220 18899 <5c654bc3-5294-4f8a-bf1a-bf4a9f6c8603@isocpp.org> article Path: news.gmane.org!not-for-mail From: Igor Baidiuk Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Unified coercion protocol: static_cast explicit overload Date: Wed, 1 Jul 2015 04:17:51 -0700 (PDT) Lines: 105 Approved: news@gmane.org Message-ID: <5c654bc3-5294-4f8a-bf1a-bf4a9f6c8603@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_1852_1279424045.1435749471762" X-Trace: ger.gmane.org 1435749475 29601 80.91.229.3 (1 Jul 2015 11:17:55 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 1 Jul 2015 11:17:55 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBDK4F76SSIIBBYEYZ6WAKGQE7PYJTHA@isocpp.org Wed Jul 01 13:17:55 2015 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ob0-f197.google.com ([209.85.214.197]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZAG1a-0000Na-IV for gclcip-std-proposals@m.gmane.org; Wed, 01 Jul 2015 13:17:54 +0200 Original-Received: by obbtu2 with SMTP id tu2sf61834533obb.1 for ; Wed, 01 Jul 2015 04:17:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:message-id:subject:mime-version:content-type :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=AZEGwtpeEZEQsYb0lWUOjDPhyUmdurMIcqg4yHmr9pU=; b=HbOTIe/ngG45tyhkFLn7iGx7vfrLxF8c+dtt6hM/jb5wn74IS2MsaWZnlqlMF16/gU jfpo/tfCOmZaS7A6r9foGxYS65mfnyrbDKnguqgMB9IbNGrrivqm1rz77wHEsY70g2zu zuUG+yfEdimONKtWoVxjFDCajnes4ze70ciYY5X8NxSutgx5KW5Fk8tPl4fbue7PSNn8 qEJiRwZFtnHdUEcT5C4Xpr8aRiix8OvN5ZWYU7IUicZ41Zo+RDrf/hai/OTp60e/4p3l iG+Ei8HHO6e0b1XxCJpNcduAXy4hbM0yK3OBlHr81A9WpZDuCDP2HuO8c3CV7pbjFbOL k9SA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:message-id:subject:mime-version :content-type: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=AZEGwtpeEZEQsYb0lWUOjDPhyUmdurMIcqg4yHmr9pU=; b=OKnmX3O2XfBWsQ1ev+4zufMJ2PJ7JIy1H2/l+k3oT1G4PTL0Li+76+1vcjEvELXoPV 1YNUmD0ZFOYRCVUUhihOBiMoxpjERPoaihpLBxkjlMWfBMOkPN6/OJXofY+dLKili/Gs VFFP63w7iTaOn3gIoQbV21GBNtOyCm0vVcCG92IyIQykjRA/ZfqjZ4q1Vg0lsLkgTrni B8uZynZ+ome7Os6t9v5WpAHcyzbQW3kRmOKzqHq1ZPyqLfVjgMZ68BpROyH/f7w1FWHF ARcF/g5kpoSsjjQJgnpzddrL+uzNNt8j+2Ju1VbUUC7iy6Q17a5k1cSLC+1PsOMxIq2J IpiA== X-Gm-Message-State: ALoCoQl4KRYMqy3vpDD6cV5RzwHgmceZRoWDcI1h8WvNo3yjnVx4X9nU4j4usNV8kYOVhwEmeOjT X-Received: by 10.182.213.4 with SMTP id no4mr33803375obc.21.1435749473537; Wed, 01 Jul 2015 04:17:53 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.140.31.227 with SMTP id f90ls731059qgf.9.gmail; Wed, 01 Jul 2015 04:17:52 -0700 (PDT) X-Received: by 10.140.105.10 with SMTP id b10mr310652qgf.26.1435749472328; Wed, 01 Jul 2015 04:17:52 -0700 (PDT) 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-Spam-Checked-In-Group: std-proposals@isocpp.org 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:18899 Archived-At: ------=_Part_1852_1279424045.1435749471762 Content-Type: multipart/alternative; boundary="----=_Part_1853_526166904.1435749471762" ------=_Part_1853_526166904.1435749471762 Content-Type: text/plain; charset=UTF-8 What if we could define operator static_cast(From const& from) { return { from.a, from.b}; } // later in code From from; auto to = static_cast(from); as means of non-member, explicit conversion syntax? So we don't need to write tons of functions like toFoo, toBar, toBaz etc. Or, allow declaring non-member conversion operators, which are explicit by default? -- --- 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_1853_526166904.1435749471762 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
What if we could define
operator static_cast<To>(From = const& from)
{
    return { from.a, from.b};}=
// later in code=
From from;
auto to =3D = static_cas= t<To>(from);
as means of = non-member, explicit conversion syntax?
So we don't need to write tons o= f functions like toFoo, toBar, toBaz etc.
Or, allow declaring non-member= conversion operators, which are explicit by default?

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