Htfy96 is right. This post gives more examples. https://devblogs.microsoft.com/cppblog/simplify-your-code-with-rocket-science-c20s-spaceship-operator/ https://

Htfy96 is right. This post gives more examples. https://devblogs.microsoft.com/cppblog/simplify-your-code-with-rocket-science-c20s-spaceship-operator/ https://devblogs.microsoft.com/cppblog/simplify-your-code-wi... Along with automatic synthesis of all the operators, c++ 20 also clarified rules about overload-matching and automatic construction of objects for purposes of comparison, so you don’t have to write the friend methods to for example compare int to your type if you have trivial int-taking constructor for your type. Also if your == operator or != is more efficient than a full lexigrapgical comparison the compiler will now do the right thing