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<title>Issue 2702: num_put::do_put(..., bool) performs ill-formed do_put call</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="2702"><a href="lwg-active.html#2702">2702</a>. <code>num_put::do_put(..., bool)</code> performs ill-formed <code>do_put</code> call</h3>
<p><b>Section:</b> 28.3.4.3.3.3 <a href="https://wg21.link/facet.num.put.virtuals">[facet.num.put.virtuals]</a> <b>Status:</b> <a href="lwg-active.html#New">New</a>
 <b>Submitter:</b> Hubert Tong <b>Opened:</b> 2016-05-07 <b>Last modified:</b> 2016-05-22</p>
<p><b>Priority: </b>3
</p>
<p><b>View other</b> <a href="lwg-index-open.html#facet.num.put.virtuals">active issues</a> in [facet.num.put.virtuals].</p>
<p><b>View all other</b> <a href="lwg-index.html#facet.num.put.virtuals">issues</a> in [facet.num.put.virtuals].</p>
<p><b>View all issues with</b> <a href="lwg-status.html#New">New</a> status.</p>
<p><b>Discussion:</b></p>
<p>
The call to <code>do_put(out, str, fill, (int)val)</code> in N4582 subclause 28.3.4.3.3.3 <a href="https://wg21.link/facet.num.put.virtuals">[facet.num.put.virtuals]</a> 
paragraph 6 cannot select a best viable function in overload resolution given the overloads listed for 
<code>do_put</code> in 28.3.4.3.3 <a href="https://wg21.link/locale.nm.put">[locale.nm.put]</a>.
<p/>
There is implementation divergence:
</p>
<ul>
<li><p>Some implementations call the <code>long</code> overload (as overriden);</p></li>
<li><p>some implementations call the <code>unsigned long</code> overload (as overriden);</p></li>
<li><p>some implementations call something else.</p></li>
</ul>
<p>
It appears that the resolution to DR <a href="lwg-defects.html#359" title="num_put&lt;&gt;::do_put (..., bool) undocumented (Status: CD1)">359</a><sup><a href="https://cplusplus.github.io/LWG/issue359" title="Latest snapshot">(i)</a></sup> attempted a fix; however, the relevant portion of the 
change was not applied to the WP.
</p>


<p id="res-2702"><b>Proposed resolution:</b></p>





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