220 39624 <173c5a6d-5b9e-4cd3-abee-bed7e53f06e0@isocpp.org> article Path: news.gmane.org!.POSTED!not-for-mail From: zhouhongyu1104@gmail.com Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Is it necessary to add a stronger keyword than `const`? Date: Thu, 9 Aug 2018 22:38:03 -0700 (PDT) Lines: 110 Approved: news@gmane.org Message-ID: <173c5a6d-5b9e-4cd3-abee-bed7e53f06e0@isocpp.org> References: <6e5d4159-0acf-4fb7-825a-40eb1540fb2d@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_659_463568043.1533879483251" X-Trace: blaine.gmane.org 1533879359 31721 195.159.176.226 (10 Aug 2018 05:35:59 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 10 Aug 2018 05:35:59 +0000 (UTC) Cc: zhouhongyu1104@gmail.com To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBCE4LGOIXEGBBO6JWTNQKGQERPW2VTQ@isocpp.org Fri Aug 10 07:35:55 2018 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-yw1-f70.google.com ([209.85.161.70]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fo05a-00087e-9d for gclcip-std-proposals@m.gmane.org; Fri, 10 Aug 2018 07:35:54 +0200 Original-Received: by mail-yw1-f70.google.com with SMTP id u1-v6sf11486950ywg.6 for ; Thu, 09 Aug 2018 22:38:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:message-id:in-reply-to:references:subject :mime-version:x-original-sender:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe; bh=odMahP/f8j8WzTeJXXFqq/p8ySnOeysnRWgTxb/qYls=; b=vQKFb93qZs7VQ+/huvBtDseUKo758l2ykyEOL4urgvMr7M8UkVBoEYNnuyRJL9tvEF I4TFhcbtWppqkvG64aOz+d6L5F8Fxxqq5o6Zvrv8yqM0KU6KUN7YEPwDaWmdYZ/0HUs2 GyroPBRVM/dNlFS9kLqB9PjtAloj6s/b1X0JpJ/EptZPmhrSuWDpBoUleNQf3rEaCUFh LES6r7IlucAzQBDFZ1/+LVmlCpTHz5y3z0bgIO3oazsF7PJIUdyaUD7/2v1UH1z/IveL AzgBSkDQ+lal7JyPtk+kqk8T2Gr6pGyQF7LIYsAgIEOtIQcrEzgOPUJPi5b+DIimrfPi Y/PA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:message-id:in-reply-to:references:subject :mime-version:x-original-sender:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe; bh=odMahP/f8j8WzTeJXXFqq/p8ySnOeysnRWgTxb/qYls=; b=VBnu/oJmkViOQjhXtIo/a2AI9KEQ02VaXbBxywtHwLOWAlHWP0CeiKw3TiYi9WL7Ir SOCBDseByB2QmTs3qmZHN5ohPCylgcTdvn1zTKcAou3R770WDovj3b5PQsShwxHUnN7T tHJBXYZucZ7pXoyk7dPi6cIoqAWaKmSkaU6ThqAXS9YA7VMM5A3so6ozZw44dPgl7Rq6 hq9hPEsixtSv2MP73EXtRf9QUzhZdldPjQhXp26G549HzUCrV8IEKPx206wnJtx7meWa 63pXkwnxzrglANElLIAcm9AS/x3dzBI5r52q7JoEzKms4bM2nKzGBOTZ9zl6lZbBi6SQ qOYg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:message-id:in-reply-to :references:subject:mime-version:x-original-sender:reply-to :precedence:mailing-list:list-id:x-spam-checked-in-group:list-post :list-help:list-archive:list-subscribe:list-unsubscribe; bh=odMahP/f8j8WzTeJXXFqq/p8ySnOeysnRWgTxb/qYls=; b=byMLeyiG6TNQr9AXyfkBjI8eCGW7t+yAvN2hyTTS0num9AoLfl4whXtIhVXN1Quy1x elxTlOYhQ1iaXAre6Gf9TUNjxC1UMSFCP0Daxebl1dXHGv26opBgV4lNKJuaUxsKVGN6 zryL1P17SVuGgmOoL7SQYE3rkFAHQDQDZk0T+e/7oiSlGTL5Qg3wnCcSXxzicSS7PzNR +GgCACi4f4UvF/NFa5VRsRrCOZbZTy1PM3bU4w+Mm60T/DQTG871jzO1U5dFIJ4qrQiA dDN3Hkt9u7Dkwjv30YUBhOv4IMwtw00pgJiPvZoKMG940WRIp8yvgrjtAv+0Xrl3NLoA ocug== X-Gm-Message-State: AOUpUlGnE5KQ9V2ln57PYwhSUtK+0+E2eRYq0OVrEktXGl7k0G7xqdWJ ngiD3dZ7PsRrAsO6N2d633ZC/A== X-Google-Smtp-Source: AA+uWPwNtOdpsLniFfCfhQOTY6cQ66S+XUzC3JIU8lzpCRBvm/ruq1gOGLiA0IAaGBioFvRfWiYCEw== X-Received: by 2002:a81:a10f:: with SMTP id y15-v6mr1507906ywg.231.1533879484755; Thu, 09 Aug 2018 22:38:04 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 2002:a0d:c101:: with SMTP id c1-v6ls1654348ywd.18.gmail; Thu, 09 Aug 2018 22:38:03 -0700 (PDT) X-Received: by 2002:a81:a611:: with SMTP id d17-v6mr121102ywh.2.1533879483725; Thu, 09 Aug 2018 22:38:03 -0700 (PDT) In-Reply-To: <6e5d4159-0acf-4fb7-825a-40eb1540fb2d@isocpp.org> X-Original-Sender: zhouhongyu1104@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:39624 Archived-At: ------=_Part_659_463568043.1533879483251 Content-Type: multipart/alternative; boundary="----=_Part_660_1719754562.1533879483251" ------=_Part_660_1719754562.1533879483251 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =E5=9C=A8 2018=E5=B9=B48=E6=9C=888=E6=97=A5=E6=98=9F=E6=9C=9F=E4=B8=89 UTC+= 8=E4=B8=8A=E5=8D=885:52:42=EF=BC=8Czhouhon...@gmail.com=E5=86=99=E9=81=93= =EF=BC=9A > > *const* can only prohibit modifying members. Is it necessary to add a=20 > keyword, such as *blind*, to prohibit member variable access (except=20 > *this*), because sometimes some methods need to be inherited by=20 > subclasses, but these methods should remain stateless. > > For example, if you have a long and long member method, it takes a lot of= =20 > time to determine if it has modified or accessed any member variables. Of= =20 > course, it can be a static method, but there is no way to override it whe= n=20 > using polymorphism. > Tell other programmers that this method can't rely on (including accessing)= =20 any member variables, just like ordinary functions or static functions, but= =20 this function can be used inherited, so they can be guaranteed that this=20 function is stateless. --=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/173c5a6d-5b9e-4cd3-abee-bed7e53f06e0%40isocpp.or= g. ------=_Part_660_1719754562.1533879483251 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=E5=9C=A8 2018=E5=B9=B48=E6=9C=888=E6=97=A5=E6=98= =9F=E6=9C=9F=E4=B8=89 UTC+8=E4=B8=8A=E5=8D=885:52:42=EF=BC=8Czhouhon...@gma= il.com=E5=86=99=E9=81=93=EF=BC=9A
const=C2=A0can only prohibit modifying members. = Is it necessary to add a keyword, such as=C2=A0blind, to pr= ohibit member variable access (except=C2=A0this), because som= etimes some methods need to be inherited by subclasses, but these methods s= hould remain stateless.

<= span style=3D"font-size:14px">For example, if you have a long and long memb= er method, it takes a lot of time to determine if it has modified or access= ed any member variables. Of course, it can be a static method, but there is= no way to override it when using polymorphism.

Tell other programmers that this method can&= #39;t rely on (including accessing) any member variables, just like ordinar= y functions or static functions, but this function can be used inherited, s= o they can be guaranteed that this function is stateless.

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