Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
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BOOST_VARIANT_DO_NOT_SPECIALIZE_STD_HASH — Define this macro if you do not wish to have a std::hash specialization for
boost::variant.
// In header: <boost/variant/variant_fwd.hpp>
BOOST_VARIANT_DO_NOT_SPECIALIZE_STD_HASH