Re: [boost] [msm] Boost MPL vector limit size exceeded

Subject: Re: [boost] [msm] Boost MPL vector limit size exceeded
From: Christophe Henry (christophe.j.henry_at_[hidden])
Date: 2010-09-07 14:44:34

>Here is a little example I use favor_compile_time, (see attachment)
>
>But msm still tries to fold recursively all sub state machines states
>in to 1 big mpl vector.
>
>As you said in your last mail :
>
>>Yes, it would work but I think I remember you mentioning boost::any
>>not being an option. If boost::any and the performance loss are
>>acceptable for you then it would probably help.
>
>It would be possible to overcome this problem by using
>favor_compile_time but it seems apparently not :(.

It seems I didn't read correctly and thus gave an unclear answer. The
problem I was talking about was the compile-time.
So, if you allow, 2nd try:

The favor_compile_time policy will still fold all the transitions
inside a big mpl::vector, at least for the moment.
I already started a new version of the policy improving this too but
didn't finish it yet as the problem I was trying to improve (Jeff
Flinn's exploding compile-time) went away so there was not a big
demand for it.

So, again, yes, the policy still makes one big vector, but it's not so
much of a problem any more because the compile-times are greatly
reduced by the policy. So, increasing the mpl::vector size does not
hurt so much any more.
Sorry for the confusion.

Regards,

Christophe