220 20534 <043C43B5-72C9-4136-8D2F-2A3D745B2975@gmail.com> article Path: news.gmane.org!not-for-mail From: Miro Knejp Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: Rough Draft Proposal of Interpolated String Literals Date: Sun, 20 Sep 2015 23:14:51 +0200 Lines: 45 Approved: news@gmane.org Message-ID: <043C43B5-72C9-4136-8D2F-2A3D745B2975@gmail.com> References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1442783701 18838 80.91.229.3 (20 Sep 2015 21:15:01 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 20 Sep 2015 21:15:01 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC6ONSXJ54LBBTWD7SXQKGQEPDB4TXI@isocpp.org Sun Sep 20 23:14:56 2015 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-lb0-f200.google.com ([209.85.217.200]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Zdlwl-00066a-QV for gclcip-std-proposals@m.gmane.org; Sun, 20 Sep 2015 23:14:55 +0200 Original-Received: by lbot4 with SMTP id t4sf32614608lbo.0 for ; Sun, 20 Sep 2015 14:14:55 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:content-type:mime-version:subject:from :in-reply-to:date:content-transfer-encoding:message-id:references:to :x-original-sender:x-original-authentication-results:reply-to :precedence:mailing-list:list-id:x-spam-checked-in-group:list-post :list-help:list-archive:list-subscribe:list-unsubscribe; bh=cYudRlHnyd16IG0SPnl98PHyk8ZQ6V1fBPmSnbzowXU=; b=j8qYB0fjNHiIYcCQyrKy5CgGOouQQbpfCTJMIl4JZr+OzmZKpVZoQlsnQoqZI1i9zp swHBhXJNeRJK8CIjDRGE7GnL446iCiezhqFgVHbZ57hFBZ+/OHSqgAvUe5bqNGmL7UMR Gbmia1L09stebtO15o189E0g8vx5HNl+BVDFQawhxeb1n9jlHvfPdA0UZDVEPEhfVsJP pWQNP2tlkMwL+GNzkrJz9vCZhJt3NDrmq3FJ53XVwH+fGsABz6uJzX5Dub8OmalAy61W QQPNJ1mcQ37qKyewllr1aCdk0/UqC6iKLund6bcDqwFQdo3CjK5EGd28FFX9uL1MjX6B X-Gm-Message-State: ALoCoQnRoUtOwrwZRziuRLPADpdRIAvWN+kg8HGeNjLfezvtFQGw76NmmXOxoA/WHU7ozBhyTn6l X-Received: by 10.112.26.212 with SMTP id n20mr2685952lbg.2.1442783695282; Sun, 20 Sep 2015 14:14:55 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.180.211.50 with SMTP id mz18ls506389wic.25.canary; Sun, 20 Sep 2015 14:14:54 -0700 (PDT) X-Received: by 10.194.48.102 with SMTP id k6mr21804764wjn.124.1442783694423; Sun, 20 Sep 2015 14:14:54 -0700 (PDT) Original-Received: from mail-wi0-x22c.google.com (mail-wi0-x22c.google.com. [2a00:1450:400c:c05::22c]) by mx.google.com with ESMTPS id e5si13042861wiy.59.2015.09.20.14.14.54 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 20 Sep 2015 14:14:54 -0700 (PDT) Received-SPF: pass (google.com: domain of miro.knejp@gmail.com designates 2a00:1450:400c:c05::22c as permitted sender) client-ip=2a00:1450:400c:c05::22c; Original-Received: by wicge5 with SMTP id ge5so92100451wic.0 for ; Sun, 20 Sep 2015 14:14:54 -0700 (PDT) X-Received: by 10.194.87.102 with SMTP id w6mr18710032wjz.111.1442783694161; Sun, 20 Sep 2015 14:14:54 -0700 (PDT) Original-Received: from [192.168.184.201] ([84.18.150.172]) by smtp.gmail.com with ESMTPSA id f17sm20713996wjn.38.2015.09.20.14.14.53 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 20 Sep 2015 14:14:53 -0700 (PDT) In-Reply-To: X-Mailer: Apple Mail (2.2104) X-Original-Sender: miro.knejp@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of miro.knejp@gmail.com designates 2a00:1450:400c:c05::22c as permitted sender) smtp.mailfrom=miro.knejp@gmail.com; dkim=pass header.i=@gmail.com; dmarc=pass (p=NONE dis=NONE) header.from=gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Spam-Checked-In-Group: std-proposals@isocpp.org 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:20534 Archived-At: > On 20 Sep 2015, at 22:58 , Jim Porter wrote: >=20 > On 9/18/2015 3:21 PM, Andrew Tomazos wrote: >> Please find attached a very very rough draft of a proposal entitled >> "Interpolated String Literals". >>=20 >> Mainly after encouragement or discouragement, and any high-level >> thoughts you might have about it. >=20 > I'm not sure it's *really* necessary to do this as a language extension, = rather than just as a library. Granted, there are nice aspects of doing it = as a language feature (you can use expressions in-place and they get expand= ed as you'd expect), but given the choice, I think I'd rather see something= like printf. That could be done as a library-only addition, and would make= it fairly easy for folks to design a similar interface with slightly-diffe= rent syntax if they had different needs. >=20 > The specification also doesn't seem to say anything about the part that I= think is most important for format specifiers: formatting options. I/O str= eams' manipulators are a pain to use, since they're verbose, and unlike pri= ntf, they don't turn themselves off in most cases; hence why Boost added I/= O state savers. I'd much rather see a proposal that improves format specifi= ers. However, I think a proposal for this would end up looking more like pr= intf's placeholder-style, since it seems fairly difficult to add format spe= cifiers to an in-place style (at least, if you want to maintain readability= ). If you need format specifiers or a runtime-provided format string then stri= ng interpolation is not the tool you=E2=80=99re looking for. String interpo= lation does not replace formatting and vice versa. String interpolation is = used when the tokenization and formatting rules are determined at compile t= ime, where it is a convenient syntax to replace a bunch of function or oper= ator call boilerplate. --=20 ---=20 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 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-proposa= ls/. .