220 13413 <1c901f36-2346-41f2-81cd-d493cff45351@isocpp.org> article Path: news.gmane.org!not-for-mail From: Matheus Izvekov Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: atof(string_view) and others Date: Tue, 30 Sep 2014 19:26:42 -0700 (PDT) Lines: 64 Approved: news@gmane.org Message-ID: <1c901f36-2346-41f2-81cd-d493cff45351@isocpp.org> References: <2118839.fukHYmiT6S@tjmaciei-mobl4> <77247918-fbe5-418d-ab30-8b4b852dace9@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_4725_639648995.1412130402467" X-Trace: ger.gmane.org 1412130413 1455 80.91.229.3 (1 Oct 2014 02:26:53 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 1 Oct 2014 02:26:53 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCOKZ27XTMNRBY6MVWQQKGQE6FRBJQI@isocpp.org Wed Oct 01 04:26:47 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ie0-f199.google.com ([209.85.223.199]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1XZ9cq-0003C9-Qg for gclcip-std-proposals@m.gmane.org; Wed, 01 Oct 2014 04:26:45 +0200 Original-Received: by mail-ie0-f199.google.com with SMTP id y20sf1103547ier.10 for ; Tue, 30 Sep 2014 19:26:43 -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=WmYjIBeGyhXp7u31z2yIxBWBijhksAADxzZD0npqHnE=; b=EuJ1Kiydz9JzlZCDB4DO1aid5gxjgX8LftjcuFghTiYNXHrQhMUq1vHA3AAuiKvBYU 3+zRLCeVJ+edS6OtXNQ4O1IofAAi5DGXhPokf3CT+KYmfrqbqqhdhrKlykjE8RgPjIUV uXXecmvUZmWrFq2pw1bdZTXNbZ06xWC49K8ab/w009UsSl+fgiuiYEzlUoTxAE2sAIdz lRbxvbgDIPLYr/8Lck8TLqPQc6dT9FkNY2nTgoA3xvn6p57gqse3zlTsJVLD9rkDsRUl RaQxw6AXmvtQ9LZtSStwmczsnOd7EagslKLeFKvYAFD21mJ27va3dCH4SclTA7srKutu RPJw== 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=WmYjIBeGyhXp7u31z2yIxBWBijhksAADxzZD0npqHnE=; b=OfeLaR32E79cukfq7XQutheXq0xmoCGwgHc9E9S8Ke0qjUjV6Vb1Gm+oN/IxGZalU+ oIzjR5BhxsXZ473NxBwGE3Y4Tr7QjByVAWCp7vRSaFx57R/6uzlXbo3qWxWXF9Fg0ubF gnadXMD+rGFWs5CLUQngV6TfpGhYQvNAh1pA2soH5QYSZwP9LqfWPQKzogQ6/PVqtmMS 6/rx5OunK/Qv3guj9IJuP0njYXLXilI16fVlvud8vTtfXAcrBsZ2BtQGw4eZXeFdqFzQ 2Z+mI/y/hJN44BbBJ4awwmR4Grt1pV2PinhLaX2Ad7zOGnQhtUK/yjcP4cgRjbHQcqL1 tcXA== X-Gm-Message-State: ALoCoQlgjDbFAZ0BZsWkxyKAspTlLE5Zowib87ZDxG8U8XqyYmPeX4RPmd70a0sUUxO4qR5CjQW+ X-Received: by 10.182.199.4 with SMTP id jg4mr43410196obc.43.1412130403907; Tue, 30 Sep 2014 19:26:43 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.140.48.131 with SMTP id o3ls319250qga.28.gmail; Tue, 30 Sep 2014 19:26:43 -0700 (PDT) X-Received: by 10.140.39.39 with SMTP id u36mr35873qgu.8.1412130403288; Tue, 30 Sep 2014 19:26:43 -0700 (PDT) In-Reply-To: <77247918-fbe5-418d-ab30-8b4b852dace9@isocpp.org> X-Original-Sender: mizvekov@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:13413 Archived-At: ------=_Part_4725_639648995.1412130402467 Content-Type: text/plain; charset=UTF-8 On Tuesday, September 30, 2014 11:13:40 PM UTC-3, Matthew Fioravante wrote: > > I have a few issues with optional: > > 1. You lose the ability to check specific error conditions like > ERANGE. I'm not sure how useful this is as I've never done an ERANGE check > on a number parse but that functionality is available with the legacy > functions. > 2. If you want to enable a throwing interface by just calling > optional::value() and letting it throw on error, you'll be throwing a > std::bad_optional_access. It would be better to throw an exception class > which is more specifically related to parsing numbers and has information > on what went wrong. > > You can use expected instead of optional, if that gets accepted. -- --- 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_4725_639648995.1412130402467 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On Tuesday, September 30, 2014 11:13:40 PM UTC-3, Matthew = Fioravante wrote:
I have a few issues with optional:
  1. You lose the ability to check specific error conditions= like ERANGE. I'm not sure how useful this is as I've never done an ERANGE = check on a number parse but that functionality is available with the legacy= functions.
  2. If you want t= o enable a throwing interface by just calling optional::value() and letting= it throw on error, you'll be throwing a std::bad_optional_access. It would= be better to throw an exception class which is more specifically related t= o parsing numbers and has information on what went wrong. 
    3. =
You can use expected instead of optional= , if that gets accepted.

--

---
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.
Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/<= /a>.
------=_Part_4725_639648995.1412130402467-- .