220 33801 <CAFk2RUYys9RHq1y+VGor55HHz5XqPyixrexPKp5mOAnuSMW+ow@mail.gmail.com> article
Path: news.gmane.org!.POSTED!not-for-mail
From: Ville Voutilainen <ville.voutilainen@gmail.com>
Newsgroups: gmane.comp.lang.c++.isocpp.proposals
Subject: Re: Re: properties?
Date: Thu, 10 Aug 2017 19:59:58 +0300
Lines: 32
Approved: news@gmane.org
Message-ID: <CAFk2RUYys9RHq1y+VGor55HHz5XqPyixrexPKp5mOAnuSMW+ow@mail.gmail.com>
References: <17b1a3ed-1590-21ce-328d-053b86d6fc0b@gmail.com>
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 1502384404 31231 195.159.176.226 (10 Aug 2017 17:00:04 GMT)
X-Complaints-To: usenet@blaine.gmane.org
NNTP-Posting-Date: Thu, 10 Aug 2017 17:00:04 +0000 (UTC)
To: "ISO C++ Standard - Future Proposals" <std-proposals@isocpp.org>
Original-X-From: std-proposals+bncBC5JHI7A7ALRBD5CWLGAKGQEENOZ7RI@isocpp.org Thu Aug 10 19:00:00 2017
Return-path: <std-proposals+bncBC5JHI7A7ALRBD5CWLGAKGQEENOZ7RI@isocpp.org>
Envelope-to: gclcip-std-proposals@m.gmane.org
Original-Received: from mail-qk0-f200.google.com ([209.85.220.200])
	by blaine.gmane.org with esmtp (Exim 4.84_2)
	(envelope-from <std-proposals+bncBC5JHI7A7ALRBD5CWLGAKGQEENOZ7RI@isocpp.org>)
	id 1dfqoM-0007eP-LD
	for gclcip-std-proposals@m.gmane.org; Thu, 10 Aug 2017 18:59:54 +0200
Original-Received: by mail-qk0-f200.google.com with SMTP id o5sf6075073qki.2
        for <gclcip-std-proposals@m.gmane.org>; Thu, 10 Aug 2017 10:00:01 -0700 (PDT)
ARC-Seal: i=2; a=rsa-sha256; t=1502384400; cv=pass;
        d=google.com; s=arc-20160816;
        b=A9J58xRlc/WXXCLgJX6A/a1jYkjBkF62x6wiIAhQDeiAnjJ+yvs+kkoegZTlpk6P37
         4cJqhfznXC9mdPSOkyV1/kRSCtOXuZPcy0S4b364yORRdl08K1tySRzutoMwwKqXZVWU
         K1bSilCVPWs29ldEOTHhv/DNMFCpYZyJd2MEsYzxfX2juVV8ReiiW9/+xd+kQVTpY/JG
         Jqx3bU9ucFHKXVbLS+OH9kq+BQZjvGMW2wUASid2bEPkJN8zyiXzrAGNN11/fLLLu7iE
         b1Vr9ppLDBckfQo4RXzyHq5P6Mp3+RluxSwSy45kmOCzqk5ruvH7NR/VvB8FX1AazZrO
         urkQ==
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:to:subject:message-id:date
         :from:references:in-reply-to:mime-version:arc-authentication-results
         :arc-message-signature:dkim-signature:arc-authentication-results;
        bh=7oAglHRk1gk5digGbzc/GbAWOyeUCYvRMMW2svLRx/c=;
        b=zrAzizgWshR2evuMyKgxSrbfyX6Cm9bMeXSuKaydLiPhdlrG33H7wwWDHVKnJi/9t1
         2yRkDdahCiSDrzH/k62m/3x8g3AXl5HPiggiK4bU3/uOkr3r4QQBiTgGB2NWDaablDao
         yNQnk213JLUr98AtVYQM2nWGRnH97789rORF8KiRKXYmvhRl8Q0uQN5VwCYhwY0VZJ/x
         iX6Oh0BlhqaZbY1ASZTAh53LbucXo6hXNCB3a5yNLlx3MotgqmDd+EpwykTMk8fMZPpO
         +TYk4f+FK2/FAPs6DE7Q1A/c+jx7FR5X3x9f6Iqmbx0FmKPpiR8+E12qsM6F9ChSAXHt
         Ec/g==
ARC-Authentication-Results: i=2; mx.google.com;
       dkim=pass header.i=@gmail.com header.s=20161025 header.b=JbvhLdBj;
       spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400c:c08::244 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
         :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=7oAglHRk1gk5digGbzc/GbAWOyeUCYvRMMW2svLRx/c=;
        b=UAsGc57fEzq4pMFsDkcvrxBdBsujQNSLtzDnkmLJKBCduIDY8X/ACWDOF84lbi+t4G
         tNkEM58GxaOGdeFCUMuK2Yiddirj8IW9DGxxJIewMDyhnr/JOnPLiEN6IB0B9Lct0Zhs
         5Nbux6dWUptnEdQGTW+/Ya8N99RIXGBdAXeg2rx/iaZFh4LNMqYQPvZ9eFwszHBRb8ZB
         beF0i2s/akUoO17rQH3kovEhsUoEP1Rud7MKCQLIRawXMllZfzzM6Re0DGdZ29REkhOw
         Ygb6J1ZolhhC4N6hipxQwEdpu5QoyV2eravaWEzMuRR2JHfFxi/4eyIazBRjvheOPM4h
         FyNg==
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: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=7oAglHRk1gk5digGbzc/GbAWOyeUCYvRMMW2svLRx/c=;
        b=YuiAmu7IS6xSh8R2TwN6NpP2vRETaY8YDHjLc9cMA2KtzZL7mwm7wtjiQJ8EZflMZ4
         tdR4gyLrjt0KWblOOBP376mrJ8rAEvbUqasFNh0J0I2zcw1+0FObF1v4io7XPnzJkaNE
         lyE18R82GZ1OYHFmtrl+jkcabj57BGPvtdUS107JVuQ71cjnZIgqiIokCCls+ArbB4DR
         GwnJA0nn+vgP5b61iceeK7+qx3pPwNW2GnZa9VvhMrAVoNRysQHdg2XVKer2viexsXgC
         E3gpCug2MVvAvpKNDj/jzj1vIM2t0wZJX7pPr3C5LwuctFW+dE888E0Yn4A7O+Yx3yYL
         h7tw==
X-Gm-Message-State: AHYfb5h5IlwVln8y2dt6uwhcUJjSBcb9Vujkz9JGIz0+OTvBpKtRv95Y
	p42OztCpVp0shpz+
X-Received: by 10.200.41.9 with SMTP id y9mr7923431qty.54.1502384400870;
        Thu, 10 Aug 2017 10:00:00 -0700 (PDT)
X-BeenThere: std-proposals@isocpp.org
Original-Received: by 10.107.31.206 with SMTP id f197ls6715987iof.21.gmail; Thu, 10 Aug
 2017 09:59:59 -0700 (PDT)
X-Received: by 10.176.92.108 with SMTP id a44mr9135802uag.88.1502384399648;
        Thu, 10 Aug 2017 09:59:59 -0700 (PDT)
ARC-Seal: i=1; a=rsa-sha256; t=1502384399; cv=none;
        d=google.com; s=arc-20160816;
        b=d6beKrGyZDkQEimW3hnRryBvyGyrh86Ookx7iHl96kGRWJZ0vZsW5EffbGo7MXM4lA
         VElzjTXanX/GO+Eu2hc0K9i0uC5ZlIlfbh0itp4VibY2hsJx1zHPOcxpCLkPrlZcG0aJ
         cdqSV3Su4V/phy4kDIKTkmYXbExXIk6CqAKclCTbnuaTBxbI29Ywxwajsq+LWdMr2pQd
         U3TyUrIqg1HVLMpyiT3NlYhKK97gdNovVJPPhkiAoQ2Aa4CPl0U45C/5l8mBDbLgDnX8
         ofitU/abm85RoTzdwv4H8c6WKKHpSHnC8Ao3PplUxSBalSDi09q6DrAGABhTalWQ9skS
         QVdA==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
        h=to:subject:message-id:date:from:references:in-reply-to:mime-version
         :dkim-signature:arc-authentication-results;
        bh=EBKQTRCSM39zfS0HPw+vJ1b0EsdLNlNVppm2eYEPg/A=;
        b=jzjw698m8TrkamDZVmds0i52Z0eRoW0xwxYsrdP088TRrsLSBAUlJo8vIYWBxKNqxC
         oGlOLqm+8zVlUzx/t08Lb7nozGmdcRxUEvC4/0PaSzKSpaV33clvVminpLlAcz2sIBIq
         /eKOQJOZKjFDoN9FNpJY4eUkmhPv22KF0M2WmbVo8qORXl1U9Jf7TBFbTyrMY4XSNqm2
         RsuVpN0hy6I/DOzHu8Z4OABTKVb/h2LpV1IslhKjCNnhvECbg1MWLlG9I5bYqlUtfwwV
         LYvpV1lzNh1pVcxcAND/Wvowg7p+9rbzSsDanavH4t8C6dyF7ZPXgj2gkFbjDtRW5bLH
         vYmA==
ARC-Authentication-Results: i=1; mx.google.com;
       dkim=pass header.i=@gmail.com header.s=20161025 header.b=JbvhLdBj;
       spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400c:c08::244 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-x244.google.com (mail-ua0-x244.google.com. [2607:f8b0:400c:c08::244])
        by mx.google.com with ESMTPS id k12si3596457vke.264.2017.08.10.09.59.59
        for <std-proposals@isocpp.org>
        (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
        Thu, 10 Aug 2017 09:59:59 -0700 (PDT)
Received-SPF: pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400c:c08::244 as permitted sender) client-ip=2607:f8b0:400c:c08::244;
Original-Received: by mail-ua0-x244.google.com with SMTP id d29so679170uai.2
        for <std-proposals@isocpp.org>; Thu, 10 Aug 2017 09:59:59 -0700 (PDT)
X-Received: by 10.159.37.70 with SMTP id 64mr7911995uaz.195.1502384399354;
 Thu, 10 Aug 2017 09:59:59 -0700 (PDT)
Original-Received: by 10.103.103.65 with HTTP; Thu, 10 Aug 2017 09:59:58 -0700 (PDT)
In-Reply-To: <17b1a3ed-1590-21ce-328d-053b86d6fc0b@gmail.com>
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=JbvhLdBj;       spf=pass
 (google.com: domain of ville.voutilainen@gmail.com designates
 2607:f8b0:400c:c08::244 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: <std-proposals.isocpp.org>
X-Google-Group-Id: 399137483710
List-Post: <https://groups.google.com/a/isocpp.org/group/std-proposals/post>, <mailto:std-proposals@isocpp.org>
List-Help: <https://support.google.com/a/isocpp.org/bin/topic.py?topic=25838>, <mailto:std-proposals+help@isocpp.org>
List-Archive: <https://groups.google.com/a/isocpp.org/group/std-proposals/>
List-Subscribe: <https://groups.google.com/a/isocpp.org/group/std-proposals/subscribe>,
 <mailto:std-proposals+subscribe@isocpp.org>
List-Unsubscribe: <mailto:googlegroups-manage+399137483710+unsubscribe@googlegroups.com>,
 <https://groups.google.com/a/isocpp.org/group/std-proposals/subscribe>
Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:33801
Archived-At: <http://permalink.gmane.org/gmane.comp.lang.c++.isocpp.proposals/33801>

On 10 August 2017 at 19:53, Matthew Woehlke <mwoehlke.floss@gmail.com> wrote:
> On 2017-08-10 12:36, Ville Voutilainen wrote:
>> On 10 August 2017 at 19:35, Matthew Woehlke wrote:
>>> I don't think *reflection* can help with CRTP... *metaclasses* on the
>>> other hand...
>>
>> I consider code generation a part of reflection. Introspection is
>> different, and more limited. :P
>
> Ah, I see... language impedance ;-).
>
> (I suspect Nicol and I have the same "understanding" of what
> "reflection" means... i.e. to us, P0707 *builds on* reflection, but
> isn't *part of* reflection.)

Well, what is part of reflection remains to be seen. We don't have
anything published yet, and
there's been some serious thought to go towards something that's less
template-y than the first reflection
proposals were. In addition to that, we are seriously looking into
what code generating compile-time
facilities should be like (and look like). It seems clear that we want
code transformation and generation
capabilities. Whether metaclasses will be part of that picture is
another matter.

-- 
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/CAFk2RUYys9RHq1y%2BVGor55HHz5XqPyixrexPKp5mOAnuSMW%2Bow%40mail.gmail.com.

.
