220 30905 <09970ac7-82aa-46cb-91a3-38b55dea503e@isocpp.org> article Path: news.gmane.org!.POSTED!not-for-mail From: Nicol Bolas Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Try-Catch function Date: Wed, 15 Feb 2017 07:16:56 -0800 (PST) Lines: 70 Approved: news@gmane.org Message-ID: <09970ac7-82aa-46cb-91a3-38b55dea503e@isocpp.org> References: <76d9ab0e-4a74-401d-85ad-327f912a1bb7@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_1940_94205367.1487171816524" X-Trace: blaine.gmane.org 1487171820 32384 195.159.176.226 (15 Feb 2017 15:17:00 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 15 Feb 2017 15:17:00 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBCEKFTV6ZUMBB2PBSHCQKGQESVHMZIQ@isocpp.org Wed Feb 15 16:16:52 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 1ce1K8-0007jW-77 for gclcip-std-proposals@m.gmane.org; Wed, 15 Feb 2017 16:16:52 +0100 Original-Received: by mail-pf0-f197.google.com with SMTP id c73sf184580493pfb.7 for ; Wed, 15 Feb 2017 07:16:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=pZf6XQ/nK0D24z4sqR6y2NVH6W+OCzXNHJtGs1AVM1Q=; b=mK7J9mNkPeLwg+dbcmqYu7+GvRdpNhxT624aLcytT3sZqzzioYPu/yNNDoAuV8Y462 YuJa9GmbGM4D6blh26BGltUm8v/An7HFPscAQlLocywrVhHGLLKCTrzcE6eLK7cPSQB7 8HwiVhj5BhxpsLal/bIogaS4H7oyKebgCOJuW4oCmNhXpdmQmQZdbG6xfakaQHryNTRB HXiaus/25AH23vgUyxn+swg1s8QYObcDmPmLRinfGWAFW6so+2TzpfVqwzpVzjbAckan X5MXTU16j+VdFidNG/WKQMI98jYFaAl8vwPzjyR5qN1JttQL1FP+ZaSZ0NgRmCHswFMs wdKg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=pZf6XQ/nK0D24z4sqR6y2NVH6W+OCzXNHJtGs1AVM1Q=; b=pSReNUgqiwRP8R0m8+Wyr8NoJWs1mAvmGsKFbXjGjPr5aH5c3Uqp+om8s4EK8o4cdi /GYpOqDhI0hS+EK2tStcf+Snl/jIKEK2X0pvP6n4x/NqIQZNYairjkTx2ELMVpMxozfb o3NmP5HlOJhL9EE2z1zOveqOkqcQZZnyouUpNePkbnmJDPfBoIOivXAaEBOpb9NQO4XD a8/M7lPt68KFb73JfMv+7WKHMZlbeHSkaKMPgtwxvi6iW3opVGHXXonXcR2/PSlzVmIH 6I5QIZ1bZhwbt4bVniReGxyWCe+PnEYj34l83pI15za1pEgJ6rd/mqon52S9WZDi+fCo GCJQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:message-id:in-reply-to:references :subject:mime-version:x-original-sender:reply-to:precedence :mailing-list:list-id:x-spam-checked-in-group:list-post:list-help :list-archive:list-subscribe:list-unsubscribe; bh=pZf6XQ/nK0D24z4sqR6y2NVH6W+OCzXNHJtGs1AVM1Q=; b=BRYdPe2lXa6fQfpqUFVVIdkIX3Xrnjcc8fKRTYxU7ojthdo5JZMN0h7CNZEh32OhGS VtnxWeH3nRWT6maM1Ovcpgz0ssrPy1olNAMgf+Lxc4ZDpZQhlCzPS20CnQdXkJiGJFCm sKnnVB277q1B44r0R5zPn7wPus0OLIaRwN7Wzyzm94GIouE+fD8Ef+bpFtVqwSBZdTBF 4SItjRaxA4TpKKHE1bvWKZOl9pXN3p0Nk//3Gt+5CZsdLTCVPSf/1YzeX89uivSKoWGR barGMMLk+4k9VyTI7xIFlojd/f/LPlEXCLRI+3JDCVVI4h/w4UhytP/+1ytzy08RsrqB alCw== X-Gm-Message-State: AMke39kvw1WMaOEag/KuWT+Y1GBift9VB5uxdCUce4nsWBSB5yEd3B29b9JpebI79axfXw== X-Received: by 10.99.143.26 with SMTP id n26mr828112pgd.80.1487171817887; Wed, 15 Feb 2017 07:16:57 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.157.13.120 with SMTP id 111ls279806oti.43.gmail; Wed, 15 Feb 2017 07:16:57 -0800 (PST) X-Received: by 10.157.8.10 with SMTP id 10mr2572536oty.19.1487171817117; Wed, 15 Feb 2017 07:16:57 -0800 (PST) In-Reply-To: X-Original-Sender: jmckesson@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:30905 Archived-At: ------=_Part_1940_94205367.1487171816524 Content-Type: multipart/alternative; boundary="----=_Part_1941_1920346281.1487171816524" ------=_Part_1941_1920346281.1487171816524 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Wednesday, February 15, 2017 at 3:59:15 AM UTC-5, Micha=C5=82 Dominiak w= rote: > > As far as I understand, this already exists in the language (and=20 > coincidentally is the only way to capture exceptions thrown in a ctor ini= t=20 > list). > Not quite. If you use function-level try blocks, the catch blocks are not= =20 considered part of the function itself. So they cannot `return`; they can= =20 only `throw`. For some reason, the OP wants to be able to return from them.= =20 Even though they are declare outside of the function. --=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/09970ac7-82aa-46cb-91a3-38b55dea503e%40isocpp.or= g. ------=_Part_1941_1920346281.1487171816524 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
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 c= oincidentally is the only way to capture exceptions thrown in a ctor init l= ist).

Not quite. If you use function-level try b= locks, 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 them. Even though they are declare outside of the= function.

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