220 36820 <1755463.eZGoRBFS42@tjmaciei-mobl1> article Path: news.gmane.org!.POSTED!not-for-mail From: Thiago Macieira Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: String interpolation Date: Fri, 09 Feb 2018 00:05:44 -0800 Lines: 31 Approved: news@gmane.org Message-ID: <1755463.eZGoRBFS42@tjmaciei-mobl1> References: <356d5835-f1bf-4699-94f5-0b2d3d0b9c0e@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" X-Trace: blaine.gmane.org 1518163439 27355 195.159.176.226 (9 Feb 2018 08:03:59 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 9 Feb 2018 08:03:59 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCB4TK757YBRBWVM6XJQKGQECABIQVI@isocpp.org Fri Feb 09 09:03:54 2018 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-qk0-f199.google.com ([209.85.220.199]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ek3eo-00063C-6y for gclcip-std-proposals@m.gmane.org; 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[2001:19f0:5:2221::1:3]) by mx.google.com with ESMTPS id l9si1930474qkj.44.2018.02.09.00.05.46 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 09 Feb 2018 00:05:46 -0800 (PST) Received-SPF: pass (google.com: domain of thiago@macieira.org designates 2001:19f0:5:2221::1:3 as permitted sender) client-ip=2001:19f0:5:2221::1:3; Original-Received: from tjmaciei-mobl1.localnet (unknown [IPv6:2601:1c0:4501:5f9f:1898:5a56:9160:57ba]) by smtp.macieira.info (Postfix) with ESMTPSA id 6A25D7EF9 for ; Fri, 9 Feb 2018 00:05:45 -0800 (PST) In-Reply-To: X-Original-Sender: thiago@macieira.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of thiago@macieira.org designates 2001:19f0:5:2221::1:3 as permitted sender) smtp.mailfrom=thiago@macieira.org 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:36820 Archived-At: On Thursday, 8 February 2018 23:50:33 PST Nicol Bolas wrote: > Show me another C++ language feature that is fundamentally rooted in doing > things the slow way. Other than exceptions. Or things related to virtual > functions/dynamic_casting of multiple inheritance. I should point out that neither exceptions nor dynamic casting are slow when used properly. Exceptions, when used only in exceptional cases, do not affect the performance of the main program and, in many benchmarks, show that they actually improve performance. They're only slow when thrown. Part of the reason for that is also the dynamic casting. There aren't many ways of skinning this particular cat, not without removing the multiple inheritance feature from the language. It just is what it is. But most applications and frameworks don't abuse the feature too badly, so the feature isn't slow for them. And here's an example of a framework that does abuse virtuals and multiple inheritance: iostreams. -- Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org Software Architect - Intel Open Source Technology Center -- 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/isocpp.org/d/msgid/std-proposals/1755463.eZGoRBFS42%40tjmaciei-mobl1. .