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<title>Issue 945: system_clock::rep not specified</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="945"><a href="lwg-closed.html#945">945</a>. <code>system_clock::rep</code> not specified</h3>
<p><b>Section:</b> 30.7.2 <a href="https://wg21.link/time.clock.system">[time.clock.system]</a> <b>Status:</b> <a href="lwg-active.html#NAD_Editorial">NAD Editorial</a>
 <b>Submitter:</b> Pete Becker <b>Opened:</b> 2008-12-19 <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#time.clock.system">issues</a> in [time.clock.system].</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>
In 30.7.2 <a href="https://wg21.link/time.clock.system">[time.clock.system]</a>, the declaration of <code>system_clock::rep</code> says "see
below", but there is nothing below that describes it.
</p>

<p><i>[
Howard adds:
]</i></p>


<blockquote>
<p>
This note refers to:
</p>

<blockquote><p>
-2- <code>system_clock::duration::min() &lt; system_clock::duration::zero()</code> shall be <code>true</code>.
</p></blockquote>

<p>
I.e. this is standardeze for "<code>system_clock::rep</code> is signed".
Perhaps an editorial note along the lines of:
</p>

<blockquote><p>
-2- <code>system_clock::duration::min() &lt; system_clock::duration::zero()</code>
shall be <code>true</code>. <ins>[<i>Note:</i> <code>system_clock::rep</code> shall be signed. <i>-- end note</i>].</ins>
</p></blockquote>

<p>
?
</p>

</blockquote>

<p><i>[
Batavia (2009-05):
]</i></p>

<blockquote><p>
We agree with the direction of the proposed resolution.
Move to NAD Editorial.
</p></blockquote>



<p id="res-945"><b>Proposed resolution:</b></p>
<p>
Add a note to 30.7.2 <a href="https://wg21.link/time.clock.system">[time.clock.system]</a>, p2:
</p>
<blockquote><p>
-2- <code>system_clock::duration::min() &lt; system_clock::duration::zero()</code>
shall be <code>true</code>. <ins>[<i>Note:</i> <code>system_clock::rep</code> shall be signed. <i>-- end note</i>].</ins>
</p></blockquote>





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