220 14341 <4610134.1FNuJdPqBg@tjmaciei-mobl4> article Path: news.gmane.org!not-for-mail From: Thiago Macieira Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Visual C++'s __identifier keyword Date: Thu, 30 Oct 2014 20:14:38 -0700 Lines: 44 Approved: news@gmane.org Message-ID: <4610134.1FNuJdPqBg@tjmaciei-mobl4> References: <7e589557-cb3c-4323-9565-e6b859df0e76@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Trace: ger.gmane.org 1414725335 25357 80.91.229.3 (31 Oct 2014 03:15:35 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 31 Oct 2014 03:15:35 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCB4TK757YBRBJH5ZORAKGQEWCA46RA@isocpp.org Fri Oct 31 04:15:30 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ee0-f71.google.com ([74.125.83.71]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Xk2fl-0000ll-L3 for gclcip-std-proposals@m.gmane.org; Fri, 31 Oct 2014 04:14:45 +0100 Original-Received: by mail-ee0-f71.google.com with SMTP id e51sf207294eek.10 for ; Thu, 30 Oct 2014 20:14:45 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:subject:date:message-id:user-agent :in-reply-to:references:mime-version:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe:content-type; bh=0hcoJdnQNYuT1uZtcacvirQH04P348kPYZ7dOsMoG7I=; b=FlA67eCufniV59VED9aMbfGDfFcdH3xVSEcN5VPfZeE7sysCpO15K5BFxrlArXz9DP x3BOhfb0/ejtsqi0ugg4rUmFGG75e6mNRVcodI87nxMCStVbFKG3FFAfL9KE2Mib+Fpx pNlbSA7rnDj3Y04DgBbnjS2jMrTt4TmhvXKJZU4l7vRhJZgwYMVB/WGCnl60fxQP/B+3 K8pw81HXErNHWN85plPghXB/uAlSx7RXSdWADLTuy+cRUeLdyiqKA8XOsbcDAqZh8Vzc BQd2JHh4izCe2hEO+OXCuUOuP+VboShgcvJXMaBI8mVz88wCDgD1ul58ojQGBWmaVoTm mdaA== X-Gm-Message-State: ALoCoQmqNilyin4ovANcdmmbctElpzqCifXo8Ar1T+/ZVKnGmgEqBm4BnJYrZNLXVr5g8IrTxomg X-Received: by 10.180.98.101 with SMTP id eh5mr60823wib.7.1414725285326; Thu, 30 Oct 2014 20:14:45 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.152.6.5 with SMTP id w5ls419643law.71.gmail; Thu, 30 Oct 2014 20:14:43 -0700 (PDT) X-Received: by 10.112.140.135 with SMTP id rg7mr23281054lbb.24.1414725283643; Thu, 30 Oct 2014 20:14:43 -0700 (PDT) Original-Received: from gondolin.macieira.info (gondolin.macieira.info. [78.47.120.188]) by mx.google.com with ESMTP id w6si14654936lad.65.2014.10.30.20.14.43 for ; Thu, 30 Oct 2014 20:14:43 -0700 (PDT) Received-SPF: pass (google.com: domain of thiago@macieira.org designates 78.47.120.188 as permitted sender) client-ip=78.47.120.188; Original-Received: from tjmaciei-mobl4.localnet (unknown [IPv6:2601:7:1c80:906:5852:e362:d258:a879]) by gondolin.macieira.info (Postfix) with ESMTPSA id BD11811A66A for ; Thu, 30 Oct 2014 20:14:42 -0700 (PDT) User-Agent: KMail/4.14 (Linux/3.11.10-21-desktop; KDE/4.14.0; x86_64; ; ) In-Reply-To: <7e589557-cb3c-4323-9565-e6b859df0e76@isocpp.org> X-Original-Sender: thiago@macieira.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of thiago@macieira.org designates 78.47.120.188 as permitted sender) smtp.mail=thiago@macieira.org 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:14341 Archived-At: On Thursday 30 October 2014 12:52:10 Myriachan wrote: > extern "C" int __identifier(class); > > __identifier also may take a literal string as a parameter, allowing weird > characters in identifiers. I would say that the effect of using a literal > string that is neither a legal C++ identifier nor a C++ keyword (i.e. > something that'd work without being a string) has unspecified behavior, > leaving it to the implementation to decide whether such a thing is > meaningful or an error. This literal string feature can be used to access > mangled symbol names if used in conjunction with extern "C", or could be > used to put dollar signs in identifiers. And yes, > __identifier(__identifier) is legal. How about an identifier containing the closing parenthesis? You probably want to have this as a string literal. With GCC: extern "C" int class_() asm("class"); extern "C" int closingparen() asm("("); Or, maybe just use the backtick like SQL does: SELECT `SELECT` FROM `FROM`; But aside from external names, what use would this have? I'm not sure I understood your example for wchar_t/char16_t and, to be honest, it's not relevant because the standard can assume that the implementation fully implements the standard. -- Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org Software Architect - Intel Open Source Technology Center PGP/GPG: 0x6EF45358; fingerprint: E067 918B B660 DBD1 105C 966C 33F5 F005 6EF4 5358 -- --- 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. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/. .