220 6785 article Path: news.gmane.org!not-for-mail From: Christian Kaeser Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: enumeration pack and `__enumerator__` template variable Date: Sun, 29 Sep 2013 12:05:24 -0700 (PDT) Lines: 88 Approved: news@gmane.org Message-ID: References: <16581f55-7acb-4b90-8235-2a5384065960@isocpp.org> <3297ee13-15a1-4645-825b-7324f6831864@isocpp.org> <4457181.bkIbsFcUUi@tjmaciei-mobl2> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_67_22232760.1380481525878" X-Trace: ger.gmane.org 1380481526 15244 80.91.229.3 (29 Sep 2013 19:05:26 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 29 Sep 2013 19:05:26 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCMLHAHBU4DRB57TUGJAKGQEOC7QLLY@isocpp.org Sun Sep 29 21:05:32 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 1VQMJ7-0007MJ-I1 for gclcip-std-proposals@m.gmane.org; Sun, 29 Sep 2013 21:05:29 +0200 Original-Received: by mail-ie0-f199.google.com with SMTP id e14sf16237914iej.6 for ; Sun, 29 Sep 2013 12:05:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.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=ADcWLSQS6/rYzHooYMNkB4xh9p/RlENNMPckTNsRMaI=; b=07bjkPtgMZHolizW8HYhV2FdiojA+ikvf1aCK2qu6z20GFYfR54opEpdXAzd/P7tYN USTsTjYdRqk/lZteJlYJiQodZSYyq2TnkxiNvB9QS4G24uRmPp/PNqVC18S9Ax4St6Ci 1c0UxCcDGnBI+I5v80+Ng5opseLEuKn9W5UOnObfHRKxwTo6f2WOKVX2pWZc08w1DXFX fHGqcXYUfp2Y2JZk7eG58gPi/nltMV0OjLbEVr/NuinyDLbGJlV5tLXz7cWCp0y3Zx6Y jiBV8M3HmzvVVvaSBMvwS3xwwMndYWmzD91vCYK3oy/IJc0yy4fg2pcg25C/y3VyiLd0 PWQg== X-Received: by 10.50.114.66 with SMTP id je2mr9966565igb.5.1380481528241; Sun, 29 Sep 2013 12:05:28 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.50.23.12 with SMTP id i12ls1295718igf.8.canary; Sun, 29 Sep 2013 12:05:27 -0700 (PDT) X-Received: by 10.50.138.138 with SMTP id qq10mr367004igb.3.1380481527657; Sun, 29 Sep 2013 12:05:27 -0700 (PDT) In-Reply-To: <4457181.bkIbsFcUUi@tjmaciei-mobl2> X-Original-Sender: christiankaeser87@googlemail.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:6785 Archived-At: ------=_Part_67_22232760.1380481525878 Content-Type: text/plain; charset=ISO-8859-1 Now I remember once reading a post on your blog about the topic, very interesting stuff: http://www.macieira.org/blog/2011/07/table-driven-methods-with-no-relocations/ To allow implementations to optimize for fewer relocations, maybe a better interface would indeed be to provide functions instead of an array, as just suggested by Andrew before. So static constexpr const char* name(size_t index); Or, should string_view be ready in time: static constexpr string_view name(size_t index); On Sunday, 29 September 2013 20:29:41 UTC+2, Thiago Macieira wrote: > > On domingo, 29 de setembro de 2013 07:33:30, Andrew Tomazos wrote: > > static constexpr const char* names[]; > > Arrays of pointers implies relocations. You may want to avoid this. > > -- > Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org > Software Architect - Intel Open Source Technology Center > PGP/GPG: 0x6EF45358; fingerprint: > E067 918B B660 DBD1 105C 966C 33F5 F005 6EF4 5358 > > -- --- 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_67_22232760.1380481525878 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Now I remember once reading a post on your blog about the = topic, very interesting stuff: http://www.macieira.org/blog/2011/07/table-d= riven-methods-with-no-relocations/

To allow implementations to optim= ize for fewer relocations, maybe a better interface would indeed be to prov= ide functions instead of an array, as just suggested by Andrew before.
<= br>So  static conste= xpr const char* name(size_t index);
Or, should string_view be ready in time: static constexpr string_view name(= size_t index);


On Sunday, 29 September 2013 20:29:41 UTC+= 2, Thiago Macieira wrote:
On d= omingo, 29 de setembro de 2013 07:33:30, Andrew Tomazos wrote:
>             static constexpr const c= har* names[];

Arrays of pointers implies relocations. You may want to avoid this.

--=20
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
   Software Architect - Intel Open Source Technology Center
      PGP/GPG: 0x6EF45358; fingerprint:
      E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4= 5358


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