220 14106 article Path: news.gmane.org!not-for-mail From: Myriachan Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: #pragma once Date: Tue, 21 Oct 2014 19:03:52 -0700 (PDT) Lines: 80 Approved: news@gmane.org Message-ID: References: <3d0ab5b0-73d9-434a-9ae4-cd47d8275590@isocpp.org> <59ae3383-67a5-4a4c-b301-06cf148c9df6@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_4963_1945122689.1413943432607" X-Trace: ger.gmane.org 1413943443 3828 80.91.229.3 (22 Oct 2014 02:04:03 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 22 Oct 2014 02:04:03 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBDKLT4PURQHRBCVBTSRAKGQEAOX3JTY@isocpp.org Wed Oct 22 04:03:57 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ob0-f200.google.com ([209.85.214.200]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1XglHH-0007SI-Ii for gclcip-std-proposals@m.gmane.org; Wed, 22 Oct 2014 04:03:55 +0200 Original-Received: by mail-ob0-f200.google.com with SMTP id wn1sf10633484obc.7 for ; Tue, 21 Oct 2014 19:03:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-subscribe:list-unsubscribe :content-type; bh=l7qt8/SRHQRcM9XGbkamUWmT2Xge5d9CiSsh8YknNf8=; b=y09vm0Z24Vuw6F3+FmwksTvU6Wbg9l0zqOXGGopHgKhlkGgYGsPY24RM3tYW6+xavk v+QLiDil7tv5CBx1MExeKSGkFuJ7eR517lfqr+ZKr/uGlxgiEXF0G0WzoYAHAcuavTjL NvnCuNXgfUmUGb9byrthbdHmGy+gi6W+LU1ehugauEZpvc+1QPbwtlMDq+OBohvhW/4e w1rD9KJ52++gMcEMhxIkKAPSJzon0vHnTKx1V0ki8Xi5Qb5bSa3+uD4kazI5agpiQnaE PmmT9BNG3mARwn6gl9QAwL9mlt6GVNpwMAyGqcAX0gOWhY23GLKPp7QErgcLWd0doMpr iH/A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:message-id:in-reply-to:references :subject:mime-version:x-original-sender:reply-to:precedence :mailing-list:list-id:list-post:list-help:list-archive :list-subscribe:list-unsubscribe:content-type; bh=l7qt8/SRHQRcM9XGbkamUWmT2Xge5d9CiSsh8YknNf8=; b=UwYDzaFzwUWR6GfK/byNUgDq2FSX85uZ5e+17g8qhSAFzDul26pZUxlxLz6idZ9T+H /BSGaERbz0Jz2zNienxHGp4kSVOlwG9mF80wmXEvYTIgLUwMDkrDeVrgeDclwD4OUDEe rw1hwMh+KBoLELTLdNpP6eJZxwXQtcch0OKjmJPZwFA3uB6x+BYdXxqsjTPbeiBrahGK A+Qv593FVW0GpXgLQgsiddUCfqquwBaCnDfawnGlQuDklLKpSe8Min9RLmv5BGZWf0Gs T/XLimBqvFUEwBtGHe6eKr7fEYlB/eUbGHc06pJFkYrwrgOJJF/w3Mq0MrdME3TfPGqR AORw== X-Gm-Message-State: ALoCoQlgKU/xxos9rML4EBS7iD3lXs8+HbqkErkwFIVUKw/bRRMvzxPBPDD4Gv6l3ap81BX/sF7V X-Received: by 10.182.247.101 with SMTP id yd5mr24416817obc.41.1413943434644; Tue, 21 Oct 2014 19:03:54 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.50.80.109 with SMTP id q13ls1145840igx.20.canary; Tue, 21 Oct 2014 19:03:54 -0700 (PDT) X-Received: by 10.50.78.135 with SMTP id b7mr28105igx.14.1413943434157; Tue, 21 Oct 2014 19:03:54 -0700 (PDT) In-Reply-To: <59ae3383-67a5-4a4c-b301-06cf148c9df6@isocpp.org> X-Original-Sender: myriachan@gmail.com 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:14106 Archived-At: ------=_Part_4963_1945122689.1413943432607 Content-Type: text/plain; charset=UTF-8 On Tuesday, October 21, 2014 2:04:00 PM UTC-7, Christopher wrote: > > By the way, why don't _Pragma and #line support concatenating multiple >> strings in their respective string parameters? >> > > String concatenation happens later (Phase 6). For _Pragma, this is not too > bad if you're willing to build up *unquoted *pp-tokens and pass them to a > wrapper-macro: > > #define RAW_TOKENS_PRAGMA2(...) _Pragma(#__VA_ARGS__) > #define RAW_TOKENS_PRAGMA(...) RAW_TOKENS_PRAGMA2(__VA_ARGS__) > Could we then define _Pragma as taking one or more string parameters (not separated by anything but possibly whitespace) that are interpreted concatenated? Melissa -- --- 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/. ------=_Part_4963_1945122689.1413943432607 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On Tuesday, October 21, 2014 2:04:00 PM UTC-7, Christopher= wrote:
By the way, why don't _Pragma and #line support concatenatin= g multiple strings in their respective string parameters?

String concatenation happens later (Phase 6). For _Pragma, th= is is not too bad if you're willing to build up unquoted pp-tokens a= nd pass them to a wrapper-macro:

#define RAW_= TOKENS_PRAGMA2(...)  _Pragma(#__VA_ARGS__= )
#d= efine RAW_TOKENS_PRAGMA(...)   RAW_TOKENS_P= RAGMA2(= __VA_ARGS__)
<= /div>

Could we then define _Pragma as taking one= or more string parameters (not separated by anything but possibly whitespa= ce) that are interpreted concatenated?

Melissa

--

---
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-proposa= ls+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>.
------=_Part_4963_1945122689.1413943432607-- .