220 39988 <62d799ef-6e17-2fe4-66f2-a09524cbce25@gmail.com> article Path: news.gmane.org!.POSTED!not-for-mail From: Matthew Woehlke Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Named Parameters for C++ Date: Thu, 23 Aug 2018 13:18:54 -0400 Lines: 20 Approved: news@gmane.org Message-ID: <62d799ef-6e17-2fe4-66f2-a09524cbce25@gmail.com> References: <1708615.QdClGnisbJ@tjmaciei-mobl1> <60fba045-252b-486e-92e0-03c08b6d5a35@wanadoo.fr> <1925737.EHUJpxQoH7@tjmaciei-mobl1> <4df1f86f-cdee-5275-bdd1-b53f2f10bef8@wanadoo.fr> <7e07b857-8be0-f0b4-79e2-32d0f2d8e823@wanadoo.fr> <7d28cd24-b43d-4e24-876b-a04adcbbe867@isocpp.org> <19c6eb56-2188-b849-6ea1-87b37cb546de@wanadoo.fr> <3fc9fb1a-8803-4bcf-b928-c855e76f880e@isocpp.org> <01a106d3-cdaa-e348-2275-4222eed34dda@wanadoo.fr> <67ab8a8c-4a0c-4b4f-8ea1-56822e660517@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" X-Trace: blaine.gmane.org 1535044612 6220 195.159.176.226 (23 Aug 2018 17:16:52 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 23 Aug 2018 17:16:52 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 Cc: Nicol Bolas , mihailnajdenov@gmail.com, bop@gmb.dk To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC37LBFWUIFBB76Y7PNQKGQEP5WB57Y@isocpp.org Thu Aug 23 19:16:48 2018 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-qt0-f197.google.com ([209.85.216.197]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fstDy-0001U0-Lh for gclcip-std-proposals@m.gmane.org; Thu, 23 Aug 2018 19:16:47 +0200 Original-Received: by mail-qt0-f197.google.com with SMTP id y46-v6sf5343896qth.9 for ; Thu, 23 Aug 2018 10:18:57 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1535044736; cv=pass; d=google.com; s=arc-20160816; b=fksiYc+0fAOI1lOq9sttF5icNmOcg+4V6eZGOwIcS77fMom6ags8VSQzzjdd+YzWWw P0I34SolwocH1LUpxrOAQuAo56RtfRMQHkuKZziMZBw96sRaCDx3uVDzRi8BGn/yRXdR O7iwei5lA/XEAR6QAMGa1JWyFzqCn+3Ie0n+2UmYYx80Ubap3bFhIxRX4L4mR/d8Ln2Q qSLeldRCdFQUyFna+ZF2IX5IRVtMH6QKE2tP3NvaODNoWKe6tHhLhO3yNRIXI9VcacGP cMDHRA+HHTHC9L/ImIbFsWvbj1EjyzP+MksVm7J7cH6lzasI8Pi0ngypLwZDicYlvL6e 9YkA== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-unsubscribe:list-subscribe:list-archive:list-help:list-post :list-id:mailing-list:precedence:reply-to:content-language :in-reply-to:mime-version:user-agent:date:message-id:openpgp:from :references:cc:to:subject:arc-authentication-results :arc-message-signature:dkim-signature:arc-authentication-results; bh=ckStkzPRFHyurxaw0I6hlm1nr5vMgDfGG+ezLYxZhTA=; b=dMqD+dg7YV+bZZqPdpGQm+ii/5cAIhC8UjX4mXSC3UXudP2/bZKiCaDCfP/daCOchC HtH9m+uUX98KMzKPqgtSuU85yfeafDwjLOGPdKpKJHLcdDlX5FA1FzdyKmW/hApa2cv/ WnHz3DNbg1+5JCN84PBeUE9iZbCPB5uLYtpBg0NFPHRx6JtLPE28DJ/XL8di3SLdYflS 4UXvl2KfZG1aAxYa4MK8omLr2qzFkFRTVR7pWAV+sAAN07q95xyKOt4ljqRN+U3rtadY +AxFbYtHcAhpypg4JLnNJbthpjRl1erm3Fvo1VeAfzBN7rougaOx5IRy+UpnX1VZlRLW ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=pH0PCBxe; spf=pass (google.com: domain of mwoehlke.floss@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=mwoehlke.floss@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:openpgp:message-id:date:user-agent :mime-version:in-reply-to:content-language:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe; bh=ckStkzPRFHyurxaw0I6hlm1nr5vMgDfGG+ezLYxZhTA=; b=vIa7sgyuEPAb+1smz0Tv9rdeYGYf31vbNMTKQLgtliVhUTkeARTwwXoMS3xYXG5G8M DxaaU0F38BRNG999lXyHAbexgVjuY5dBVGjswApL1RGKGZB6e/mlCFtfGWii9Wz/kxVr uEo8Ifdc2KZpywEovaKxpSPSiDBnEi220Px9wLUqLvUrapuTdkc6XlhfFMd/CIrFaU7h 4fSrsV+kQV+eA59YjbvGGFMuN3puMcep+IZqa0GzMTzXRGPuLoBe6aBcuqB4hR5UL3v+ FNYtWlYCYE/Qpa9OLBhhquU7MQZO+0Bf9ed2aLJR7kzHo+G9i7ZQbWs6hT8GZZqx+vZy 4Vyw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:openpgp:message-id :date:user-agent:mime-version:in-reply-to:content-language :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=ckStkzPRFHyurxaw0I6hlm1nr5vMgDfGG+ezLYxZhTA=; b=tK4B20QmZe8G5PShU9JrlyjU3c7H9pkfgUWhlopddRANVebFWNmlJanzpuZ8n+aB3r imIWcS1E+1albIDv4mI83lifAfM9ldMEaMRAOFtF97zu5v249BZgpg09dD9Q33ck8Ytw 3JNJPw6Ods4JN1c3N132KIWvMyoFjHlH3B32WIDcC0NNvF8HPIQkUbW31Vf8GJj2buBH 592RWcXE2FrrchiptD+rqHoDhDHH0gPQD9ziKWF20aSDj59fToIlRC6ELx7luqVOqbMj 03rRTMAn9RGx7i1BgJevWGqxLCxYW01vUJm9KMAsvbPjiv6yNiB/5GOWTu5D6Dp7HoK4 X-Gm-Message-State: APzg51BHNMla1ayUF218hMpIG8og5qAOJr6QPMoxMwNVgCrSpEqcgzqN mPusR31e5v68TizpeZVGEVaRrA== X-Google-Smtp-Source: ANB0VdZRWu/HNATgyQhrhoRNyCVatNPZzJW22LHGqK8UWRk5NQQ3eSFb5tj1igpZlzHoIrOcFxNtsg== X-Received: by 2002:a37:a50b:: with SMTP id o11-v6mr7182901qke.30.1535044736720; Thu, 23 Aug 2018 10:18:56 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 2002:a37:14a5:: with SMTP id 37-v6ls1507064qku.2.gmail; Thu, 23 Aug 2018 10:18:55 -0700 (PDT) X-Received: by 2002:a37:cbdc:: with SMTP id u89-v6mr8452838qkl.292.1535044735430; Thu, 23 Aug 2018 10:18:55 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1535044735; cv=none; d=google.com; s=arc-20160816; b=dhxSALTYlnEk6Qp6MWdrQjSGTWAuGBLwDDL3r9bs4rKhfP5UjMxMbgz1JXKYgfti0i r1v/Gj+DyUpum7rzlTNkbqAqAfXksFpm3J+5Kxh4w9uPEPGhLB4yfMTUtLIpPUDMpDH3 X2oQwPsY5as0tdq3g6//WEl35dMr4wyrSGVB5Pu/RfiFfDErrtLiButzJ1MGfB3S9H6j FAV+hd5nVTYI7+eXMIH9hUnwjAQ0Rs2bZmchralKvyparuq3u328jPyzoVX13IHgLvjC LuclQaoPNXqWQkjLSU47nW/pR2CQvGWYqAcIgHGshFDjuWLObXdgkb3MEINfCfYN5Hnq UvRA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:content-language:in-reply-to:mime-version :user-agent:date:message-id:openpgp:from:references:cc:to:subject :dkim-signature:arc-authentication-results; bh=3N+52y+Y/Hcc4ZJHF3S107mwz3kzCZqwqCvQZob5tJQ=; b=VDAzCp19FhF91M34Crh0OPfYAWdXO00jQUknac08N3KjayojcAmNW3L91Z9ci9A0Eo jlMIrT9EJQPMR3FSHxeYfNRC5y8qs5Cgu8sKsqStE1UiXPxkTKCNi7yYlFmvvmrVwZwx jl3dkrVyxoMUNlbkP5SMugyL3u8VM5E2iWfOOJCEsLewt0ufLBh3A+68fBx1KtgnOhMc oCTlXoic2CQkjP3x/gXNwv+QirOoSCb5eNidfm6g57mMkYE9tr8AzHG+VR89kXAnFMYY OXAjYBjzSk00zrgFK6ASHAd7r0X/vNsak5HmFSSYPY86G/1UfYD7H9KK7quR4g4wBqYJ glbQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=pH0PCBxe; spf=pass (google.com: domain of mwoehlke.floss@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=mwoehlke.floss@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Original-Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id g3-v6sor2506459qkf.157.2018.08.23.10.18.55 for (Google Transport Security); Thu, 23 Aug 2018 10:18:55 -0700 (PDT) Received-SPF: pass (google.com: domain of mwoehlke.floss@gmail.com designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; X-Received: by 2002:ae9:df81:: with SMTP id t123-v6mr56627519qkf.55.1535044735284; Thu, 23 Aug 2018 10:18:55 -0700 (PDT) Original-Received: from gryphon.kitware.com (tripoint.kitware.com. [66.194.253.20]) by smtp.googlemail.com with ESMTPSA id d100-v6sm3620330qkh.34.2018.08.23.10.18.54 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 23 Aug 2018 10:18:54 -0700 (PDT) Openpgp: preference=signencrypt In-Reply-To: <67ab8a8c-4a0c-4b4f-8ea1-56822e660517@isocpp.org> Content-Language: en-US X-Original-Sender: mwoehlke.floss@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=pH0PCBxe; spf=pass (google.com: domain of mwoehlke.floss@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=mwoehlke.floss@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:39988 Archived-At: On 2018-08-19 17:53, Nicol Bolas wrote: > Lastly, it should be noted that tagged dispatch doesn't help with what I > will refer to as "mega-functions": functions that take stupidly large > numbers of relatively independent parameters, but for some reason don't > want to take them as a convenient aggregate. This is a use case that some > people want to support, to avoid conceptual two-stage construction. A good exercise in "why do we want named parameters" (at least for this use case) would be to try to implement the API of Python's argparse in C++17. -- Matthew -- 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/62d799ef-6e17-2fe4-66f2-a09524cbce25%40gmail.com. .