Re: [boost] Exception lib?

From: Bronek Kozicki (brok_at_[hidden])
Date: 2006-07-04 07:02:14

Emil Dotchevski <emildotchevski_at_[hidden]> wrote:
>> - I don't think it's a good idea to have a tag mechanism to access
>> each info field. It's inconvenient having to declare the tag. Of
>> course strings can be abused.. but that's C++. I believe simple
>> string keys are enough and very descriptive and easy to use.
>
> I guess I was overly concerned with abusing strings, but that's
> because in
> my experience as game programmer I've seen strings abused quite often.
> Several people have made similar comments, I think I'm convinced.

Personally I like tags more. Strings have to be not only declared, but 
also defined, otherwise one risks suble (and impossible to catch in 
compilation) errors like:
  set("fool");
  get("foo1");

Now you see the problem, but if these lines are in two separate 
locations (as is often the case with throw ... catch) it will be much 
more difficult to diagnose. Futhermore, tags provide nice clue that 
there are some data specific to exception being passed - just like 
exception hierarchy does. Last but not least, forward declarations have 
a nice property that they can be declared in multiple locations (no need 
for central location) and compiler will verify that they are used 
uniformly.

B.