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??? - Version 1.33.0

New Libraries

• iostreams: Framework for defining streams, stream buffers and i/o filters, from Jonathan Turkanis.
• functional/hash: A TR1 hash function object that can be extended to hash user defined types, from Daniel James.
• Pointer Container Library: Containers for storing heap-allocated polymorphic objects to ease OO-programming, from Thorsten Ottosen.
• Wave: Standards conformant implementation of the mandated C99/C++ preprocessor functionality packed behind an easy to use iterator interface, from Hartmut Kaiser.

Updated Libraries

• Assignment Library: Support for Pointer Container Library and new efficient functions ref_list_of() and cref_list_of() for generating anonymous ranges.
• Date-Time Library:
  • Added local time and time zone classes.
  • Added format-based Input/Output facets.
  • For a complete list of changes, see the library change history.
• Graph Library: Introduced several new algorithms and improved existing algorithms:
  • Experimental Python bindings, from Doug Gregor and Indiana University.
  • floyd warshall all pairs shortest paths, from Lauren Foutz and Scott Hill.
  • astar search, from Kristopher Beevers and Jufeng Peng.
  • fruchterman reingold force directed layout, from Doug Gregor and Indiana University.
  • biconnected components and articulation points, from Jeremy Siek, Janusz Piwowarski, and Doug Gregor.
  • sequential vertex coloring has been updated, tested, and documented.
  • gursoy atun layout, from Jeremiah Willcock and Doug Gregor of Indiana University.
  • king ordering, from D. Kevin McGrath of Indiana University.
  • cuthill mckee ordering has been recast as an invocation of breadth first search and now supports graphs with multiple components.
  • dijkstra shortest paths now uses a relaxed heap [61] as its priority queue, improving its complexity to O(V log V) and improving real-world performance for larger graphs.
  • read graphviz now has a new, Spirit-based parser that works for all graph types and supports arbitrary properties on the graph, from Ron Garcia. The old, Bison-based GraphViz reader has been deprecated and will be removed in a future Boost release. write graphviz also supports dynamic properties.
  • subgraph: get_property now refers to the subgraph property, not the root graph's property.
  • See the history for additional changes and bug fixes.
• Multi-index Containers Library:
  • New hashed indices.
  • Added serialization support.
  • For a complete list of changes, see the library release notes.
• Program options library:
  • Option descriptions are now printed with word wrapping.
  • Command line parser can bypass unregistered options, instread of throwing.
  • Removed support for "implicit" (optional) values.
  • 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.
  • Work with disabled exceptions.
• Property Map Library: Introduced the dynamic properties class, which provides dynamically-typed access to a set of property maps.
• Random Numbers: improved initialization for mersenne_twister, algorithm by Makoto Matsumoto and Takuji Nishimura, implemented for Boost by Jens Maurer.
  Note: All test vectors for mersenne_twisters constructed or seeded without parameters or with a single unsigned int parameter become invalid.
• Range Library: Minor addition of convenience functions to iterator range like front(), back() and operator[]().
• Regex Library:
  • Rewritten front end parser now supports (?imsx-imsx) constructs, plus lookbehind assertions and conditional expressions.
  • Thin wrapper classes improve integration with MFC/ATL code.
  • Full (optional) Unicode support via the ICU library.
  Refer to the regex history page for more information on these and other small changes.
• Signals Library: added slot blocking/unblocking, from Frantz Maerten. Huge improvements to signal invocation performance from Robert Zeh.

Acknowledgements

Douglas Gregor managed this release.