Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:86670
Return-Path: <dmitry@zend.com>
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Delivered-To: mailing list internals@lists.php.net
Received: (qmail 75125 invoked from network); 15 Jun 2015 19:44:50 -0000
Received: from unknown (HELO lists.php.net) (127.0.0.1)
  by localhost with SMTP; 15 Jun 2015 19:44:50 -0000
Authentication-Results: pb1.pair.com header.from=dmitry@zend.com; sender-id=pass
Authentication-Results: pb1.pair.com smtp.mail=dmitry@zend.com; spf=pass; sender-id=pass
Received-SPF: pass (pb1.pair.com: domain zend.com designates 209.85.160.172 as permitted sender)
X-PHP-List-Original-Sender: dmitry@zend.com
X-Host-Fingerprint: 209.85.160.172 mail-yk0-f172.google.com  
Received: from [209.85.160.172] ([209.85.160.172:36139] helo=mail-yk0-f172.google.com)
	by pb1.pair.com (ecelerity 2.1.1.9-wez r(12769M)) with ESMTP
	id 0D/42-52527-13B2F755 for <internals@lists.php.net>; Mon, 15 Jun 2015 15:44:49 -0400
Received: by ykaz81 with SMTP id z81so65422494yka.3
        for <internals@lists.php.net>; Mon, 15 Jun 2015 12:44:46 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=1e100.net; s=20130820;
        h=x-gm-message-state:mime-version:date:message-id:subject:from:to
         :content-type;
        bh=74RwJuP1bqWjvcrjLZK1x9DzXH0oMrZKWvMIf+Jbni4=;
        b=jo4Ka+c2qLA89HpNoHtym9WzL9kbJehPr5qkkjnrCECQioDNbZLodCCz9Xw5YkEol1
         fNXeHGi0ZSeva9LpixKvW1NEeNLAZ1oq/uEdbsoJX8agbqfojs/hL7nQ2rUCbnnNRogj
         GYI3cwJdfda6ltVHICaxtQdYwHBRFMRBhVH2/sYofKmPFMdVEJ19+eYr3t/YOqrMoJxw
         sj/vxfTFgCJpJFIAUebScZoN8wzFfCJ81bEq+4YNfKrMVfeFPOW8yhNL5lX/XT/0iV6U
         4qNgoRkZ6pENQU+gDJUfOB5/vJDgPo2Bl+Fdh/dXQv8rISk8jvV2mnRXXb7mxEVMYlwR
         y9Rg==
X-Gm-Message-State: ALoCoQkIwk6yicxNoKp6Q5YaihIF5XnKI+ho9emH6QS+gZ3IN6NDY4z/XnHUm92ZJrpConOAkh9sdnweLJuFDS05PDHfTdZE1nhZ0QIqobQ18kX/lGNE40bOBHl5NbBPyyEb0XKT4HL59CCITFd+yIFELm9I9vmE9NlHdfM2fZpvpQKJwL9Ab1o=
MIME-Version: 1.0
X-Received: by 10.52.13.166 with SMTP id i6mr11864612vdc.17.1434397486500;
 Mon, 15 Jun 2015 12:44:46 -0700 (PDT)
Received: by 10.31.10.201 with HTTP; Mon, 15 Jun 2015 12:44:46 -0700 (PDT)
Date: Mon, 15 Jun 2015 22:44:46 +0300
Message-ID: <CA+9eiLsTzAHZ=r3vPFWbL_ApQb4q-6MPQerJ7ek403KECz1DEg@mail.gmail.com>
To: davey@php.net, Andrea Faulds <ajf@ajf.me>, Stanislav Malyshev <smalyshev@gmail.com>, 
	Anatol Belski <ab@php.net>, Kalle Sommer Nielsen <kalle@php.net>, PHP Internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=485b397dd7aba66eb8051893b09a
Subject: Spaceship and NaNs
From: dmitry@zend.com (Dmitry Stogov)

--485b397dd7aba66eb8051893b09a
Content-Type: text/plain; charset=UTF-8

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.

Thanks. Dmitry.

--485b397dd7aba66eb8051893b09a--