One of the goals is to eliminate boilerplate. If I'm remembering my C++ correctly,!=, <=, >, and >= can be easily defined in terms of < and ==, but programmers

One of the goals is to eliminate boilerplate. If I'm remembering my C++ correctly,!=, <=, >, and >= can be easily defined in terms of < and ==, but programmers were required to spell out the definitions for all the operators manually. With operator<=>, one definition would allow the compiler to generate all 6 operators. There are some correctness and efficiency concerns operator<=> addresses, too, but I'm not confident I can explain those well. You can read more in P0515R0 [0], which sort of "rolls up" previous papers discussing comparisons. [0]: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0515r0.pdf http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p051...