220 33149 <8df877a7-658d-48bb-887b-0df4fd67a857@isocpp.org> article Path: news.gmane.org!.POSTED!not-for-mail From: Nicol Bolas Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: template class to do default integral types initalization Date: Fri, 7 Jul 2017 12:46:37 -0700 (PDT) Lines: 85 Approved: news@gmane.org Message-ID: <8df877a7-658d-48bb-887b-0df4fd67a857@isocpp.org> References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_5006_1811496403.1499456797683" X-Trace: blaine.gmane.org 1499456806 19693 195.159.176.226 (7 Jul 2017 19:46:46 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 7 Jul 2017 19:46:46 +0000 (UTC) Cc: ar123456@gmail.com To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBCEKFTV6ZUMBBHWK77FAKGQEMQT2OII@isocpp.org Fri Jul 07 21:46:39 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-it0-f69.google.com ([209.85.214.69]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dTZD0-0004cF-CT for gclcip-std-proposals@m.gmane.org; Fri, 07 Jul 2017 21:46:34 +0200 Original-Received: by mail-it0-f69.google.com with SMTP id k3sf64504514ita.4 for ; Fri, 07 Jul 2017 12:46:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc: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=dB4s1UoEI7qc8ZqQIE+Ahp4SCSFJ0byMnfzJ94WGU/A=; b=KUFQtUtvNMkXffApwbTlffKKHh82koqr9RnwS5gk4uEHX0ifxDm1kORDgTTMhwiS1e bquasv94vASMchXxOJuY4bgiMppIZD1ZFH+Ea9Ph7VK/oM/JxUbBskt8Jjwkl3GaUuaR xfZ8lwyvgOdXLH+0JQUuHlnalVQVvUcKx2zC4PQGEyl5zNzHbap/fsOtg5PtQUdX3G2s blK53J9M/XPRnQmiuwhR/dZYilMZzrKveXMUYeisWk5tm1bCncLLMbcRaVG5SLhV/SCN fKvmbBw04cWxQkQMtoeE62kz2BohOc9vqyHuAaPKK/km187jPKdN2/PaGZQq4Xda43sn PdjQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc: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=dB4s1UoEI7qc8ZqQIE+Ahp4SCSFJ0byMnfzJ94WGU/A=; b=vcch6jZhbzAB/M67K4a6tFbgKttQrr7vKwvCzGmpCClxsvzmLYi+Mo2dKkZuu4Wgc7 3I0lG3MHXaeiQ/rs2gdAmetG4lsvSO3o5x1y57DwfHe8SGUkIFYYYNG4O5DP0UAEUm1g qnsWZMhiM2Zmmfm/Y9+qROmCQrpAMpxmcCIFQjad7+kQk0PUbK5UxKODLWnM4FneN8/w UVQ9pFso6Mto+YFCSGFuDF6hASCGfvGOymueISSth/AwBOC+DXDEz8RJyORG3De5U97K zOHhN7ehT8y23qB5dWRLaH13J6S5RUYXnE0GPVToHIW4vd6KZLQg4v1kNJDSvgI0AgB0 4isw== 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:cc: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=dB4s1UoEI7qc8ZqQIE+Ahp4SCSFJ0byMnfzJ94WGU/A=; b=UJIvSDQw8ppSawvJyjsnnkRs2eYd/XPUwL7GNkR5yuAEfyNTE4TeERem/KcaashhRI VKpmhCxQoJtw6LwrJzt3tqbW72MPDCAGWpnrImqUfIWlGd6u4rsp0A5KFFeocLQ1bUAB DNlWso6n+qx0Uj8GziZGVmSIV3iPLMPkhiKtMHfP2ML9eJSuj3immI9dvzmFozW88sR8 X5gGSbXg3u45KfDR/nEan9cpHpqqJKRRtVe+RU+p40pNWvKrYg3pCM594ui0LaMJjByf jIVhD+3kD+Z0xMzpQbINSgz4lByWeYch+IPfzz4VY2+e4DU043iqwWMnaqZah/68akw7 5HEA== X-Gm-Message-State: AIVw110P6xXoH2Pzglg6v1VTLfao0rgcN2Qcuor6GwcOcglVWV2Sn292 WZ+/2N5s73kCTisg X-Received: by 10.107.182.198 with SMTP id g189mr3105724iof.20.1499456799326; Fri, 07 Jul 2017 12:46:39 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.107.155.9 with SMTP id d9ls6134227ioe.40.gmail; Fri, 07 Jul 2017 12:46:38 -0700 (PDT) X-Received: by 10.36.26.134 with SMTP id 128mr19572iti.3.1499456798096; Fri, 07 Jul 2017 12:46:38 -0700 (PDT) In-Reply-To: X-Original-Sender: jmckesson@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:33149 Archived-At: ------=_Part_5006_1811496403.1499456797683 Content-Type: multipart/alternative; boundary="----=_Part_5007_1966662172.1499456797683" ------=_Part_5007_1966662172.1499456797683 Content-Type: text/plain; charset="UTF-8" On Friday, July 7, 2017 at 3:09:31 PM UTC-4, ar wrote: > > Hi > > I am an application developer in the telcom industry with 30+ years of > experience with 15+ years of heavy c++ for high end networking devices. > > I am working with code bases that started well over 15 years ago and > there is no end in sight, hence, writing maintainable code is of natural > interest to me. > > One of the ideas in this area is to have all members to have default > constructors. If encapsulating class is copyable/movable/assignable, > members should have copy/move/assignment. Hence, adding new members would > not require changes in constructors/assignments. > > Hence everybody have to write its own wrapper providing default > constructor for integral types. I do believe that this approach has a lot > of merit and it will be popular, hence, it makes sense to support it in > standard library to avoid dealing with 10000 implementations of the same > simple idea. > > The example is below. > So you want a wrapper that forces *value initialization* on trivial types. -- 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/8df877a7-658d-48bb-887b-0df4fd67a857%40isocpp.org. ------=_Part_5007_1966662172.1499456797683 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
On Friday, July 7, 2017 at 3:09:31 PM UTC-4, ar wrote:
Hi

I am an= application developer in the telcom industry with 30+ years of experience with 15+ years of heavy c++ for high end=20 networking devices.

I am working with code bases that started=20 well=C2=A0 over 15 years ago and there is no end in sight, hence, writing= =20 maintainable code is of natural interest to me.

One of the ideas in this area is to have all members to have default=20 constructors. If encapsulating class is copyable/movable/assignable,=20 members should have copy/move/assignment. Hence, adding new members would n= ot require changes in constructors/assignments.

Hence everybody have to write its own wrapper providing default constructor=20 for integral types. I do believe that this approach has a lot of merit=20 and it will be popular, hence, it makes sense to support it in standard=20 library to avoid dealing with 10000 implementations of the same simple=20 idea.

The example is below.
<= div>
So you want a wrapper that forces value initialization on tr= ivial types.

--
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.
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/8df877a7-658d-48bb-887b-0df4fd67a857= %40isocpp.org.
------=_Part_5007_1966662172.1499456797683-- ------=_Part_5006_1811496403.1499456797683-- .