Re: [Boost-users] Review: Switch library

Richard wrote:

[Please do not mail me a copy of your followup]

boost@lists.boost.org spake the secret code thusly:

...

I also urge Steven to pursue the dynamic_switch idea I posted which employs perfect hashing at compile time whereby allowing equivalent or faster than a switch dispatch at runtime where the cases are dynamic (instead of compile time constants).

I just want to say that I think this approach is so amazingly cool, my socks are not only blown off, but orbiting the planet :-).

Yes, it's so cool. I believe it can be done. A well designed compiler implements switch using perfect (or near perfect) hashing anyway. Seems though that some compilers still don't. Here's the relevant link (with attached experiment code): http://lists.boost.org/Archives/boost/2004/08/69787.php Regards, -- Joel de Guzman http://www.boost-consulting.com http://spirit.sf.net