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<P id=heading-quote><SPAN class=quote>“...one of the most highly regarded and 
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      <DIV class=section id=news>
      <H2>Latest News</H2>
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	  <H3>May 14, 2007 - BoostCon'07 starts today</H3>
	  <P>The long anticipated <a href="http://www.boostcon.com">BoostCon'07</a> finally starts today. Promising to be the 
	  main face-to-face  event for all things Boost, BoostCon'07 opens the door to 
	  your C++ future. </P>
	  <H3>May 12, 2007 - 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><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><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><SPAN class=library><A href="doc/html/typeof.html">Typeof 
        Library</A>:</SPAN> Typeof operator emulation, from Arkadiy Vertleyb and 
        Peder Holt. 
        <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>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><SPAN class=library><A href="doc/html/date_time.html">Date_time 
        library</A>:</SPAN> 
        <UL>
          <LI>Support for new US/Canada timezone rules and other bug fixes. See 
          <A href="doc/hmtl/date_time/details.html#changes">Change History</A> 
          for details. </LI></UL>
        <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><A 
          href="libs/filesystem/doc/i18n.html#Simplification">Simplification</A> 
          of the path interface by eliminating special constructors to identify 
          native formats. 
          <LI><A 
          href="libs/filesystem/doc/i18n.html#Rationalization">Rationalization</A> 
          of predicate function design, including the addition of several new 
          functions. 
          <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><A 
          href="libs/filesystem/doc/i18n.html#Preservation">Preservation</A> of 
          existing user code whenever possible. 
          <LI><A href="libs/filesystem/doc/i18n.html#More_efficient">More 
          efficient</A> directory iteration. 
          <LI>Addition of a <A 
          href="libs/filesystem/doc/tr2_proposal.html#Class-template-basic_recursive_directory_iterator">recursive 
          directory iterator</A>. </LI></UL>
        <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 constructing 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><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>Deprecated the <TT>&lt;boost/functional/hash/*.hpp&gt;</TT> 
          headers. 
          <LI>Add support for the <TT>BOOST_HASH_NO_EXTENSIONS</TT> macro, which 
          disables the extensions to TR1 
          <LI>Minor improvements to the hash functions for floating point 
          numbers. </LI></UL>
        <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><A 
          href="libs/graph/doc/lengauer_tarjan_dominator.htm"><TT>lengauer_tarjan_dominator_tree</TT></A>, 
          from JongSoo Park. 
          <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><A 
          href="libs/graph/doc/sorted_erdos_renyi_gen.html"><TT>sorted_erdos_renyi_iterator</TT></A>, 
          from Jeremiah Willcock of Indiana University. 
          <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><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><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><B>Note:</B> the name of the compiled library for the <A 
          href="libs/graph/doc/read_graphviz.html">GraphViz reader</A> has 
          changed to <CODE>boost_graph</CODE> (from <CODE>bgl-viz</CODE>) to 
          match Boost conventions. 
          <LI>See the <A href="libs/graph/doc/history.html#1.34.0">complete 
          revision history</A> for more information. </LI></UL>
        <LI><SPAN class=library><A href="libs/multi_array/index.html">MultiArray 
        Library</A>:</SPAN> 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>. A bug in 
        <CODE>multi_array::resize()</CODE> related to storage orders was fixed. 
        <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>Non key-based indices feature new <A 
          href="libs/multi_index/doc/tutorial/indices.html#rearrange">rearrange 
          facilities</A>. 
          <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><SPAN class=library><A href="libs/optional/index.html">Optional 
        Library</A>:</SPAN> 
        <UL>
          <LI><CODE>boost::none_t and boost::none</CODE> now added to Optional's 
          documentation 
          <LI>Relational operators now directly support arguments of type 
          <CODE>'T'</CODE> and <CODE>'none_t'</CODE> 
          <LI>operator-&gt;() now also works with reference types. 
          <LI>Helper functions <CODE>make_optional(val), make_optional(cond,val) 
          and get_optional_value_or(opt,alternative_value)</CODE> added. 
          <LI>Constructor taking a boolean condition (as well as a value) added. 

          <LI>Member function <CODE>get_value_or(alternative_value)</CODE> 
          added. 
          <LI>Incompatbility bug with mpl::apply&lt;&gt; fixed. 
          <LI>Converting assignment bug with uninitialized lvalues fixed. 
        </LI></UL>
        <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>Support for unnamed arguments (those whose keyword is deduced from 
          their types) is added. 
          <LI>Support for named and unnamed template arguments is added. 
          <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>See also the Python library changes, below. </LI></UL>
        <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>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>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><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><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><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>Support for <CODE>void*</CODE> conversions is added. 
          <LI>Integrated support for wrapping C++ functions built with the 
          parameter library; keyword names are automatically known to 
          docsstrings. 
          <LI>Enhancements to the API for better embedding support 
          (<CODE>boost::python::import()</CODE>, 
          <CODE>boost::python::exec()</CODE>, and 
          <CODE>boost::python::exec_file()</CODE>). </LI></UL>
        <LI><SPAN class=library><A href="doc/html/signals.html">Signals 
        Library</A>:</SPAN> More improvements to signal invocation performance 
        from Robert Zeh. 
        <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><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><SPAN class=library><A 
        href="libs/algorithm/string/index.html">String Algorithm 
        Library</A>:</SPAN> 
        <UL>
          <LI><CODE>lexicographical_compare</CODE> 
          <LI><CODE>join</CODE> 
          <LI>New comparison predicates <CODE>is_less</CODE>, 
          <CODE>is_not_greater</CODE>. 
          <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/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>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>Shared library (dll) support has been added for the generated Wave 
          libraries. 
          <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>Support for optional comment and/or full whitespace preservation 
          in the generated output stream has been added. 
          <LI>The Wave library now performs automatic include guard detection to 
          avoid accessing header files more than once, if appropriate. 
          <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>The overall performance has been improved by upto 40-60%, 
          depending on the concrete files to process. 
          <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>Optional support for #pragma message "..." has been added. 
          <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>
      <H4>Supported Compilers</H4>
      <P>Boost is tested on a wide range of compilers and platforms. Since Boost 
      libraries rely on modern C++ features not available in all compilers, not 
      all Boost libraries will work with every compiler. The following compilers 
      and platforms have been extensively tested with Boost, although many other 
      compilers and platforms will work as well. For more information, see the 
      <A href="http://www.boost.org/regression/release/user/">regression test 
      results</A>.</P>
      <UL>
        <LI><A href="http://developer.apple.com/">Apple GCC</A> 4.0.1 on Mac OS 
        X. 
        <LI><A href="http://www.borland.com/us/products/cbuilder/">Borland 
        C++</A> 5.8.2 on Windows. 
        <LI><A href="http://gcc.gnu.org/">GNU C++</A> 
        <UL>
          <LI>3.2.x., 3.3.x, 3.4.x, 4.0.x, 4.1.x on Linux 
          <LI>4.1.x on Solaris 
          <LI>3.4.x on Windows </LI></UL>
        <LI><A href="http://h30097.www3.hp.com/cplus/">HP aC++ A.06.14</A>. 
        <LI><A 
        href="http://www.intel.com/cd/software/products/asmo-na/eng/compilers/index.htm">Intel 
        C++</A> 9.1 on Windows, 9.0 on Linux. 
        <LI><A href="http://www.metrowerks.com/">Metrowerks CodeWarrior</A> 9.4 
        on Windows. 
        <LI><A href="http://msdn.microsoft.com/visualc/">Microsoft Visual 
        C++</A> 6.0 (sp5, with and without STLport), 7.0, 7.1, 8.0. Note: Boost 
        does not support the non-standard "Safe" C++ Library shipping with 
        Visual C++ 8.0, which may result in many spurious warnings from Boost 
        headers and other standards-conforming C++ code. To suppress these 
        warnings, define the macro <CODE>_SCL_SECURE_NO_DEPRECATE</CODE>. 
        <LI><A 
        href="http://developers.sun.com/sunstudio/compilers_index.html">Sun 
        Studio 11</A> on Solaris. </LI></UL>
      <H4>Acknowledgements</H4>
      <P><A href="people/thomas_witt.html">Thomas Witt</A> managed this 
      release.</P>
      <P>A great number of people contributed their time and expertise to make 
      this release possible. Special thanks go to Vladimir Prus for making 
      Boost.Build version 2 a reality, David Abrahams for authoring a new 
      Getting Started guide, Rene Rivera for general build and installation 
      support and Greg D. for answering countless 
      questions.</P></DIV></DIV></DIV></DIV>
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