220 24968 <7B9B7D90-2756-4474-B5B3-8A62A6B3EB61@me.com> article Path: news.gmane.org!not-for-mail From: Alisdair Meredith Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Any purposes for $, @, or ` ? 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[17.172.204.151]) by mx.google.com with ESMTPS id wc7si5660284oeb.88.2016.03.05.04.33.14 for (version=TLS1_2 cipher=AES128-GCM-SHA256 bits=128/128); Sat, 05 Mar 2016 04:33:14 -0800 (PST) Received-SPF: pass (google.com: domain of alisdairm@me.com designates 17.172.204.151 as permitted sender) client-ip=17.172.204.151; Original-Received: from [172.20.70.235] (unknown [12.16.51.253]) by st11p01im-asmtp001.me.com (Oracle Communications Messaging Server 7.0.5.36.0 64bit (built Sep 8 2015)) with ESMTPSA id <0O3K00UD2G7DA630@st11p01im-asmtp001.me.com> for std-proposals@isocpp.org; Sat, 05 Mar 2016 12:33:14 +0000 (GMT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-03-05_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 clxscore=1015 suspectscore=3 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1510270003 definitions=main-1603050228 In-reply-to: <94de1ee2-0821-418e-a7b1-87b61ea438eb@isocpp.org> X-Mailer: Apple Mail (2.3096.5) X-Original-Sender: alisdairm@me.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of alisdairm@me.com designates 17.172.204.151 as permitted sender) smtp.mailfrom=alisdairm@me.com; dmarc=pass (p=NONE dis=NONE) header.from=me.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:24968 Archived-At: --Apple-Mail=_D8F60D55-A324-40CD-A90B-17EBD7D8D150 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 One of the reasons I had heard in the past is that as these are /not/ part of the basic character set, implementations are free to use them in their name mangling schemes. If we were to make them available for use in identifiers, we risk breaking the ABI of some platforms. You will note tha= t even using extended identifiers, these characters live in a region of Unicode that is specifically excluded from use as a C++ identifier. It may be possible to make them available for use in future extensions to the C++ syntax and grammar, but I suspect they are forever lost to user-space for class, variable, and function names. AlisdairM > On Feb 27, 2016, at 8:47 AM, NDos Dannyu wrote: >=20 > These three characters are not part of the basic source character set, ev= en though they are graphic ASCII characters. > Any purposes for them? >=20 > --=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= 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/isoc= pp.org/d/msgid/std-proposals/94de1ee2-0821-418e-a7b1-87b61ea438eb%40isocpp.= org . --=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/7B9B7D90-2756-4474-B5B3-8A62A6B3EB61%40me.com. --Apple-Mail=_D8F60D55-A324-40CD-A90B-17EBD7D8D150 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=UTF-8 One of the reas= ons I had heard in the past is that as these are /not/ part
= of the basic character set, implementations are free to use them in their
name mangling schemes.  If we were to make them av= ailable for use in
identifiers, we risk breaking the A= BI of some platforms.  You will note that
even us= ing extended identifiers, these characters live in a region of
Unicode that is specifically excluded from use as a C++ identifier= ..

It may be possi= ble to make them available for use in future extensions
to the C++ syntax and grammar, but I suspect they are forever lost to
user-space for class, variable, and function names.
=

AlisdairM


On Feb 27, 2016, at 8:47 AM, ND= os Dannyu <ndospark3= 20@naver.com> wrote:

These three chara= cters are not part of the basic source character set, even though they are = graphic ASCII characters.
Any purposes for them?
=

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