220 33778 article Path: news.gmane.org!.POSTED!not-for-mail From: Ville Voutilainen Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: properties? Date: Thu, 10 Aug 2017 09:35:15 +0300 Lines: 43 Approved: news@gmane.org Message-ID: References: <6ed2bd55-5538-418f-8f1a-263a9958babd@isocpp.org> <9979b017-fc21-445f-a1d1-0f55f8e7bf3d@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 1502346917 21302 195.159.176.226 (10 Aug 2017 06:35:17 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 10 Aug 2017 06:35:17 +0000 (UTC) Cc: bop@gmb.dk To: "ISO C++ Standard - Future Proposals" Original-X-From: std-proposals+bncBC5JHI7A7ALRBJH5V7GAKGQETBAWS5I@isocpp.org Thu Aug 10 08:35:13 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-yw0-f198.google.com ([209.85.161.198]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dfh3n-0005BZ-7d for gclcip-std-proposals@m.gmane.org; Thu, 10 Aug 2017 08:35:11 +0200 Original-Received: by mail-yw0-f198.google.com with SMTP id k20sf135935181ywe.7 for ; Wed, 09 Aug 2017 23:35:17 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1502346917; cv=pass; d=google.com; s=arc-20160816; b=X7Qt5iRyJGZQ++JhUZVNlt00fOINxb4PIRdVEBMFLy6b1TmbxHPKQ/nYcAJIdmPaFW 5I54RxTZYS7vJ4ZS/7V1QOQ6hobjSgrapLxeCJvUPYbZZDTXm7raRECauFC3zDSLtDMK /cTwT+hH3CwR0WidvXJrhgu3MTAvs68mAxnBjZ+LMwlSIHNFMUTErYNY9WTDIBNloGOK HuKQaArk9D1ZvgBkUhmf/DvbGn1pFkimqhMOi/eARYuf4kdEuf7vySIb3ZykMyO4qzj4 A/ziQ3hNCmD0gmZAkFFjOGYs7BI3rQERSYoMb3tzqIILV8mIDWKSllzLH2GpZxsrkX/s b+OQ== 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:cc:to:subject:message-id :date:from:references:in-reply-to:mime-version :arc-authentication-results:arc-message-signature:dkim-signature :arc-authentication-results; bh=1IrRiXjxLRPTi8MmMg9XeYYP0oBRIPFsh2KB/NfhZlo=; b=P9+i0znOQ8ZigukZY7VogGaMYKHdNdHeLOu3uSHW92WdlCMzChdOpEU5AwWFlxkL9f HAvzne4lqIJtU5vLf7UeufELlrX/qOZ2HpBB8to41LANsp1wfAdwktT38rVXTJP/NfKt Le0zRPPGx0SCaXR2B4dVpJWQQh/3gEu2523SfkDbVDfRbVelPW00r3SBJ1MeucVPueCh KN0BnWnHWN6nZbKzS6TJeCxxyXXgc+BtZL2KxvPgtv0h8yUHv2K8DyIHDBEUvNs1WmJw 64+Xk0rn+L0gzT/XNQeaUlAi0P/LLZ5pcq8CAESAZSVGjsxO4wSzcKBdPQY5xRVo6MIt 8xPw== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=HbjkDhhP; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400c:c08::243 as permitted sender) smtp.mailfrom=ville.voutilainen@gmail.com; dmarc=pass (p=NONE sp=NONE 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=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc: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=1IrRiXjxLRPTi8MmMg9XeYYP0oBRIPFsh2KB/NfhZlo=; b=XfqG8rpsYbcBUUJwMUMgNv8hU1BOfvAAQe2i71aXfNukL6/bnMNjfNG89saLgzkNqR vlq0mZCZUTl15lGYy8NWhhW6RnvmOw3dcNWH78HJCKqxYtf9mceT+fhccoREYflOnL/9 Jj4GmnRprLtWr7l7lLSl0aOcaY4x75rzXdleD/i8Fxa/DmF7NuQz0hKfP8CR0sMLl2pN p3nfqWsR4xthYcrj0QkQFj2Srf3c4rJZYmCDCZLDGgr4/4XcxeMRx1Qg6Un3fBPWOWBj OgRRSAn67EAVwHjABdISOgVvwEudhEryuyXQ6tDfuJqvi+F1+Xl28vWZaqrk2U+Y8Bx/ SUvQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc: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=1IrRiXjxLRPTi8MmMg9XeYYP0oBRIPFsh2KB/NfhZlo=; b=sqsvWepAWprxu+2qdtUaUZ5/CMjlkOchCxVr99G12twmETcrN5xdatcZYJ7V6E9bug 6u/xOrSeFt3Vd83l9VMbKq9DRP7b2nJsOfehtoFJEMM/i95Scwu2QsIeJTSK/LGFnhtG 6zxJoCUTalcSW25Tn6iwQrhVwEU79W59XCSQoarbbZKgBm5H2vQgLy6sC1Y6WcrXPyZD YVRSabyz33vglAFfZI+xdidr7sgDqQNWXabJrvDBZtGL8rk2faSfU8d2PGPlOTLl0ZyF nkvofMedq8fdgc/LtqwSEfOwNmh8Fo8oy+Ak7wU6hdgDP283YuBo0zHDQkZt8W3vI1ZK 1MKw== X-Gm-Message-State: AHYfb5hSJnLCjcAYg7P2lCJMMJl8oqnsti+Rnn9Pf48cFxDV/efIKgaM PARLyPA0sMj8BiRh X-Received: by 10.129.120.72 with SMTP id t69mr6940024ywc.213.1502346917448; Wed, 09 Aug 2017 23:35:17 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.107.169.79 with SMTP id s76ls5724105ioe.3.gmail; Wed, 09 Aug 2017 23:35:16 -0700 (PDT) X-Received: by 10.176.81.34 with SMTP id e31mr7745707uaa.73.1502346916082; Wed, 09 Aug 2017 23:35:16 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1502346916; cv=none; d=google.com; s=arc-20160816; b=X4rj3SRKwSozHC5dvgsm8fdyce7ABdt2Gct0wqnwG0HsHNtLbNuFPI6TCwGK1QtgD3 ASpbK+zGnKY0HKSkU2PN550ZdOe2i1rb2dUQ8I1XaM7z+1LET0ZzhoK2pmk3aVMovYVQ 5hT8xYARqjFVKCFOU7zlzrzIrfmX7Fhu12AOGVMOjap3m85RSStsTusT8opL1Xpj7TdQ jlv4v0ArE9OpJ2oRAAwfrb1XYIlNW23DLow2TLNL25c93KEDLy8FyWtfGaV94QZ8/y7s 5ZoKDMy9Cl1v+5cijsczkWXtWI2Q2rHL4IHPl5x94yOwOBQEfPBGHMvugDiAbwLbwR8H mxSQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=cc:to:subject:message-id:date:from:references:in-reply-to :mime-version:dkim-signature:arc-authentication-results; bh=WLEMZ45aNnmyYXLyKDUxuap6jpFLt7n4SA3Xq2B/yX4=; b=GgJNhqCuaIzoqoqigYBOl61qZc3E8MtCLoLAOt/hhUQMElOmD98BnanRqMgk4lJ22N +oqTLNDqpdCNN+JcgZ6MvEV0YFjVKO8icjKHlpbeKTaL3TkrE/GI3cszs8f3hQK224bT e+JCpVUjkVoVqfl1tn4GsNJefmUAhIpJKd+GCWKvteBzr/4mnzPX7+QViAK1VIDq4MPc ibEYaoxrbHH84/pYtPoHj7RmReCyT0VQjpL2/YzvDk0KZOw+G9/so9cnlPVJHNnUxk7x ElB1ViaBS289KVgpi3Pf4AqW+JLE6vUyKYjWFS/NrTHLq1/UP9MGQGQBF2kdkxcd+kUK 8E2Q== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=HbjkDhhP; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400c:c08::243 as permitted sender) smtp.mailfrom=ville.voutilainen@gmail.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=gmail.com Original-Received: from mail-ua0-x243.google.com (mail-ua0-x243.google.com. [2607:f8b0:400c:c08::243]) by mx.google.com with ESMTPS id l27si3308434uag.218.2017.08.09.23.35.16 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 09 Aug 2017 23:35:16 -0700 (PDT) Received-SPF: pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400c:c08::243 as permitted sender) client-ip=2607:f8b0:400c:c08::243; Original-Received: by mail-ua0-x243.google.com with SMTP id 80so5001363uas.4 for ; Wed, 09 Aug 2017 23:35:16 -0700 (PDT) X-Received: by 10.159.60.34 with SMTP id u34mr7449815uah.69.1502346915635; Wed, 09 Aug 2017 23:35:15 -0700 (PDT) Original-Received: by 10.103.103.65 with HTTP; Wed, 9 Aug 2017 23:35:15 -0700 (PDT) In-Reply-To: <9979b017-fc21-445f-a1d1-0f55f8e7bf3d@isocpp.org> X-Original-Sender: ville.voutilainen@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=HbjkDhhP; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400c:c08::243 as permitted sender) smtp.mailfrom=ville.voutilainen@gmail.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=gmail.com 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:33778 Archived-At: On 10 August 2017 at 09:19, Nicol Bolas wrote: > On Wednesday, August 9, 2017 at 10:12:36 PM UTC-4, Bo Persson wrote: >> >> On 2017-08-09 19:32, Evan Teran wrote: >> > I never brought it up before because I assumed that it MUST have been >> > discussed in the past... >> >> Oh, yeah... >> >> > >> > The idea being of course that this makes code such as the following >> > valid: >> > >> > | >> > T value; >> > value.data =10; >> > std::cout <> > | >> > >> >> This could already work if you just add () to each use of data. :-) > > > Would it? Would this: > > some_function(value.data()); > > Would that allow `some_function` to set `data`'s value? To do that, you > would need to make `data()` return a proxy object, which can be converted > into the appropriate type, but can also be assigned to the appropriate type > and otherwise treated exactly like a reference to the other type. > > That's hardly "just" adding something. Gee, data() could just return a reference. -- 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/CAFk2RUadaK3Dz_EgKMCp%3DUP84-VgZHtjnPaRn4yZTnADgUqgnQ%40mail.gmail.com. .