in src/include/m/utility/utility.h [23:32]
constexpr std::strong_ordering operator<=>(T l, T r) \
{ \
if (std::to_underlying(l) < std::to_underlying(r)) \
return std::strong_ordering::less; \
\
if (std::to_underlying(l) > std::to_underlying(r)) \
return std::strong_ordering::greater; \
\
return std::strong_ordering::equivalent; \
} \