220 21729 article Path: news.gmane.org!not-for-mail From: Gor Nishanov Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: is await an extension of the do-notation? (was Re: Re: Resumable expressions p0114r0 vs async/await P0057R0) Date: Tue, 13 Oct 2015 17:11:57 -0700 (PDT) Lines: 62 Approved: news@gmane.org Message-ID: References: <639f0012-8cb4-4db3-82a6-8d042a3497f9@isocpp.org> <401aa118-ed0b-4c7b-92cf-3fbd706eff9d@isocpp.org> <1d15dbc4-e0c1-4df1-86db-014e11f14d26@isocpp.org> <56114953.4030701@wanadoo.fr> <561B403D.4030403@gmail.com> <561C07D1.3080304@gmail.com> <561C213F.1060009@gmail.com> <561C3875.2050701@gmail.com> <86924069-44d0-447f-bf8a-a42e46579832@isocpp.org> <561D79A7.8080007@gmail.com> <894616d6-9609-4038-b2bc-d2c62df21e0f@isocpp.org> <99bdb3ae-9214-4440-8572-4c47a61eda46@isocpp.org> <78f1c83a-f866-4f64-aba2-939078fdc58b@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_8063_105748413.1444781517886" X-Trace: ger.gmane.org 1444781521 17383 80.91.229.3 (14 Oct 2015 00:12:01 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 14 Oct 2015 00:12:01 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBC47RF4IW4GRBTV362YAKGQEVERLKFI@isocpp.org Wed Oct 14 02:12:00 2015 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-oi0-f71.google.com ([209.85.218.71]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Zm9fk-0004lF-7I for gclcip-std-proposals@m.gmane.org; Wed, 14 Oct 2015 02:12:00 +0200 Original-Received: by oiar126 with SMTP id r126sf52268487oia.2 for ; Tue, 13 Oct 2015 17:11:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :content-type: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=3lSRMV4waIYOC7n2zsKSgrbc4yrRIaM2YUDAbgjWqws=; b=fd9z/Ygy4UKZDQ5iNGTLNfz2j6A6cAIEYw3GytKonGNVFPiQdB+z2JDxsUdImZ/ywj HoBB+2iL98VZX5T6Ci0FWuhT8f4xZILev2WIlAL6+qXBr6Y3sMNxIQOPPDnucO9hR49u sxv+QQWyJcZxkBveO2ZLOSMxCkCOlCfZzF3x8IRJEX7REjURs2Xy8SMVE+E4QTn4+XpD mvh65lkGw15iiYqANSn/ubE5RZaqxUouu8JE0rSwqKaT0/UNBYJZQSUCxK1rLYORMLaT kfv9rv9PwlySEpe+X/0UAE4A03NhzSvLE/XhSulC7biLaqQc9KNZb3Amgso5edQHDWMZ aT1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:message-id:in-reply-to:references :subject:mime-version:content-type: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=3lSRMV4waIYOC7n2zsKSgrbc4yrRIaM2YUDAbgjWqws=; b=KGTkduS9Hw501AD7MPJzrKSIbL2XuwoIOisOAFcyZlLJVuyAwGSrlS+uESDfMgpVUm 8WQFEmvxFWH+t0TizY4OsivsOuJe5NWH9bAXzYNPcqAFMkh/vdGrIZ2QyoUPCPGvUNiG AJxqkNtk6lQ4wvOK5Tn/Wb3rVFNVFf+QCAbVE6WpN5jTMCfP+g74fPgi9sfXBDf7xr34 P09DTv6jyo1d0xai/dzgjc06PSrHyuHbvmlb/bpqYKXJ6CKYHBo4hB14zGjpNyBr12Z7 qCLZvFDZ85lJp477oU+5bxYx2Bj53NBAlffx0LJj4KQ4mz+pAdArropPullrnVHhGxhL 39Zg== X-Gm-Message-State: ALoCoQm9FHeiSZ9cHZ8Ov9SmNPEld9rpoQiTI33ijUX7J7LMiCL4yv55YI6R5+jldidkaX/SY2WX X-Received: by 10.182.98.196 with SMTP id ek4mr186756obb.17.1444781519333; Tue, 13 Oct 2015 17:11:59 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.50.112.2 with SMTP id im2ls1138225igb.40.canary; Tue, 13 Oct 2015 17:11:58 -0700 (PDT) X-Received: by 10.50.30.102 with SMTP id r6mr285696igh.3.1444781518650; Tue, 13 Oct 2015 17:11:58 -0700 (PDT) In-Reply-To: <78f1c83a-f866-4f64-aba2-939078fdc58b@isocpp.org> X-Original-Sender: GorNishanov@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:21729 Archived-At: ------=_Part_8063_105748413.1444781517886 Content-Type: multipart/alternative; boundary="----=_Part_8064_1205241062.1444781517886" ------=_Part_8064_1205241062.1444781517886 Content-Type: text/plain; charset=UTF-8 Okay. Slightly less cryptic reply. Coroutine frame must be stationary once the coroutine starts running. Resumable Expressions abandoned movability/copyability of the lambda* that was present in earlier resumable lambda proposal. Due to the reasons highlighted in the thread I linked earlier. Thus, the resumable expressions is in exactly the same boat as P0057. The difference is that in Resumable Expressions you must do type erasure by hand which is difficult to eliminate. Whereas in P0057 compiler decides whether it needs to do type erasure or not, thus, allowing to optimize it out when unnecessary. -- --- 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. 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Okay. Slightly less cryptic reply. Coroutine frame must be= stationary once the coroutine starts running.
Resumable Expressions ab= andoned movability/copyability of the lambda* that was present in earlier r= esumable lambda proposal. Due to the reasons highlighted in the thread I li= nked earlier. Thus, the resumable expressions is in exactly the same boat a= s P0057.

The difference is that in Resumable Expre= ssions you must do type erasure by hand which is difficult to eliminate.
Whereas in P0057 compiler decides whether it needs to do type erasu= re or not, thus, allowing to optimize it out when unnecessary.


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