220 8735 <52DD090A.6070506@eudoxos.de> article Path: news.gmane.org!not-for-mail From: Roland Bock Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: "Raw" preprocessor macro arguments Date: Mon, 20 Jan 2014 12:31:22 +0100 Lines: 245 Approved: news@gmane.org Message-ID: <52DD090A.6070506@eudoxos.de> References: <3fc9f495-0bb2-4432-bb79-385fe222feab@isocpp.org> <52DCE5B4.8090704@eudoxos.de> <86a02b59-8c7f-4478-9f69-0ff53660c4eb@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="------------080406090704020109010709" X-Trace: ger.gmane.org 1390217487 2281 80.91.229.3 (20 Jan 2014 11:31:27 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 20 Jan 2014 11:31:27 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCO7PYWVVELRBEMS6SLAKGQE63ZVNZQ@isocpp.org Mon Jan 20 12:31:34 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-fa0-f69.google.com ([209.85.161.69]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1W5D4m-0000ae-9A for gclcip-std-proposals@m.gmane.org; Mon, 20 Jan 2014 12:31:32 +0100 Original-Received: by mail-fa0-f69.google.com with SMTP id a10sf5131974fad.8 for ; Mon, 20 Jan 2014 03:31:31 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:message-id:date:from:user-agent:mime-version:to :subject:references:in-reply-to:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe:content-type; bh=Ql+48ugL7qRbOUy4UXbXGEltOaDX5LQYqVMYLm2Ej28=; b=Eme+rbzfvg7SDgRYmWDTHJ1DCZeiCpy0U/lTFIM9mll8+jzKAQ1OemMcqk4kIHCDQl ba2xdSF2b7NUg/bRkQgrqJZNt3ia76zlpwhyWoF02UbJmYS2gluj3DpVI7VAXSbh59Jg 7H23waJg6D2cPMy/wqLUx0H2dPY+DRjkzLXbLOmjEs6ALE4QMugWiftwmCvKJonkWCMB ug5hIecuEQErJ+qCoGCJAtG6l+yjx02IBC5qHaQN2tzUAfoOZJNlUDR4FzuQTwmr0Sjo 2xyC1gCGquXj+sDXmii2eVgq9o26TvHTPRDzaIy01TiAJfL7bkpZWJPnL8ur3HX2a614 r5Tg== X-Gm-Message-State: ALoCoQk61QJZDgVEG0BI0oNhm9D3pbm++NRvzWoTWnBHmiQlg28qkMRqFy60ylgLjDGliw/DPdWG X-Received: by 10.204.53.11 with SMTP id k11mr3938076bkg.6.1390217490461; Mon, 20 Jan 2014 03:31:30 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.180.8.6 with SMTP id n6ls472030wia.32.canary; Mon, 20 Jan 2014 03:31:29 -0800 (PST) X-Received: by 10.15.24.72 with SMTP id i48mr1870237eeu.74.1390217489522; Mon, 20 Jan 2014 03:31:29 -0800 (PST) Original-Received: from moutng.kundenserver.de (moutng.kundenserver.de. [212.227.126.171]) by mx.google.com with ESMTPS id 43si1807980eeh.73.2014.01.20.03.31.29 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 20 Jan 2014 03:31:29 -0800 (PST) Received-SPF: neutral (google.com: 212.227.126.171 is neither permitted nor denied by best guess record for domain of rbock@eudoxos.de) client-ip=212.227.126.171; Original-Received: from [172.30.200.118] ([194.97.158.70]) by mrelayeu.kundenserver.de (node=mreu4) with ESMTP (Nemesis) id 0MUPVW-1Vx49p0e7G-00R4me; Mon, 20 Jan 2014 12:31:23 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 In-Reply-To: <86a02b59-8c7f-4478-9f69-0ff53660c4eb@isocpp.org> X-Provags-ID: V02:K0:PDk///FwrIaMWTsq5Xkr3vuf8qoGw5GQP1mEHHe++fo PCzdtmI+OQsCMG7I7+c80V4bbnUV/4xqSxQEU38LRWFQujXe0L MqLoQOUrjS1oRIRrJ8WJHuQEDP2/nL66WOdzHBOnYym/7Bqy51 PjUlwsFrPwXq22PEQdgrKFXnUE+5+wfwF8JAgUBHpi/KstOaLE PJOStv1JXwx7G1VwZbT8J8w68Ty3IDn7j9e/mAb8iT7/kOzmqm SlMbMJ7XxeHaauxgqsm+441eqcRmvjjbh5rBdpCHbrV1lVGnlF ZUpRcOUT8WkNDCQo7BCZB9/nourRHi63LwIcnKq6kjvSs4v/Fr SH+GnV3FIefwp1WfV+S0= X-Original-Sender: rbock@eudoxos.de X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 212.227.126.171 is neither permitted nor denied by best guess record for domain of rbock@eudoxos.de) smtp.mail=rbock@eudoxos.de Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:8735 Archived-At: This is a multi-part message in MIME format. --------------080406090704020109010709 Content-Type: text/plain; charset=UTF-8 Yes, sorry, was too quick... On 2014-01-20 11:49, Vittorio Romeo wrote: > This is not what I expect, since it also prints the parenthesis. > The solution would be having a "variadic stringify function" > | > #define SSVPP_IMPL_STRINGIFYWITHCOMMAS(mIdx, mData, mArg) SSVPP_STRINGIFY(mArg)SSVPP_IF(mIdx, ", ", SSVPP_EMPTY()) > #define SSVPP_STRINGIFYWITHCOMMAS(...) SSVPP_FOREACH(SSVPP_IMPL_STRINGIFYWITHCOMMAS, SSVPP_EMPTY(), __VA_ARGS__) > | > > However, it needs to be explicitly called, and the "raw argument" > consistency fails here. > > On Monday, 20 January 2014 10:00:36 UTC+1, Roland Bock wrote: > > On 2014-01-20 09:53, Vittorio Romeo wrote: > > http://ideone.com/B5hVDS > > > > This example shows un-intuitive behavior. > > The "raw argument" is actually passed as multiple arguments, and > does > > not expand correctly. > > > > I would expect the program to print "1, 2, 3" or "1,2,3" - > instead, it > > fails to compile. > > > Did not check the other examples, but how about this: > > #define RAW(...) (__VA_ARGS__) > > > http://ideone.com/DXXOXP (works as expected) > > -- > > --- > You received this message because you are subscribed to the Google > Groups "ISO C++ Standard - Future Proposals" group. > To unsubscribe from this group and stop receiving emails from it, send > an email to std-proposals+unsubscribe@isocpp.org. > To post to this group, send email to std-proposals@isocpp.org. > Visit this group at > http://groups.google.com/a/isocpp.org/group/std-proposals/. -- --- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an email to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/. --------------080406090704020109010709 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Yes, sorry, was too quick...

On 2014-01-20 11:49, Vittorio Romeo wrote:
This is not what I expect, since it also prints the parenthesis.=C2=A0
The solution would be having a "variadic stringify function" 
#define SSVPP_IMPL_STRINGIFYWITHCOMMAS(mIdx, mData=
, mArg) =C2=A0 SSVPP_STRINGIFY(mArg)SSVPP_IF(mIdx,<=
/span> ", ", SSVPP_EMPTY())
#define SSVPP_STRINGIFYWITHCOMMAS(...) =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0SSVP=
P_FOREACH(SSVPP_IMPL_STRINGIFYWITHCOMMAS, SSVPP_EMPTY(), __VA_ARGS__<=
span style=3D"color: #660;" class=3D"styled-by-prettify">)

However, it needs to be explicitly called, and the "raw argument" consistency fails here.

On Monday, 20 January 2014 10:00:36 UTC+1, Roland Bock wrote:
On 2014-01-20 09:53, Vittorio Romeo wrote:
> http://ideone.com/B5hVDS
>
> This example shows un-intuitive behavior.
> The "raw argument" is actually passed as multiple arguments, and does
> not expand correctly.
>
> I would expect the program to print "1, 2, 3" or "1,2,3" - instead, it
> fails to compile.
>
Did not check the other examples, but how about this:

#define RAW(...) (__VA_ARGS__)


http://ideone.com/DXXOXP (works as expected)
--
=C2=A0
---
You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group.
To unsubscribe from this group and stop receiving emails from it, send an email to std-proposals+unsubscribe@isocpp.org= .
To post to this group, send email to std-proposals@isocpp.org= ..
Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/.

--
 
---
You received this message because you are subscribed to the Google Groups &= quot;ISO C++ Standard - Future Proposals" group.
To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposals+unsubscribe@isocpp.org.
To post to this group, send email to std-proposals@isocpp.org.
Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/<= /a>.
--------------080406090704020109010709-- .