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<title>Issue 173: Inconsistent types for basic_filebuf::setbuf()</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="173"><a href="lwg-defects.html#173">173</a>. Inconsistent types for <code>basic_filebuf::setbuf()</code></h3>
<p><b>Section:</b> 31.10.3.5 <a href="https://wg21.link/filebuf.virtuals">[filebuf.virtuals]</a> <b>Status:</b> <a href="lwg-active.html#TC1">TC1</a>
 <b>Submitter:</b> Greg Comeau, 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#filebuf.virtuals">issues</a> in [filebuf.virtuals].</p>
<p><b>View all issues with</b> <a href="lwg-status.html#TC1">TC1</a> status.</p>
<p><b>Discussion:</b></p>

<p>
In 31.10.3 <a href="https://wg21.link/filebuf">[filebuf]</a> the function <code>setbuf()</code> gets an
object of type <code>streamsize</code> as second argument. However, in
31.10.3.5 <a href="https://wg21.link/filebuf.virtuals">[filebuf.virtuals]</a> paragraph 9 the second argument is of type
<code>int</code>.
</p>

<p>
As far as I can see this is not really a contradiction because
everything is consistent if <code>streamsize</code> is typedef to be
<code>int</code>. However, this is almost certainly not what was
intended. The same thing happened to <code>basic_istream::ignore()</code>,
as described in issue <a href="lwg-defects.html#172" title="Inconsistent types for basic_istream::ignore() (Status: TC1)">172</a><sup><a href="https://cplusplus.github.io/LWG/issue172" title="Latest snapshot">(i)</a></sup>.
</p>



<p id="res-173"><b>Proposed resolution:</b></p>
<p>In 31.10.3.5 <a href="https://wg21.link/filebuf.virtuals">[filebuf.virtuals]</a> paragraph 9, change all uses of
<code>int</code> in the description of <code>setbuf()</code> to
<code>streamsize</code>.</p>




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