From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 115725 invoked by alias); 13 Oct 2016 14:56:39 -0000 Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org Received: (qmail 115715 invoked by uid 89); 13 Oct 2016 14:56:39 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.4 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE,RCVD_IN_SORBS_SPAM,SPF_PASS autolearn=no version=3.3.2 spammy=H*RU:67.222.38.55, H*RU:sk:gproxy5, HX-HELO:sk:gproxy5, Hx-spam-relays-external:sk:gproxy5 X-HELO: gproxy5-pub.mail.unifiedlayer.com Received: from gproxy5-pub.mail.unifiedlayer.com (HELO gproxy5-pub.mail.unifiedlayer.com) (67.222.38.55) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with SMTP; Thu, 13 Oct 2016 14:56:29 +0000 Received: (qmail 4191 invoked by uid 0); 13 Oct 2016 14:56:27 -0000 Received: from unknown (HELO cmgw3) (10.0.90.84) by gproxy5.mail.unifiedlayer.com with SMTP; 13 Oct 2016 14:56:27 -0000 Received: from box522.bluehost.com ([74.220.219.122]) by cmgw3 with id v2wP1t0102f2jeq012wSzE; Thu, 13 Oct 2016 08:56:27 -0600 X-Authority-Analysis: v=2.1 cv=KLfJUj1o c=1 sm=1 tr=0 a=GsOEXm/OWkKvwdLVJsfwcA==:117 a=GsOEXm/OWkKvwdLVJsfwcA==:17 a=L9H7d07YOLsA:10 a=9cW_t1CCXrUA:10 a=s5jvgZ67dGcA:10 a=CH0kA5CcgfcA:10 a=2QSLavsyAAAA:8 a=e2hQ2p87lF7xk9hmvB4A:9 a=c2I7507bDiIA:10 a=9H_80fVQ3bbXSWzY4Kdq:22 Received: from 174-16-143-211.hlrn.qwest.net ([174.16.143.211]:39298 helo=pokyo) by box522.bluehost.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.86_1) (envelope-from ) id 1buhQl-0000SL-PM; Thu, 13 Oct 2016 08:56:23 -0600 From: Tom Tromey To: Simon Marchi Cc: Tom Tromey , gdb-patches@sourceware.org Subject: Re: [RFA 03/22] Use scoped_restore for ui_file References: <1474949330-4307-1-git-send-email-tom@tromey.com> <1474949330-4307-4-git-send-email-tom@tromey.com> <7417a71f254c7f42026408c5e143b374@simark.ca> <87bmz4fxtt.fsf@tromey.com> <1bbab702396db2da51e21ad0b6f1937a@simark.ca> Date: Thu, 13 Oct 2016 14:56:00 -0000 In-Reply-To: <1bbab702396db2da51e21ad0b6f1937a@simark.ca> (Simon Marchi's message of "Sat, 01 Oct 2016 07:47:13 -0400") Message-ID: <87k2dcxppl.fsf@tromey.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-BWhitelist: no X-Exim-ID: 1buhQl-0000SL-PM X-Source-Sender: 174-16-143-211.hlrn.qwest.net (pokyo) [174.16.143.211]:39298 X-Source-Auth: tom+tromey.com X-Email-Count: 4 X-Source-Cap: ZWx5bnJvYmk7ZWx5bnJvYmk7Ym94NTIyLmJsdWVob3N0LmNvbQ== X-SW-Source: 2016-10/txt/msg00372.txt.bz2 >>>>> "Simon" == Simon Marchi writes: >> FWIW Mozilla uses an Option class for this kind of thing. >> It works like: If you happened to search Firefox looking for this, it's called Maybe, not Option -- Option is the Rust name for this. Also I thought it was worth pointing out that this has made it into C++17 under the name std::optional: http://en.cppreference.com/w/cpp/utility/optional Tom