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<title>Issue 544: minor NULL problems in C.2</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#NAD_Editorial">NAD Editorial</a> status.</em></p>
<h3 id="544"><a href="lwg-closed.html#544">544</a>. minor NULL problems in C.2</h3>
<p><b>Section:</b> C.8 <a href="https://wg21.link/diff.library">[diff.library]</a> <b>Status:</b> <a href="lwg-active.html#NAD_Editorial">NAD Editorial</a>
 <b>Submitter:</b> Martin Sebor <b>Opened:</b> 2005-11-25 <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#diff.library">issues</a> in [diff.library].</p>
<p><b>View all issues with</b> <a href="lwg-status.html#NAD Editorial">NAD Editorial</a> status.</p>
<p><b>Discussion:</b></p>
<p>
According to C.2.2.3, p1, "the macro NULL, defined in any of &lt;clocale&gt;,
&lt;cstddef&gt;, &lt;cstdio&gt;, &lt;cstdlib&gt;, &lt;cstring&gt;, &lt;ctime&gt;,
or &lt;cwchar&gt;." This is consistent with the C standard.
</p>
<p>
However, Table 95 in C.2 fails to mention &lt;clocale&gt; and &lt;cstdlib&gt;.
</p>
<p>
In addition, C.2, p2 claims that "The C++ Standard library provides
54 standard macros from the C library, as shown in Table 95." While
table 95 does have 54 entries, since a couple of them (including the
NULL macro) are listed more than once, the actual number of macros
defined by the C++ Standard Library may not be 54.
</p>


<p id="res-544"><b>Proposed resolution:</b></p>
<p>
I propose we add &lt;clocale&gt; and &lt;cstdlib&gt; to Table 96 and remove the
number of macros from C.2, p2 and reword the sentence as follows:
</p>
<blockquote><p>
The C++ Standard library <del>provides 54 standard macros from</del>
<ins>defines a number macros corresponding to those defined by</ins> the C 
<ins>Standard</ins> library, as shown in Table 96.
</p></blockquote>

<p><i>[
Portland:  Resolution is considered editorial.  It will be incorporated into the WD.
]</i></p>







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