[sv-ac] P1800 current PAR

Hello,

I checked what is now allowed as a change in the LRM: 

"The require changes for new features must be highly localized in the
standard.  Changes that require edits in multiple chapters would not
qualify as local."

This means that we may or may not be able to add followed_by because it
may require changes in the BNF, semantics, VPI, and of course Ch. 17. 

When a more profound change could be introduced, enhancement, is with
the next PAR, probably close to the year 2010.

Best regards,
ed