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<title>Issue 175: Ambiguity for basic_streambuf::pubseekpos() and a few other functions.</title>
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<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#TC1">TC1</a> status.</em></p>
<h3 id="175"><a href="lwg-defects.html#175">175</a>. Ambiguity for <code>basic_streambuf::pubseekpos()</code> and a few other functions.</h3>
<p><b>Section:</b> 99 [depr.ios.members] <b>Status:</b> <a href="lwg-active.html#TC1">TC1</a>
 <b>Submitter:</b> Dietmar K&uuml;hl <b>Opened:</b> 1999-07-23 <b>Last modified:</b> 2016-01-28</p>
<p><b>Priority: </b>Not Prioritized
</p>
<p><b>View all other</b> <a href="lwg-index.html#depr.ios.members">issues</a> in [depr.ios.members].</p>
<p><b>View all issues with</b> <a href="lwg-status.html#TC1">TC1</a> status.</p>
<p><b>Discussion:</b></p>
<p>According to paragraph 8 of this section, the methods
<code>basic_streambuf::pubseekpos()</code>,
<code>basic_ifstream::open()</code>, and <code>basic_ofstream::open</code>
&quot;may&quot; be overloaded by a version of this function taking the
type <code>ios_base::open_mode</code> as last argument argument instead of
<code>ios_base::openmode</code> (<code>ios_base::open_mode</code> is defined
in this section to be an alias for one of the integral types). The
clause specifies, that the last argument has a default argument in
three cases.  However, this generates an ambiguity with the overloaded
version because now the arguments are absolutely identical if the last
argument is not specified.</p>


<p id="res-175"><b>Proposed resolution:</b></p>
<p>In 99 [depr.ios.members] paragraph 8, remove the default arguments for
<code>basic_streambuf::pubseekpos()</code>,
<code>basic_ifstream::open()</code>, and
<code>basic_ofstream::open().</code></p>




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