Re: [boost] Re: future of boost.threads

From: Victor A. Wagner, Jr. (vawjr_at_[hidden])
Date: 2004-02-10 10:45:11

At Monday 2004-02-09 23:33, you wrote:
>David Abrahams wrote:
>
>>"Brock Peabody" <brock.peabody_at_[hidden]> writes:
>>
>>>>-----Original Message-----
>>>>From: boost-bounces_at_[hidden] [mailto:boost-bounces_at_[hidden]]
>>>>On Behalf Of Victor A. Wagner, Jr.
>>>
>>>>We can either do nothing (until the standard changes so we can handle ALL
>>>>types) or we can do something (handle the built-in types and the standard
>>>>exceptions).
>>>>
>>>>I suggest "something" as a useful approach.
>>>
>>>I'd suggest allowing the user to specify a typelist rather than hard coding
>>>the standard types.  You could supply as a default the list of standard
>>>types.
>>
>>There are better ways.  Boost.Python uses a dynamic registration
>>technique.  Compile-time enumeration of the exceptions is overkill
>>and not sufficiently flexible.
>
>Isn't there a problem with ordering in hierarchies when using dynamic
>registration?
>
>    register_exception<std::exception>();
>    register_exception<my_exception>();
>
>vs
>
>    register_exception<my_exception>();
>    register_exception<std::exception>();
>
>AFAICT there is no way to determine the most derived type. Maybe this
>isn't a problem in practice..

that was the algorithm that I thought I'd remembered from Alexandrescu's tome.
I have a meeting in a few minutes, I'll try to look it up when I return.

>--
>Daniel Wallin
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Victor A. Wagner Jr.      http://rudbek.com
The five most dangerous words in the English language:
               "There oughta be a law"