220 14663 article Path: news.gmane.org!not-for-mail From: corentin.schreiber@cea.fr Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: "const public:" and "const private:" to avoid to write "T Get() const" member functions Date: Thu, 20 Nov 2014 15:15:54 -0800 (PST) Lines: 95 Approved: news@gmane.org Message-ID: References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_7016_825991797.1416525354766" X-Trace: ger.gmane.org 1416525363 30733 80.91.229.3 (20 Nov 2014 23:16:03 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 20 Nov 2014 23:16:03 +0000 (UTC) Cc: mw_triad@users.sourceforge.net To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCX4RQEPQAMBBK7MXGRQKGQE4FDHQZY@isocpp.org Fri Nov 21 00:15:57 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-qc0-f200.google.com ([209.85.216.200]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1XraxA-0002z4-2W for gclcip-std-proposals@m.gmane.org; Fri, 21 Nov 2014 00:15:56 +0100 Original-Received: by mail-qc0-f200.google.com with SMTP id r5sf7806175qcx.7 for ; Thu, 20 Nov 2014 15:15:55 -0800 (PST) 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:cc:message-id:in-reply-to :references:subject:mime-version:content-type:x-original-sender :reply-to:precedence:mailing-list:list-id:list-post:list-help :list-archive:list-subscribe:list-unsubscribe; bh=tCYOaucZZpTPkmbSwdzq2EQR3qJFWKBUwEIrD2Pf43U=; b=O0w6VsilkH6p88K+FvRxPugTYeKszLYs3zM2hCG/9NERAIsEKntLvJelhAjMMAaVfl YKDCfone4wTC7okuMFjx+h8Ps7pINFHIZZiDpgs/TVfJhQpci3dtWGWEqNE6a3fnrp7+ 1g9xBWBF9mlNAyp0MQIwBHPSC5rWymxep71xQ50hZZXbv9XyC95ZW+iX7s1EcZ5E0wtj eexFn6XBDjNGFX2FeLcOrcTOSsHE9mdBJc3wEdmWeuoj0M9nFENjkuwCO3qyZqoFfmg2 bqy3O9UANHKtBpGPt/YZ5frVcGwM+svstwcr3OkiybJyihTUdGiF3LY9DpVsF6xlPQn8 2TVw== X-Gm-Message-State: ALoCoQkls8pFUJkr8tRhBXd8vg3puv5bNGg7ESB2lBa0oTVxlHv4PoNK24Vm4P0TsRW9efhFEItc X-Received: by 10.224.172.132 with SMTP id l4mr1086538qaz.9.1416525355542; Thu, 20 Nov 2014 15:15:55 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.140.16.45 with SMTP id 42ls498212qga.62.gmail; Thu, 20 Nov 2014 15:15:55 -0800 (PST) X-Received: by 10.140.93.199 with SMTP id d65mr13607qge.20.1416525355137; Thu, 20 Nov 2014 15:15:55 -0800 (PST) In-Reply-To: X-Original-Sender: corentin.schreiber@cea.fr 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:14663 Archived-At: ------=_Part_7016_825991797.1416525354766 Content-Type: multipart/alternative; boundary="----=_Part_7017_1109837971.1416525354766" ------=_Part_7017_1109837971.1416525354766 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Le jeudi 20 novembre 2014 23:56:12 UTC+1, Matthew Woehlke a =C3=A9crit : > > On 2014-11-20 17:36, Richard Smith wrote:=20 > > A variant of the 'inline variables and encapsulated expressions'=20 > proposal=20 > > would allow this:=20 > >=20 > > class X {=20 > > int private_x;=20 > > public:=20 > > using public_x =3D +private_x;=20 > > };=20 > > X x;=20 > > int a =3D x.public_x; // ok, means the same thing as 'int a =3D=20 > +x.private_x;'=20 > > but access check is done inside X.=20 > > How would you achieve this for a member of, say, a container type? (In=20 > my specific case, I have something like std::vector...)=20 > > --=20 > Matthew=20 > > using public_x =3D static_cast(private_x); ?=20 --=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_7017_1109837971.1416525354766 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Le jeudi 20 novembre 2014 23:56:12 UTC+1, Matthew Woehlke = a =C3=A9crit :
On 2014-11-= 20 17:36, Richard Smith wrote:
> A variant of the 'inline variables and encapsulated expressions' p= roposal
> would allow this:
>=20
> class X {
>   int private_x;
> public:
>   using public_x =3D +private_x;
> };
> X x;
> int a =3D x.public_x; // ok, means the same thing as 'int a =3D +x= ..private_x;'
> but access check is done inside X.

How would you achieve this for a member of, say, a container type? (In
my specific case, I have something like std::vector<Bar>...)

--=20
Matthew


using public_x =3D static_cast<const decltype(= x)&>(private_x); ?

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