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<title>Issue 439: Should facets be copyable?</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">NAD</a> status.</em></p>
<h3 id="439"><a href="lwg-closed.html#439">439</a>. Should facets be copyable?</h3>
<p><b>Section:</b> 28.3.4 <a href="https://wg21.link/locale.categories">[locale.categories]</a> <b>Status:</b> <a href="lwg-active.html#NAD">NAD</a>
 <b>Submitter:</b> Matt Austern <b>Opened:</b> 2003-11-02 <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#locale.categories">issues</a> in [locale.categories].</p>
<p><b>View all issues with</b> <a href="lwg-status.html#NAD">NAD</a> status.</p>
<p><b>Discussion:</b></p>
<p>The following facets classes have no copy constructors described in
  the standard, which, according to the standard, means that they are
  supposed to use the compiler-generated defaults.  Default copy
  behavior is probably inappropriate.  We should either make these
  classes uncopyable or else specify exactly what their constructors do.</p>

<p>Related issue: <a href="lwg-closed.html#421" title="is basic_streambuf copy-constructible? (Status: NAD)">421</a><sup><a href="https://cplusplus.github.io/LWG/issue421" title="Latest snapshot">(i)</a></sup>.</p>

<pre>
        ctype_base
        ctype
        ctype_byname
        ctype&lt;char>
        ctype_byname&lt;char>
        codecvt_base
        codecvt
        codecvt_byname
        num_get
        num_put
        numpunct
        numpunct_byname
        collate
        collate_byname
        time_base
        time_get
        time_get_byname
        time_put
        time_put_byname
        money_get
        money_put
        money_base
        moneypunct
        moneypunct_byname
        messages_base
        messages
        messages_byname
</pre>



<p id="res-439"><b>Proposed resolution:</b></p>


<p><b>Rationale:</b></p>
<p>The copy constructor in the base class is private.</p>





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