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Updated documentation; fixed optional::swap

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Andrzej Krzemienski
2014-04-29 01:06:14 +02:00
parent 01b22a0ff0
commit c9f1422560
9 changed files with 767 additions and 52 deletions
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doc/html/boost_optional/optional_references.html
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@ -68,6 +68,22 @@
than the reference itself.
</li>
</ul></div>
<h4>
<a name="boost_optional.optional_references.h0"></a>
<span class="phrase"><a name="boost_optional.optional_references.rvalue_references"></a></span><a class="link" href="optional_references.html#boost_optional.optional_references.rvalue_references">Rvalue
references</a>
</h4>
<p>
Rvalue references and lvalue references to const have the ability in C++ to
extend the life time of a temporary they bind to. Optional references do not
have this capability, therefore to avoid surprising effects it is not possible
to initialize an optional references from a temporary. Optional rvalue references
are disabled altogether. Also, the initialization and assignment of an optional
reference to const from rvalue reference is disabled.
</p>
<pre class="programlisting"><span class="keyword">const</span> <span class="keyword">int</span><span class="special">&amp;</span> <span class="identifier">i</span> <span class="special">=</span> <span class="number">1</span><span class="special">;</span> <span class="comment">// legal</span>
<span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">&amp;&gt;</span> <span class="identifier">oi</span> <span class="special">=</span> <span class="number">1</span><span class="special">;</span> <span class="comment">// illegal</span>
</pre>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>