220 21007 <8e48c68f-8ef1-4a2b-99e2-0defaeaa9782@isocpp.org> article Path: news.gmane.org!not-for-mail From: Nicol Bolas Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: include [[noreturn]] into function signature Date: Tue, 29 Sep 2015 14:47:29 -0700 (PDT) Lines: 87 Approved: news@gmane.org Message-ID: <8e48c68f-8ef1-4a2b-99e2-0defaeaa9782@isocpp.org> References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_186_1719727515.1443563249582" X-Trace: ger.gmane.org 1443563252 16397 80.91.229.3 (29 Sep 2015 21:47:32 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 29 Sep 2015 21:47:32 +0000 (UTC) Cc: asorenji@gmail.com To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBCEKFTV6ZUMBB4UNVSYAKGQEWFJ4CFQ@isocpp.org Tue Sep 29 23:47:32 2015 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-qk0-f198.google.com ([209.85.220.198]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Zh2kG-0003oV-0P for gclcip-std-proposals@m.gmane.org; Tue, 29 Sep 2015 23:47:32 +0200 Original-Received: by qkdm67 with SMTP id m67sf26226111qkd.1 for ; Tue, 29 Sep 2015 14:47:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:cc: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=PBNdeqWmuGbGN9SGSIH52Vy0xb9ARMM7bpwEKDq7zEI=; b=kOpET2wXg1GZjn5LJBjki9TcMBeAda6MNqIAuQoQFqy3UYMgNDz15tNG3ajRYIDBke 9GbT5VdyesbaSSexvEj5cVXXDW7d+uAbQOzhA+hyctxXq+dLQzJbmM7U3sH4KUrycFHG NJ/AIxPUtOu8KpTt68CBTZE7OZvs3wuHSJTkH8Km0ZybqU+jnjqr7Orc7UtNGeF0VGQx WwVfGRErfGifr+RF557PDtyAJp0/yBy3WwnDrNAoeiBUOjKLjKu6jNtfPROtEesgzCVo O4IounnYivyUOjqnFxRbcv1ht11Tik6YRFWqVuQbCr+EYHQn+k22D1VI7R/awoFxJB+W 2b+Q== 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:cc: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=PBNdeqWmuGbGN9SGSIH52Vy0xb9ARMM7bpwEKDq7zEI=; b=c7260TCCV3yMB+vxjtD9qMN3rc+HWRCUZrvkBLbhZ9rfedjW4kykm6uFQouOn/XGfA ybJen+UzTLzGj8DlP4pv2hZPbo3A7kq37dRUeiy0TezYgh6u/8IXQIuU+ehbmVtIFjMH IU+Zj3n+R9DtxHRv++rsHEGMHj7NUNjpSIJGoMZtJ4t/hM9Zhby2mA/rArof+4i1xTQC PUn8z0UaEQ4Un3RWod4zXVlT1YKR2WdRUnq3cuzoUohuUUYvZc8o2udFq3UbZ60DRf+c HohAKrkeFr/OUJ6BR1YWs0XNNYMdBhGTZCDnAg1ARIykWGdlAp/cBWUwdWPIvcWeAPtz qJ7Q== X-Gm-Message-State: ALoCoQnd5+7fcC9uM+RioFX4ttynkbllxXX/HGF5jGeIJe0YmTTVhYeTokxAM5K/hqVoH0Rc9N36 X-Received: by 10.129.83.10 with SMTP id h10mr298306ywb.6.1443563251069; Tue, 29 Sep 2015 14:47:31 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.50.77.75 with SMTP id q11ls1295452igw.40.canary; Tue, 29 Sep 2015 14:47:30 -0700 (PDT) X-Received: by 10.50.8.42 with SMTP id o10mr20701iga.7.1443563250370; Tue, 29 Sep 2015 14:47:30 -0700 (PDT) In-Reply-To: X-Original-Sender: jmckesson@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:21007 Archived-At: ------=_Part_186_1719727515.1443563249582 Content-Type: multipart/alternative; boundary="----=_Part_187_810777375.1443563249583" ------=_Part_187_810777375.1443563249583 Content-Type: text/plain; charset=UTF-8 On Tuesday, September 29, 2015 at 5:29:33 PM UTC-4, Aso Renji wrote: > > Problem: > > class parent > { > > public: > > virtual int some_method()const{error();} > > [[noreturn]] virtual void error()const=0; > }; > > > class child:public parent > > { > > [[noreturn]] void error()const{throw std::runtime_error("Error in > class child");} > }; > > [[noreturn]] is not a part of error method signature. So, i have "warning: > no return statement in function returning non-void" in some_method. > Proposal - include [[noreturn]] attribute to function signature. Sory if my > english is bad. > That's up to the compiler to decide whether to give you that warning. You've done all you can to inform the compiler that the method doesn't need a return statement. -- --- 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_187_810777375.1443563249583 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On Tuesday, September 29, 2015 at 5:29:33 PM UTC-4, Aso Re= nji wrote:

= Problem:

class parent
{

public:

=C2=A0 =C2=A0 virt= ual int some_method()const{error();}

=C2=A0 =C2=A0 [[noreturn]] virtu= al void error()const=3D0;
};


class child:public par= ent

{

=C2=A0 =C2=A0 =C2=A0[[noreturn]] void error()const{throw = std::runtime_error("Error in class child");}
};

[[no= return]] is not a part of error method signature. So, i have "warning:= no return statement in function returning non-void" in some_method. P= roposal - include [[noreturn]] attribute to function signature. Sory if my = english is bad.


That's up to the compile= r to decide whether to give you that warning. You've done all you can t= o inform the compiler that the method doesn't need a return statement.<= br>

--

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