace.hxx (i.e. with a "metaclass
declaration", by adding the line "metaclass
IsTraceClass;" as last line in header fntrace.hxx)
The latter is exactly what I tried and why I send this error
report.
Any other idea?
Thank you
Regards
Marc
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