[boost] [msm]how to distinguish region ids?

Subject: [boost] [msm]how to distinguish region ids?
From: Takatoshi Kondo (kondo_at_[hidden])
Date: 2011-06-20 21:37:55

Hello,

On Boost.Msm 1.46.1,
When I use explicit entries and entry pseudo states, I have to provide a template argument "region id".
http://www.boost.org/doc/libs/1_46_1/libs/msm/doc/HTML/ch03s02.html#d0e930

But I couldn't find documents about numbering policy of region id.
I also check the example below.
http://www.boost.org/doc/libs/1_46_1/libs/msm/doc/HTML/examples/DirectEntryTutorial.cpp
The example passes the region id 0 and 1.
I'd like to know how to decide which region is 0(or1).

Am I missing something?

Thanks,
Takatoshi