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