220 39098 article Path: news.gmane.org!.POSTED!not-for-mail From: Zhihao Yuan Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Concept-defined placeholder type Date: Wed, 11 Jul 2018 20:53:47 -0400 Lines: 75 Approved: news@gmane.org Message-ID: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="b1_5c72e06cfa02d813d4a7a3b406cc737d" X-Trace: blaine.gmane.org 1531356706 6764 195.159.176.226 (12 Jul 2018 00:51:46 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 12 Jul 2018 00:51:46 +0000 (UTC) To: 'ISO C++ Standard - Future Proposals' Original-X-From: std-proposals+bncBCSKRWMD4EHBBIGNTLNAKGQEFSN33FQ@isocpp.org Thu Jul 12 02:51:42 2018 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wr1-f69.google.com ([209.85.221.69]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fdPpe-0001fh-0A for gclcip-std-proposals@m.gmane.org; Thu, 12 Jul 2018 02:51:42 +0200 Original-Received: by mail-wr1-f69.google.com with SMTP id i16-v6sf3352584wrr.9 for ; Wed, 11 Jul 2018 17:53:53 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1531356833; cv=pass; d=google.com; s=arc-20160816; b=FbYZRTxeAoNxxOFzD2wcGEExxxCHb8Hh4zGcnPhKICsSmZEcPzWFZH46U3FXhw1DFm b6dvBNi30le0r34ZAtu+LA4akyap3xFMIUDKDZRbsgyqF04Z7ThKzB22zMGrDHZwHOHg YCGwqJYeIFTlxIn4tBd4DE66hLZz9D6mnWuDf0Dv9iIFwbmOMMl/1e7Aozrwt/ZkJ006 rqlfcUWRE9x/dYNGMpEblnlJa64jjzqQU15BdiJSPsSo5FS/Ngw2zhfFr8kB+JYLxb23 fyoG/uRgu/ynDSXgWPu2z7CaNPttfeJY8Eda9CSGwCbQrjZNFr+b1kHgsOZ3PF7om1qP SwsQ== 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:mime-version:feedback-id:message-id :subject:reply-to:from:to:date:arc-authentication-results :arc-message-signature:dkim-signature:arc-authentication-results; bh=d6MsmQNrls10WLc5nu9kR1gcaR1rGW+WhTlBb+U9eXg=; b=t3HVwA6BsmDFaA0Htrm0ilBNENz5k9sO0US9D3Gn7tLP1bsLobI8QFoA6Yqh/9+BE9 gLpM/UbE7+MlpkJlVyuxRwKOhueytx5eyUsgVEfxJ3fF97Spfkb7mJ4Rz7zKt3bmffFz HIgjDaobLZBFXfJeQcvauO0di5VYqz4HkwnflssIMheuZmdJv/iKPo1/yKjMk5KBaWTh qOCdIOT59QZl+0eGQXad+oPitgcp7DFzfD7uUDawMUFWEhRZSS40dOpcgQTHwo0NK0RD sNI1f33CSKVtpJ+9Jnorj7oeEGL2oYCyYuugQMin+8rQ3TRNCKmQcQ+b2hTULegSsEj8 etCA== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@miator.net header.s=protonmail header.b=q6bOpQMo; spf=pass (google.com: domain of zy@miator.net designates 185.70.40.132 as permitted sender) smtp.mailfrom=zy@miator.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:to:from:reply-to:subject:message-id:feedback-id:mime-version :x-original-sender:x-original-authentication-results:precedence :mailing-list:list-id:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=d6MsmQNrls10WLc5nu9kR1gcaR1rGW+WhTlBb+U9eXg=; b=O9iBRVOgVRuRRfV/3HRliI081dQrHn22RWPJ9zSXcT2R5entQ7traUhlquQYfkRqSy bxnHgPz2yOlRjA9iekht66qYqzpQkg/eyaADkoOtApemugtehzvh/IL4J7HNYh8UoamC VbLzM6nIjoRaJ+Zx2uePv2ard9TVsOgFBqODEIg66+Y6N941ysfoRRk1KtEWGGPiOKBd NQRyiq1CRxA9tyb6Av5BxDJnQ1rJIZkFL2c5mjv69sY0QAOrZPhiW6xmjKm/oo5FRmZs Fhz6SlAmk9RqnMjzurqW/HX11giu4cjlZ1icyfdqp0ro49wd89dFg0AEgNZqCUSGYYGI x4gw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:to:from:reply-to:subject:message-id :feedback-id:mime-version:x-original-sender :x-original-authentication-results:precedence:mailing-list:list-id :x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=d6MsmQNrls10WLc5nu9kR1gcaR1rGW+WhTlBb+U9eXg=; b=RjvaM13OOW5khV2lpTNMUGLxN00FrUAZaBz5pXAatuDq+RgY2LeUuOuJD8uvso2t0b 5rg+zDQJUPI6hZ5pYew85hzI+DVb6oaVVn8o2gJoZu9f8GKTGi9Mw1Ys2Eg+fO0AbGpC 8uJn7yibB1fFaIcuPdewZEGHztn27dSmqR5uGVheUs9ZVUsBb241Q1+wvS+IH7fFQ/5l 08lXS1U2F2avHQo2TYW9q8eDux9fbo1bcmihu5MWub02McK9MIU9Prz6V6GsE/PuEBwm eTDjMY83p5mRnf3rCUvWsvo364O24kZIiYSjFbUxgUirGdrA/BdBqO3LlUTbkTtpXQ7u 1HQg== X-Gm-Message-State: AOUpUlHVv5gsrbDbdAbm7A7M4n5mSgY2VMc/cS1/GUt0tFoRbL7o0miE KdqSgzjDDnGG1s80Mz8B2tp6fQ== X-Google-Smtp-Source: AAOMgpe49pwMoLHUFoOmsn/6UwTnPZm2R39kG5/W/7qrdVaIGwXZGBaA6YdKuCR0hyYasSQJMl94XA== X-Received: by 2002:adf:e943:: with SMTP id m3-v6mr12506wrn.13.1531356833160; Wed, 11 Jul 2018 17:53:53 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 2002:a1c:ef02:: with SMTP id n2-v6ls801173wmh.3.canary-gmail; Wed, 11 Jul 2018 17:53:52 -0700 (PDT) X-Received: by 2002:a1c:7d58:: with SMTP id y85-v6mr22997wmc.91.1531356831989; Wed, 11 Jul 2018 17:53:51 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1531356831; cv=none; d=google.com; s=arc-20160816; b=Nvb+rJwuI2cQSvb3p6SegCVgPDtHD/LGnL7RlXsrKb1LY/1Fr4GmDAddyhO6UL6tKq T3VdeyL2HNAkHZlTtelHw86r4sf5TvmFyH0wXaHXsVlK7F8Wyx94X2LWD6Vl7k4gi/Bd G+PZg8vGfvKeNRNds1u9Kq+/FqvCwO9IUuROr/Rf0MakmSv0Ehkp2IlvxkGM3EWXMEug ehXJn29YcZoeucr1FQRt4L1vnV0oHKQBar0/8pF3N16HSUlomWPMceo7L3ZnnemxlN++ c2TC8jggNMwtD0OM/OXOg7IgLd7cgOGe9BF2uibF/Ayu2haSYwgvO9atjTrrHmvAbiGS WG3w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:feedback-id:message-id:subject:reply-to:from:to :dkim-signature:date:arc-authentication-results; bh=40GZZJMaR8ZNs6dH1TxTGQXEv/W+7+h/HrMWM4NcsYI=; b=TutTxLPg9chEb/1+3bti7rX8uH8R6ZHn6aGLOsd542DIf/NcG7/rxRclAdgwEFueQA /Wmn6rkZUWHgpVnaXpYaRFvP4gLvG+K+Ebt7qN+mmNWgAmtKvhIRJMj+qOrCfRCiSgaK 1IAv0b7OygD76pnKlkrrf2P1s18H3NxAwdAZ3B0DvxWIP0PJ2BdLCmeHQJSf+IaI8GDE 2Gj+lt8QY7XeyE11h9Fr82GGNQXbmGyibiuSDw/RaJPQbobga+sMS8+/TycYrdH8vKXi i7EHD4mHyETiI49SSB3PLvARHdJlkgrscEKJBiIhRbDWjHykhrHOWBzTjSYI8xlbM5Hv X1Nw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@miator.net header.s=protonmail header.b=q6bOpQMo; spf=pass (google.com: domain of zy@miator.net designates 185.70.40.132 as permitted sender) smtp.mailfrom=zy@miator.net Original-Received: from mail-1857040132.protonmail.ch (mail-1857040132.protonmail.ch. [185.70.40.132]) by mx.google.com with ESMTPS id b5-v6si2345996wmc.125.2018.07.11.17.53.51 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 11 Jul 2018 17:53:51 -0700 (PDT) Received-SPF: pass (google.com: domain of zy@miator.net designates 185.70.40.132 as permitted sender) client-ip=185.70.40.132; Feedback-ID: xu1i2ADzKwGyrUl8KbXpsa1PQSI0Bc21qlX1V7gpMylRDQPR42YBpWcLHW4brubvCmGM18xDo5tgsD-vWFu_cQ==:Ext:ProtonMail X-Original-Sender: zy@miator.net X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@miator.net header.s=protonmail header.b=q6bOpQMo; spf=pass (google.com: domain of zy@miator.net designates 185.70.40.132 as permitted sender) smtp.mailfrom=zy@miator.net 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:39098 Archived-At: This is a multi-part message in MIME format. --b1_5c72e06cfa02d813d4a7a3b406cc737d Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi, folks: I=E2=80=99m drafting the paper to propose BidirectionalIterator T; T it =3D foo(); https://hackmd.io/s/SkyQwe47Q# Currently missing technical description, but I tried to explain some major points in =E2=80=9CDesign Decisions.=E2=80=9D Comments are welcome, especially criticisms. -- Zhihao Yuan, ID lichray The best way to predict the future is to invent it. _______________________________________________ --=20 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 e= mail 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/wKt6BIikQ9kr3u_mQ2oR1vvx8Uj7JLabshrk6DkzkFXpExhO= UcFUc_LbGjzKQ9Z_nsrjEQrvTE5d7-8FgpX_Q-dyOVcAUaiZdsCZZsX0ctQ%3D%40miator.net= .. --b1_5c72e06cfa02d813d4a7a3b406cc737d Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

Hi, folks:

I=E2=80=99m drafting the paper to propose

Bidirectio= nalIterator T;

T it =3D foo();


=C2=A0 https://hackmd.io/s/SkyQwe47Q#<= o:p>


Currently missing technical descr= iption, but I tried to
explain some major points in =E2=80=9CDesign Dec= isions.=E2=80=9D
Comments are welcome, especially criticisms.

=C2=A0

--<= br/>Zhihao Yuan, ID lichray
The best way to predict the future is to in= vent it.
_______________________________________________

=

=C2=A0

--
You received this message because you are subscribed to the Google Groups &= quot;ISO C++ Standard - Future Proposals" group.
To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposa= ls+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.c= om/a/isocpp.org/d/msgid/std-proposals/wKt6BIikQ9kr3u_mQ2oR1vvx8Uj7JLabshrk6= DkzkFXpExhOUcFUc_LbGjzKQ9Z_nsrjEQrvTE5d7-8FgpX_Q-dyOVcAUaiZdsCZZsX0ctQ%3D%4= 0miator.net.
--b1_5c72e06cfa02d813d4a7a3b406cc737d-- .