220 12479 <4C793318-D13F-4558-A678-D15A971E8CF9@gmail.com> article Path: news.gmane.org!not-for-mail From: David Krauss Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Placeholder literals Date: Mon, 25 Aug 2014 13:00:13 +0800 Lines: 75 Approved: news@gmane.org Message-ID: <4C793318-D13F-4558-A678-D15A971E8CF9@gmail.com> References: <570663A9-F617-442F-9B48-5B6E7311AE72@gmail.com> <040716B3-CF41-46C7-AA1C-CB49818FA5EF@gmail.com> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Content-Type: multipart/alternative; boundary="Apple-Mail=_CF49D5BB-CB18-4D2D-9C9F-0156D1895D10" X-Trace: ger.gmane.org 1408942836 26393 80.91.229.3 (25 Aug 2014 05:00:36 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 25 Aug 2014 05:00:36 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCW25A7E3QCRB2EF5OPQKGQEZEP5UHI@isocpp.org Mon Aug 25 07:00:26 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ig0-f200.google.com ([209.85.213.200]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1XLmOI-0006Oj-CL for gclcip-std-proposals@m.gmane.org; Mon, 25 Aug 2014 07:00:26 +0200 Original-Received: by mail-ig0-f200.google.com with SMTP id uq10sf12672744igb.11 for ; Sun, 24 Aug 2014 22:00:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:message-id:mime-version:subject:date :references:to:in-reply-to:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe:content-type; bh=jlax/7Ms69iProskxBS4b8PMo+ZgN7IGfiMZJDsAQRY=; b=i7ryD4Xglejxhl9EQW308d9ihp6Aqz1vaToikwon9O5G43T/TpIR5MhCGNXBf3EhGX HgwYejpcKWRPdHVK9vBY4ab3Ya60Q8doyfighsdxKbW4B5T0/NvteEiIWdbWuz036Z1m Ht+JGjB9kI7OQflokOg/p73lvSG2NKEzHwvpTYfWa78EFI2Wxi55IRVPY2JxtLIUg0lx xNNpWAcTvTDCgNmhAmTz3p3RB3zGFl8A96oVtRKGJ7QikZkFxFHj6pNZGdlmAKfFDJVU 67Sjn6EIHeXsNAGIjFpNJIYBn+fG2Sg16cLEyV5n14Gp9SkTWDCirXHx/P8R74egnzRm MLRA== X-Gm-Message-State: ALoCoQn3BnSmDPQe3NgOGwItJQ1Wl6q+yB5hC0VqLlc4Zh8VVzidcjL6nic27gVNQA70UF7p8BqB X-Received: by 10.182.117.231 with SMTP id kh7mr13159812obb.0.1408942825510; Sun, 24 Aug 2014 22:00:25 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.51.17.97 with SMTP id gd1ls1066568igd.22.canary; Sun, 24 Aug 2014 22:00:24 -0700 (PDT) X-Received: by 10.68.220.105 with SMTP id pv9mr25616034pbc.8.1408942824195; Sun, 24 Aug 2014 22:00:24 -0700 (PDT) Original-Received: from mail-pa0-x22e.google.com (mail-pa0-x22e.google.com [2607:f8b0:400e:c03::22e]) by mx.google.com with ESMTPS id gv10si51384770pbd.90.2014.08.24.22.00.24 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 24 Aug 2014 22:00:24 -0700 (PDT) Received-SPF: pass (google.com: domain of potswa@gmail.com designates 2607:f8b0:400e:c03::22e as permitted sender) client-ip=2607:f8b0:400e:c03::22e; Original-Received: by mail-pa0-f46.google.com with SMTP id lj1so20041076pab.5 for ; Sun, 24 Aug 2014 22:00:24 -0700 (PDT) X-Received: by 10.68.243.70 with SMTP id ww6mr25024603pbc.3.1408942824024; Sun, 24 Aug 2014 22:00:24 -0700 (PDT) Original-Received: from [172.20.10.2] ([121.54.54.129]) by mx.google.com with ESMTPSA id z4sm29727993pdp.69.2014.08.24.22.00.22 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 24 Aug 2014 22:00:23 -0700 (PDT) In-Reply-To: <040716B3-CF41-46C7-AA1C-CB49818FA5EF@gmail.com> X-Mailer: Apple Mail (2.1878.6) X-Original-Sender: potswa@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of potswa@gmail.com designates 2607:f8b0:400e:c03::22e as permitted sender) smtp.mail=potswa@gmail.com; dkim=pass header.i=@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:12479 Archived-At: --Apple-Mail=_CF49D5BB-CB18-4D2D-9C9F-0156D1895D10 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=ISO-8859-1 On 2014-08-25, at 12:50 PM, David Krauss wrote: > The last time I used bind was a while ago, to work around a GCC bug with = non-generic lambdas in pack expansions. Currently my project doesn't build = in GCC; it segfaults and reports an ICE pointing at a generic lambda. So, t= hat's the use case I know :P . .... Well, to be sure, bind can be leveraged in metaprogramming to construct= free-form functions, from a basis function an argument list of mixed value= s and placeholders. Such style is pretty close to pure lambda calculus. Thi= s might be helpful in expression template implementation, but I've not real= ly gotten into that. Also, just to hammer on everyone equally, my project also segfaulted Clang = up until 3.4, whereupon I migrated to it :) . --=20 ---=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. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposa= ls/. --Apple-Mail=_CF49D5BB-CB18-4D2D-9C9F-0156D1895D10 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1
On 2014&= ndash;08–25, at 12:50 PM, David Krauss <potswa@gmail.com> wrote:

The l= ast time I used bind was a while ago, to work= around a GCC bug with non-generic lambdas in pack expansions. Currently my= project doesn’t build in GCC; it segfaults and reports an ICE pointi= ng at a generic lambda. So, that’s the use case I know :P .

… Well, to be sure, bind can be leveraged in metaprogramming to construct free-form = functions, from a basis function an argument list of mixed values and place= holders. Such style is pretty close to pure lambda calculus. This might be = helpful in expression template implementation, but I’ve not really go= tten into that.

Also, just to hammer on everyone e= qually, my project also segfaulted Clang up until 3.4, whereupon I migrated= to it :) .

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