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<title>Issue 2642: [filesys.ts] 
[PDTS] class path should have defaulted constructors/destructor/assignments.
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[PDTS] class path should have defaulted constructors/destructor/assignments.
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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="2642"><a href="lwg-closed.html#2642">2642</a>. [filesys.ts] 
[PDTS] <code>class path</code> should have defaulted constructors/destructor/assignments.
</h3>
<p><b>Section:</b> 8 [filesys.ts::class.path] <b>Status:</b> <a href="lwg-active.html#NAD">NAD</a>
 <b>Submitter:</b> P.J. Plauger <b>Opened:</b> 2014-01-30 <b>Last modified:</b> 2016-08-12</p>
<p><b>Priority: </b>Not Prioritized
</p>
<p><b>View all other</b> <a href="lwg-index.html#filesys.ts::class.path">issues</a> in [filesys.ts::class.path].</p>
<p><b>View all issues with</b> <a href="lwg-status.html#NAD">NAD</a> status.</p>
<p><b>Discussion:</b></p>
<p><b>Addresses: filesys.ts</b></p>
<p>
<code>class path</code> should have defaulted constructors/destructor/assignments.
</p>

<p><i>[2014-02-26 Beman Dawes comments]</i></p>


<p/>Suggest NAD. Earlier versions did have defaulted constructors/destructor/assignments,
but they were removed at the request of Alberto Ganesh Barbati (c++std-filesys January 8, 2013):

<blockquote>
<p/>Speaking of <code>=default</code>, we have to be careful not over-constrain the specification.
I mean, if we just specify the intended meaning of those function with proper wording,
the implementation is allowed to use <code>=default</code> in case it provides an equivalent behaviour,
but if we put <code>=default</code> in the specification, the implementation is required to use it.
However, we have to remember that "for exposition only" data members may not be an
exhaustive list and that 17.5.2.3/2 allows implementations to provide an equivalent
behaviour using different members for which "default" construction/copy/assignment
may not be appropriate.

<p/><code>=default</code> is what we want for tuple, atomics, etc. It might be appropriate for
simple types like file_status, but, for more complex types like <code>path</code> itself,
I'd remove it and add proper wording.
</blockquote>
  <p><i>[17 Jun 2014 Rapperswil LWG closes as NAD. Ganesh's analysis is correct. WP correct as written.]</i></p>



<p id="res-2642"><b>Proposed resolution:</b></p>
<p></p>





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