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From: Martin Bonner (martin.bonner_at_[hidden])
Date: 2006-02-20 10:33:55
David Abrahams writes:
> Ion Gaztañaga <igaztanaga_at_[hidden]> writes:
>> but I suppose that the code must mark some "check-points" to know
>> how many object are already constructed, to know how many
>> destructors it must call when the exception occurs. I suppose that
>> can be implemented as an integer/pointer increment or
>> assignment. But the code must add something to the normal path to
>> know what to do when the exception occurs.
>
> No. All the necessary information is contained in the program counter
> at the point where the exception is thrown.
This is being VERY picky, but strictly speaking the information is contained in the program counter *and all the return addresses on the call stack*.
-- Martin Bonner Martin.Bonner_at_[hidden] Pi Technology, Milton Hall, Ely Road, Milton, Cambridge, CB4 6WZ, ENGLAND Tel: +44 (0)1223 203894
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