220 8133 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: Sun, 15 Dec 2013 23:52:52 -0500 Lines: 47 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 1387169570 21408 80.91.229.3 (16 Dec 2013 04:52:50 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 16 Dec 2013 04:52:50 +0000 (UTC) To: "std-proposals@isocpp.org" Original-X-From: std-proposals+bncBCSKRWMD4EHBBJ4OXKKQKGQEDTQRCOI@isocpp.org Mon Dec 16 05:52:58 2013 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ie0-f199.google.com ([209.85.223.199]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1VsQAr-0004f7-3k for gclcip-std-proposals@m.gmane.org; Mon, 16 Dec 2013 05:52:57 +0100 Original-Received: by mail-ie0-f199.google.com with SMTP id lx4sf16547611iec.10 for ; Sun, 15 Dec 2013 20:52:56 -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=+lm1lXzSAICKnE9UAsGaciFuwe4QZ2XzCkeU+D3f5As=; b=lyr0Urue5aVadBtqRaJHj6+dHv20tsYRHCVAm1dwBW/Yx2AZ/PCJOVFaGr1iUGX74Z dTheH2mtCQyh8gJQ5hT+H5FhPP3rX7NOUrVsSUata5ogk13G1SY3635WTtPNotKgRVxj s+UBorumYZuIk7Wzok977IEtTFfKnSC9h6cERlrhh1qZHDBapv1E4kttCqd3Ywbzj23h gUA6m2lMryfyTM2BVv5Kq6fcNnpz8ZGxZI9SFk+2bQoNQXZe/b59/48Q3zmmXAi7R6aC 4ZV73hbsiRyOAqcl9xR4q7sHQYlzpQU2JYBnnYs3oLBcSz39KJmADj4XalpguoLzDZS0 auaA== X-Gm-Message-State: ALoCoQl8QjrxMlIk1AvXePtP4MbYNFK9JG285M2TrVFY7gHD6JgyHT6qezv4ENSJUYM+QIwtdj09 X-Received: by 10.182.111.134 with SMTP id ii6mr179911obb.38.1387169576015; Sun, 15 Dec 2013 20:52:56 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.49.29.197 with SMTP id m5ls1877278qeh.43.gmail; Sun, 15 Dec 2013 20:52:55 -0800 (PST) X-Received: by 10.236.207.73 with SMTP id m49mr10816166yho.5.1387169575241; Sun, 15 Dec 2013 20:52:55 -0800 (PST) Original-Received: from mail-s68.mailgun.info (mail-s68.mailgun.info. [184.173.153.196]) by mx.google.com with ESMTP id x29si11335709yha.186.2013.12.15.20.52.54 for ; Sun, 15 Dec 2013 20:52:55 -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-vb0-f46.google.com (mail-vb0-f46.google.com [209.85.212.46]) by mxa.mailgun.org with ESMTP id 52ae8724.5647130-in2; Mon, 16 Dec 2013 04:52:52 -0000 (UTC) Original-Received: by mail-vb0-f46.google.com with SMTP id w20so2833441vbb.33 for ; Sun, 15 Dec 2013 20:52:52 -0800 (PST) X-Received: by 10.58.146.71 with SMTP id ta7mr3138951veb.23.1387169572406; Sun, 15 Dec 2013 20:52:52 -0800 (PST) Original-Received: by 10.221.73.199 with HTTP; Sun, 15 Dec 2013 20:52:52 -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:8133 Archived-At: On Sun, Dec 15, 2013 at 10:26 PM, Michael Price - Dev wrote: > I'm considering writing up a proposal to standardize a library type that > represents a compile-time sequence of character literals. I'm looking for a > first round of feedback. You can view my prototype implementation at > https://github.com/michaelbprice/cxx_snippets/blob/master/string_literal/string_literal.cpp > > I'm using the top-of-trunk clang to compile with the following command-line: I think you know that the language feature you used http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2013/n3599.html is not a part of C++14. Anyway. What's the different between `make_array("str")` and "str"_cs? http://isocpp.org/files/papers/N3824.html 1. string_literalS are different in types (works with template); 2. string_literal cannot be modified; 3. string_literal has some algorithms as member functions. So what is the problem you want to solve? Compile-time parsing? If so, Bristol EWG says: 1. don't think template instantiations is the only way to do it; 2. doubt user to overuse it (a compile time SQL parser is fun, but what you gain?); 3. need use cases. -- 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/. .