220 30459 <58750288.5080004@gmail.com> article Path: news.gmane.org!.POSTED!not-for-mail From: Matthew Woehlke Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: enum_cast proposal Date: Tue, 10 Jan 2017 10:49:28 -0500 Lines: 19 Approved: news@gmane.org Message-ID: <58750288.5080004@gmail.com> References: <57258435-5d82-48e7-8ed7-3c38682418fb@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 1484063396 17654 195.159.176.226 (10 Jan 2017 15:49:56 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 10 Jan 2017 15:49:56 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0 Cc: m.cencora@gmail.com, gmisocpp@gmail.com To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC37LBFWUIFBBDEF2TBQKGQEQIYHWFI@isocpp.org Tue Jan 10 16:49:52 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-pf0-f197.google.com ([209.85.192.197]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cQyfx-00024p-CV for gclcip-std-proposals@m.gmane.org; Tue, 10 Jan 2017 16:49:29 +0100 Original-Received: by mail-pf0-f197.google.com with SMTP id f144sf205350724pfa.3 for ; Tue, 10 Jan 2017 07:49:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=subject:to:references:cc:newsgroups:from:message-id:date:user-agent :mime-version:in-reply-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=616OSEumCVPojLzYbx5AN5wDllhZKhLQAMOHlWqsHHA=; b=A0yDULjaDGZLlVKoH+e75t9WVUwLq2bsbNfkQ2Eqku87B+fYx4NpxvKp92w7d7A6Ft 1Ih9nO6vFIi4v/UP5zB81YAkz4nWw7fRD+3WcCUJvu7m+L8ZHGSyqP6zP+7UvTwWd7IA aLy8TewEoyqVMCjOhpxqT1cFRl0J71fL7uvXmKMwFYoCMCgQ5qzdzQc6/hJtiHjlXLaW jin3no2Bm7oEAIRpm3mdQA2lTZWtYhqDS0/R8YFQtYTY2PYRxr1QHGAEVKtVxljrkyWz dTOfn6A9TorIUyks2TyFcYDZzmJ0adrSRTKEn59avwWTM5onttZuTWpgItXY7imOKKIZ jPPQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:cc:newsgroups:from :message-id:date:user-agent:mime-version:in-reply-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=616OSEumCVPojLzYbx5AN5wDllhZKhLQAMOHlWqsHHA=; b=R2AYqF4fwjuvwGquYPmr4/l29hwl30UUAiykGpEZje0JNu0wwF8z2dxqtI3itxAmut TrI8g1ffgeAmCTgn2d5ktkgLbNLbcqJhnvoCTa/RV8YY8tGx343bdDbZqqJuNWACsWz0 9c9W0GszeuKODcEP7MUDPD982pO+jz5q8YtpY6iJXxWk2L+DCgRPQI562zP8Ng344oFF 4MWC5vs2W30fjYzIQmVK3fwo+5iiDpz+gmdkWPyrM1znHhCoKOB8Q8VzWW6flPdOJ4Fr nn71EgtyGWvos2i3glfmmpiWEc1A3/ylXBuuB956E8tP9YcnTvOFpYgVRWkB5dq1d4me 3Hpg X-Gm-Message-State: AIkVDXIHloSWKL/o4UN4LPECqL9yIzFu3Pn0DwYmWC5EEs4Bp24NyaylU//MGsVv7nKndQ== X-Received: by 10.99.170.6 with SMTP id e6mr1162086pgf.7.1484063373687; Tue, 10 Jan 2017 07:49:33 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.36.120.146 with SMTP id p140ls570601itc.14.gmail; Tue, 10 Jan 2017 07:49:32 -0800 (PST) X-Received: by 10.36.28.204 with SMTP id c195mr563040itc.81.1484063372504; Tue, 10 Jan 2017 07:49:32 -0800 (PST) Original-Received: from mail-it0-x22c.google.com (mail-it0-x22c.google.com. [2607:f8b0:4001:c0b::22c]) by mx.google.com with ESMTPS id b82si2313836ioa.50.2017.01.10.07.49.32 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 10 Jan 2017 07:49:32 -0800 (PST) Received-SPF: pass (google.com: domain of mwoehlke.floss@gmail.com designates 2607:f8b0:4001:c0b::22c as permitted sender) client-ip=2607:f8b0:4001:c0b::22c; Original-Received: by mail-it0-x22c.google.com with SMTP id r185so50877888ita.0 for ; Tue, 10 Jan 2017 07:49:32 -0800 (PST) X-Received: by 10.36.67.199 with SMTP id s190mr596737itb.41.1484063372292; Tue, 10 Jan 2017 07:49:32 -0800 (PST) Original-Received: from [192.168.1.173] (tripoint.kitware.com. [66.194.253.20]) by smtp.googlemail.com with ESMTPSA id o191sm1452494iod.11.2017.01.10.07.49.31 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 10 Jan 2017 07:49:31 -0800 (PST) Original-Newsgroups: gmane.comp.lang.c++.isocpp.proposals In-Reply-To: X-Original-Sender: mwoehlke.floss@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com; spf=pass (google.com: domain of mwoehlke.floss@gmail.com designates 2607:f8b0:4001:c0b::22c as permitted sender) smtp.mailfrom=mwoehlke.floss@gmail.com; dmarc=pass (p=NONE sp=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-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:30459 Archived-At: On 2017-01-10 10:31, m.cencora@gmail.com wrote: > For sure baseline API must be exception-free. > Do we really want to additionally support API that throws on error? I *really* hope we can use something like std::expected; this is a textbook use case for that, and makes it trivial to have a throw-on-error API (just grab the value from the expected without checking it first; this will turn around and throw if the value is not there). -- Matthew -- 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/58750288.5080004%40gmail.com. .