220 33020 <9f81f2b9-958c-4018-9f78-a6ac2e425899@isocpp.org> article Path: news.gmane.org!.POSTED!not-for-mail From: Igor Baidiuk Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: std::optional - support for sentinel values Date: Thu, 29 Jun 2017 03:47:51 -0700 (PDT) Lines: 59 Approved: news@gmane.org Message-ID: <9f81f2b9-958c-4018-9f78-a6ac2e425899@isocpp.org> References: <6e23864f-827a-4bdb-89de-a60d8f5be993@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_2127_992683124.1498733271198" X-Trace: blaine.gmane.org 1498733275 30819 195.159.176.226 (29 Jun 2017 10:47:55 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 29 Jun 2017 10:47:55 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDK4F76SSIIBBV5V2PFAKGQEMR2JT4A@isocpp.org Thu Jun 29 12:47:50 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-qk0-f200.google.com ([209.85.220.200]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dQWzD-0007bv-Kk for gclcip-std-proposals@m.gmane.org; Thu, 29 Jun 2017 12:47:47 +0200 Original-Received: by mail-qk0-f200.google.com with SMTP id 134sf37401961qkh.1 for ; Thu, 29 Jun 2017 03:47:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; 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; bh=60yZOsL2exZ0GcDQ29zsiwebJNUn6hB+A59meMC2IxU=; b=Mxsn8enbBY1v9e6S44dmkYmbsmvxZbPzk1/vvORuHOsHPfBCCA9qVMkHnF62/VBSpR ci9w/G13Rfo6cQHpO4zxVju/Y5jiIiRYlFYl2/+/Udh52XcZ9zAzHOeXxakTxY0Wv1Kg XDhzONcmKC4yGI0pe7dcxmJtQ5ofU2k1f2MbzqpqqTIj+YJyibcJ49fQtKROKPhADKeW bXap4jnVuINIgX0B5WuXPHYw57A6eoT2HWdWzLSyphZ4byzseniLpYaGTUg6Walkmx6l ANCPEhfpaxYrHl7BtgoOJfTAvhk5N8fwvVkKpJilNufg63s3pjwzx3JY2lt8SgkbFPXu tnMA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; 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; bh=60yZOsL2exZ0GcDQ29zsiwebJNUn6hB+A59meMC2IxU=; b=VHNDwMQ2BHFoQvnGSAZdbukrCpkmn9O5AXpujg87fZDg/EY7wflndSsQnwsU+48MV9 aEK09STvZFKtTjBuTJWeoFV03MYxZbvfK7ydbTfKShjHNN/zqtw6q4TxInYyXywWwobb CZjmUxG9fQxOCFU2QbVulrwby34783PFnniUiZJ0uowQ1s8/AgRRwxqykMCfOhu8WGT5 lQPmm4e5RC63haab7nM/BFFAVPpru/5MxyZWnq582cuPWJW3IdytMf8KnTIt1Fnw2V7t fn9ukc/Hgh0mT2liDnn3d/qAwgaGMWaQatrKFZ/SKvHJLLHc0tpB4T1ixxeRfr/MqfUA ND9A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:message-id:in-reply-to:references :subject:mime-version:x-original-sender:reply-to:precedence :mailing-list:list-id:x-spam-checked-in-group:list-post:list-help :list-archive:list-subscribe:list-unsubscribe; bh=60yZOsL2exZ0GcDQ29zsiwebJNUn6hB+A59meMC2IxU=; b=LivYMgy+1yQoCHbGuT0S9BTMq9M/iML5hbgj1wTvH7r1mfCXMWVeHqpJ7Y96HjLPhU 6c57mdxFcIN72QyJCGGo9ljih7txv27IfmQdphCbjMMYA92MCWeCYDpOL4KtWU01QL/l V3ioIEAAfXQR2trUpun0SjCNK+yvzpEFJOBkx2sDb9/PkwYgZtugSjaRLcQdtD6EHKH6 hAfVyYQ0bwWitJeUCs9Mj3SfdxFjJ451yauToPuNGNA8vp8j+kmIuwzYC/ScTSHKOpZ0 +gbSWjRCALaI4XuUDHMLR1YEnNUisLnrfoJPRKBVBCFrdf5f64ObnX1SOZoUzUaQBJIz dgtg== X-Gm-Message-State: AKS2vOxMroWqljDIQdwHbBCbVMl6qtQZ4qQAC+jT6mDiU+BP6+rMs1H+ 3998nlPgvNw+7CWV X-Received: by 10.237.53.56 with SMTP id a53mr9121988qte.0.1498733272901; Thu, 29 Jun 2017 03:47:52 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.107.6.151 with SMTP id f23ls540196ioi.27.gmail; Thu, 29 Jun 2017 03:47:51 -0700 (PDT) X-Received: by 10.36.125.65 with SMTP id b62mr55549itc.5.1498733271710; Thu, 29 Jun 2017 03:47:51 -0700 (PDT) In-Reply-To: X-Original-Sender: target.san@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:33020 Archived-At: ------=_Part_2127_992683124.1498733271198 Content-Type: multipart/alternative; boundary="----=_Part_2128_1301472801.1498733271198" ------=_Part_2128_1301472801.1498733271198 Content-Type: text/plain; charset="UTF-8" Okay, this may be a new type. I doubt it'll be possible to alter std::optional definition, even with default tempate parameter. It's sad that includes still give us sticks in a wheel. Although, I think the whole idea is worth discussing, as it allows more tools for safe programming. On Thursday, June 29, 2017 at 1:30:31 PM UTC+3, Ville Voutilainen wrote: > > > You need a new type. > -- 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. To view this discussion on the web visit https://groups.google.com/a/isocpp.org/d/msgid/std-proposals/9f81f2b9-958c-4018-9f78-a6ac2e425899%40isocpp.org. ------=_Part_2128_1301472801.1498733271198 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Okay, this may be a new type. I doubt it'll be possibl= e to alter std::optional definition, even with default tempate parameter. I= t's sad that includes still give us sticks in a wheel.
Although, I t= hink the whole idea is worth discussing, as it allows more tools for safe p= rogramming.

On Thursday, June 29, 2017 at 1:30:31 PM UTC+3, Ville Vo= utilainen wrote:

You need a= new type.

--
You received this message because you are subscribed to the Google Groups &= quot;ISO C++ Standard - Future Proposals" group.
To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposa= ls+unsubscribe@isocpp.org.
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To view this discussion on the web visit https://groups.google.= com/a/isocpp.org/d/msgid/std-proposals/9f81f2b9-958c-4018-9f78-a6ac2e425899= %40isocpp.org.
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