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