220 28299 <1dce887f-b468-4978-9466-a9630cfc2671@isocpp.org> article Path: news.gmane.org!.POSTED!not-for-mail From: mihailnajdenov@gmail.com Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Proposal - non allocating std::function Date: Tue, 20 Sep 2016 11:33:21 -0700 (PDT) Lines: 67 Approved: news@gmane.org Message-ID: <1dce887f-b468-4978-9466-a9630cfc2671@isocpp.org> References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_21_1431069579.1474396401357" X-Trace: blaine.gmane.org 1474396421 18000 195.159.176.226 (20 Sep 2016 18:33:41 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 20 Sep 2016 18:33:41 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBCUJ3A7GRAPRB4UBQ27QKGQEBLAOJZI@isocpp.org Tue Sep 20 20:33:37 2016 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 1bmPrD-0003Jd-1q for gclcip-std-proposals@m.gmane.org; Tue, 20 Sep 2016 20:33:27 +0200 Original-Received: by mail-pf0-f197.google.com with SMTP id v67sf51860407pfv.1 for ; Tue, 20 Sep 2016 11:33:29 -0700 (PDT) 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=Zrc6naZA8WbVxzXlp1eNoUkaNK4dySWBxYgMna5uzmM=; b=wOxmymIWbALbcH3ngRYLxWisAWGTEyWTzzFHhixTxNOf8xr9tz1T78Gorzio65xWoI /PrNJr07Ozgx3j99QXCIIbAnE8oYgj1U68Wpo28XWGCn1bki2sGc2PpGlpyTqx+FAWnf nLdSJUZd/b6kOXsG92nH554TiSkwyPkjPmC+Oaoz0C78izLDMfmXav7I0jgPVHXEQmp4 R35VP+/WtJFRo0E6Pf3cxu3quRhsY30/IMG6hnO4eMTWx3atnlcPnHqBSDzEpOwxItGW 5xDqcWpFn7rZXphh40p1S3e+0JC3QJs2BKtTuCLZ5D1/wttQfL9Xp9nYbVriI44R9Zpy pFiA== 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 :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=Zrc6naZA8WbVxzXlp1eNoUkaNK4dySWBxYgMna5uzmM=; b=Ka7busyybvDt7HnbwB40a9isTZAzGH1e3sOiMC52Y+lq9avtIIbQGV1k9df55eukXY z2JdDV02SKnq1ZBZMKy3DWhY5He2zFeojxpCT9qg9R/nz1djHllyuDwSD4rINYRFYHlP ziQbVtyuxXJw6NlZtMSsMOauuYbZFie+x4d3XQ9eCPgltn86LMrkEPRAsuS9Jy/KTxa8 NFHe3mYbHFwzLZOlQlgFMvpu+VnWTgCJQT4PY9N0tvKCryeYKeDjNvPxXGYizpbIkypH 1Kz+9IydPZp2vMqA3vH0XKJBWqc4qhHJ+TEEuab/GaW+rjch/9bPQI83KYvyh1cGD2I/ qFhg== 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: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=Zrc6naZA8WbVxzXlp1eNoUkaNK4dySWBxYgMna5uzmM=; b=a/ZpuDwPpOaQfwWjufzBRVTj33f2XBo49Czyf8Fim8utK/da8e5CZ4mOGyFyCqoU8v fHcvq26UJQvPdq6BLDLJDR9rYpmtJE/DpofM6pUpNZF1+ft8X2ieJEu7QNIvioMD3gdV 7U/EAcgrgNi1XJKjmRPClIIxMD8Wlhr1jAHn25e/EOTh2lI4/C4y8OTaP1QD8DzzQONG KYsYtJsvUcQmemNXYMJKUN+Yuv7AVblbPn5vKKW0zesF9seBgxIo0US3kZ2K0Jm5tQLO Cz9gfHVjBelEHZRHqkNbPoxJseamSoCb/ZJaiRzPI+vZaJzhziAaLcg4r0N8wLHv118c /vFw== X-Gm-Message-State: AE9vXwNipsmhE3KyIQtv7HmJvfc96Rwg0Uv+1tYoy7Gxzf6nVYKx9+APazJ8rVttcw7Yyg== X-Received: by 10.66.85.104 with SMTP id g8mr17063114paz.33.1474396408351; Tue, 20 Sep 2016 11:33:28 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.107.165.141 with SMTP id o135ls4658413ioe.29.gmail; Tue, 20 Sep 2016 11:33:22 -0700 (PDT) X-Received: by 10.36.107.194 with SMTP id v185mr303411itc.10.1474396402442; Tue, 20 Sep 2016 11:33:22 -0700 (PDT) In-Reply-To: X-Original-Sender: MihailNajdenov@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:28299 Archived-At: ------=_Part_21_1431069579.1474396401357 Content-Type: multipart/alternative; boundary="----=_Part_22_345748464.1474396401358" ------=_Part_22_345748464.1474396401358 Content-Type: text/plain; charset=UTF-8 I am all for non-allocating function objects - vast majorities of my lambdas are small enough to be "stack-only", but bigger then the std::function SOO threshold! *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). -- 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/1dce887f-b468-4978-9466-a9630cfc2671%40isocpp.org. ------=_Part_22_345748464.1474396401358 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
I am all for non-allocating function objects - vast majori= ties of my lambdas are small enough to be "stack-only", but bigge= r then the std::function SOO threshold!

But isn't= it time to think for first-class 'callable' type?=C2=A0
<= div>
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 1= 0+ 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 - we either have to use templ= ates (not clean, though Concepts will improve that) or use std::function an= d not be as efficient (and still not all that clean).
=C2=A0


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