[Boost-users] Wave: how to recover after errors?

From: Max Motovilov (max_at_[hidden])
Date: 2005-12-03 23:22:55

I have a simple problem: wave warnings (specifically, macro re-definition)
are reported as exceptions thrown from [potentially, any of, at least I
don't yet know better] the methods of pp_iterator. It is very simple to
catch one and print a message, however I can't figure out how to recover
after one.

Can't seem to find any mention of error recovery in documentation, tried
some variations of last_known_good_iterator (store a copy before every
increment, restore back to known copy in exception handler) -- it recovers
simple cases but on more complex files there appears to be internal state
corruption. Also, even when this recovery works, it leaves macro in the
pre-redefinition state whereas the usual cpp policy is to allow redefinition
and print a warning.

I thought of using a preventive strategy -- undefine the existing macro from
a policy method -- but unfortunately the exception is thrown before
defined_macro() is called.

Looks like it's time to ask the owners of the library: how do I do this? :-)

Thanks in advance,
...Max...

PS. I am using 1.33.0; should I _really_ _really_ be upgrading to 1.33.1 to
get this resolved?