220 10405 article Path: news.gmane.org!not-for-mail From: Ville Voutilainen Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Generated initializer_list Date: Mon, 28 Apr 2014 13:35:41 +0300 Lines: 30 Approved: news@gmane.org Message-ID: References: <357dd72f-c749-4dc5-aa6d-5ac4528aba5a@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Trace: ger.gmane.org 1398681354 31234 80.91.229.3 (28 Apr 2014 10:35:54 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 28 Apr 2014 10:35:54 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC5JHI7A7ALRB7O57CNAKGQEVYK4FRI@isocpp.org Mon Apr 28 12:35:44 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ob0-f199.google.com ([209.85.214.199]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WeiuU-0001pU-Ut for gclcip-std-proposals@m.gmane.org; Mon, 28 Apr 2014 12:35:43 +0200 Original-Received: by mail-ob0-f199.google.com with SMTP id gq1sf40028247obb.6 for ; Mon, 28 Apr 2014 03:35:42 -0700 (PDT) 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: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=SVjvY9wO5vRt4iOtnb/kFtmXMHe89Lmpg47eukWxNGo=; b=Jqg3PyH7Cvb4mPyWj9YUYyzG0oSp+HwoCF1YhDUXJEzmWmcaUFslByAa96EpShUIwt ZZaduq7zC+PCI+Em9ysdBBP2/vbvpf7+64bHAZJNiV1MQ5Z7FToYMs0Bxz/3AVXZR1Or MH33BpgmCjPs9sftAIhJFiL9YlsCCHPw9vxO1gj7/OPD27tYYo5Kd9HVbxaWAGknu/Vq lLOzFyX8SrLVniSBMMty6psSUPZU1hxJgRwKC4C4F8INgD1TNlJ8hEcM7UY5WAiHk0x6 rsr+sd+l9lU0zaQRgqlCYYWUtYNmGdx4vyPx/DgDguy3QA+Tz6w/qOS/lTMK13FGTMPP w4pQ== X-Gm-Message-State: ALoCoQn6jDggazYls1E9IpZvelZxswrGWzTGJQXu7yymIDnoMV002r6bTIk15ei52kUkTTxrNIfb X-Received: by 10.182.158.135 with SMTP id wu7mr12482361obb.19.1398681342067; Mon, 28 Apr 2014 03:35:42 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.140.82.42 with SMTP id g39ls2538993qgd.25.gmail; Mon, 28 Apr 2014 03:35:41 -0700 (PDT) X-Received: by 10.140.51.74 with SMTP id t68mr29958841qga.50.1398681341463; Mon, 28 Apr 2014 03:35:41 -0700 (PDT) Original-Received: from mail-qa0-x22b.google.com (mail-qa0-x22b.google.com [2607:f8b0:400d:c00::22b]) by mx.google.com with ESMTPS id d5si7529482qab.153.2014.04.28.03.35.41 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 28 Apr 2014 03:35:41 -0700 (PDT) Received-SPF: pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400d:c00::22b as permitted sender) client-ip=2607:f8b0:400d:c00::22b; Original-Received: by mail-qa0-f43.google.com with SMTP id ih12so4341166qab.30 for ; Mon, 28 Apr 2014 03:35:41 -0700 (PDT) X-Received: by 10.140.96.51 with SMTP id j48mr30613191qge.24.1398681341337; Mon, 28 Apr 2014 03:35:41 -0700 (PDT) Original-Received: by 10.224.181.5 with HTTP; Mon, 28 Apr 2014 03:35:41 -0700 (PDT) In-Reply-To: <357dd72f-c749-4dc5-aa6d-5ac4528aba5a@isocpp.org> X-Original-Sender: ville.voutilainen@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400d:c00::22b as permitted sender) smtp.mail=ville.voutilainen@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-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:10405 Archived-At: On 28 April 2014 13:32, wrote: > It appears to me that one feature that is missing from most languages is a > method to compile-time compute a sequence (e.g. an array, etc.) One way to > do this is a program (e.g. yacc) that generates a compilation unit. Surely > the time is now ripe, with C++11's initializer_lists and C++14's relaxed > rules for constexprs to be able to directly code the algorithm withing the > compilation unit. > > Maybe something along the lines of: > > template > std::initializer_list make_initializer_list(Object object, > Args... args) { > initializer_list result {}; > while (object.more()) > result.push_back(object()); > return result; > } initializer_list is probably not the right tool, it is by-design immutable. -- --- 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/. .