220 26565 article Path: news.gmane.org!not-for-mail From: Jonathan Coe Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: auto type deduction for *_cast return argument Date: Tue, 5 Jul 2016 17:12:02 +0100 Lines: 30 Approved: news@gmane.org Message-ID: References: <58140e46-2adc-4eac-8f51-72d3685cdf0b@isocpp.org> <7E3409C2-A2AC-4562-BB06-6D5D5ACE8AC8@gmail.com> <00caca39-d36a-475c-840f-79759e99265d@isocpp.org> <4ac3803f-a87d-4551-947f-43f106bdda20@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 (1.0) Content-Type: text/plain; charset=UTF-8 X-Trace: ger.gmane.org 1467735143 3430 80.91.229.3 (5 Jul 2016 16:12:23 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 5 Jul 2016 16:12:23 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC2JVFPBRAHBBVNY565QKGQEMR75KDI@isocpp.org Tue Jul 05 18:12:12 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wm0-f70.google.com ([74.125.82.70]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1bKSxC-0000js-U3 for gclcip-std-proposals@m.gmane.org; Tue, 05 Jul 2016 18:12:06 +0200 Original-Received: by mail-wm0-f70.google.com with SMTP id a66sf92405040wme.1 for ; Tue, 05 Jul 2016 09:12:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=from:mime-version:subject:message-id:date:references:in-reply-to:to :x-original-sender:x-original-authentication-results:reply-to :precedence:mailing-list:list-id:x-spam-checked-in-group:list-post :list-help:list-archive:list-subscribe:list-unsubscribe; bh=+uB45bNkFenca4sSrMLca5iOvFLY0dEAvOXR4eLRT3g=; b=ggYlhcwRzW6RcEvh0uCc9oInF5lvFIxlFuzRgskFohCgZ+diIiiONZ0m72wRVyqdbu FVsIxPGiKP8VYVjUTzf3bQVWIxR88cEyyTkJD6hi6Qza6KBans/KgzQqOPfsdpS1XkT+ UpDG7WOyOkIvq2bZNYjNs7KFluQPOcabqI//iBOJE7oaIeT4EQ52hbPXs7SlD1jieaC+ tm00ZaGDb7UVxK+F71IwjIJUUF/z6lxa/tDMg/lwdOlgZ4hR7HSKE1wrLYboLfDFsKTx o8Rmzx/0VrBxaiLkYRXvcfYc6qF+aEeI1tWOd7bkxbs6Q6+vHkwaOBsv30nMiOiZD4M+ 65qw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:mime-version:subject:message-id:date :references:in-reply-to:to:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=+uB45bNkFenca4sSrMLca5iOvFLY0dEAvOXR4eLRT3g=; b=FsFLgxHeKwKYlJD1f7BXk0ZP/j/e2mLbUZhORwRpc/JPlYwdXghka+vQ4kG2tdoOyr r5xxQE0GHd+7QaVblxO9BuqiGDNUXmLZ4qXnuXSb+fCya6E8NnMK+AFCYCC2oaIoXbUj e+mknCVIJRZoKeUCbKWoVmXWyxHYl3dA2JxtPtyhaNtk0rYnePLb1svb8q0NUiTv4SSx 8KEyFZqoznU71FTWlTrUC3g85YgW1S9UZTrrYt0pjj6aWCXvov+wyVcpis2CfBlZKJyS k34aiRgEsALi2C793csQNRSjWNWV9vmkygJ9e8lXe+vCSNQPS++tbekt608G+TMO58JL JDuw== X-Gm-Message-State: ALyK8tIOAgn9g2GzVYF4ljft7FWbgT3qqXl5854f7KD3R/43cVjXn4UUNQtEv/QDg/Wb8A== X-Received: by 10.194.76.8 with SMTP id g8mr3704710wjw.2.1467735126395; Tue, 05 Jul 2016 09:12:06 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.28.169.77 with SMTP id s74ls635296wme.28.canary; Tue, 05 Jul 2016 09:12:05 -0700 (PDT) X-Received: by 10.28.154.214 with SMTP id c205mr17396506wme.9.1467735125259; Tue, 05 Jul 2016 09:12:05 -0700 (PDT) Original-Received: from mail-wm0-x22a.google.com (mail-wm0-x22a.google.com. [2a00:1450:400c:c09::22a]) by mx.google.com with ESMTPS id 85si4219808wmb.30.2016.07.05.09.12.05 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 05 Jul 2016 09:12:05 -0700 (PDT) Received-SPF: pass (google.com: domain of jonathanbcoe@gmail.com designates 2a00:1450:400c:c09::22a as permitted sender) client-ip=2a00:1450:400c:c09::22a; Original-Received: by mail-wm0-x22a.google.com with SMTP id f126so143553473wma.1 for ; Tue, 05 Jul 2016 09:12:05 -0700 (PDT) X-Received: by 10.194.52.1 with SMTP id p1mr15906197wjo.27.1467735124808; Tue, 05 Jul 2016 09:12:04 -0700 (PDT) Original-Received: from [10.193.174.111] (genkt-057-143.t-mobile.co.uk. [149.254.57.143]) by smtp.gmail.com with ESMTPSA id t188sm3743016wma.8.2016.07.05.09.12.03 for (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 05 Jul 2016 09:12:03 -0700 (PDT) In-Reply-To: X-Mailer: iPhone Mail (13F69) X-Original-Sender: jonathanbcoe@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com; spf=pass (google.com: domain of jonathanbcoe@gmail.com designates 2a00:1450:400c:c09::22a as permitted sender) smtp.mailfrom=jonathanbcoe@gmail.com; dmarc=pass (p=NONE dis=NONE) header.from=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:26565 Archived-At: > On 5 Jul 2016, at 16:57, Jim Porter wrote: > >> On 7/5/2016 10:07 AM, Nicol Bolas wrote: >> Indeed, this is a good reason to /not/ make such casts easier to type. >> If you're using casts so frequently that you need a language change to >> avoid lots of repetition, then I'd say that your code is doing something >> wrong. > > Agreed. I seem to recall a (possibly apocryphal) explanation that the C++ cast functions were verbose *because* they should be avoided unless absolutely necessary; the verbosity thus serves as a warning to the developer to rethink things. > static_cast is an occasional exception to this rule as it can trigger user-defined conversions. Always seems a bit awkward to me. > - Jim > > > -- > 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/nlgled%24jdo%241%40ger.gmane.org. -- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. 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