CXXD_HAS_STD_HASH — Determines whether the C++ standard hash implementation or the Boost hash implementation has been chosen.
// In header: <boost/cxx_dual/impl/hash.hpp> CXXD_HAS_STD_HASH
The object-like macro expands to: 1 if the C++ standard hash implementation has been chosen 0 if the Boost hash implementation has been chosen.
