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Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: Proposal - non allocating std::function Date: Tue, 20 Sep 2016 19:37:28 +0100 Lines: 73 Approved: news@gmane.org Message-ID: References: <1dce887f-b468-4978-9466-a9630cfc2671@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=089e013c646a84981c053cf4b8de X-Trace: blaine.gmane.org 1474396655 13762 195.159.176.226 (20 Sep 2016 18:37:35 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 20 Sep 2016 18:37:35 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCWNZ4ECS4GBB2UDQ27QKGQEZOJZNNQ@isocpp.org Tue Sep 20 20:37:31 2016 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 1bmPv7-0002u1-Pz for gclcip-std-proposals@m.gmane.org; Tue, 20 Sep 2016 20:37:29 +0200 Original-Received: by mail-wm0-f70.google.com with SMTP id l132sf4982878wmf.0 for ; Tue, 20 Sep 2016 11:37:31 -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 :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=Ej4BcvN87CWx6ZRvnWXK0TKyEmo6WIOfG3K2PtXW2kU=; b=1zDf1WXzBhymh6ATTqoKKXcpsoB0mEmrvoA8iNfxW6ktY6a0MBaCxDA2MC1QUGYumy VX96Zp+z2rbMxpuWO8TOzjqYJ0irE0QNutzon9Bo0b+VjGP6Iv1tnQub+DNK5LENLt+Y u9oNEuaTehhFrFTD/+5FstqAueXQDBGwwTZ+P1rpJUuSOML+mOjhoJs+OtsWa55EfBTp MeHU9K7/0QmNahVird/TLjsxWPPEqWM00/9Yk+dYzwRiWoIpA2297nqBxR/bN+jI+wHQ +el+6pdlfySFW8Q4X/yfksM6mzlgLbpU4RWdrayGAVzMIhn4Bv1rhCQmsii8BY5gwIBQ Mgkg== 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: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=Ej4BcvN87CWx6ZRvnWXK0TKyEmo6WIOfG3K2PtXW2kU=; b=VGWdFvju2LtLn0kZcWQPGxqzimJspVY738NUCdm04QB5PLeAF7vLDDfQqrUB5I6pso +LGRWefHE85LiNblthUxIMDPpJQ9kyKVr6ldv0RTxX5wjCFV2jRxwtnhociW2AQF1/J8 T9uy10kf1veTjV2p0QdPwKmNKnGOMw6dg5Ci/J/tUi3uBuUtGV4K0VemX70URReQ7CZm X4yBHXSyNiCMOzBNwfxuSMzgWFhdRbvog52D2HneAY+X3v9QwUGBmwKYT8sdDiX5+Mi9 PuXrZSAAeoEzzs45PxWCuAlVzLlgydSNeYqMkl8bZiJA7UD4BYX+TA5+NZYH0bX3VUOJ +Bkw== X-Gm-Message-State: AE9vXwPUQYmA5EzbUcbtPKDO6V7m/rsslO61JjRQg3buzdhYgJyXTeu29kPGBFaRA9vkDQ== X-Received: by 10.28.21.17 with SMTP id 17mr306750wmv.16.1474396651592; Tue, 20 Sep 2016 11:37:31 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.28.66.80 with SMTP id p77ls2500902wma.26.canary; Tue, 20 Sep 2016 11:37:30 -0700 (PDT) X-Received: by 10.28.232.71 with SMTP id f68mr4871341wmh.55.1474396650254; Tue, 20 Sep 2016 11:37:30 -0700 (PDT) Original-Received: from mail-wm0-x230.google.com (mail-wm0-x230.google.com. [2a00:1450:400c:c09::230]) by mx.google.com with ESMTPS id u87si32796673wma.96.2016.09.20.11.37.30 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 20 Sep 2016 11:37:30 -0700 (PDT) Received-SPF: pass (google.com: domain of db0451@gmail.com designates 2a00:1450:400c:c09::230 as permitted sender) client-ip=2a00:1450:400c:c09::230; Original-Received: by mail-wm0-x230.google.com with SMTP id l132so50158045wmf.1 for ; Tue, 20 Sep 2016 11:37:30 -0700 (PDT) X-Received: by 10.194.157.164 with SMTP id wn4mr29330921wjb.142.1474396648934; Tue, 20 Sep 2016 11:37:28 -0700 (PDT) Original-Received: by 10.28.15.84 with HTTP; Tue, 20 Sep 2016 11:37:28 -0700 (PDT) In-Reply-To: <1dce887f-b468-4978-9466-a9630cfc2671@isocpp.org> X-Original-Sender: db0451@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com; spf=pass (google.com: domain of db0451@gmail.com designates 2a00:1450:400c:c09::230 as permitted sender) smtp.mailfrom=db0451@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-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:28300 Archived-At: --089e013c646a84981c053cf4b8de Content-Type: text/plain; charset=UTF-8 On Tue, Sep 20, 2016 at 7:33 PM, wrote: > > *But isn't it time to think for first-class 'callable' type?* > > It is somewhat weird, we have first class, wildly-used, lambdas, but no > native way to store and pass them around - we have to use 10+ years old > container. It's like a new car with second-hand tires. > > And we also have no clean and efficient way to define an interface which > accepts a callable - we either have to use templates (not clean, though > Concepts will improve that) or use std::function and not be as efficient > (and still not all that clean). > > > What's the alternative? How does one support arbitrary callable types, if not by using templates? Which std::function is, just as much. Of course, maybe you have an idea for some other way to do this. Then you're in the right place to propose it. -- 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. To view this discussion on the web visit https://groups.google.com/a/isocpp.org/d/msgid/std-proposals/CACGiwhFos3wukaQxPYDe%3Dw3nfWkdqKgH06_D-cQutc8FaKjXYQ%40mail.gmail.com. --089e013c646a84981c053cf4b8de Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

= On Tue, Sep 20, 2016 at 7:33 PM, <mihailnajdenov@gmail.com>= wrote:

=
But isn't it time to think for first-class 'callable&= #39; type?=C2=A0

It is somewhat weird, we have= first class, wildly-used, lambdas, but no native way to store and pass the= m around - we have to use 10+ years old container. It's like a new car = with second-hand tires.=C2=A0

And we also have no = clean and efficient way to define an interface which accepts a callable - w= e either have to use templates (not clean, though Concepts will improve tha= t) or use std::function and not be as efficient (and still not all that cle= an).
=C2=A0


What&= #39;s the alternative? How does one support arbitrary callable types, if no= t by using templates? Which std::function is, just as much.

Of course, maybe you have an idea for some other way to do this. Then yo= u're in the right place to propose it.

=C2=A0

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