Re: [RFC] Combined Comparison (Spaceship) Operator

Hi Andrea, On Mon, Jan 19, 2015 at 5:28 PM, Andrea Faulds <ajf@ajf.me> wrote: > This is a reboot of Davey Shafik’s RFC (with permission). After recent > discussions about sort functions, I was inspired to bring this back up, as > I think it would be a useful feature. > > The RFC is here: > https://wiki.php.net/rfc/combined-comparison-operator > Ruby has it. Semantics is the same. http://ruby-doc.org/core-1.9.3/Comparable.html PERL has it. Semantics is the same. http://perldoc.perl.org/perlop.html#Operator-Precedence-and-Associativity Python has similar "<>", but it only compares equality. (the same as !=, !==) [yohgaki@dev github-php-src]$ python Python 2.7.8 (default, Nov 10 2014, 08:19:18) [GCC 4.9.2 20141101 (Red Hat 4.9.2-1)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> 1 <> 1 False >>> 1 <> 0 True >>> 1 <> 1 False >>> 1 <> 2 True MySQL has it. Different differs. It's for NULL comparison. http://dev.mysql.com/doc/refman/5.6/en/comparison-operators.html#operator_equal-to There is no reason not to have it, it seems. I suggest to add Ruby/PERL operator link to the RFC. I would like to name it other than T_SPACESHIP. Regards, -- Yasuo Ohgaki yohgaki@ohgaki.net