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I know that I shouldn’t throw exceptions from a destructor.
If my destructor calls a function that can throw an exception, is it OK if I catch it in the destructor and don’t throw it further? Or can it cause abort anyway and I shouldn’t call such functions from a destructor at all?
Yes, that’s legal. An exception must not escape from the destructor, but whatever happens inside the destructor, or in functions it calls, is up to you.
(Technically, an exception can escape from a destructor call as well. If that happens during stack unwinding because another exception was thrown,
std::terminateis called. So it is well-defined by the standard, but it’s a really bad idea.)