220 26360 article Path: news.gmane.org!not-for-mail From: Anthony Williams Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: On P0037 - Fixed-Point Real Numbers Date: Tue, 21 Jun 2016 08:16:57 +0100 Lines: 60 Approved: news@gmane.org Message-ID: References: <201606200924.36959.marc.mutz@kdab.com> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=001a1144b7d045c7000535c49b40 X-Trace: ger.gmane.org 1466493428 30224 80.91.229.3 (21 Jun 2016 07:17:08 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 21 Jun 2016 07:17:08 +0000 (UTC) Cc: Robert Ramey , mcfarlane.john+fixed-point@gmail.com, Marc Mutz To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBD65DK5LTQNBB2WTUO5QKGQEGZC3TOI@isocpp.org Tue Jun 21 09:17:02 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-qk0-f197.google.com ([209.85.220.197]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1bFFvg-0006Wx-OO for gclcip-std-proposals@m.gmane.org; Tue, 21 Jun 2016 09:17:00 +0200 Original-Received: by mail-qk0-f197.google.com with SMTP id 134sf20700811qkd.1 for ; Tue, 21 Jun 2016 00:17:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:x-original-sender:x-original-authentication-results:reply-to :precedence:mailing-list:list-id:x-spam-checked-in-group:list-post :list-help:list-archive:list-subscribe:list-unsubscribe; bh=gg3Xl/sRTpwksubnM60strLmUbTXlmqPHtH9LVlF/44=; b=Gea6KDtsHMVIVgvIBlYKceA3E5Opn87cRToH/jK7vEkOKTPUQfeDlgzVYlk0uaEj6d PYW73q3IjhBHyGXo9LnryMCy1By6+YdQk527BH7Tyy4Gi7o0LbyZePW0OvXlMRbmWGJ2 rTuPKY/L4Q1JtJ9RVS2RbDyGxIGWCX2TUmb/22E+R2vOWUyhUEoyBh5Pe0xTvCNG0gCb oOqOdxIXGZDebkwI9hY+uQhBywcFSl6GOfOGXdkkwmuIyh1X9UJAZbsQ4b1OUdtALdSP HvBjRa69IHNQoKwMuJHGGTBiOZbrHqVEQ4D/YIRxvaLqnEf9BlW8FSCjPJ8xS3JAqQ7I CEgQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=gg3Xl/sRTpwksubnM60strLmUbTXlmqPHtH9LVlF/44=; b=AJq0hQA+X5P3OX9ABlOIsElT4x5AAaNgK0WmzwKxBm2HY36lsLDkyex7FvMeQbPwAB 8MHGxikyXL7j95vi6iVaxBfiidfSCrn0DsJnATVGUWZxiK6eFhSSawbIF33PwvHzBtex BEPrB3OggeKBLrL0LH7Z5g3CyLoceMvixjsK54o9vVl72U1y9w+pEztd4UIMlB15a+8X OrAg/j4+o6dl5pZPjJGMOEogexdjLpgMI6zdsqLvst1qdlhufArY0rOHRzpLVPSy74UY G8p2iPBX/OyOyDcm9eviP89gFrgydVsOlmnhpBsCpbmG1fcV68S9RRowavWa25Lajep9 79tQ== X-Gm-Message-State: ALyK8tJAtiMG5fxoAA513dN3QY5oA5avKQBXXyG0+fbh9zDl9oFSSO3SK2T1+Os+UPanmA== X-Received: by 10.200.49.153 with SMTP id h25mr25555691qte.13.1466493419765; Tue, 21 Jun 2016 00:16:59 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.36.36.85 with SMTP id f82ls138550ita.33.canary; Tue, 21 Jun 2016 00:16:58 -0700 (PDT) X-Received: by 10.107.176.132 with SMTP id z126mr28911869ioe.132.1466493418601; Tue, 21 Jun 2016 00:16:58 -0700 (PDT) Original-Received: from mail-it0-x22b.google.com (mail-it0-x22b.google.com. [2607:f8b0:4001:c0b::22b]) by mx.google.com with ESMTPS id b5si38206558ioa.160.2016.06.21.00.16.58 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 21 Jun 2016 00:16:58 -0700 (PDT) Received-SPF: pass (google.com: domain of anthony.ajw@gmail.com designates 2607:f8b0:4001:c0b::22b as permitted sender) client-ip=2607:f8b0:4001:c0b::22b; Original-Received: by mail-it0-x22b.google.com with SMTP id g127so11384627ith.0 for ; Tue, 21 Jun 2016 00:16:58 -0700 (PDT) X-Received: by 10.36.95.207 with SMTP id r198mr3103249itb.48.1466493418455; Tue, 21 Jun 2016 00:16:58 -0700 (PDT) Original-Received: by 10.50.77.79 with HTTP; Tue, 21 Jun 2016 00:16:57 -0700 (PDT) Original-Received: by 10.50.77.79 with HTTP; Tue, 21 Jun 2016 00:16:57 -0700 (PDT) In-Reply-To: X-Original-Sender: anthony.ajw@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com; spf=pass (google.com: domain of anthony.ajw@gmail.com designates 2607:f8b0:4001:c0b::22b as permitted sender) smtp.mailfrom=anthony.ajw@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-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:26360 Archived-At: --001a1144b7d045c7000535c49b40 Content-Type: text/plain; charset=UTF-8 On 20 Jun 2016 9:17 p.m., "John McFarlane" wrote: > > If `fixed_point` took a `ratio` object, its range would be reduced to the range of `maxint_t`. Here's an example of functionality what would not be possible with such a limitation: [ https://github.com/johnmcfarlane/fixed_point/blob/5d1a016b865ecbcf8479059fdabae9406cff984a/src/test/index.cpp#L94 ]. > It could be specified to take either a std::ratio or a new exponent template. Anthony -- 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/CAMWMAmXSX%2Biou48Yv-OiNFtiSGoWp2GHJcsbDfszA%2BvC92fnzQ%40mail.gmail.com. --001a1144b7d045c7000535c49b40 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On 20 Jun 2016 9:17 p.m., "John McFarlane" <mcfarlane.john@gmail.com> wrote:
>
> If `fixed_point` took a `ratio` object, its range would be reduced to = the range of `maxint_t`. Here's an example of functionality what would = not be possible with such a limitation: [https://github.com/johnmcfarlane/fixed_point/blob/5d1a016b= 865ecbcf8479059fdabae9406cff984a/src/test/index.cpp#L94].
>

It could be specified to take either a std::ratio or a new e= xponent<base,power> template.

Anthony

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