220 27634 <814750ea-1ef8-4792-9b50-aec0bae4d841@isocpp.org> article Path: news.gmane.org!.POSTED!not-for-mail From: inkwizytoryankes@gmail.com Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: this in non-member functions Date: Fri, 5 Aug 2016 10:17:09 -0700 (PDT) Lines: 153 Approved: news@gmane.org Message-ID: <814750ea-1ef8-4792-9b50-aec0bae4d841@isocpp.org> References: <2351486.cE391vEbrj@tjmaciei-mobl1> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_760_514272996.1470417429901" X-Trace: blaine.gmane.org 1470417462 4415 195.159.176.226 (5 Aug 2016 17:17:42 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 5 Aug 2016 17:17:42 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDDLTAGNTIBBBF4USO6QKGQEM6SZJOA@isocpp.org Fri Aug 05 19:17:34 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-it0-f70.google.com ([209.85.214.70]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bVikD-0006Nk-Ku for gclcip-std-proposals@m.gmane.org; Fri, 05 Aug 2016 19:17:13 +0200 Original-Received: by mail-it0-f70.google.com with SMTP id i64sf77341615ith.2 for ; Fri, 05 Aug 2016 10:17:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to: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=kJvagg0ZBHw33M5xh//FGf/iQaV6OaSCHAnTeu7Uoig=; b=O+p1aU4RFbKyBxCJQf+y1rAqjZyHSUlQ/s57pZ5YdOS3uYN40Pk4/4OxR1a8PZlNdM kl8a140w/fCRKm5gijYA+JFon+tEhJfr5Lt7Laa2Q4m0UT1WnhNdNzQXk4xTHC2WC/py BcpT6GfOEEkEjhccxV2liAMOFOqz/MbFtsqEuoEDvL+MqZTlhg7Qvl1a2KRjdtz92DW0 HA5g60tU9l0KZgdB9ovZAO/AkDrt29kIeFXf1XEIXDdpOrrwuipBkQ6lIhJHH3AXHLsY czy38O3nTjOC/lcARxAzOuBdpvnvyDkXTT8Hy9feKzlEdZahQI2i7PnfsUFidLVgXrPz ddyg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to: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=kJvagg0ZBHw33M5xh//FGf/iQaV6OaSCHAnTeu7Uoig=; b=LepTpKS3jYJKOJGUm5+WgnUgzVD/k3pBZ7KbhdvrA2PBJbJMvJx7YNhwJZJJfKwZAA 0sGgLJdGlIYbJMVBZE2RBgAcDN8NFDLNZLCMxeJfYfBsyYW/3lEDTegI5UrYaFIsBojA w0wkvlf18U9JU096PMSnW2T0GE/vw8SjX1Yi7qX9kXz2RcOia2Y1pHjHtJC8eKRM7SYE atT+Ide4W3PlHBj5O/BMbJrQqyTHCkBH3QbOqWBpHZNc1nYGgjl/rNCqphsxj0VGqWu/ 5aTULpnmT5kAKX4kozOIbXI0gWEf571495NmGsd8LoG/GvjIYjyRiCZ0D6Dup8F1g6CO +O9g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to: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=kJvagg0ZBHw33M5xh//FGf/iQaV6OaSCHAnTeu7Uoig=; b=dFexxrbG3yEK5fWVQJu1OBcNzuvDitPLeG3Xh3KZ2XVUmiIjBRAVReX56SmpXmuQzu 9VQxTgBcNV2eeb4faH78W1cAoJC/ljFXnWRjyGIlLw6IdlN9jNzg/ziEGbigTed+Fwgx hoXxmOeQWokeyuVaxzz0rNDgf+0lhblB8NecbayQJE49zgEWFhuQ/VXoAevQFAsERD4h ZqULvTP4fdInvkdXozDR414Cki9wOSe+JrlydPGxIZKYhYv+X49K1N814kUFU91UqijO djc8trn/sjKrovuBMi2KpvhnpI2aHcCF2xZvGdLhxEOptzeTO2ZHYOL5kRyMtrelXg6e OPtg== X-Gm-Message-State: AEkoouuznknn6GtryBuV+FcnWtoyjfCTfUB5fs0FvLe6/x40WG61G5Cv123AFBNHjtrrgQ== X-Received: by 10.157.39.41 with SMTP id r38mr65389923ota.8.1470417433353; Fri, 05 Aug 2016 10:17:13 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.107.15.96 with SMTP id x93ls979166ioi.38.gmail; Fri, 05 Aug 2016 10:17:11 -0700 (PDT) X-Received: by 10.36.227.207 with SMTP id d198mr200303ith.4.1470417431207; Fri, 05 Aug 2016 10:17:11 -0700 (PDT) In-Reply-To: X-Original-Sender: inkwizytoryankes@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:27634 Archived-At: ------=_Part_760_514272996.1470417429901 Content-Type: multipart/alternative; boundary="----=_Part_761_1231646959.1470417429902" ------=_Part_761_1231646959.1470417429902 Content-Type: text/plain; charset=UTF-8 On Thursday, August 4, 2016 at 12:26:36 PM UTC+2, Viacheslav Usov wrote: > > On Thu, Aug 4, 2016 at 11:14 AM, Bo Persson > > wrote: > > > Yes, I would definitely be confused by the sublety of the parameter name. > > I hope everybody has read the original message in the thread. > > As a reminder, this is not only about parameters, and the public-only > binding was mentioned there. The confusion that can arise because of the > public-only binding ("first kind") and because of misspelled identifiers > ("second kind") is not something new that this proposal would introduce. > The first kind is present, for example, in this: > > struct A > { > int x; > private: > int y; > }; > > struct B: A > { > void foo() > { > x = 1; // OK > y = 2; // error > } > }; > > The second kind is always just around the corner in any C++ program. > > int she; > struct foo > { > int he; > void bar() { she = 1; } // really? > ]; > > Cheers, > V. > > And what about templates? template void f(T* this) { a = 6; }; What meaning have this code? `a` is member or global value? Because member `a` is dependent name compiler need always ignore it and go for global with same name. This made this proposition unusable in template contexts. -- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. 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On Thursday, August 4, 2016 at 12:26:36 PM UTC+2, = Viacheslav Usov wrote:
On Thu, Aug 4, 2016 at 11:14 AM, B= o Persson <b...@gmb.dk> wrote:

> Yes, I would de= finitely be confused by the sublety of the parameter name.

I hope everybody has read the original= message in the thread.

As a reminder, this is not= only about parameters, and the public-only binding was mentioned there. Th= e confusion that can arise because of the public-only binding ("first = kind") and because of misspelled identifiers ("second kind")= is not something new that this proposal would introduce. The first kind is= present, for example, in this:

struct A
{
=C2=A0 =C2=A0 int x;
private:
=C2=A0 =C2= =A0 int y;
};

struct B: A
{
=C2=A0 =C2=A0 void foo()
=C2=A0 =C2=A0 {
=C2=A0= =C2=A0 =C2=A0 =C2=A0 x =3D 1; // OK
=C2=A0 =C2=A0 =C2=A0 =C2=A0 = y =3D 2; // error
=C2=A0 =C2=A0 }
};

The second kind is always just around the corner in any C++ program.=

int she;
struct foo
{
=C2=A0 =C2=A0 int he;
=C2=A0 =C2=A0 void bar() { s= he =3D 1; } // really?
];

Cheers,
V.



= And what about templates?
template<typename T&= gt;
void f(T* this){<= span style=3D"color: #000;" class=3D"styled-by-prettify">
=C2=A0 =C2=A0 = a =3D 6;
};
What meaning have this cod= e? `a` is member or global value?
Because member `a` is dependent name c= ompiler need always ignore it and go for global with same name.
This mad= e this proposition unusable in template contexts.
=C2=A0

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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/814750ea-1ef8-4792-9b50-aec0bae4d841= %40isocpp.org.
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