The Right Approach to Exceptions

[Andrei Alexandrescu]

On 2/19/12 5:22 AM, deadalnix wrote:
> Le 19/02/2012 08:05, Andrei Alexandrescu a écrit :
>> How about a system in which you can say whether an exception is I/O
>> related, network related, recoverable or not, should be displayed to the
>> user or not, etc. Such is difficult to represent with inheritance alone.
>>
>
> That may sound great on the paper, but it isn't. The fact that an
> exception is recoverable or not depend often on your program and not on
> the cause of the exception.

This is self-evident. Again, the meaning of "recoverable" is "operation 
may succeed if retried with the same input". It's a hint for the catch 
code. Of course the program is free to ignore that aspect, retry a 
number of times, log, display user feedback, and so on. But as far as 
definition goes the notion is cut and dried.

Andrei