Re: [boost] Exception lib [boost::throw_]

From: Emil Dotchevski (emildotchevski_at_[hidden])
Date: 2006-07-07 13:39:33

> I see different problems here. One is the hackish and completely
> unintuitive way << works: it does not create a temporary (we can't have
> more than one throw_ temp) and actually modifies its left argument. But
> that's a style issue.

I admit my current implementation is a bit hackish, not only that operator<< 
modifies its argument but in fact that argument is a const &. Obviously I 
implemented operator<< this way to avoid creating temps. But I should at 
least change the documentation to specify that operator<< has no effects and 
returns its argument by value.

> int what_on_earth(earth &e)
> {
>  // ...
>  boost::throw_<something_bad_happened>() << e;
>  // Does the compiler realize this is unreachable, or will it emit a
> missing return value warning/error?
> }

Ah yes, you're right it could be confused. Well, using failed<> doesn't have 
this problem. But I do want to come up with a better name for it!

--Emil