How can I use namespaces with the C++ interface ?

Hello

How could I use a namespace like yy (the same way bison does) for the 
generated scanner with the C++ interface ?

I tried to open "namespace yy {" at the %top of the file, and to close 
it "}" at the bottom, but all the included standard headers in the 
generated scanner would be included in the namespace yy this way, 
instead of the expected global namespace.

I had no other idea than to explicitly include the C/C++ standard 
headers used by the scanner before I open the yy namespaces, at the top 
of the file, so that when the scanner later includes them, they will 
each see they have been already included and skip over any included content.

Can namespaces please be added to flex C++ interface ?

Thank you,
Timothy Madden