2009/12/2 rogerdpack <rogerdpack@gmail.com>:

> Are there any c++ examples anywhere?
> My end goal is to be able to use Boost's hashes/regexes.

Luis summed it up pretty well.  There is no support for C++ in FFI.
You can either use something else like swig or rice, or write a shim C
library that accesses the C++ code you want to use in FFI.