220 32079 <8d3f00ec-78b6-4b58-af90-8d91e382fec1@isocpp.org> article Path: news.gmane.org!.POSTED!not-for-mail From: Nicol Bolas Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: why std::random_device::result_type isnt implementation-defined or std::size_t? Date: Tue, 11 Apr 2017 15:12:42 -0700 (PDT) Lines: 60 Approved: news@gmane.org Message-ID: <8d3f00ec-78b6-4b58-af90-8d91e382fec1@isocpp.org> References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_1244_886921538.1491948762499" X-Trace: blaine.gmane.org 1491948763 29567 195.159.176.226 (11 Apr 2017 22:12:43 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 11 Apr 2017 22:12:43 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBCEKFTV6ZUMBBW5JWXDQKGQE5BWY6YQ@isocpp.org Wed Apr 12 00:12:38 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-yb0-f200.google.com ([209.85.213.200]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cy41e-0007am-DT for gclcip-std-proposals@m.gmane.org; Wed, 12 Apr 2017 00:12:38 +0200 Original-Received: by mail-yb0-f200.google.com with SMTP id 206sf4154327ybe.11 for ; Tue, 11 Apr 2017 15:12:44 -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 :x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=BXHM/qzzxwkwyakq1q2/JQYcNRVYPpVhI+BaWsvrXco=; b=qqPWy5Fyux4c6yYQ68jd/VUzeBiFbJKS0fuVZnSKYsooFtWUj9BHIatSz4amjfgZo5 FCdHItUd+vC2tGNQ1HHDhT40beMxk9WJAs0QWbS9FEsYHleoKCMN/CV9fM+uXsLFfigs 8PdfVJYYAGX9EQQv2X06x3rhpgqfQhJ0mCX/YuV5QRERHlMQO+7XbkHcG0bv8Sq6HSRf fftXk9BbH7azoMsTcakebdi+rI/MivWEyWJB15hchrC1EHpUPKybs2YZa7DqE1v3laoJ 6xyvbjeXl3K4Dz5eEmkHASL0tisY5AaHjOZ+RH7v0H4HR7GIA63Ol5g6h/K8ObAVYF2V pQMg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=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=BXHM/qzzxwkwyakq1q2/JQYcNRVYPpVhI+BaWsvrXco=; b=ui2lzN+TyueP0R+5Fy11AItNN9MDGdgCQ636VuMckq87wQZnuz0MxeUSaN84aufKiM FNaS4EeGejusRjogkGqc9fuNv5VQ/1Y/D99NYLP8a9TCjfvgtfsnyJsm+KnPVPooQzjC JoDN65B5YRb6Vha01wkCBUo9B40/5bDxUR6Qt7F6E9wddzOgnXegXfTvmalNs22I5579 ZRugpcu197eY8IEGDKTOgcl8KfXuOqYayfsJsUFigvU6eNPNGz50cDPLZD3WtbWaLFJP 3B5zn/HejjTCe6SkdVHog9Eb2FOU33NvbT0MEtUaXDKGBDrKQtQusblE5fe/AKpALvKs KOUA== 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=BXHM/qzzxwkwyakq1q2/JQYcNRVYPpVhI+BaWsvrXco=; b=j5iiLosByPJlhEN2Zesx7oqAKRkbVzukhQ4imcH+Al8tUFn91ZyufMB8HPSyfoFhxX /RSQ0OMycGdCm4iMZogYK9lNUYEYw9+UREpg4SpRYjxHmmyAK2ngpBW2RO+0zOnAFyKQ K+v7F1T137Ct0KX6nY4bF+cJfXlOzqVPGpkKF+aRmTn29avEnhcL+/cQDVXnzLn9kF40 tDH2+49nL3VAYDVlAgTJCwnZwqijMTWRiaeCoi1rlFnV+sv/Vux8QzFcJX3F9XkeM6pc 1IFKoDxkweivRx9oGyjiHI4u9BXr9C1vOpGZ53q/WO2VkmIp++ZPSqTaH4guUoBqyJuj ZjFA== X-Gm-Message-State: AFeK/H3EzPjiUpGAP8WoBaduuB2ZphWXvG0cF/SvMjRBAsE9GQy9Ygn7G9eb87QTSwze7g== X-Received: by 10.129.18.130 with SMTP id 124mr23940694yws.56.1491948764015; Tue, 11 Apr 2017 15:12:44 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.157.8.69 with SMTP id 63ls1236891oty.21.gmail; Tue, 11 Apr 2017 15:12:43 -0700 (PDT) X-Received: by 10.157.43.178 with SMTP id u47mr412154ota.3.1491948763073; Tue, 11 Apr 2017 15:12:43 -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-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:32079 Archived-At: ------=_Part_1244_886921538.1491948762499 Content-Type: multipart/alternative; boundary="----=_Part_1245_1858111069.1491948762499" ------=_Part_1245_1858111069.1491948762499 Content-Type: text/plain; charset=UTF-8 On Tuesday, April 11, 2017 at 5:14:25 PM UTC-4, ejsvifq mabmip wrote: > > why std::random_device::result_type isnt implementation-defined or > std::size_t? > unsigned int isn't good since we will never know its size > We never know the size of `size_t` either. Since the size of `unsigned int` is also implementation defined, what does it matter if the standard said that `result_type` was implementaiton-defined or `unsigned int`? In both cases, you "will never know its size". -- 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/8d3f00ec-78b6-4b58-af90-8d91e382fec1%40isocpp.org. ------=_Part_1245_1858111069.1491948762499 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On Tuesday, April 11, 2017 at 5:14:25 PM UTC-4, ejsvifq ma= bmip wrote:
wh= y std::random_device::result_type isnt implementation-defined or std::= size_t?
unsigned int isn't good since we will never know its size

We never know the size of `size_t` either. Since t= he size of `unsigned int` is also implementation defined, what does it matt= er if the standard said that `result_type` was implementaiton-defined or `u= nsigned int`? In both cases, you "will never know its size".
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