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Merged fixes from trunk to branch

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[SVN r21741]
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Fernando Cacciola
2004-01-14 20:43:53 +00:00
parent 0eb427cabe
commit 06e6a36cea
1 changed files with 9 additions and 9 deletions
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18
OptionalPointee.html
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@ -115,10 +115,9 @@ struct equal_pointees_t : std::binary_function<OptionalPointee,OptionalPointe
} ;
</pre>
<p>The preceding generic function and function object have the following semantics:<br>
If both x and y have valid pointees, it compares values via (*x == *y) or (*x &lt;
*y).<br>
If only one has a valid pointee, returns false.<br>
If both have invalid pointees, returns true.</p>
If both <b>x</b> and <b>y</b> have valid pointees, it compares values via <code>(*x == *y)</code>.<br>
If only one has a valid pointee, returns <code>false</code>.<br>
If both have invalid pointees, returns <code>true</code>.</p>
<a name="less"></a>
<p><u>Less-than relation:</u></p>
<pre>template&lt;class OptionalPointee&gt;
@ -135,11 +134,12 @@ struct less_pointees_t : std::binary_function&lt;OptionalPointee,OptionalPointee
} ;
</pre>
<p>The preceding generic function and function object have the following semantics:<br>
If both x and y have valid pointees, it compares values via (*x == *y) or (*x &lt;
*y).<br>
If only one has a valid pointee, returns false.<br>
If both have invalid pointees, returns false.</p>
<p>All these functions and function
If <b>y</b> has an invalid pointee, returns <code>false</code>.<br>
Else, if <b>x</b> has an invalid pointee, returns <code>true</code>.<br>
Else, ( <b>x</b> and <b>y</b> have valid pointees), compares values via <code>(*x &lt;
*y).</code></p>
<p><br>
All these functions and function
objects are is implemented in <a href="../../boost/utility/compare_pointees.hpp">compare_pointees.hpp</a></p>
<p>Notice that OptionalPointee does not imply aliasing (and optional&lt;&gt; for instance does not alias);
so direct usage of relational operators with the implied aliasing of shallow semantics