220 14115 article Path: news.gmane.org!not-for-mail From: Olaf van der Spek Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: #pragma once Date: Wed, 22 Oct 2014 00:04:26 -0700 (PDT) Lines: 93 Approved: news@gmane.org Message-ID: References: <3d0ab5b0-73d9-434a-9ae4-cd47d8275590@isocpp.org> <202c5550-8669-4b45-aa39-9a8d26c37015@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_5290_611197915.1413961466434" X-Trace: ger.gmane.org 1413961475 6578 80.91.229.3 (22 Oct 2014 07:04:35 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 22 Oct 2014 07:04:35 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC5NB45SSABBB65NTWRAKGQEEIREPCQ@isocpp.org Wed Oct 22 09:04:30 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-qc0-f198.google.com ([209.85.216.198]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Xgpy8-00040c-Ko for gclcip-std-proposals@m.gmane.org; Wed, 22 Oct 2014 09:04:28 +0200 Original-Received: by mail-qc0-f198.google.com with SMTP id o8sf2861260qcw.5 for ; Wed, 22 Oct 2014 00:04:27 -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 :x-original-sender:reply-to:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-subscribe:list-unsubscribe :content-type; bh=dRn2TiY74GygAOX1dHT35QJ1B/Tvv0nkyVa/DhZamCU=; b=JO24bWKaZIh73HqVRsaI0NvFenMAmJ5QPV9AYrAAMYnfFP2nYLN2+0EAtjO+9VMDUe DI8d/yUhZGBQc++ewjJKKJxx+e1CCUmNyA4pU+DLZzjnhQwIsWyZwqX/rJ68Lr446U3M bTNOlhar5LMCMBby9QU3qRLHdKr3veN2xzi5GEGzA1+ZCzhRUhFUqgfWy4Xm2Q0iXG42 BgtH+vKmLOwiR3Dj6A7VJbzGirJUFSQveP63vCRGI2VrbXQrmP505zXFoaIF5V8G6YJT 5839MYg4fP/UvBoMhMZj0zbNj0bGSjZfwZWat65TiIMZPpJlq9pH/vR4IRxEo6WbbnRn yNzQ== 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:list-post:list-help:list-archive :list-subscribe:list-unsubscribe:content-type; bh=dRn2TiY74GygAOX1dHT35QJ1B/Tvv0nkyVa/DhZamCU=; b=XVYbT+XXdFCNsWmTcmIpcP0XZA+Nj6+zipokn6gML6z0vOXVPPR5BlRm2udXEqr9nK 2g5PwjTbcTEAPGqwK3ySsa4T+evs+DsUXvTzKrHj9d9P8xHLpZnBd4nXmo4GNaZVoZBh ksO+UQVxEOu+zr8rh4KNMSw61NEVwL2K+4aQQOmWSIV3Bj0z39Hr1w1g/PHv2KD1tIIY JytaomzX3mbGPEitMWFt9CAhPj7uvsmRiAeMfHB5f7+mRx/FzTje6oezdIN2kealB0S5 gcJc7onbMYcMmsMZLZzZHJDk6MtJT4nm1tP+tfW35B+lJRWFCwAIACKw7WJXpF7iVm9U 9cwg== X-Gm-Message-State: ALoCoQkWpbQ02GrISVQ3PXGzHQ4LVOyw2x+BhRRag6kXTGw0A8bxnOvNkemxKdafZiQo5KcGejq0 X-Received: by 10.236.209.194 with SMTP id s42mr25755700yho.42.1413961467723; Wed, 22 Oct 2014 00:04:27 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.140.43.100 with SMTP id d91ls617095qga.6.gmail; Wed, 22 Oct 2014 00:04:27 -0700 (PDT) X-Received: by 10.140.109.132 with SMTP id l4mr4903qgf.24.1413961467040; Wed, 22 Oct 2014 00:04:27 -0700 (PDT) In-Reply-To: <202c5550-8669-4b45-aa39-9a8d26c37015@isocpp.org> X-Original-Sender: olafvdspek@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:14115 Archived-At: ------=_Part_5290_611197915.1413961466434 Content-Type: text/plain; charset=UTF-8 On Tuesday, October 21, 2014 10:32:00 PM UTC+2, Chet wrote: > > It has been determined that it is more difficult to implement than you > would think: > > http://stackoverflow.com/questions/23696115/is-pragma-once-part-of-the-c11-standard > > http://stackoverflow.com/questions/1695807/why-isnt-c-cs-pragma-once-an-iso-standard > > The Modules proposal aims to solve the problems of include files in a > better way: > http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4047.pdf > Is it really that difficult? If the name doesn't match an already seen file but the size does one could hash the contents and check the hash. -- --- 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. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/. ------=_Part_5290_611197915.1413961466434 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On Tuesday, October 21, 2014 10:32:00 PM UTC+2, Chet wrote= :
It has = been determined that it is more difficult to implement than you would think= :
http://stackover= flow.com/questions/23696115/is-pragma-once-part-of-the-c11-standa= rd

The Modules proposal aims to solv= e the problems of include files in a better way:

Is it really that difficult?
If the name doesn't match an already seen file but the size does on= e could hash the contents and check the hash.
 

--

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