220 33443 article Path: news.gmane.org!.POSTED!not-for-mail From: Paul Hampson Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Proposal: underlying_cast Date: Sun, 30 Jul 2017 07:35:25 -0700 (PDT) Lines: 90 Approved: news@gmane.org Message-ID: References: <6a2c32ed-99b5-4cc5-86a5-ee3cc07567a3@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_3335_948021419.1501425325670" X-Trace: blaine.gmane.org 1501425330 5893 195.159.176.226 (30 Jul 2017 14:35:30 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 30 Jul 2017 14:35:30 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDBKDIHOXMCRBLW567FQKGQEZSYFUHI@isocpp.org Sun Jul 30 16:35:22 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-io0-f200.google.com ([209.85.223.200]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dbpJR-00016g-O8 for gclcip-std-proposals@m.gmane.org; Sun, 30 Jul 2017 16:35:21 +0200 Original-Received: by mail-io0-f200.google.com with SMTP id j32sf233136622iod.15 for ; Sun, 30 Jul 2017 07:35:28 -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 :list-post:list-help:list-archive:list-subscribe:list-unsubscribe; bh=ngRqfHoKfgfYKRtwy3nYcG08Gq0KbKlR9GnxS3oos/I=; b=NEAGPYmVXNVKD9VnQrsxphVfH6v3g/H5vWge6zAsVDTO9rzR0WVXq/jUmxS5nuaPPD T2fqIfjKYdKSFLvxaK1pSozCffSnAvW7nRtVpPZgqV+iQwtnOX/mACESLeGWBe4F5LtR AvQQdF3eXsCrvYaNr85ri7c1XGSd4M+DNQztNMgEPgIclcXbJ7fHfx52L3Qt/ZuzC0Bh JRIxVYCRRhunFw4HwyslT+McYWDDcSirYRzYcSV78EF+9qXW4uX44QnWp35rLCt7Uhqh T2Rz7qYIfstCCH4oJYBcaa9Ng+jWgtMQCNcXXmZceF2B0ptKOqCuyrQb34fClftjNWsF PIiQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; 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=ngRqfHoKfgfYKRtwy3nYcG08Gq0KbKlR9GnxS3oos/I=; b=Mgxk+z3xFMIan/p3Mu6F4X5hGSPkB4voQ6Qb4qT3Sps4QpOyqg5maCED79WSd9nTux Vgp+SP88hiv/Dzv9SOI/0D9hbaaWslE07CLW21EJt4rACIgm68UifdQHosGG7RDWgIku Lu69wYmFu10F89/KIRcsNWOX6nRDm3XTjhmAdmjcNdYvTPVrpFnRM1MFPTn+GK75ldEE yau18bQ+UCOoDqeqWVbVEcTYo58aTUt0n7zraHnBUeDFPPejisghjJZfyEsIHtoKUOu9 VehZOWh39ND628uj7G/vK0pZCAqA7cXtudmevE3iBSPigOfxJd7enQsq9tha+fUgb+/J VRRw== X-Gm-Message-State: AIVw113yemIIPmD5/vuE6wVU+D6zkK9Y+MCjE0qhGoSvFPo4jo5u8JFT anu3GiWPlbhwVXf2 X-Received: by 10.107.53.100 with SMTP id c97mr9888193ioa.12.1501425327418; Sun, 30 Jul 2017 07:35:27 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.36.44.69 with SMTP id i66ls6793288iti.9.canary-gmail; Sun, 30 Jul 2017 07:35:26 -0700 (PDT) X-Received: by 10.31.179.145 with SMTP id c139mr68244vkf.24.1501425326079; Sun, 30 Jul 2017 07:35:26 -0700 (PDT) In-Reply-To: X-Original-Sender: paul.hampson@pobox.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:33443 Archived-At: ------=_Part_3335_948021419.1501425325670 Content-Type: multipart/alternative; boundary="----=_Part_3336_2075601527.1501425325670" ------=_Part_3336_2075601527.1501425325670 Content-Type: text/plain; charset="UTF-8" On Monday, 31 July 2017 00:31:49 UTC+10, Paul Hampson wrote: > However, gcc 8 picked 'int', and both clang 4.0 and MSC++ 19.10 picked > "ambiguous", so I might be missing something here. ( > https://godbolt.org/g/FZmhHj) > > A recently-left (Feb 2017) comment on > https://wg21.cmeerw.net/cwg/issue1601 agrees with 'ambiguous', and the > discussion > > that led to CWG1601 seemed to be leaning towards 'ambiguous' too. > https://stackoverflow.com/a/34336157/166389 says I'm right about this, and all the compilers are wrong. Or at least that my confirmation bias is good at cherry-picking Google results on Stackoverflow. -- 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/ea740118-78c1-4984-9cc9-3a447e439e59%40isocpp.org. ------=_Part_3336_2075601527.1501425325670 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
On Monday, 31 July 2017 00:31:49 UTC+10, Paul Hampson wro= te:
=C2=A0
However, gcc 8 picked 'int', and both= clang 4.0 and MSC++ 19.10 picked "ambiguous", so I might be miss= ing something here. (https://godbolt.org/g/FZmhHj)

A recently-left (Feb 2017) comment on=C2=A0https://wg21.cmeerw.net/cwg/issue1601 agrees with 'a= mbiguous', and the discussion that led t= o CWG1601 seemed to be leaning towards 'ambiguous' too.
https://stackoverflow.com/a/34336157/166389 says I'm right about thi= s, and all the compilers are wrong.

Or at least th= at my confirmation bias is good at cherry-picking Google results on Stackov= erflow.

--
You received this message because you are subscribed to the Google Groups &= quot;ISO C++ Standard - Future Proposals" group.
To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposa= ls+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/ea740118-78c1-4984-9cc9-3a447e439e59= %40isocpp.org.
------=_Part_3336_2075601527.1501425325670-- ------=_Part_3335_948021419.1501425325670-- .