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                  <h3>??? - Version 1.33.0</h3>

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                    polymorphic objects to ease OO-programming, from Thorsten
                    Ottosen.</li>

                    <li><span class="library"><a href=
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                    conformant implementation of the mandated C99/C++
                    preprocessor functionality packed behind an easy to use
                    iterator interface, from Hartmut&nbsp;Kaiser.</li>
                  </ul>

                  <h4>Updated Libraries</h4>

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                        time zone classes</a>.</li>

                        <li>Added <a href=
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                        Input/Output facets</a>.</li>

                        <li>For a complete list of changes, see the library
                        <a href=
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                        history</a>.</li>
                      </ul>
                    </li>

                    <li>
                      <span class="library"><a href=
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                      Introduced several new algorithms and improved existing
                      algorithms:

                      <ul>
                        <li><a href="libs/graph/doc/python.html">Experimental
                        Python bindings</a>, from Doug Gregor and Indiana
                        University.</li>

                        <li><a href=
                        "libs/graph/doc/floyd_warshall_shortest.html"><tt>floyd
                        warshall all pairs shortest paths</tt></a>, from
                        Lauren Foutz and Scott Hill.</li>

                        <li><a href=
                        "libs/graph/doc/astar_search.html"><tt>astar
                        search</tt></a>, from Kristopher Beevers and Jufeng
                        Peng.</li>

                        <li><a href=
                        "libs/graph/doc/fruchterman_reingold.html"><tt>fruchterman
                        reingold force directed layout</tt></a>, from Doug
                        Gregor and Indiana University.</li>

                        <li><a href=
                        "libs/graph/doc/biconnected_components.html"><tt>biconnected
                        components</tt> and <tt>articulation points</tt></a>,
                        from Jeremy Siek, Janusz Piwowarski, and Doug
                        Gregor.</li>

                        <li><a href=
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                        vertex coloring</tt></a> has been updated, tested,
                        and documented.</li>

                        <li><a href=
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                        atun layout</tt></a>, from Jeremiah Willcock and Doug
                        Gregor of Indiana University.</li>

                        <li><a href=
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                        ordering</tt></a>, from D. Kevin McGrath of Indiana
                        University.</li>

                        <li><a href=
                        "libs/graph/doc/cuthill_mckee_ordering.html"><tt>cuthill
                        mckee ordering</tt></a> has been recast as an
                        invocation of <tt>breadth first search</tt> and now
                        supports graphs with multiple components.</li>

                        <li><a href=
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                        shortest paths</tt></a> now uses a relaxed
                        heap&nbsp;[<a href=
                        "libs/graph/doc/bibliography.html#driscoll88">61</a>]
                        as its priority queue, improving its complexity to
                        <em>O(V log V)</em> and improving real-world
                        performance for larger graphs.</li>

                        <li><a href=
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                        graphviz</code></a> now has a new, Spirit-based
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                        The old, Bison-based GraphViz reader has been
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                        <code>subgraph</code></a>:
                        <code>get_property</code> now refers to the
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                        property.</li>
                        
                        <li>See the <a href=
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                        for additional changes and bug fixes.</li>
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                        <li>Added <a href=
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                        <li>Option descriptions are now printed with word
                        wrapping.</li>

                        <li>Command line parser can bypass unregistered
                        options, instread of throwing.</li>

                        <li>Removed support for "implicit" (optional)
                        values.</li>

                        <li>New customization method
                        'command_line_parser::extra_style_parser'. Unlike
                        'additional_parser', allows the user to parse several
                        tokens and return a vector of options, not just a
                        single option.</li>

                        <li>Work with disabled exceptions.</li>
                      </ul>
                    </li>

                    <li><span class="library"><a href=
                    "libs/property_map/property_map.html">Property Map
                    Library</a>:</span> Introduced the <a href=
                    "libs/property_map/doc/dynamic_property_map.html"><code>dynamic
                    properties</code></a> class, which provides
                    dynamically-typed access to a set of property maps.</li>

                    <li><span class="library"><a href="libs/random/index.html">
                    Random Numbers</a>:</span> improved initialization for
                    <code>mersenne_twister</code>, algorithm by Makoto
                    Matsumoto and Takuji Nishimura, implemented for Boost by
                    Jens Maurer.<br>
                    <em>Note:</em> All test vectors for
                    <code>mersenne_twister</code>s constructed or seeded
                    without parameters or with a single
                    <code>unsigned int</code> parameter become invalid.</li>

                    <li><span class="library"><a href=
                    "libs/range/index.html">Range Library</a>:</span> Minor
                    addition of convenience functions to <code>iterator
                    range</code> like <code>front(), back()</code> and
                    <code>operator[]()</code>.</li>

                    <li>
                      <span class="library"><a href=
                      "libs/regex/index.html">Regex Library</a>:</span>

                      <ul>
                        <li>Rewritten front end parser now supports
                        (?imsx-imsx) constructs, plus lookbehind assertions
                        and conditional expressions.</li>

                        <li>Thin wrapper classes improve integration with
                        MFC/ATL code.</li>

                        <li>Full (optional) Unicode support via the ICU
                        library.</li>
                      </ul>Refer to the <a href=
                      "libs/regex/doc/history.html">regex history page</a>
                      for more information on these and other small changes.
                    </li>

                    <li><span class="library"><a href=
                    "doc/html/signals.html">Signals Library</a>:</span> added
                    slot blocking/unblocking, from Frantz Maerten. Huge
                    improvements to signal invocation performance from Robert
                    Zeh.</li>
                  </ul>

                  <h4>Acknowledgements</h4>

                  <p><img src="more/boost_1_33_0.jpg" width="128" height=
                  "118" alt="Medieval Mr. Gregor" class=
                  "left-inset" /><a href="people/doug_gregor.html">Douglas
                  Gregor</a> managed this release.</p>
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