220 26299 article Path: news.gmane.org!not-for-mail From: Gor Nishanov Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: RFC: await, structured binding and std::expected Date: Sun, 12 Jun 2016 10:22:32 -0700 Lines: 85 Approved: news@gmane.org Message-ID: References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1465752162 28411 80.91.229.3 (12 Jun 2016 17:22:42 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 12 Jun 2016 17:22:42 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC47RF4IW4GRBWNU625AKGQEFIBYLPA@isocpp.org Sun Jun 12 19:22:37 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-yw0-f200.google.com ([209.85.161.200]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1bC95n-0002v1-4Y for gclcip-std-proposals@m.gmane.org; Sun, 12 Jun 2016 19:22:35 +0200 Original-Received: by mail-yw0-f200.google.com with SMTP id c72sf268539280ywb.1 for ; Sun, 12 Jun 2016 10:22:34 -0700 (PDT) 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=KhJRdMmLWd1Hu50atvzzWnOBL0Z8MwebQZnOvNY+56k=; b=tB3oX2+T/UVFMMHywaBtS3fP0NfQlHT/3S4eL5wr/5xdIVyF4lYmfcz4wpiwdMOJiM 24zYX4nG3Y0PZb8lF+ml4HdSsXQnKDxhlWrWtpBWUZpK4uk15DgT5108P0E0LVGaZMrH Tb3afYxU27gk4xNukDsMr/SlyGDubObYvCDvWpjB0MNOsEKlkc5g60OdjMKViBsTCZBg KzvEe68xqgE4EgeUX1LS9QjOW9/InZHOJpbX347qDRcRpdUlIVehIvTc0JEvArHs3e4a zWFQ7GdDM5We1pPH7n1xzhwHtV8O0u2SbGK9B86L3Mr95QAqbDdZWmFDKZncBJEeGez6 gzzA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; 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=KhJRdMmLWd1Hu50atvzzWnOBL0Z8MwebQZnOvNY+56k=; b=Nvhs/yVNinfz/bTmscRGZHDv/1XyEuOJwdo+fXdSm7MvfLaA/2+Vs4fyYCIv/wzp3C ejBQfUX7JpgVfmKs3lJUrDPUAVdx2J7k6a9iuAr6Z1HIL5nMZ3/Wsk4zur5u0q0rQ7S0 wx2vhH7oBaN99gFjJJXaIGPosVnMBfV8kMhYnhGMcLgotmZn4mfr9N5POPdExl7ZSmuO RZvINVjmJq7gECTt9KoIu0ymjqjlYZ4nlSm5DP602NG4UHWn/677xn8qjN16usldg0du u83xo13fhf5LuctvzWXQY2WcPEL3+sweXL+IQu+W1heuJGlV6uliE4Vw7f7GNS0hdh+K pzl X-Gm-Message-State: ALyK8tJb751EhkWM/lS5BMJa/XWy95pJsTOEfaDVpXn+8RpE59CT1oTbcdvr48kwXhqnAw== X-Received: by 10.129.102.87 with SMTP id a84mr9150872ywc.15.1465752154129; Sun, 12 Jun 2016 10:22:34 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.107.29.76 with SMTP id d73ls1355867iod.0.gmail; Sun, 12 Jun 2016 10:22:32 -0700 (PDT) X-Received: by 10.107.59.78 with SMTP id i75mr16808012ioa.125.1465752152912; Sun, 12 Jun 2016 10:22:32 -0700 (PDT) Original-Received: from mail-io0-x234.google.com (mail-io0-x234.google.com. [2607:f8b0:4001:c06::234]) by mx.google.com with ESMTPS id b126si8537700itc.73.2016.06.12.10.22.32 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 12 Jun 2016 10:22:32 -0700 (PDT) Received-SPF: pass (google.com: domain of gornishanov@gmail.com designates 2607:f8b0:4001:c06::234 as permitted sender) client-ip=2607:f8b0:4001:c06::234; Original-Received: by mail-io0-x234.google.com with SMTP id o127so57062243iod.2 for ; Sun, 12 Jun 2016 10:22:32 -0700 (PDT) X-Received: by 10.107.21.194 with SMTP id 185mr16592254iov.59.1465752152690; Sun, 12 Jun 2016 10:22:32 -0700 (PDT) Original-Received: by 10.107.26.70 with HTTP; Sun, 12 Jun 2016 10:22:32 -0700 (PDT) In-Reply-To: X-Original-Sender: GorNishanov@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com; spf=pass (google.com: domain of gornishanov@gmail.com designates 2607:f8b0:4001:c06::234 as permitted sender) smtp.mailfrom=gornishanov@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:26299 Archived-At: I did not spend any time thinking about it. Probably it would be better to have something other than awaitable with a simpler semantics. try_xxx equivalent of await_xxx. It is possible that someone can come up with a cool generalization of the "syntactic sugar" that coroutines do that is not tied to coroutines (as in functions that can suspend their execution and return control back to the caller to be resumed or destroyed at a later point as desired). If that works out, that would be great. On Sun, Jun 12, 2016 at 9:20 AM, Vicente J. Botet Escriba wrote: > Le 11/06/2016 =C3=A0 19:01, Gor Nishanov a =C3=A9crit : > > > > On Sunday, May 29, 2016 at 3:01:09 AM UTC-7, Vicente J. Botet Escriba wro= te: >> >> Hi, >> >> >> Using structured binding like syntax to mean await when we don't want to >> await >> >> For a lot of people it troubling to use await with std::expected [P0323R= 0] >> as we don't await anything >> >> > > Just to comment on this point. One suggestion to improve readability of t= hat > use of away was to repurpose 'try' :-) . > So that you code looks: > > int i =3D try foo(bla); // try will unpack expected and propagate= the > error if required. Compile time error if used with future-like awaitables= .. > > Beside disabling futures-like awaitable types, What would be the differen= ce > between try and await? > > int [i] =3D foo(bla) > > vs > > int i =3D try foo(bla); > > I would go with the latter. > > Yes, I find the try expression more appropriated. > > Vicente > > -- > You received this message because you are subscribed to a topic in the > Google Groups "ISO C++ Standard - Future Proposals" group. > To unsubscribe from this topic, visit > https://groups.google.com/a/isocpp.org/d/topic/std-proposals/NkykzTGqH7Q/= unsubscribe. > To unsubscribe from this group and all its topics, 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/cc7864ac-836= 5-3d26-1f61-57ddc294ed5e%40wanadoo.fr. --=20 You received this message because you are subscribed to the Google Groups "= ISO C++ Standard - Future Proposals" group. 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