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<title>Issue 2737: Consider relaxing object size restrictions for single-object allocation 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#New">New</a> status.</em></p>
<h3 id="2737"><a href="lwg-active.html#2737">2737</a>. Consider relaxing object size restrictions for single-object allocation functions</h3>
<p><b>Section:</b> 17.6.3.2 <a href="https://wg21.link/new.delete.single">[new.delete.single]</a> <b>Status:</b> <a href="lwg-active.html#New">New</a>
 <b>Submitter:</b> Clark Nelson <b>Opened:</b> 2016-06-21 <b>Last modified:</b> 2016-08-01</p>
<p><b>Priority: </b>3
</p>
<p><b>View other</b> <a href="lwg-index-open.html#new.delete.single">active issues</a> in [new.delete.single].</p>
<p><b>View all other</b> <a href="lwg-index.html#new.delete.single">issues</a> in [new.delete.single].</p>
<p><b>View all issues with</b> <a href="lwg-status.html#New">New</a> status.</p>
<p><b>Discussion:</b></p>
<p>
It should be considered whether the description of the
single-object allocation functions should say "or smaller", like
the array allocation functions. For example, according to 17.6.3.2 <a href="https://wg21.link/new.delete.single">[new.delete.single]</a> p1 (emphasis mine):
</p>
<blockquote>
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The allocation function (3.7.4.1) called by a new-expression (5.3.4) to allocate <code>size</code> bytes of
storage suitably aligned to represent any object <em>of that size</em>.
</p>
</blockquote>
<p>
In contrast to this, 17.6.3.3 <a href="https://wg21.link/new.delete.array">[new.delete.array]</a> p1 says (emphasis mine):
</p>
<blockquote>
<p>
The allocation function (3.7.4.1) called by the array form of a new-expression (5.3.4) to allocate
<code>size</code> bytes of storage suitably aligned to represent any array object <em>of that size or smaller</em>. 
(footnote: It is not the direct responsibility of <code>operator new[](std::size_t)</code> or <code>operator delete[](void*)</code> 
to note the repetition count or element size of the array. Those operations are performed elsewhere in the array 
<code>new</code> and <code>delete</code> expressions. The array <code>new</code> expression, may, however, increase the size 
argument to operator <code>new[](std::size_t)</code> to obtain space to store supplemental information.)
</p>
</blockquote>


<p id="res-2737"><b>Proposed resolution:</b></p>





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