Maybe to a non C++ dev, but a lot of C++ is probably incomprehensible to a non C++ dev, just like there are other laguages that are incomprehensible to C++ devs. To me it makes perfect sense as it works just like all the other operator overloads.
auto - let the compiler deduce return type
operator<=> - override the spaceship operator (pretty sure it exists in python too)
(const ClassName&) - compare this class, presumably defined in Class name, with a const reference of type Class name, i.e. its own type.
const - comparison can be made for const objects
= default; - Use the default implementation, which is comparing all the member variables.
An alternate more explicit version, which is actually what people recommend:
It makes perfect sense actually. I did write another comment here if you are interested.
This is how operator overloads were written going back to the initial version of C++ back in 1985. The only new thing is that we can now add = default to get the compiler to generate a default implementation that compares all the member variables for you.
I do appreciate how newer C++ standards have made these kinds of things a lot easier too.
Define all comparison operators with just one one line using C++20
auto operator<=>(const ClassName&) const = default;That is completely incomprehensible lol
Maybe to a non C++ dev, but a lot of C++ is probably incomprehensible to a non C++ dev, just like there are other laguages that are incomprehensible to C++ devs. To me it makes perfect sense as it works just like all the other operator overloads.
auto- let the compiler deduce return typeoperator<=>- override the spaceship operator (pretty sure it exists in python too)(const ClassName&)- compare this class, presumably defined in Class name, with a const reference of type Class name, i.e. its own type.const- comparison can be made for const objects= default;- Use the default implementation, which is comparing all the member variables.An alternate more explicit version, which is actually what people recommend:
auto operator<=>(const ClassName&, const ClassName&) = default;if I just want to have less than comparison for example I would:
This one makes it explicit that you’re comparing two Class name objects.
if I just want to have less than comparison for example I would:
auto operator<(const ClassName&, const ClassName&) = default;If I need to compare against another class I could define:
auto operator<(const ClassName&, const OtherClass&)It’s nice that this exists these days, but my god is it horrendously unreadable at a glance
It makes it look like they’re just adding random noise to avoid colliding with existing syntax. Maybe they can try a UUID next time…
It makes perfect sense actually. I did write another comment here if you are interested.
This is how operator overloads were written going back to the initial version of C++ back in 1985. The only new thing is that we can now add
= defaultto get the compiler to generate a default implementation that compares all the member variables for you.BuT ItS uNsAfE.
Only if you’re a bad programmer :/
This argument just doesn’t hold up. Software written by some of the best developers in the world still has these same bugs.
Why even use a language where you have to put so much effort into something that comes for free in many modern languages.