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From: Sebastian Weber (sebastian.weber_at_[hidden])
Date: 2008-05-20 08:14:17


Hi Ovanes!

Ahh, sure you are right. I got too much used to fusion
notion which I think is superior in this point. But I guess
there are some reasons for the ref-wrapping stuff which works.

Thanks again.

Sebastian

Ovanes Markarian schrieb:
> Hi, Sebastia!
>
> Please use boost::reference_wrapper to disable copying...
>
> mpl::for_each< mpl::vector<bool, double>, worker_t& >(boost::ref(workit));
>
>
> Hope that helps.
>
> Ovanes
>
> On Tue, May 20, 2008 at 8:35 AM, Sebastian Weber
> <sebastian.weber_at_[hidden]
> <mailto:sebastian.weber_at_[hidden]>> wrote:
>
> Hi there!
>
> I'm currently struggling with mpl::for_each: It copies my
> function object no matter what I do. Here is some dummy code:
>
> worker_t workit; // the worker object which recieves the
> different types and has an internal state
>
> mpl::for_each< mpl::vector<bool, double>, worker_t& >(workit);
>
> Now, the workit object becomes copied which is clear from
> the sources. However, I explicitly requested it not to be
> copied by the hint of giving the reference worker_t& as a
> template parameter.
>
> Maybe this behaviour is wanted, but I do not see the reason.
> In the fusion-world this is the way to go if one wants to
> prevent copying of function objects.
>
> Is this now a bug or a feature and how can I fix it (quick).
>
> Greetings,
>
> Sebastian
>
>
>
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>
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