220 9891 article Path: news.gmane.org!not-for-mail From: Matheus Izvekov Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: Explicitly-defaulted enumeration operators Date: Mon, 17 Mar 2014 22:01:02 -0700 (PDT) Lines: 129 Approved: news@gmane.org Message-ID: References: <3B09C97E-7ADE-49ED-8C31-B5B41CD3DDE7@gmail.com> <781009e3-cd3c-4cb8-b034-b51a7c97c750@isocpp.org> <10450602-fee9-48c4-9fa2-d000e434f5fb@isocpp.org> <6F532E62-C10A-404A-8F0D-662B7EA3D202@gmail.com> <24e85eaf-e67b-4a0b-acee-47d996d6f6ee@isocpp.org> <7F327393-B9EF-46EB-A40E-86F80EFEF5BD@gmail.com> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_796_10176964.1395118862444" X-Trace: ger.gmane.org 1395118859 23531 80.91.229.3 (18 Mar 2014 05:00:59 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 18 Mar 2014 05:00:59 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCOKZ27XTMNRBD5GT6MQKGQE5KDTDUA@isocpp.org Tue Mar 18 06:01:06 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-qa0-f72.google.com ([209.85.216.72]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WPm9A-0001tN-Dz for gclcip-std-proposals@m.gmane.org; Tue, 18 Mar 2014 06:01:04 +0100 Original-Received: by mail-qa0-f72.google.com with SMTP id f11sf14024983qae.7 for ; Mon, 17 Mar 2014 22:01:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.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=vlfoImZ0E4oZZk0kWcUhwebc1nQmKhIA/WbvoymOxms=; b=OFOl3yLhNzaWwQQ1WSVTM5se7Q/UrWzZjCJPKFZAz5VE5q+PpuT3qp49+zFSYEPqky OhV2g+gVT++sNrTKq/R04kvfJ1PeELTks/jV/SwEaMQ1fF83dH9UweagU8ayC6Vp2k9w r14BVH6UuP671Pf8wUEz6kZEcA4saMyjGQAsbij+oS+1YogXJg8U033TtFfQBSka+EUB TtQX6mvjDpTVzoa0glv30PV6rx+zQrOfd6KZYM77gr7nnGn1uM6D/S96Du4ggpwLAPEw 1qeQb8AMFfYTmcbOXH2mqzdC5RCGHam9wNK/9QlBnSkvMlEVeOZQyVi0gM53rMQQt0pC U3aw== 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: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=vlfoImZ0E4oZZk0kWcUhwebc1nQmKhIA/WbvoymOxms=; b=GRqQg2Hy1XEbnbuoclT8bG5yF9r8CK3EiEJd8j32PK4/Hf98aTxpDK1TYq88wTynhM /KUgkqXh7IramyPuOGrL+cDzcNsxqQwLvccvOpAp79iyHrrK2l+MpfbZdfAbqjEYCaZw iHLiqpxcwokpasm52sA+tuP3kP4j02YaB5iPShEIuHmRAcjhkdHWXPa+QCTtGv01uaIP CzexiHC30PvHbUFwbUcBh3c/Qv+atwgcTyxq/VFrKLndDNxTJcJHqNuu2fMzGA0jF82V nX6oXwkbmpVVqI16ShJ6Vu35E83NEqVkbADGnz3XDmCwL82H24o4qDLz/cos1w48NBHF U0DA== X-Gm-Message-State: ALoCoQltvO1Mue7sY7Kc/klnPzZkiKBWx0khxIFwjVdgSkqJVuHx+2QNySrVDw8J0jwM4F5+MjGP X-Received: by 10.236.94.238 with SMTP id n74mr1492036yhf.27.1395118863524; Mon, 17 Mar 2014 22:01:03 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.140.105.100 with SMTP id b91ls1967067qgf.26.gmail; Mon, 17 Mar 2014 22:01:02 -0700 (PDT) X-Received: by 10.140.93.109 with SMTP id c100mr5108qge.21.1395118862882; Mon, 17 Mar 2014 22:01:02 -0700 (PDT) In-Reply-To: <7F327393-B9EF-46EB-A40E-86F80EFEF5BD@gmail.com> X-Original-Sender: mizvekov@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:9891 Archived-At: ------=_Part_796_10176964.1395118862444 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Tuesday, March 18, 2014 1:51:08 AM UTC-3, David Krauss wrote: > > > On 2014=E2=80=9303=E2=80=9318, at 12:42 PM, Matheus Izvekov >=20 > wrote:=20 > > > Well, he doesn't say explicitly, but it seems Walter's approach would b= e=20 > applicable to enum types just as well, or if not, could be easily extende= d=20 > to cover that.=20 > > Yeah, but it would be redundant. And you would lose the=20 > implicit/defaultable definitions because there would be no underlying=20 > operators.=20 > > Hmm, but suppose you could write something like this: enum class flags : uint32_t { foo =3D 1, bar =3D 2, baz =3D 4; flags operator|(flags,flags) =3D default; }; Seems all the machinery for this is in Walter's paper, but it would need a= =20 new grammar rule for allowing ';' inside enum definitions. --=20 ---=20 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 e= mail 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-proposa= ls/. ------=_Part_796_10176964.1395118862444 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On Tuesday, March 18, 2014 1:51:08 AM UTC-3, David Krauss = wrote:

On 2014=E2=80=9303=E2=80=9318, at 12:42 PM, Matheus Izvekov <mizv...@gmail.com> wrote:

> Well, he doesn't say explicitly, but it seems Walter's approach wo= uld be applicable to enum types just as well, or if not, could be easily ex= tended to cover that.

Yeah, but it would be redundant. And you would lose the implicit/defaul= table definitions because there would be no underlying operators.


Hmm, but suppose you could write something like t= his:

enum class flags : uint32_t {
   foo =3D 1<= /span>, bar =3D 2, baz =3D 4;
   flags operator|(flags,flags) =3D d= efault;
};

 S= eems all the machinery for this is in Walter's paper, but it would need a n= ew grammar rule for allowing ';' inside enum definitions.

--

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