[Boost-users] Clang "blocks" and function<>

I wonder if there is anything already in Boost's implementation of the function template (that is exposed as std::tr1::function if you use Boost.TR1) that allows Clang's lambda-like "blocks" to be assigned to a function? Or, has anyone already fiddled with that and willing to share? —John reference: http://clang.llvm.org/docs/BlockLanguageSpec.txt