220 40845 article Path: news.gmane.org!.POSTED!not-for-mail From: Hyman Rosen Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: Named parameters Date: Thu, 1 Nov 2018 18:03:08 -0400 Lines: 67 Approved: news@gmane.org Message-ID: References: <00c801d46faf$dc525450$94f6fcf0$@gmail.com> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="0000000000002da2de0579a19638" X-Trace: blaine.gmane.org 1541109676 7501 195.159.176.226 (1 Nov 2018 22:01:16 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 1 Nov 2018 22:01:16 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBDKJJPVBQMKRBKPQ5XPAKGQEBND6BRY@isocpp.org Thu Nov 01 23:01:12 2018 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wm1-f70.google.com ([209.85.128.70]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gIL1c-0001qR-89 for gclcip-std-proposals@m.gmane.org; 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[209.85.220.41]) by mx.google.com with SMTPS id j10sor4194252wrx.1.2018.11.01.15.03.20 for (Google Transport Security); Thu, 01 Nov 2018 15:03:20 -0700 (PDT) Received-SPF: pass (google.com: domain of hyman.rosen@gmail.com designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41; X-Received: by 2002:a5d:6389:: with SMTP id p9-v6mr7782864wru.215.1541109799820; Thu, 01 Nov 2018 15:03:19 -0700 (PDT) In-Reply-To: X-Original-Sender: hyman.rosen@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b="f+q/okRN"; spf=pass (google.com: domain of hyman.rosen@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=hyman.rosen@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=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:40845 Archived-At: --0000000000002da2de0579a19638 Content-Type: text/plain; charset="UTF-8" On Thu, Nov 1, 2018 at 11:51 AM Ville Voutilainen < ville.voutilainen@gmail.com> wrote: > 2) don't make it part of the ABI > 3) don't try to introduce overloading by parameter name > Just wanted to mention that overloading by parameter name (Ada style) does not mean that functions can have the same signature - they still have to be unique. That is, you can do void f(int a, int b = 0); void f(int c); and use parameter names to distinguish f(a => 0) from f(c => 0) but you can't do void f(int a); void f(int b); and have those be different functions. That's part of not changing the ABI. -- 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/CAHSYqdaXi_%2Bi6n1yk9tjPxsMZ%2BUdjfJV3zDJ8etnO9zBRPW5Ag%40mail.gmail.com. --0000000000002da2de0579a19638 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
On Thu, Nov 1,= 2018 at 11:51 AM Ville Voutilainen <ville.voutilainen@gmail.com> wrote:
2) don't make it part of the ABI
3) don't try to introduce overloading by parameter name

Just wanted to mention that overloading by parameter name (Ada st= yle)
does not mean that functions can have the same signature - they sti= ll have
to be unique.=C2=A0 That is, you can do
=C2=A0 =C2=A0 void f(int a, int b =3D 0);
=C2=A0 =C2=A0 v= oid f(int c);
and use parameter names to distinguish f(a =3D> 0) from f(c =3D> 0) but you can't do
=C2=A0 =C2=A0 void f(int a);
=C2=A0 =C2=A0 void f(i= nt b);
and have those be different functions.=C2=A0 That's pa= rt of not changing the ABI.

--
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