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                        <p>We emphasize libraries that work well with the C++
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                        <p>Although Boost was begun by members of the C++
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                  <h2>Latest News</h2>

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                      <div class="section-body-1">
                        <h3>???, 2006 - Version 1.34.0</h3>

                        <h4>New Libraries</h4>

                        <ul>
                          <li><span class="library"><a href=
                          "doc/html/foreach.html">Foreach Library</a>:</span>
                          <tt>BOOST_FOREACH</tt> macro for easily iterating
                          over the elements of a sequence, from Eric
                          Niebler.</li>

                          <li><span class="library"><a href=
                          "libs/statechart/doc/index.html">Statechart 
                          Library</a>:</span> Arbitrarily complex finite state
                          machines can be implemented in easily readable and
                          maintainable C++ code, from Andreas Huber.</li>

                          <li><span class="library"><a href=
                          "libs/tr1/index.html">TR1 Library</a>:</span> An
                          implementation of the C++ Technical Report on
                          Standard Library Extensions, from John Maddock.
                          This library does not itself implement the TR1
                          components, rather it's a thin wrapper that will
                          include your standard library's TR1 implementation
                          (if it has one), otherwise it will include the
                          Boost Library equivalents, and import them into
                          namespace <code>std::tr1</code>. Highlights
                          include: Reference Wrappers, Smart Pointers,
                          result_of, Function Object Binders, Polymorphic
                          function wrappers, Type Traits, Random Number
                          Generators and Distributions, Tuples, Fixed Size
                          Array, Hash Function Objects, Regular Expressions,
                          and Complex Number Additional Algorithms.</li>

                          <li><span class="library"><a href=
                          "doc/html/typeof.html">Typeof 
                          Library</a>:</span> Typeof operator emulation, 
                          from Arkadiy Vertleyb and Peder Holt.</li>

                          <li><span class="library"><a href=
                          "doc/html/xpressive.html">Xpressive
                          Library</a>:</span> Regular expressions that can be
                          written as strings or as expression templates, and
                          that can refer to each other and themselves
                          recursively with the power of context-free
                          grammars, from Eric Niebler.</li>
                        </ul>

                        <h4>Updated Libraries</h4>

                        <ul>
                          <li>
                            <span class="library"><a href=
                            "libs/assign/index.html">Assign
                            Library</a>:</span>

                            <ul>
                              <li>Support for
                              <code>ptr_map&lt;key,T&gt;</code> via the new
                              function <code>ptr_map_insert()</code></li>

                              <li>Support for initialization of <a href=
                              "libs/ptr_container/index.html">Pointer
                              Containers</a> when the containers hold
                              pointers to an abstract base class.</li>
                            </ul>
                          </li>

                          <li>
                            <span class="library"><a href=
                            "libs/filesystem/doc/index.htm">Filesystem
                            Library</a>:</span> Major upgrade in preparation
                            for submission to the C++ Standards Committee for
                            TR2. Changes include:

                            <ul>
                              <li><a href=
                              "libs/filesystem/doc/i18n.html#Internationalization">
                              Internationalization</a>, provided by class
                              templates <i>basic_path</i>,
                              <i>basic_filesystem_error</i>,
                              <i>basic_directory_iterator</i>, and
                              <i>basic_directory_entry</i>.</li>

                              <li><a href=
                              "libs/filesystem/doc/i18n.html#Simplification">Simplification</a>
                              of the path interface by eliminating special
                              constructors to identify native formats.</li>

                              <li><a href=
                              "libs/filesystem/doc/i18n.html#Rationalization">
                              Rationalization</a> of predicate function
                              design, including the addition of several new
                              functions.</li>

                              <li>Clearer specification by reference to
                              <a href=
                              "libs/filesystem/doc/design.htm#POSIX-01">POSIX</a>,
                              the ISO/IEEE Single Unix Standard, with
                              provisions for Windows and other operating
                              systems.</li>

                              <li><a href=
                              "libs/filesystem/doc/i18n.html#Preservation">Preservation</a>
                              of existing user code whenever possible.</li>

                              <li><a href=
                              "libs/filesystem/doc/i18n.html#More_efficient">More
                              efficient</a> directory iteration.</li>

                              <li>Addition of a <a href=
                              "libs/filesystem/doc/convenience.htm#basic_recursive_directory_iterator">
                              recursive directory iterator</a>.</li>
                            </ul>
                          </li>

                          <li><span class="library"><a href=
                          "libs/function/index.html">Function
                          Library</a>:</span> Boost.Function now implements a
                          small buffer optimization, which can drastically
                          improve the performance when copying or
                          construction Boost.Function objects storing small
                          function objects. For instance,
                          <code>bind(&amp;X:foo, &amp;x, _1, _2)</code>
                          requires no heap allocation when placed into a
                          Boost.Function object.</li>

                          <li>
                            <span class="library"><a href=
                            "libs/functional/hash/index.html">Functional/Hash
                            Library</a></span>

                            <ul>
                              <li>Use declarations for standard classes, so
                              that the library doesn't need to include all of
                              their headers</li>

                              <li>Deprecated the
                              <tt>&lt;boost/functional/hash/*.hpp&gt;</tt>
                              headers.</li>

                              <li>Add support for the
                              <tt>BOOST_HASH_NO_EXTENSIONS</tt> macro, which
                              disables the extensions to TR1</li>

                              <li>Minor improvements to the hash functions
                              for floating point numbers.</li>
                            </ul>
                          </li>

                          <li>
                            <span class="library"><a href=
                            "libs/graph/doc/index.html">Graph
                            Library</a>:</span>

                            <ul>
                              <li><a href=
                              "libs/graph/doc/maximum_matching.html"><tt>edmonds_maximum_cardinality_matching</tt></a>,
                              from Aaron Windsor.</li>

                              <li><a href=
                              "libs/graph/doc/lengauer_tarjan_dominator_tree.htm">
                              <tt>lengauer_tarjan_dominator_tree</tt></a>,
                              from JongSoo Park.</li>

                              <li><a href=
                              "libs/graph/doc/compressed_sparse_row.html"><tt>
                              compressed_sparse_row_graph</tt></a>, from
                              Jeremiah Willcock and Douglas Gregor of Indiana
                              University.</li>

                              <li><a href=
                              "sorted_erdos_renyi_generator.html"><tt>sorted_erdos_renyi_iterator</tt></a>,
                              from Jeremiah Willcock of Indiana
                              University.</li>

                              <li><a href=
                              "libs/graph/doc/biconnected_components.html"><tt>
                              biconnected_components</tt></a> now supports a
                              visitor and named parameters, from Janusz
                              Piwowarski.</li>

                              <li><a href=
                              "libs/graph/doc/adjacency_matrix.html"><tt>adjacency_matrix</tt></a>
                              now models the <a href=
                              "libs/graph/doc/BidirectionalGraph.html">Bidirectional
                              Graph</a> concept.</li>

                              <li><a href=
                              "libs/graph/doc/dijkstra_shortest_paths.html"><tt>
                              dijkstra_shortest_paths</tt></a> now calls
                              <tt>vis.initialize_vertex</tt> for each vertex
                              during initialization.</li>

                              <li>See the <a href=
                              "libs/graph/doc/history.html#1.34.0">complete
                              revision history</a> for more information.</li>
                            </ul>
                          </li>

                          <li><span class="library"><a href=
                          "libs/multi_array/index.html">MultiArray
                          Library</a>:</span> 
                <ul>
                  <li>Boost.MultiArray now by default
                              provides range-checking for
                  <code>operator[]</code>. Range checking can be
                  disabled by defining the macro
                  <code>BOOST_DISABLE_ASSERTS</code> before 
                  including <tt>multi_array.hpp</tt>.</li> 

                  <li> A bug in
                  <code>multi_array::resize()</code> related
                  to storage orders was fixed.</li>

                  <li><code>multi_array::resize()</code>
                  can now be called with a model of
                  the <code>Collection</code> concept to
                  specify the new extents.</li>

                  <li>A bug in the comparison routine for
                  view iterators was fixed.</li>
                </ul>
                          </li>

                          <li>
                            <span class="library"><a href=
                            "libs/multi_index/doc/index.html">Multi-index
                            Containers Library</a>:</span>

                            <ul>
                              <li>New <a href=
                              "libs/multi_index/doc/tutorial/indices.html#rnd_indices">
                              random access indices</a>.</li>

                              <li>Non key-based indices feature new <a href=
                              "libs/multi_index/doc/tutorial/indices.html#rearrange">
                              rearrange facilities</a>.</li>

                              <li>This version also includes a number of
                              optimizations and usage improvements. For a
                              complete list of changes, see the library
                              <a href=
                              "libs/multi_index/doc/release_notes.html#boost_1_34">
                              release notes</a>.</li>
                            </ul>
                          </li>

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

                            <ul>Added functionality:
                              <li><code>optional&lt;T&gt;::optional( bool condition, T v )</code></li>
                              <li><code>optional&lt;T&gt; make_optional( bool condition, T v )</code></li>
                              <li><code>T optional&lt;T&gt;::get_value_or( T default )</code></li> 
                              <li><code> T get_optional_value_or ( optional&lt;T&gt; o, T default )</code></li>
                            </ul>
                          </li>
                          
                          <li>
                            <span class="library"><a href=
                            "libs/parameter/index.html">Parameter
                            Library</a>:</span>

                            <ul>
                              <li>Every ArgumentPack is now a valid <a href=
                              "libs/mpl/doc/refmanual/forward-sequence.html">MPL
                              Forward Sequence.</a></li>

                              <li>Support for unnamed arguments (those whose
                              keyword is deduced from their types) is
                              added.</li>

                              <li>Support for named and unnamed template
                              arguments is added.</li>

                              <li>New overload generation macros solve the
                              <a href=
                              "http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2002/n1385.htm">
                              forwarding problem</a> directly.</li>

                              <li>See also the Python library changes,
                              below.</li>
                            </ul>
                          </li>

                          <li>
                            <span class="library"><a href=
                            "libs/ptr_container/index.html">Pointer Container
                            Library</a>:</span>

                            <ul>
                              <li>Support for serialization via <a href=
                              "libs/serialization/index.html">Boost.Serialization.</a></li>

                              <li>Exceptions can be disabled by defining the
                              macro BOOST_PTR_CONTAINER_NO_EXCEPTIONS before
                              including any header. This macro is defined by
                              default if BOOST_NO_EXCEPTIONS is defined.</li>

                              <li>Additional
                              <code>std::auto_ptr&lt;T&gt;</code> overloads
                              added s.t. one can also pass
                              <code>std::auto_ptr&lt;T&gt;</code> instead of
                              only <code>T*</code> arguments to member
                              functions.</li>

                              <li><code>transfer()</code> now has weaker
                              requirements s.t. one can transfer objects from
                              <code>ptr_container&lt;Derived&gt;</code> to
                              <code>ptr_container&lt;Base&gt;</code>,</li>
                            </ul>
                          </li>

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

                            <ul>
                              <li>Boost.Python now automatically appends C++
                              signatures to docstrings. The new <a href=
                              "libs/python/doc/v2/docstring_options.html"><code>
                              docstring_options.hpp</code></a> header is
                              available to control the content of
                              docstrings.</li>

                              <li><a href=
                              "libs/python/doc/v2/stl_iterator.html#stl_input_iterator-spec">
                              <code>stl_input_iterator</code></a>, for
                              turning a Python iterable object into an STL
                              input iterator, from Eric Niebler.</li>

                              <li>Support for <code>void*</code> conversions
                              is added.</li>

                              <li>Integrated support for wrapping C++
                              functions built with the parameter library;
                              keyword names are automatically known to
                              docsstrings.</li>
                            </ul>
                          </li>

                          <li>
                            <span class="library"><a href=
                            "libs/smart_ptr/smart_ptr.htm">Smart
                            Pointers Library</a>:</span>

                            <ul>
                              <li><a href=
                              "libs/smart_ptr/shared_ptr.htm#allocator_constructor">
                              Allocator support</a> as proposed in <a href=
                              "http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1851.pdf">
                              N1851</a> (162 Kb PDF).</li>

                              <li><a href=
                              "libs/smart_ptr/pointer_cast.html">
                              <code>pointer_cast</code></a> and <a href=
                              "libs/smart_ptr/pointer_to_other.html">
                              <code>pointer_to_other</code></a> utilities to
                              allow pointer-independent code, from Ion
                              Gaztanaga.</li>
                            </ul>
                          </li>

                          <li>
                              <span class="library"><a href="libs/algorithm/string/index.html">
                               String Algorithm Library</a>:<span>

                            <ul>
                                <li><code>lexicographical_compare</code></li>
                                <li><code>join</code></li>
                                <li>
                                    New comparison predicates <code>is_less</code>, <code>is_not_greater</code>.
                                </li>
                                <li>
                                    Negative indexes support (like Perl) in various algorihtms
                                    (<code>*_head/tail</code>, <code>*_nth</code>).
                                </li>                                        
                            </ul>                          
                          <li>
                            <span class="library"><a href=
                            "libs/wave/doc/index.html">Wave
                            Library</a>:</span>

                            <ul>
                              <li>Wave now correctly recognizes pp-number
                              tokens as mandated by the C++ Standard, which
                              are converted to C++ tokens right before they
                              are returned from the library.</li>

                              <li>Several new preprocessing hooks have been
                              added. For a complete description please refer
                              to the related documentation page: <a href=
                              "libs/wave/doc/class_reference_ctxpolicy.html">The
                              Context Policy</a>.</li>

                              <li>Shared library (dll) support has been added
                              for the generated Wave libraries.</li>

                              <li>The overall error handling has been
                              improved. It is now possible to recover and
                              continue after an error or a warning was
                              issued.</li>

                              <li>Support for optional comment and/or full
                              whitespace preservation in the generated output
                              stream has been added.</li>

                              <li>The Wave library now performs automatic 
                              include guard detection to avoid accessing header 
                              files more than once, if appropriate. </li>
                              
                              <li>Full interactive mode has been added to the Wave 
                              tool. Now the Wave tool can be used just like Python 
                              or Perl for instance to interactively try out your 
                              BOOST_PP macros. Additionally it is now possible to 
                              load and save the current state of an interactive session 
                              (macro tables et.al.).</li>

                              <li>The overall performance has been improved by upto 
                              30-40%, depending on the concrete files to process. </li>

                              <li>Support for new pragmas has been added allowing to 
                               control certain library features from inside the 
                               preprocessed sources (partial output redirection, 
                               control of generated whitespace and #line directives).</li>

                              <li>Optional support for #pragma message &quot;...&quot; 
                               has been added. </li>
                              <li>This version also includes a number of bug
                              fixes and usage improvements. For a complete
                              list of changes, see the libraries <a href=
                              "libs/wave/ChangeLog">change log</a>.</li>
                            </ul>
                          </li>
                        </ul>
                      </div>
                    </div>
                  </div>
                </div>

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