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boost::pfr::get_name — Returns name of a field with index I in simple aggregate T.
// In header: <boost/pfr/core_name.hpp> template<std::size_t I, typename T> BOOST_PFR_BEGIN_MODULE_EXPORT constexpr std::string_view get_name();
Example:
struct my_struct { int i, short s; }; assert(boost::pfr::get_name<0, my_struct>() == "i"); assert(boost::pfr::get_name<1, my_struct>() == "s");