On 02/01/18 01:26, VinÃcius dos Santos Oliveira via Boost wrote:
How pushing a "I forgot to do proper error handling" to compile time errors becomes "this is just axiomatic belief and helps no-one"?
During this same review, Andrzej Krzemienski noted an improper exceptions handling of exceptions in the swap function:
Also, it is possible that while reswapping, another exception will be
thrown. In general, you cannot guarantee the roll-back, so maybe it would be cleaner for everyone if you just declared that upon throw from swap, one cannot rely on the state of `result`: it should be reset or destroyed.
Should we remember the variant saga maybe[1][2]? These are not isolated cases. They keep happening.
It's not the exceptions that made variant difficult. It's *the possibility of a failure* at certain points in some cases. You would have the same difficulty defining behavior in these cases with any error reporting mechanism, exceptions or not.