The spate of questions regarding BOOST_FOREACH
prompts me to ask users of the Boost library what (if anything) they are doing to prepare their code for portability
The best way to use shared parts between C++0x and Boost is to use the Boost.TR1, i.e; the implementation if the Technical Report already accepted. Boost.TR1 will use the implementation provided by the compiler when it is available, and the provided by Boost otherwise. This was the main goal of Boost.TR1
"The TR1 library provides an implementation of the C++ Technical Report on Standard Library Extensions. This library does not itself implement the TR1 components, rather it's a thin wrapper that will include your standard library's TR1 implementation (if it has one), otherwise it will include the Boost Library equivalents, and import them into namespace std::tr1. "