220 8142 article Path: news.gmane.org!not-for-mail From: Zhihao Yuan Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: A compile-time string literal library type Date: Mon, 16 Dec 2013 14:32:14 -0500 Lines: 29 Approved: news@gmane.org Message-ID: References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 X-Trace: ger.gmane.org 1387222339 2316 80.91.229.3 (16 Dec 2013 19:32:19 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 16 Dec 2013 19:32:19 +0000 (UTC) To: "std-proposals@isocpp.org" Original-X-From: std-proposals+bncBCSKRWMD4EHBBQVKXWKQKGQEU6A3Z4Y@isocpp.org Mon Dec 16 20:32:25 2013 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ve0-f198.google.com ([209.85.128.198]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Vsdtr-00014Y-KT for gclcip-std-proposals@m.gmane.org; Mon, 16 Dec 2013 20:32:19 +0100 Original-Received: by mail-ve0-f198.google.com with SMTP id oy12sf10438444veb.1 for ; Mon, 16 Dec 2013 11:32:18 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:sender: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=BejzpGKOOAxHqbheuiNDn6LQsH99iheOtUF5+W2T3bA=; b=Qx4gNAVdyOnpMuw4ijWkEl7nsj57nDuVADtE8M5y7fiACClRus7weUfjIGOXFCkeMG xvt2Hc98jwIcKn6k9Q9sGVqGyc/++4g9R8kmhYlN6jC3ToKWHL+N8HyJjA3G9yfYDr0F qK2QWCaHm+lAVzNx+vhVJzctLu5WnX0JzFNSgRwrMjHVVntNj8XwQKjvfUjy77aTJyXe W8x1nU52qyH9sDLr4gs3VEV+hZ+vR77mhcKQYR2TtTSRqIgeQt5gNKC5ftduAUTkuafn DpIDHT0CqTvIsYVELCnPxKSOIdHmUHuSoUtjDz1H80QwUlTBtDm/2TQ7F+RSRRTFoi0l F4+g== X-Gm-Message-State: ALoCoQkBd/g3zrClHFYVPbztSCkyCsZGqfyejE5/IQJAUFRpRIlB5jTiC8tF2OMB/94m17P7Zvbi X-Received: by 10.236.20.114 with SMTP id o78mr5818032yho.8.1387222338700; Mon, 16 Dec 2013 11:32:18 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.49.81.229 with SMTP id d5ls2141107qey.64.gmail; Mon, 16 Dec 2013 11:32:17 -0800 (PST) X-Received: by 10.49.84.195 with SMTP id b3mr35747269qez.32.1387222337946; Mon, 16 Dec 2013 11:32:17 -0800 (PST) Original-Received: from mail-s68.mailgun.info (mail-s68.mailgun.info. [184.173.153.196]) by mx.google.com with ESMTP id k9si10155414qat.145.2013.12.16.11.32.17 for ; Mon, 16 Dec 2013 11:32:17 -0800 (PST) Received-SPF: pass (google.com: domain of bounce+3f9131.69110-std-proposals=isocpp.org@miator.net designates 184.173.153.196 as permitted sender) client-ip=184.173.153.196; Original-Received: from mail-vc0-f169.google.com (mail-vc0-f169.google.com [209.85.220.169]) by mxa.mailgun.org with ESMTP id 52af553e.5c36570-in1; Mon, 16 Dec 2013 19:32:14 -0000 (UTC) Original-Received: by mail-vc0-f169.google.com with SMTP id hu19so3567808vcb.28 for ; Mon, 16 Dec 2013 11:32:14 -0800 (PST) X-Received: by 10.58.11.73 with SMTP id o9mr9058110veb.8.1387222334245; Mon, 16 Dec 2013 11:32:14 -0800 (PST) Original-Received: by 10.221.73.199 with HTTP; Mon, 16 Dec 2013 11:32:14 -0800 (PST) In-Reply-To: X-Mailgun-Sid: WyI3MTBkYiIsICJzdGQtcHJvcG9zYWxzQGlzb2NwcC5vcmciLCAiNjkxMTAiXQ== Original-Sender: zy@miator.net X-Original-Sender: zy@miator.net X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of bounce+3f9131.69110-std-proposals=isocpp.org@miator.net designates 184.173.153.196 as permitted sender) smtp.mail=bounce+3f9131.69110-std-proposals=isocpp.org@miator.net; dkim=pass header.i=@miator.net 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:8142 Archived-At: On Mon, Dec 16, 2013 at 2:22 PM, Sean Middleditch wrote: > Given the current lack of some essential C++11 features in a very popular > compiler we end up using a few hacks. One common one I see a lot is to use > a macro like HASH_STR("literal") and then a preprocessor to find and replace > all those with hash results. Obviously that is far from ideal, though there > are plenty of other needs for a specialized pre-processor in C++ today (it's > one way to implement reflection for serialization and editor data binding). I think you can do it with array reference and constexpr function. The string_literal class proposed here is different: every string literal differ in content also differ in types. To array reference and std::array, they are only differ in types when the lengths are different. -- Zhihao Yuan, ID lichray The best way to predict the future is to invent it. ___________________________________________________ 4BSD -- http://4bsd.biz/ -- --- 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/. .