Imported from /home/lorry/working-area/delta_boost-tarball/boost_1_58_0.tar.bz2.HEADboost_1_58_0master

13 files changed, 333 insertions, 23 deletions

diff --git a/libs/optional/doc/html/boost_optional/tutorial/a_note_about_optional_bool_.html b/libs/optional/doc/html/boost_optional/tutorial/a_note_about_optional_bool_.html
index ea3618b87..def5bbfd2 100644
--- a/libs/optional/doc/html/boost_optional/tutorial/a_note_about_optional_bool_.html
+++ b/libs/optional/doc/html/boost_optional/tutorial/a_note_about_optional_bool_.html
@@ -94,7 +94,7 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014 Andrzej Krzemie&#324;ski<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014, 2015 Andrzej Krzemie&#324;ski<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>
diff --git a/libs/optional/doc/html/boost_optional/tutorial/design_overview.html b/libs/optional/doc/html/boost_optional/tutorial/design_overview.html
index d6598bca6..cc5e3b467 100644
--- a/libs/optional/doc/html/boost_optional/tutorial/design_overview.html
+++ b/libs/optional/doc/html/boost_optional/tutorial/design_overview.html
@@ -170,7 +170,7 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014 Andrzej Krzemie&#324;ski<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014, 2015 Andrzej Krzemie&#324;ski<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>
diff --git a/libs/optional/doc/html/boost_optional/tutorial/design_overview/the_interface.html b/libs/optional/doc/html/boost_optional/tutorial/design_overview/the_interface.html
index 984ae4bf1..c3833ffb8 100644
--- a/libs/optional/doc/html/boost_optional/tutorial/design_overview/the_interface.html
+++ b/libs/optional/doc/html/boost_optional/tutorial/design_overview/the_interface.html
@@ -63,8 +63,8 @@
         </p>
 <h6>
 <a name="boost_optional.tutorial.design_overview.the_interface.h0"></a>
-          <span class="phrase"><a name="boost_optional.tutorial.design_overview.the_interface.lexically_hinted_value_access_in_the_presence_of_possibly_untitialized_optional_objects__the_operators___and___gt_"></a></span><a class="link" href="the_interface.html#boost_optional.tutorial.design_overview.the_interface.lexically_hinted_value_access_in_the_presence_of_possibly_untitialized_optional_objects__the_operators___and___gt_">Lexically-hinted
-          Value Access in the presence of possibly untitialized optional objects:
+          <span class="phrase"><a name="boost_optional.tutorial.design_overview.the_interface.lexically_hinted_value_access_in_the_presence_of_possibly_uninitialized_optional_objects__the_operators___and___gt_"></a></span><a class="link" href="the_interface.html#boost_optional.tutorial.design_overview.the_interface.lexically_hinted_value_access_in_the_presence_of_possibly_uninitialized_optional_objects__the_operators___and___gt_">Lexically-hinted
+          Value Access in the presence of possibly uninitialized optional objects:
           The operators * and -&gt;</a>
         </h6>
 <p>
@@ -173,7 +173,7 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014 Andrzej Krzemie&#324;ski<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014, 2015 Andrzej Krzemie&#324;ski<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>
diff --git a/libs/optional/doc/html/boost_optional/tutorial/design_overview/the_semantics.html b/libs/optional/doc/html/boost_optional/tutorial/design_overview/the_semantics.html
index 5dbc63b32..9a38fefe8 100644
--- a/libs/optional/doc/html/boost_optional/tutorial/design_overview/the_semantics.html
+++ b/libs/optional/doc/html/boost_optional/tutorial/design_overview/the_semantics.html
@@ -107,7 +107,7 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014 Andrzej Krzemie&#324;ski<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014, 2015 Andrzej Krzemie&#324;ski<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>
diff --git a/libs/optional/doc/html/boost_optional/tutorial/exception_safety_guarantees.html b/libs/optional/doc/html/boost_optional/tutorial/exception_safety_guarantees.html
index ea3fa8f5e..dfa34c85c 100644
--- a/libs/optional/doc/html/boost_optional/tutorial/exception_safety_guarantees.html
+++ b/libs/optional/doc/html/boost_optional/tutorial/exception_safety_guarantees.html
@@ -161,7 +161,7 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014 Andrzej Krzemie&#324;ski<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014, 2015 Andrzej Krzemie&#324;ski<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>
diff --git a/libs/optional/doc/html/boost_optional/tutorial/in_place_factories.html b/libs/optional/doc/html/boost_optional/tutorial/in_place_factories.html
index d6907b9e3..4cfef3256 100644
--- a/libs/optional/doc/html/boost_optional/tutorial/in_place_factories.html
+++ b/libs/optional/doc/html/boost_optional/tutorial/in_place_factories.html
@@ -183,7 +183,7 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014 Andrzej Krzemie&#324;ski<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014, 2015 Andrzej Krzemie&#324;ski<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>
diff --git a/libs/optional/doc/html/boost_optional/tutorial/io_operators.html b/libs/optional/doc/html/boost_optional/tutorial/io_operators.html
new file mode 100644
index 000000000..8443a4922
--- /dev/null
+++ b/libs/optional/doc/html/boost_optional/tutorial/io_operators.html
@@ -0,0 +1,87 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
+<title>IO operators</title>
+<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
+<link rel="home" href="../../index.html" title="Boost.Optional">
+<link rel="up" href="../../optional/tutorial.html" title="Tutorial">
+<link rel="prev" href="relational_operators.html" title="Relational operators">
+<link rel="next" href="optional_references.html" title="Optional references">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr>
+<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td>
+<td align="center"><a href="../../../../../../index.html">Home</a></td>
+<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td>
+<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
+<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
+<td align="center"><a href="../../../../../../more/index.htm">More</a></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="relational_operators.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="optional_references.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_optional.tutorial.io_operators"></a><a class="link" href="io_operators.html" title="IO operators">IO operators</a>
+</h3></div></div></div>
+<p>
+        It is possible to use <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span></code>
+        with IO streams, provided that <code class="computeroutput"><span class="identifier">T</span></code>
+        can be used with streams. IOStream operators are defined in a separate header.
+      </p>
+<p>
+</p>
+<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
+<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">optional</span><span class="special">/</span><span class="identifier">optional_io</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
+
+<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
+<span class="special">{</span>
+  <span class="identifier">boost</span><span class="special">::</span><span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">o1</span> <span class="special">=</span> <span class="number">1</span><span class="special">,</span> <span class="identifier">oN</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">none</span><span class="special">;</span>
+  <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">o1</span><span class="special">;</span>
+  <span class="identifier">std</span><span class="special">::</span><span class="identifier">cin</span> <span class="special">&gt;&gt;</span> <span class="identifier">oN</span><span class="special">;</span>
+<span class="special">}</span>
+</pre>
+<p>
+      </p>
+<p>
+        The current implementation does not guarantee any particular output. What
+        it guarantees is that if streaming out and then back in <code class="computeroutput"><span class="identifier">T</span></code>
+        gives the same value, then streaming out and then back in <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span></code>
+        will also give back the same result:
+      </p>
+<p>
+</p>
+<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">cassert</span><span class="special">&gt;</span>
+<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">sstream</span><span class="special">&gt;</span>
+<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">optional</span><span class="special">/</span><span class="identifier">optional_io</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
+
+<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
+<span class="special">{</span>
+  <span class="identifier">boost</span><span class="special">::</span><span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">o1</span> <span class="special">=</span> <span class="number">1</span><span class="special">,</span> <span class="identifier">oN</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">none</span><span class="special">;</span>
+  <span class="identifier">boost</span><span class="special">::</span><span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">x1</span><span class="special">,</span> <span class="identifier">x2</span><span class="special">;</span>
+  <span class="identifier">std</span><span class="special">::</span><span class="identifier">stringstream</span> <span class="identifier">s</span><span class="special">;</span>
+  <span class="identifier">s</span> <span class="special">&lt;&lt;</span> <span class="identifier">o1</span> <span class="special">&lt;&lt;</span> <span class="identifier">oN</span><span class="special">;</span>
+  <span class="identifier">s</span> <span class="special">&gt;&gt;</span> <span class="identifier">x1</span> <span class="special">&gt;&gt;</span> <span class="identifier">x2</span><span class="special">;</span>
+  <span class="identifier">assert</span> <span class="special">(</span><span class="identifier">o1</span> <span class="special">==</span> <span class="identifier">x1</span><span class="special">);</span>
+  <span class="identifier">assert</span> <span class="special">(</span><span class="identifier">oN</span> <span class="special">==</span> <span class="identifier">x2</span><span class="special">);</span>
+<span class="special">}</span>
+</pre>
+<p>
+      </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014, 2015 Andrzej Krzemie&#324;ski<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="relational_operators.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="optional_references.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>
diff --git a/libs/optional/doc/html/boost_optional/tutorial/optional_references.html b/libs/optional/doc/html/boost_optional/tutorial/optional_references.html
index 4e067c2d9..13209411f 100644
--- a/libs/optional/doc/html/boost_optional/tutorial/optional_references.html
+++ b/libs/optional/doc/html/boost_optional/tutorial/optional_references.html
@@ -6,7 +6,7 @@
 <meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
 <link rel="home" href="../../index.html" title="Boost.Optional">
 <link rel="up" href="../../optional/tutorial.html" title="Tutorial">
-<link rel="prev" href="relational_operators.html" title="Relational operators">
+<link rel="prev" href="io_operators.html" title="IO operators">
 <link rel="next" href="rebinding_semantics_for_assignment_of_optional_references.html" title="Rebinding semantics for assignment of optional references">
 </head>
 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
@@ -20,7 +20,7 @@
 </tr></table>
 <hr>
 <div class="spirit-nav">
-<a accesskey="p" href="relational_operators.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="rebinding_semantics_for_assignment_of_optional_references.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+<a accesskey="p" href="io_operators.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="rebinding_semantics_for_assignment_of_optional_references.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
 </div>
 <div class="section">
 <div class="titlepage"><div><div><h3 class="title">
@@ -101,7 +101,7 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014 Andrzej Krzemie&#324;ski<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014, 2015 Andrzej Krzemie&#324;ski<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>
@@ -109,7 +109,7 @@
 </tr></table>
 <hr>
 <div class="spirit-nav">
-<a accesskey="p" href="relational_operators.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="rebinding_semantics_for_assignment_of_optional_references.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+<a accesskey="p" href="io_operators.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="rebinding_semantics_for_assignment_of_optional_references.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
 </div>
 </body>
 </html>
diff --git a/libs/optional/doc/html/boost_optional/tutorial/performance_considerations.html b/libs/optional/doc/html/boost_optional/tutorial/performance_considerations.html
new file mode 100644
index 000000000..2e2d4ca72
--- /dev/null
+++ b/libs/optional/doc/html/boost_optional/tutorial/performance_considerations.html
@@ -0,0 +1,223 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
+<title>Performance considerations</title>
+<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
+<link rel="home" href="../../index.html" title="Boost.Optional">
+<link rel="up" href="../../optional/tutorial.html" title="Tutorial">
+<link rel="prev" href="type_requirements.html" title="Type requirements">
+<link rel="next" href="../../optional/reference.html" title="Reference">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr>
+<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td>
+<td align="center"><a href="../../../../../../index.html">Home</a></td>
+<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td>
+<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
+<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
+<td align="center"><a href="../../../../../../more/index.htm">More</a></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="type_requirements.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../../optional/reference.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_optional.tutorial.performance_considerations"></a><a class="link" href="performance_considerations.html" title="Performance considerations">Performance
+      considerations</a>
+</h3></div></div></div>
+<p>
+        Technical details aside, the memory layout 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 more-less this:
+      </p>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
+<span class="keyword">class</span> <span class="identifier">optional</span>
+<span class="special">{</span>
+  <span class="keyword">bool</span> <span class="identifier">_initialized</span><span class="special">;</span>
+  <span class="identifier">std</span><span class="special">::</span><span class="identifier">aligned_storage_t</span><span class="special">&lt;</span><span class="keyword">sizeof</span><span class="special">(</span><span class="identifier">t</span><span class="special">),</span> <span class="keyword">alignof</span><span class="special">(</span><span class="identifier">T</span><span class="special">)&gt;</span> <span class="identifier">_storage</span><span class="special">;</span>
+<span class="special">};</span>
+</pre>
+<p>
+        But for the purpose of this analysis, considering memory layouts, we can
+        think of it as:
+      </p>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
+<span class="keyword">class</span> <span class="identifier">optional</span>
+<span class="special">{</span>
+  <span class="keyword">bool</span> <span class="identifier">_initialized</span><span class="special">;</span>
+  <span class="identifier">T</span> <span class="identifier">_storage</span><span class="special">;</span>
+<span class="special">};</span>
+</pre>
+<p>
+        Given type <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span></code>, and
+        assuming that <code class="computeroutput"><span class="keyword">sizeof</span><span class="special">(</span><span class="keyword">int</span><span class="special">)</span> <span class="special">==</span>
+        <span class="number">4</span></code>, we will get <code class="computeroutput"><span class="keyword">sizeof</span><span class="special">(</span><span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;)</span>
+        <span class="special">==</span> <span class="number">8</span></code>.
+        This is so because of the alignment rules, for our two members we get the
+        following alignment:
+      </p>
+<p>
+        <span class="inlinemediaobject"><img src="../../images/opt_align1.png" alt="opt_align1"></span>
+      </p>
+<p>
+        This means you can fit twice as many <code class="computeroutput"><span class="keyword">int</span></code>s
+        as <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span></code>s into
+        the same space of memory. Therefore, if the size of the objects is critical
+        for your application (e.g., because you want to utilize your CPU cache in
+        order to gain performance) and you have determined you are willing to trade
+        the code clarity, it is recommended that you simply go with type <code class="computeroutput"><span class="keyword">int</span></code> and use some 'magic value' to represent
+        <span class="emphasis"><em>not-an-int</em></span>.
+      </p>
+<p>
+        Even if you cannot spare any value of <code class="computeroutput"><span class="keyword">int</span></code>
+        to represent <span class="emphasis"><em>not-an-int</em></span> (e.g., because every value is
+        useful, or you do want to signal <span class="emphasis"><em>not-an-int</em></span> explicitly),
+        at least for <code class="computeroutput"><span class="identifier">Trivial</span></code> types
+        you should consider storing the value and the <code class="computeroutput"><span class="keyword">bool</span></code>
+        flag representing the <span class="emphasis"><em>null-state</em></span> separately. Consider
+        the following class:
+      </p>
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">Record</span>
+<span class="special">{</span>
+  <span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">_min</span><span class="special">;</span>
+  <span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">_max</span><span class="special">;</span>
+<span class="special">};</span>
+</pre>
+<p>
+        Its memory layout can be depicted as follows:
+      </p>
+<p>
+        <span class="inlinemediaobject"><img src="../../images/opt_align2.png" alt="opt_align2"></span>
+      </p>
+<p>
+        This is exactly the same as if we had the following members:
+      </p>
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">Record</span>
+<span class="special">{</span>
+  <span class="keyword">bool</span> <span class="identifier">_has_min</span><span class="special">;</span>
+  <span class="keyword">int</span>  <span class="identifier">_min</span><span class="special">;</span>
+  <span class="keyword">bool</span> <span class="identifier">_has_max</span><span class="special">;</span>
+  <span class="keyword">int</span>  <span class="identifier">_max</span><span class="special">;</span>
+<span class="special">};</span>
+</pre>
+<p>
+        But when they are stored separately, we at least have an option to reorder
+        them like this:
+      </p>
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">Record</span>
+<span class="special">{</span>
+  <span class="keyword">bool</span> <span class="identifier">_has_min</span><span class="special">;</span>
+  <span class="keyword">bool</span> <span class="identifier">_has_max</span><span class="special">;</span>
+  <span class="keyword">int</span>  <span class="identifier">_min</span><span class="special">;</span>
+  <span class="keyword">int</span>  <span class="identifier">_max</span><span class="special">;</span>
+<span class="special">};</span>
+</pre>
+<p>
+        Which gives us the following layout (and smaller total size):
+      </p>
+<p>
+        <span class="inlinemediaobject"><img src="../../images/opt_align3.png" alt="opt_align3"></span>
+      </p>
+<p>
+        Sometimes it requires detailed consideration what data we make optional.
+        In our case above, if we determine that both minimum and maximum value can
+        be provided or not provided together, but one is never provided without the
+        other, we can make only one optional memebr:
+      </p>
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">Limits</span>
+<span class="special">{</span>
+  <span class="keyword">int</span>  <span class="identifier">_min</span><span class="special">;</span>
+  <span class="keyword">int</span>  <span class="identifier">_max</span><span class="special">;</span>
+<span class="special">};</span>
+
+<span class="keyword">struct</span> <span class="identifier">Record</span>
+<span class="special">{</span>
+  <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">Limits</span><span class="special">&gt;</span> <span class="identifier">_limits</span><span class="special">;</span>
+<span class="special">};</span>
+</pre>
+<p>
+        This would give us the following layout:
+      </p>
+<p>
+        <span class="inlinemediaobject"><img src="../../images/opt_align4.png" alt="opt_align4"></span>
+      </p>
+<h5>
+<a name="boost_optional.tutorial.performance_considerations.h0"></a>
+        <span class="phrase"><a name="boost_optional.tutorial.performance_considerations.optional_function_parameters"></a></span><a class="link" href="performance_considerations.html#boost_optional.tutorial.performance_considerations.optional_function_parameters">Optional
+        function parameters</a>
+      </h5>
+<p>
+        Having function parameters of type <code class="computeroutput"><span class="keyword">const</span>
+        <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;&amp;</span></code>
+        may incur certain unexpected run-time cost connected to copy construction
+        of <code class="computeroutput"><span class="identifier">T</span></code>. Consider the following
+        code.
+      </p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">fun</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">Big</span><span class="special">&gt;&amp;</span> <span class="identifier">v</span><span class="special">)</span>
+<span class="special">{</span>
+  <span class="keyword">if</span> <span class="special">(</span><span class="identifier">v</span><span class="special">)</span> <span class="identifier">doSomethingWith</span><span class="special">(*</span><span class="identifier">v</span><span class="special">);</span>
+  <span class="keyword">else</span>   <span class="identifier">doSomethingElse</span><span class="special">();</span>
+<span class="special">}</span>
+
+<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
+<span class="special">{</span>
+  <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">Big</span><span class="special">&gt;</span> <span class="identifier">ov</span><span class="special">;</span>
+  <span class="identifier">Big</span> <span class="identifier">v</span><span class="special">;</span>
+  <span class="identifier">fun</span><span class="special">(</span><span class="identifier">none</span><span class="special">);</span>
+  <span class="identifier">fun</span><span class="special">(</span><span class="identifier">ov</span><span class="special">);</span> <span class="comment">// no copy</span>
+  <span class="identifier">fun</span><span class="special">(</span><span class="identifier">v</span><span class="special">);</span>  <span class="comment">// copy constructor of Big</span>
+<span class="special">}</span>
+</pre>
+<p>
+        No copy elision or move semantics can save us from copying type <code class="computeroutput"><span class="identifier">Big</span></code> here. Not that we need any copy, but
+        this is how <code class="computeroutput"><span class="identifier">optional</span></code> works.
+        In order to avoid copying in this case, one could provide second overload
+        of <code class="computeroutput"><span class="identifier">fun</span></code>:
+      </p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">fun</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">Big</span><span class="special">&amp;</span> <span class="identifier">v</span><span class="special">)</span>
+<span class="special">{</span>
+  <span class="identifier">doSomethingWith</span><span class="special">(</span><span class="identifier">v</span><span class="special">);</span>
+<span class="special">}</span>
+
+<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
+<span class="special">{</span>
+  <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">Big</span><span class="special">&gt;</span> <span class="identifier">ov</span><span class="special">;</span>
+  <span class="identifier">Big</span> <span class="identifier">v</span><span class="special">;</span>
+  <span class="identifier">fun</span><span class="special">(</span><span class="identifier">ov</span><span class="special">);</span> <span class="comment">// no copy</span>
+  <span class="identifier">fun</span><span class="special">(</span><span class="identifier">v</span><span class="special">);</span>  <span class="comment">// no copy: second overload selected</span>
+<span class="special">}</span>
+</pre>
+<p>
+        Alternatively, you could consider using an optional reference instead:
+      </p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">fun</span><span class="special">(</span><span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="identifier">Big</span><span class="special">&amp;&gt;</span> <span class="identifier">v</span><span class="special">)</span> <span class="comment">// note where the reference is</span>
+<span class="special">{</span>
+  <span class="keyword">if</span> <span class="special">(</span><span class="identifier">v</span><span class="special">)</span> <span class="identifier">doSomethingWith</span><span class="special">(*</span><span class="identifier">v</span><span class="special">);</span>
+  <span class="keyword">else</span>   <span class="identifier">doSomethingElse</span><span class="special">();</span>
+<span class="special">}</span>
+
+<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
+<span class="special">{</span>
+  <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">Big</span><span class="special">&gt;</span> <span class="identifier">ov</span><span class="special">;</span>
+  <span class="identifier">Big</span> <span class="identifier">v</span><span class="special">;</span>
+  <span class="identifier">fun</span><span class="special">(</span><span class="identifier">none</span><span class="special">);</span>
+  <span class="identifier">fun</span><span class="special">(</span><span class="identifier">ov</span><span class="special">);</span> <span class="comment">// doesn't compile</span>
+  <span class="identifier">fun</span><span class="special">(</span><span class="identifier">v</span><span class="special">);</span>  <span class="comment">// no copy</span>
+<span class="special">}</span>
+</pre>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014, 2015 Andrzej Krzemie&#324;ski<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="type_requirements.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../../optional/reference.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>
diff --git a/libs/optional/doc/html/boost_optional/tutorial/rebinding_semantics_for_assignment_of_optional_references.html b/libs/optional/doc/html/boost_optional/tutorial/rebinding_semantics_for_assignment_of_optional_references.html
index 26bbf6600..a4c566ffc 100644
--- a/libs/optional/doc/html/boost_optional/tutorial/rebinding_semantics_for_assignment_of_optional_references.html
+++ b/libs/optional/doc/html/boost_optional/tutorial/rebinding_semantics_for_assignment_of_optional_references.html
@@ -135,7 +135,7 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014 Andrzej Krzemie&#324;ski<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014, 2015 Andrzej Krzemie&#324;ski<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>
diff --git a/libs/optional/doc/html/boost_optional/tutorial/relational_operators.html b/libs/optional/doc/html/boost_optional/tutorial/relational_operators.html
index bc97e7b72..31914272a 100644
--- a/libs/optional/doc/html/boost_optional/tutorial/relational_operators.html
+++ b/libs/optional/doc/html/boost_optional/tutorial/relational_operators.html
@@ -7,7 +7,7 @@
 <link rel="home" href="../../index.html" title="Boost.Optional">
 <link rel="up" href="../../optional/tutorial.html" title="Tutorial">
 <link rel="prev" href="when_to_use_optional.html" title="When to use Optional">
-<link rel="next" href="optional_references.html" title="Optional references">
+<link rel="next" href="io_operators.html" title="IO operators">
 </head>
 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
 <table cellpadding="2" width="100%"><tr>
@@ -20,7 +20,7 @@
 </tr></table>
 <hr>
 <div class="spirit-nav">
-<a accesskey="p" href="when_to_use_optional.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="optional_references.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+<a accesskey="p" href="when_to_use_optional.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="io_operators.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
 </div>
 <div class="section">
 <div class="titlepage"><div><div><h3 class="title">
@@ -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>:
@@ -99,7 +99,7 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014 Andrzej Krzemie&#324;ski<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014, 2015 Andrzej Krzemie&#324;ski<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>
@@ -107,7 +107,7 @@
 </tr></table>
 <hr>
 <div class="spirit-nav">
-<a accesskey="p" href="when_to_use_optional.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="optional_references.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+<a accesskey="p" href="when_to_use_optional.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="io_operators.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
 </div>
 </body>
 </html>
diff --git a/libs/optional/doc/html/boost_optional/tutorial/type_requirements.html b/libs/optional/doc/html/boost_optional/tutorial/type_requirements.html
index 38a106d16..12cc30a59 100644
--- a/libs/optional/doc/html/boost_optional/tutorial/type_requirements.html
+++ b/libs/optional/doc/html/boost_optional/tutorial/type_requirements.html
@@ -7,7 +7,7 @@
 <link rel="home" href="../../index.html" title="Boost.Optional">
 <link rel="up" href="../../optional/tutorial.html" title="Tutorial">
 <link rel="prev" href="exception_safety_guarantees.html" title="Exception Safety Guarantees">
-<link rel="next" href="../../optional/reference.html" title="Reference">
+<link rel="next" href="performance_considerations.html" title="Performance considerations">
 </head>
 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
 <table cellpadding="2" width="100%"><tr>
@@ -20,7 +20,7 @@
 </tr></table>
 <hr>
 <div class="spirit-nav">
-<a accesskey="p" href="exception_safety_guarantees.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../../optional/reference.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+<a accesskey="p" href="exception_safety_guarantees.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="performance_considerations.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
 </div>
 <div class="section">
 <div class="titlepage"><div><div><h3 class="title">
@@ -95,7 +95,7 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014 Andrzej Krzemie&#324;ski<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014, 2015 Andrzej Krzemie&#324;ski<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>
@@ -103,7 +103,7 @@
 </tr></table>
 <hr>
 <div class="spirit-nav">
-<a accesskey="p" href="exception_safety_guarantees.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../../optional/reference.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+<a accesskey="p" href="exception_safety_guarantees.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../optional/tutorial.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="performance_considerations.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
 </div>
 </body>
 </html>
diff --git a/libs/optional/doc/html/boost_optional/tutorial/when_to_use_optional.html b/libs/optional/doc/html/boost_optional/tutorial/when_to_use_optional.html
index 58834461d..fd27d8026 100644
--- a/libs/optional/doc/html/boost_optional/tutorial/when_to_use_optional.html
+++ b/libs/optional/doc/html/boost_optional/tutorial/when_to_use_optional.html
@@ -128,7 +128,7 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014 Andrzej Krzemie&#324;ski<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014, 2015 Andrzej Krzemie&#324;ski<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>