220 19883 <1e7b94e7-364a-419d-9b12-6706ddef0fef@isocpp.org> article Path: news.gmane.org!not-for-mail From: Arthur Tchaikovsky Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: default arguments Date: Tue, 18 Aug 2015 03:22:15 -0700 (PDT) Lines: 208 Approved: news@gmane.org Message-ID: <1e7b94e7-364a-419d-9b12-6706ddef0fef@isocpp.org> References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_201_1299394540.1439893335422" X-Trace: ger.gmane.org 1439893339 16136 80.91.229.3 (18 Aug 2015 10:22:19 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 18 Aug 2015 10:22:19 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDL6FI4NYYERBWEOZSXAKGQE2X25W6I@isocpp.org Tue Aug 18 12:22:19 2015 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-pd0-f197.google.com ([209.85.192.197]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZRe26-0002md-VI for gclcip-std-proposals@m.gmane.org; Tue, 18 Aug 2015 12:22:19 +0200 Original-Received: by pdfx2 with SMTP id x2sf356295292pdf.2 for ; Tue, 18 Aug 2015 03:22:17 -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 :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=MTRBVsH4hIRlNKc80TByro8o5uSdkDpmgdm2mdyXo8o=; b=M/rs43Ef4BGkWELEmtcZzcIdjF/MkI+XwXdHLJxIgyf+3DadcqxuI7fmJKPrJW1Gtn fBiSTYG35tJ1a7S0veodatbFK/ABR/tDSoZhJsjx03EjHqTOFrj/NvrSQT2HoARU1IvT Gus0UMbrsgRNljund1ohI+WgvmRfc9E7jmyLSGWwPC7zTioq6JuafEj8oPTmCaW/xV32 VwjxSyl0v/CqiReq8fYv+C+kgrvXXl/NNSmi6PJlwoqOPpiUvSXhgVa6zHTEahj/3EHc VKKazgspRTXp6GX9qs9gd2+lSHacqs5g0HEzvUWzHwgL7OvxN8Od8teYEmB+Z/UZihzL SbPA== 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: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=MTRBVsH4hIRlNKc80TByro8o5uSdkDpmgdm2mdyXo8o=; b=GF43Dv9a+jwJHvJclFl8+knejgcPKz/YUg6XyzBCfjPAYFO75/9BedsqI0JrZykvK4 Gz7gxYGW+oukbkdAZtLE97/DNLPwu0zqAtl++JDJG1b/S5x6Pnz8Hlkma6kOq8osP5E2 XOiw4NUw63EiyMpcvda9wVOWNh0maGyqyxcxTzRMxEUj+PTBtS8vbQg9dOjAutpzeNaE dyv5Y0q19LdCKmdc4svT4u/b0Wt+5V9/rQmbLju2FCptr7dBxXqu/F8lz8ncVK/02Mim ntT5CzlbvDptVl0AfjskGCGLpzwj3IH03H32espWBKDgU7CyBoY+BIFadsX15kFm/N9b OUow== X-Gm-Message-State: ALoCoQkNjp7SSDFjq20zUem6oz9PCR6mxnD/PS7dNsZgECr5pa4CPasWjeY2w3r3CdAO8myS3D9n X-Received: by 10.66.164.225 with SMTP id yt1mr5298969pab.32.1439893337732; Tue, 18 Aug 2015 03:22:17 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.140.36.170 with SMTP id p39ls2806873qgp.26.gmail; Tue, 18 Aug 2015 03:22:16 -0700 (PDT) X-Received: by 10.140.31.70 with SMTP id e64mr74721qge.12.1439893336265; Tue, 18 Aug 2015 03:22:16 -0700 (PDT) In-Reply-To: X-Original-Sender: atch.cpp@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:19883 Archived-At: ------=_Part_201_1299394540.1439893335422 Content-Type: multipart/alternative; boundary="----=_Part_202_1423641478.1439893335435" ------=_Part_202_1423641478.1439893335435 Content-Type: text/plain; charset=UTF-8 I gotta be honest with you Johann, I simply don't buy it. And index notion looks anything but elegant solution. That is my opinion of course. On Tuesday, 18 August 2015 10:46:19 UTC+1, Johannes Schaub wrote: > > > Am 18.08.2015 11:42 schrieb "Arthur Tchaikovsky" >: > > > > That genuinely seems pointless/silly to me, unless you can provide some > convincing use cases. > > > > These are designated initializers and why stop at making initialization > uniform just before designated initializers? > > It seems natural to me to allow them in function argument lists including > for constructors. And the index notion looks like an elegant solution to > skip arguments. > > > On Tuesday, 18 August 2015 10:34:39 UTC+1, Johannes Schaub wrote: > >> > >> > >> Am 15.08.2015 18:49 schrieb "Arthur Tchaikovsky" : > >> > > >> > Hi, > >> > Does anyone see helpfulness of such solution: > >> > Having fnc: > >> > > >> > void f(int a = 0, int b = 1, int c = 2, int d = 3); > >> > > >> > I think that it would be nice to be able to say whilst calling it and > requiring only some of those args to be non-default: > >> > > >> > f(default,2,default,4); > >> > > >> > Thoughts? > >> > > >> > >> I would also wanna solve this with named arguments > >> > >> f(.b = 2, .d = 4) > >> > >> And index based > >> > >> f([1] = 2, [3] = 4) > >> > >> > > >> > > >> > > >> > > >> > -- > >> > > >> > --- > >> > 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-proposal...@isocpp.org. > >> > To post to this group, send email to std-pr...@isocpp.org. > >> > >> > Visit this group at > http://groups.google.com/a/isocpp.org/group/std-proposals/. > > > > -- > > > > --- > > 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-proposal...@isocpp.org . > > To post to this group, send email to std-pr...@isocpp.org . > > Visit this group at > http://groups.google.com/a/isocpp.org/group/std-proposals/. > -- --- 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_202_1423641478.1439893335435 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
I gotta be honest with you Johann, I simply don't buy = it.
And index notion looks anything but elegant solution. That is my opi= nion of course.

On Tuesday, 18 August 2015 10:46:19 UTC+1, Johannes = Schaub wrote:

<= br> Am 18.08.2015 11:42 schrieb "Arthur Tchaikovsky" <atch...@gmail.com= >:
>
> That genuinely seems pointless/silly to me, unless you can provide som= e convincing use cases.
>

These are designated initializers and why stop at making ini= tialization uniform just before designated initializers?

It seems natural to me to allow them in function argument li= sts including for constructors. And the index notion looks like an elegant = solution to skip arguments.

> On Tuesday, 18 August 2015 10:34:39 UTC+1, Johannes Sch= aub wrote:
>>
>>
>> Am 15.08.2015 18:49 schrieb "Arthur Tchaikovsky" <= atch...@gmail.com>:
>> >
>> > Hi,
>> > Does anyone see helpfulness of such solution:
>> > Having fnc:
>> >
>> > void f(int a =3D 0, int b =3D 1, int c =3D 2, int d =3D 3); >> >
>> > I think that it would be nice to be able to say whilst callin= g it and requiring only some of those args to be non-default:
>> >
>> > f(default,2,default,4);
>> >
>> > Thoughts?
>> >
>>
>> I would also wanna solve this with named arguments
>>
>> =C2=A0 f(.b =3D 2, .d =3D 4)
>>
>> And index based
>>
>> =C2=A0 f([1] =3D 2, [3] =3D 4)
>>
>> >
>> >
>> >
>> >
>> > --
>> >
>> > ---
>> > You received this message because you are subscribed to the G= oogle Groups "ISO C++ Standard - Future Proposals" group.
>> > To unsubscribe from this group and stop receiving emails from= it, send an email to std-proposal...@isocpp.org.
>> > To post to this group, send email to std-pr...@isocpp.org<= /a>.
>>
>> > Visit this group at http://groups.googl= e.com/a/isocpp.org/group/std-proposals/.
>
> --
>
> ---
> You received this message because you are subscribed to the Google Gro= ups "ISO C++ Standard - Future Proposals" group.
> To unsubscribe from this group and stop receiving emails from it, send= an email to std-proposal...@isocpp.org.
> To post to this group, send email to std-pr...@isocpp.org.
> Visit this group at http://groups.google.com/a/<= wbr>isocpp.org/group/std-proposals/.

--

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To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposa= ls+unsubscribe@isocpp.org.
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