Re: [Boost-users] [tr1/config] portably including unordered_<X>

It appears that <boost/tr1/unordered_X.hpp> includes the native <unordered_X> when Boost.config says it's able.

So if one were writing a portable library that uses boost (or bug-fixing an existing boost component), would including <boost/tr1/unordered_X.hpp> be the way to bring it in, or should one look at BOOST_HAS_TR1_UNORDERED_SET and make a decision that way?

There's no mechanism analogous to BOOST_HAS_HASH / BOOST_HASH_<X>_HEADER that has to be navigated, right?

No, so either include boost/tr1/unordered_*.hpp if you want to use the tr1:: versions (native when available), or else include the boost unordered containers directly if you want to use the boost:: versions. HTH, John.