220 19869 article Path: news.gmane.org!not-for-mail From: Bo Persson Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: default arguments Date: Mon, 17 Aug 2015 20:58:28 +0200 Lines: 55 Approved: news@gmane.org Message-ID: References: <736eb378-52a4-43ba-b3b5-a73719ba70af@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed X-Trace: ger.gmane.org 1439837932 5723 80.91.229.3 (17 Aug 2015 18:58:52 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 17 Aug 2015 18:58:52 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCZ6RLW3UIKBBXW5ZCXAKGQEARKHSXY@isocpp.org Mon Aug 17 20:58:42 2015 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-la0-f72.google.com ([209.85.215.72]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZRPcG-0007i4-N3 for gclcip-std-proposals@m.gmane.org; Mon, 17 Aug 2015 20:58:41 +0200 Original-Received: by labia3 with SMTP id ia3sf50287028lab.1 for ; Mon, 17 Aug 2015 11:58:40 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:to:from:subject:date:lines:message-id:references :mime-version:content-type:user-agent:in-reply-to:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=frP1zcZEKYVnmjpuBECx8nkTDzzTeHcJRHgMexUfv0k=; b=cckTHUQDskXuV8fBtNBvmdvWlRizNOT75QTP9QX0y+dQ9kcc2wN1OeJEHB5AXKBkuH tozHCIJx9K6oRKzfvxDJkLOQRnzy65voOzbhPbne8kAAKULDqdD3JhhQHKt8bOgKUHiU 6YCuNKGCnd9kfc8NQmdZxym5oDzD8LcAxampql4v9cvdFI1BPCntY8qrRzkIFaGs7h6H xqGt1WOaKQJuk9w+rEMGYTZwG2YiQoSIPcHqvO7Q+jQu8u+JcbNcShCep9b3L+0HmVkb Viaejo/gXnaFQdV93iS9WYOpWDcmQ6kI76pfVL+KLVt52dnoWQu/VSw2HvgsdJId/9kD X-Gm-Message-State: ALoCoQnPyhj38oVBCoIWD+0BJY4Wc4iooUmcjBRmyk4X0MLRgq5elWOwzeATO65tfTTwZj8TlNMQ X-Received: by 10.180.35.162 with SMTP id i2mr5223965wij.6.1439837920363; Mon, 17 Aug 2015 11:58:40 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.152.37.196 with SMTP id a4ls579403lak.27.gmail; Mon, 17 Aug 2015 11:58:38 -0700 (PDT) X-Received: by 10.152.121.37 with SMTP id lh5mr2273875lab.2.1439837918295; Mon, 17 Aug 2015 11:58:38 -0700 (PDT) Original-Received: from plane.gmane.org (plane.gmane.org. [80.91.229.3]) by mx.google.com with ESMTPS id d10si12201377lae.52.2015.08.17.11.58.38 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 17 Aug 2015 11:58:38 -0700 (PDT) Received-SPF: pass (google.com: domain of gclcip-std-proposals@m.gmane.org designates 80.91.229.3 as permitted sender) client-ip=80.91.229.3; Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ZRPc9-0007ea-79 for std-proposals@isocpp.org; Mon, 17 Aug 2015 20:58:33 +0200 Original-Received: from c-358fe655.021-326-6d6c6d10.cust.bredbandsbolaget.se ([85.230.143.53]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 17 Aug 2015 20:58:33 +0200 Original-Received: from bop by c-358fe655.021-326-6d6c6d10.cust.bredbandsbolaget.se with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 17 Aug 2015 20:58:33 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 46 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: c-358fe655.021-326-6d6c6d10.cust.bredbandsbolaget.se User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 In-Reply-To: <736eb378-52a4-43ba-b3b5-a73719ba70af@isocpp.org> X-Original-Sender: gclcip-std-proposals@m.gmane.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of gclcip-std-proposals@m.gmane.org designates 80.91.229.3 as permitted sender) smtp.mailfrom=gclcip-std-proposals@m.gmane.org 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:19869 Archived-At: On 2015-08-17 20:37, Arthur Tchaikovsky wrote: > I would really appreciate some feedback from people, or is this proposal > so uninteresting that there is no point in wasting keyboard on it? You might wonder how widely used it will be? If not all parameters are of the same type, you can already get some of the effect with a few overloads: void f(int a = 0, string b = "1", complex c = 2.0, type4 d = 3); inline void f(int a, complex c) { f(a, "1", c, 3); } inline void f(string b, complex c) { f(0, b, c, 3); } assuming that d is put last because you hardly ever want to change the default. Just saying that you can already do this without a language change. Bo Persson > > On Saturday, 15 August 2015 17:49:50 UTC+1, Arthur Tchaikovsky wrote: > > 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? > > -- --- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. 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