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, worker_t& >(boost::ref(workit));

Hope that helps.

Ovanes

On Tue, May 20, 2008 at 8:35 AM, Sebastian Weber mailto:sebastian.weber@physik.tu-darmstadt.de> 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, 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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