220 30907 article Path: news.gmane.org!.POSTED!not-for-mail From: =?UTF-8?Q?Daniel_Kr=C3=BCgler?= Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Try-Catch function Date: Wed, 15 Feb 2017 18:37:57 +0100 Lines: 33 Approved: news@gmane.org Message-ID: References: <76d9ab0e-4a74-401d-85ad-327f912a1bb7@isocpp.org> <09970ac7-82aa-46cb-91a3-38b55dea503e@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 Content-Transfer-Encoding: quoted-printable X-Trace: blaine.gmane.org 1487180280 27388 195.159.176.226 (15 Feb 2017 17:38:00 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 15 Feb 2017 17:38:00 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCT7RVFA4QORB5VDSLCQKGQEVJDBNBY@isocpp.org Wed Feb 15 18:37:56 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wm0-f70.google.com ([74.125.82.70]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ce3Wb-0006ex-Gp for gclcip-std-proposals@m.gmane.org; Wed, 15 Feb 2017 18:37:53 +0100 Original-Received: by mail-wm0-f70.google.com with SMTP id r141sf16554684wmg.4 for ; Wed, 15 Feb 2017 09:37:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-transfer-encoding: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=KoZVRVGB2wkYhi5c2IHbjVN7Vfgw7f7yj0phX/9Ipck=; b=0aBMxw1int1grQRm/yIwcYb70NRG5HvHGJwO6tzytQNL9aVLwRBWGe9QKVdtqm0B+g M5z/JH1HgUgKFZAZoIJHsYb4D1iWinO5LxlS+lX3j23hkjpHMk/hLlY9J7Lj8IGct57X EL9F2HSrgpbhYOIImn26GYxFwZ1Wbk8jabc7mNNKeHtQfjfTFkmH2QW2SPqkb/kLGjmV IhS+C5IKafeyzZip487T9HnSyXtnmCfP0b6JxjReuxVIGabzflQ+u5Mn5WWJqY7CNKmH Dv7I0XqTp1JvUvI++bU+8Ijp+oTX4gWinuocqsP1czQGH9kQlB8hlaxgJoSMHz7GbYWD 6KxA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:content-transfer-encoding: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=KoZVRVGB2wkYhi5c2IHbjVN7Vfgw7f7yj0phX/9Ipck=; b=CUoynVcVWdaiJEdxD7ExS1AcXDrusrLHbOEb7nwgOLMv1m7Ay//dGkOz3evSNzUEH7 afEurqhSaEviELIyoq27Yok8p0LJ42dDlIt0KEWnvD/XKc1HfhjTBTGHKihXsV/Kz+fi 0640bgAENJBavS1wobR7yXDfR9eQnc6mQmYJRI0s/jRLCtJDw0pU+yqyZLEDKH6ncyMJ QtCbuPa/s7LiNErLktsW0vMp6L3wMFqUTBOaGXA9S5d8nZ0b36I6bZQ/eO47/g5kn5fJ 5HPEUg2kdBLA+4G52BLB3c1Jlsp7aq6bAeJviu0bsKjQGW3xm7c1wn1VkwrpFJqPAqGU 4Vq X-Gm-Message-State: AMke39ny2JyxdRaRHhghYo29AJUp3heGthmprcIQ/wXNwlCX4THoGW/i6adVn7bEUCb87A== X-Received: by 10.223.131.2 with SMTP id 2mr2025162wrd.5.1487180279399; Wed, 15 Feb 2017 09:37:59 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.28.34.2 with SMTP id i2ls960401wmi.4.canary-gmail; Wed, 15 Feb 2017 09:37:58 -0800 (PST) X-Received: by 10.28.131.132 with SMTP id f126mr9379965wmd.61.1487180278129; Wed, 15 Feb 2017 09:37:58 -0800 (PST) Original-Received: from mail-wm0-x231.google.com (mail-wm0-x231.google.com. [2a00:1450:400c:c09::231]) by mx.google.com with ESMTPS id 80si5904403wrc.33.2017.02.15.09.37.58 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 15 Feb 2017 09:37:58 -0800 (PST) Received-SPF: pass (google.com: domain of daniel.kruegler@gmail.com designates 2a00:1450:400c:c09::231 as permitted sender) client-ip=2a00:1450:400c:c09::231; Original-Received: by mail-wm0-x231.google.com with SMTP id c85so47945573wmi.1 for ; Wed, 15 Feb 2017 09:37:58 -0800 (PST) X-Received: by 10.28.228.87 with SMTP id b84mr8970445wmh.0.1487180277741; Wed, 15 Feb 2017 09:37:57 -0800 (PST) Original-Received: by 10.28.87.72 with HTTP; Wed, 15 Feb 2017 09:37:57 -0800 (PST) In-Reply-To: <09970ac7-82aa-46cb-91a3-38b55dea503e@isocpp.org> X-Original-Sender: daniel.kruegler@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com; spf=pass (google.com: domain of daniel.kruegler@gmail.com designates 2a00:1450:400c:c09::231 as permitted sender) smtp.mailfrom=daniel.kruegler@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:30907 Archived-At: 2017-02-15 16:16 GMT+01:00 Nicol Bolas : > On Wednesday, February 15, 2017 at 3:59:15 AM UTC-5, Micha=C5=82 Dominiak= wrote: >> >> As far as I understand, this already exists in the language (and >> coincidentally is the only way to capture exceptions thrown in a ctor in= it >> list). > > Not quite. If you use function-level try blocks, the catch blocks are not > considered part of the function itself. So they cannot `return`; they can > only `throw`. For some reason, the OP wants to be able to return from the= m. > Even though they are declare outside of the function. The constraint of function-try-blocks that you describe here, relates to constructors and destructors, not to other functions. The OP's example involved a no such special member function and the syntax used for the exception handling is already valid and allows to return normally. - Daniel --=20 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 e= mail 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/CAGNvRgAUBUgymJD5UAPMhBDzb1tdzJ-9K%2BWaT7JyKwEbT= kgxQg%40mail.gmail.com. .