imenu / speedbar and C++

[Jay Cotton]

I've been enjoying the emacs imenu / speedbar features for coding Java 
and Ruby, but at the moment I'm working on a C++ project and now I'm 
having trouble getting imenu to recognize all the functions in the 
file. It seems to only recognize the class definition and the "main" 
function - which I guess makes sense if it follows a convention of only 
noticing functions that are delimited at the left margin.

However, in my C++ file, all the interesting stuff happens within the 
class, and the functions therein are all indented a few spaces. Is 
there a way to broaden imenu's tag filter to allow for these functions 
to be captured?

Also, I'm confused about why imenu and speedbar work so well with Java 
and Ruby, since they have functions that are indented similarly to C++.

Thanks for any advice!

Jay