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