<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Issue 2481: wstring_convert should be more precise regarding "byte-error string" etc.</title>
<meta property="og:title" content="Issue 2481: wstring_convert should be more precise regarding &quot;byte-error string&quot; etc.">
<meta property="og:description" content="C++ library issue. Status: New">
<meta property="og:url" content="https://cplusplus.github.io/LWG/issue2481.html">
<meta property="og:type" content="website">
<meta property="og:image" content="http://cplusplus.github.io/LWG/images/cpp_logo.png">
<meta property="og:image:alt" content="C++ logo">
<style>
  p {text-align:justify}
  li {text-align:justify}
  pre code.backtick::before { content: "`" }
  pre code.backtick::after { content: "`" }
  blockquote.note
  {
    background-color:#E0E0E0;
    padding-left: 15px;
    padding-right: 15px;
    padding-top: 1px;
    padding-bottom: 1px;
  }
  ins {background-color:#A0FFA0}
  del {background-color:#FFA0A0}
  table.issues-index { border: 1px solid; border-collapse: collapse; }
  table.issues-index th { text-align: center; padding: 4px; border: 1px solid; }
  table.issues-index td { padding: 4px; border: 1px solid; }
  table.issues-index td:nth-child(1) { text-align: right; }
  table.issues-index td:nth-child(2) { text-align: left; }
  table.issues-index td:nth-child(3) { text-align: left; }
  table.issues-index td:nth-child(4) { text-align: left; }
  table.issues-index td:nth-child(5) { text-align: center; }
  table.issues-index td:nth-child(6) { text-align: center; }
  table.issues-index td:nth-child(7) { text-align: left; }
  table.issues-index td:nth-child(5) span.no-pr { color: red; }
  @media (prefers-color-scheme: dark) {
     html {
        color: #ddd;
        background-color: black;
     }
     ins {
        background-color: #225522
     }
     del {
        background-color: #662222
     }
     a {
        color: #6af
     }
     a:visited {
        color: #6af
     }
     blockquote.note
     {
        background-color: rgba(255, 255, 255, .10)
     }
  }
</style>
</head>
<body>
<hr>
<p><em>This page is a snapshot from the LWG issues list, see the <a href="lwg-active.html">Library Active Issues List</a> for more information and the meaning of <a href="lwg-active.html#New">New</a> status.</em></p>
<h3 id="2481"><a href="lwg-active.html#2481">2481</a>. <code>wstring_convert</code> should be more precise regarding "byte-error string" etc.</h3>
<p><b>Section:</b> 99 [depr.conversions.string] <b>Status:</b> <a href="lwg-active.html#New">New</a>
 <b>Submitter:</b> Jonathan Wakely <b>Opened:</b> 2015-03-04 <b>Last modified:</b> 2017-04-22</p>
<p><b>Priority: </b>4
</p>
<p><b>View other</b> <a href="lwg-index-open.html#depr.conversions.string">active issues</a> in [depr.conversions.string].</p>
<p><b>View all other</b> <a href="lwg-index.html#depr.conversions.string">issues</a> in [depr.conversions.string].</p>
<p><b>View all issues with</b> <a href="lwg-status.html#New">New</a> status.</p>
<p><b>Discussion:</b></p>
<p>
Paragraph 4 of 99 [depr.conversions.string] introduces <code>byte_err_string</code> 
as "a byte string to display on errors". What does display mean? The string is returned 
on error, it's not displayed anywhere.
<p/>
Paragraph 14 says "Otherwise, if the object was constructed with a
byte-error string, the member function shall return the byte-error
string." The term byte-error string is not used anywhere else.
<p/>
Paragraph 17 talks about storing "default values in <code>byte_err_string</code>".
What default value? Is "Hello, world!" allowed? If it means
default-construction it should say so. If paragraph 14 says it won't
be used what does it matter how it's initialized? The end of the
paragraph refers to storing "<code>byte_err</code> in <code>byte_err_string</code>". This should
be more clearly related to the wording in paragraph 14.
<p/>
It might help if the constructor (and destructor) was specified before
the other member functions, so it can more formally define the
difference between being "constructed with a byte-error string" and
not.
<p/>
All the same issues apply to the <code>wide_err_string</code> member.
</p>


<p id="res-2481"><b>Proposed resolution:</b></p>





</body>
</html>
