> -----Original Message----- > From: Bob Weinand [mailto:bobw...@hotmail.com] > Sent: Monday, June 15, 2015 9:55 PM > To: Dmitry Stogov > Cc: da...@php.net; Andrea Faulds; Stanislav Malyshev; Anatol Belski; Kalle > Sommer Nielsen; PHP Internals > Subject: Re: [PHP-DEV] Spaceship and NaNs > > As far as I know, we made it that way in order to enforce an int return type all > the time. > int(-1) is indeed the sensible value for this. (Mainly int(0) does not work because > it'd mean equality and so we're left with int(-1) and int(1).) > > Just because other comparison ops already return a bool, we can return > bool(false) there. > > Bob > > > Am 15.06.2015 um 21:44 schrieb Dmitry Stogov <dmi...@zend.com>: > > > > Hi, > > > > I found a problem with spaceship operator. > > It doesn't define result for comparison with NaN. > > > > $ sapi/cli/php -r 'var_dump(sqrt(-1) <=> 0);' > > int(-1) > > $ sapi/cli/php -r 'var_dump(0 <=> sqrt(-1));' > > int(-1) > > > > $ sapi/cli/php -r 'var_dump(0 < sqrt(-1));' > > bool(false) > > > > all other comparison operators return "false" as well. > > false were correct, IMHO. Btw looks like the same case is with NAN <=> NAN.
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