Bug #75192 [Ana->Nab]: Spaceship operator returns wrong value for GMP numbers

Edit report at https://bugs.php.net/bug.php?id=75192&edit=1 ID: 75192 Updated by: cmb@php.net Reported by: marcospassos dot com at gmail dot com Summary: Spaceship operator returns wrong value for GMP numbers -Status: Analyzed +Status: Not a bug Type: Bug Package: GNU MP related Operating System: Mac PHP Version: 7.1.9 -Assigned To: +Assigned To: cmb Block user comment: N Private report: N New Comment: > Though personally I wish <=> wasn't so rigid to begin with. It is not. Actually, the documentation states[1]: > An integer less than, equal to, or greater than zero when $a is > respectively less than, equal to, or greater than $b. Available > as of PHP 7. So this is not a bug. One might desire a sign() function, so that the result of <=>, strcmp() etc. could easily be used in a switch, but that would be a separate feature request, and can be implemented in user-land, of course. [1] <http://php.net/manual/en/language.operators.comparison.php> Previous Comments: ------------------------------------------------------------------------ [2017-09-12 05:19:16] requinix@php.net gmp's <=> overload wraps gmp_cmp() so it should be a pretty simple fix to gmp.c:gmp_compare to bound the return to -1/+1. Though personally I wish <=> wasn't so rigid to begin with. ------------------------------------------------------------------------ [2017-09-12 01:38:42] marcospassos dot com at gmail dot com In fact, the operator overloading works, but the result is not compatible with the operator specification. ------------------------------------------------------------------------ [2017-09-12 01:34:56] marcospassos dot com at gmail dot com Description: ------------ Operator overloading does not work for the spaceship operator. Test script: --------------- $result = gmp_init('1') <=> gmp_init('-1'); Expected result: ---------------- 1 Actual result: -------------- 2 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=75192&edit=1