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none_t is no loner constructible from literal 0

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This caused problems because:
optional<T> o = 0;
always worked. But often it would create an uninitialized optional.
This commit is contained in:
Andrzej Krzemienski
2014-11-22 01:18:25 +01:00
parent 5435021ea4
commit 53e53171c4
7 changed files with 63 additions and 5 deletions
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2
doc/html/boost_optional/tutorial/relational_operators.html
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@ -30,7 +30,7 @@
<p>
Type <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span></code> is
<a href="http://www.sgi.com/tech/stl/EqualityComparable.html" target="_top"><code class="computeroutput"><span class="identifier">EqualityComparable</span></code></a> whenever <code class="computeroutput"><span class="identifier">T</span></code> is <a href="http://www.sgi.com/tech/stl/EqualityComparable.html" target="_top"><code class="computeroutput"><span class="identifier">EqualityComparable</span></code></a>. Two optional
objects containing a value compare in the same as their contained values.
objects containing a value compare in the same way as their contained values.
The uninitialized state of <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span></code>
is treated as a distinct value, equal to itself, and unequal to any value
of type <code class="computeroutput"><span class="identifier">T</span></code>:

7
doc/html/index.html
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@ -108,8 +108,9 @@
It is possible that this parameter is not specified; such situation is no error.
It is valid to not specify the parameter and in that case the program is supposed
to behave slightly differently. Also, suppose that any possible value of type
<code class="computeroutput"><span class="keyword">int</span></code> is a valid value for <code class="computeroutput"><span class="string">"MaxValue"</span></code>, so we cannot jut use <code class="computeroutput"><span class="special">-</span><span class="number">1</span></code> to represent
the absence of the parameter in the config file.
<code class="computeroutput"><span class="keyword">int</span></code> is a valid value for <code class="computeroutput"><span class="string">"MaxValue"</span></code>, so we cannot just use
<code class="computeroutput"><span class="special">-</span><span class="number">1</span></code>
to represent the absence of the parameter in the config file.
</p>
<h4>
<a name="optional.introduction.h1"></a>
@ -133,7 +134,7 @@
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"><p><small>Last revised: September 12, 2014 at 09:54:26 GMT</small></p></td>
<td align="left"><p><small>Last revised: November 21, 2014 at 23:32:40 GMT</small></p></td>
<td align="right"><div class="copyright-footer"></div></td>
</tr></table>
<hr>