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Does using the 'catch, when' feature make exception handling faster because the handler is skipped as such and the stack unwinding can happen much earlier as when compared to handling the specific use cases within the handler?
Notes: If you, also, need to catch other exceptions than those in the pre-defined tuple, you will need to define another except block. If you just cannot tolerate a global variable, define it in main () and pass it around where needed...
python - How can I catch multiple exceptions in one line? (in the ...
Both constructs (catch () being a syntax error, as sh4nx0r rightfully pointed out) behave the same in C#. The fact that both are allowed is probably something the language inherited from C++ syntax. , can throw objects that do not derive from System.Exception. In these languages, catch will handle those non-CLS exceptions, but catch (Exception) won't.
will catch all C++ exceptions, but it should be considered bad design. You can use c++11's new std::current_exception mechanism, but if you don't have the ability to use c++11 (legacy code systems requiring a rewrite), then you have no named exception pointer to use to get a message or name. You may want to add separate catch clauses for the various exceptions you can catch, and only catch ...