From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org
X-Spam-Level: 
X-Spam-Status: No, score=-3.4 required=5.0 tests=DKIM_SIGNED,DKIM_VALID,
	DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,UNPARSEABLE_RELAY
	autolearn=ham autolearn_force=no version=3.4.4
Received: (qmail 32373 invoked from network); 28 Nov 2021 20:34:58 -0000
Received: from zero.zsh.org (2a02:898:31:0:48:4558:7a:7368)
  by inbox.vuxu.org with ESMTPUTF8; 28 Nov 2021 20:34:58 -0000
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=zsh.org;
	s=rsa-20210803; h=List-Archive:List-Owner:List-Post:List-Unsubscribe:
	List-Subscribe:List-Help:List-Id:Sender:Message-ID:Date:Content-ID:
	Content-Type:MIME-Version:Subject:To:References:From:In-reply-to:Reply-To:Cc:
	Content-Transfer-Encoding:Content-Description:Resent-Date:Resent-From:
	Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID;
	bh=X1WrbeaM9riYtraSZHvkWQQynyYAjaz34JlEAcshmjQ=; b=e0kp6WQu6mkbhQH/6CHGzw2Zz/
	xUI+V2jck0Qi4tI4tDrYnS8tWpWkqgzdZus+t1zdUEqWRlxFLsaJjgleofQn/4TMHG6d9E35BY0YH
	3olSAOhf4ZW1TtfJMk5K6E/XzEYtJQNZ4AI/xtdNxH2MnavJjADJAGrnmNKCNpFngrukD0GDsNLQF
	0Nexrk5lQH7TUaZriROl37QDsptZqqUkfhOmFufTgPzyBSbI/yAMi/tvLTljC0vEgR5X0mJkU2lfc
	DV9yYTMgAqbXy0cpMKVfDMlg1cmy0nMzJdcrVZxb4cVTxgKQe8oHo9U9jfQrrHgwhhC1+EUS7ssUI
	MeYdHXqA==;
Received: from authenticated user by zero.zsh.org with local 
	id 1mrQt0-000HaK-Ba; Sun, 28 Nov 2021 20:34:58 +0000
Received: from authenticated user by zero.zsh.org with esmtpsa (TLS1.3:TLS_AES_256_GCM_SHA384:256)
	id 1mrQsk-000HGp-F7; Sun, 28 Nov 2021 20:34:42 +0000
Received: from [192.168.178.21] (helo=hydra)
	by mail.kiddle.eu with esmtp(Exim 4.94.2)
	(envelope-from <opk@zsh.org>)
	id 1mrQsj-000Dw8-6w
	for zsh-workers@zsh.org; Sun, 28 Nov 2021 21:34:41 +0100
In-reply-to: <20211116125522.GA121624@zira.vinc17.org>
From: Oliver Kiddle <opk@zsh.org>
References: <f45c480a-a7ac-54fc-4140-665ff98f9dc6@inlv.org> <20211116125522.GA121624@zira.vinc17.org>
To: zsh-workers@zsh.org
Subject: Re: [BUG] POSIX arith: inf, nan should be variables
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-ID: <53574.1638131681.1@hydra>
Date: Sun, 28 Nov 2021 21:34:41 +0100
Message-ID: <53575-1638131681.212237@WIRp.dqll.oMb9>
X-Seq: 49611
Archived-At: <https://zsh.org/workers/49611>
X-Loop: zsh-workers@zsh.org
Errors-To: zsh-workers-owner@zsh.org
Precedence: list
Precedence: bulk
Sender: zsh-workers-request@zsh.org
X-no-archive: yes
List-Id: <zsh-workers.zsh.org>
List-Help: <mailto:sympa@zsh.org?subject=help>
List-Subscribe: <mailto:sympa@zsh.org?subject=subscribe%20zsh-workers>
List-Unsubscribe: <mailto:sympa@zsh.org?subject=unsubscribe%20zsh-workers>
List-Post: <mailto:zsh-workers@zsh.org>
List-Owner: <mailto:zsh-workers-request@zsh.org>
List-Archive: <http://www.zsh.org/sympa/arc/zsh-workers>

On 16 Nov, Vincent Lefevre wrote:
> On 2021-11-15 18:40:17 +0100, Martijn Dekker wrote:
> > $ zsh --emulate sh -c 'inf=1; nan=2; echo $((inf)) $((nan))'
> > Inf NaN
> > 
> > Expected: 1 2
>
> FYI, this had already been discussed in April in this subthread:

And it'll probably come up again if we don't do anything. Unless anyone
has better ideas, I'm inclined to go with the following variant of
Martijn's patch.

Oliver

diff --git a/Src/math.c b/Src/math.c
index 4f24361a4..777ad9c31 100644
--- a/Src/math.c
+++ b/Src/math.c
@@ -863,7 +863,7 @@ zzlex(void)
 
 		p = ptr;
 		ptr = ie;
-		if (ie - p == 3) {
+		if (ie - p == 3 && !EMULATION(EMULATE_SH)) {
 		    if ((p[0] == 'N' || p[0] == 'n') &&
 			(p[1] == 'A' || p[1] == 'a') &&
 			(p[2] == 'N' || p[2] == 'n')) {