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From: Alan.Griffiths_at_[hidden]
Date: 2003-10-02 02:56:19

> -----Original Message-----
> From: Alexander Terekhov [mailto:terekhov_at_[hidden]]
> Sent: 01 October 2003 19:33
> as I
> said, SEH exceptions are just ought to be "fully mapped" to the
> standard C++ exceptions.

That is a circular arguement - you are assuming the point you are trying to
establish. (One possible reason this mapping might not be possible is that
SEH does not respect sequence points.)

While C++ exceptions might reasonably be presented as a specialisation of
SEH exceptions the converse isn't true. (Aside from the unresolved question
over sequence points SEH exceptions can occur without a throw expression,
can be resumed, are not available on all platforms, ...)

> [...]
> > o by the runtime environment (which calls "unexpected"
> > without *any* cleanup). While the program as a whole
> > is clearly broken in this case, this breaks cleanup
> > guarantees that exist between the throw point and the
> > top of the stack.
> ISO/IEC 14882:
> "If no matching handler is found in a program, the function
> terminate() is called; whether or not the stack is unwound
> before this call to terminate() is implementation-defined"

An implementation must document how it behaves and (admittedly only QOI)
some do it right. I prefer this to requiring them to do it wrong. In any
event this is not worth spending much time on - the program is broken.

Alan Griffiths 
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