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docs: optional<T> == nont_t requirements

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Andrzej Krzemienski
2014-06-08 20:51:55 +02:00
parent befd3970d7
commit 07bdbc3743
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doc/html/boost_optional/tutorial/relational_operators.html
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@ -71,6 +71,11 @@
In the above example, the meaning of the comparison is 'user chose number
2'. If user chose nothing, he didn't choose number 2.
</p>
<p>
In case where <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
compared to <code class="computeroutput"><span class="identifier">none</span></code>, it is not
required that <code class="computeroutput"><span class="identifier">T</span></code> be <a href="http://www.sgi.com/tech/stl/EqualityComparable.html" target="_top"><code class="computeroutput"><span class="identifier">EqualityComparable</span></code></a>.
</p>
<p>
In a similar manner, 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/LessThanComparable.html" target="_top"><code class="computeroutput"><span class="identifier">LessThanComparable</span></code></a> whenever <code class="computeroutput"><span class="identifier">T</span></code> is <a href="http://www.sgi.com/tech/stl/LessThanComparable.html" target="_top"><code class="computeroutput"><span class="identifier">LessThanComparable</span></code></a>. The optional