The Right Approach to Exceptions

Andrei Alexandrescu SeeWebsiteForEmail at
Sun Feb 19 06:35:08 PST 2012

On 2/19/12 6:35 AM, deadalnix wrote:
> Le 19/02/2012 09:02, Andrei Alexandrescu a écrit :
>>>> I'm thinking an error is transient if retrying the operation with the
>>>> same exact data may succeed. That's a definition that's simple,
>>>> useful, and easy to operate with.
>>> [...]
>>> But if that's the case, what's the use of an exception at all?
>> Centralization.
>> Andrei
> Please stop answering like that. From the begining of this topic
> Jonathan M Davis, H. S. Teah (and myself ?) raised very valid points.
> What do you expect from that discussion if yourself you do not put any
> arguement on the table ?

The answer is meaningful. The purpose of exceptions is allowing for 
centralized error handling, and a capabilities-based system makes that 
simple (e.g. you get to make decisions about recoverability in one 
place, regardless of which part of the exception hierarchy the exception 


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