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-Boost 1.34.0, the latest version of peer-reviewed, portable C++
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-libraries, has been released. This release brings five new libraries
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-and extensive updates to existing libraries.
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-
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-New Libraries
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-
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- * Foreach Library:
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- BOOST_FOREACH macro for easily iterating over the elements of a
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- sequence, from Eric Niebler.
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- * Statechart Library:
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- Arbitrarily complex finite state machines can be implemented in
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- easily readable and maintainable C++ code, from Andreas Huber.
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- * TR1 Library:
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- An implementation of the C++ Technical Report on Standard Library
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- Extensions, from John Maddock.
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- This library does not itself implement the TR1 components, rather
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- it's a thin wrapper that will include your standard library's TR1
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- implementation (if it has one), otherwise it will include the Boost
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- Library equivalents, and import them into namespace std::tr1. Highlights
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- include: Reference Wrappers, Smart Pointers, result_of,
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- Function Object Binders, Polymorphic function wrappers, Type Traits,
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- Random Number Generators and Distributions, Tuples, Fixed Size Array,
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- Hash Function Objects, Regular Expressions and
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- Complex Number Additional Algorithms.
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- * Typeof Library:
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- Typeof operator emulation, from Arkadiy Vertleyb and Peder Holt.
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- * Xpressive Library:
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- Regular expressions that can be written as strings or as expression
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- templates, and that can refer to each other and themselves recursively
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- with the power of context-free grammars, from Eric Niebler.
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-
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-Updated Libraries
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-
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- * Assign Library:
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- o Support for ptr_map<key,T> via the new function ptr_map_insert()
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- o Support for initialization of Pointer Containers when the containers
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- hold pointers to an abstract base class.
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- * Date_time library:
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- o Support for new US/Canada timezone rules and other bug fixes.
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- See Change History for details.
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- * Filesystem Library:
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- Major upgrade in preparation for submission to the C++ Standards Committee
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- for TR2. Changes include:
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- o Internationalization, provided by class templates basic_path,
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- basic_filesystem_error, basic_directory_iterator
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- and basic_directory_entry.
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- o Simplification of the path interface by eliminating special constructors
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- to identify native formats.
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- o Rationalization of predicate function design, including the addition of
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- several new functions.
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- o Clearer specification by reference to POSIX, the ISO/IEEE Single Unix
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- Standard, with provisions for Windows and other operating systems.
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- o Preservation of existing user code whenever possible.
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- o More efficient directory iteration.
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- o Addition of a recursive directory iterator.
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- * Function Library:
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- Boost.Function now implements a small buffer optimization, which can
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- drastically improve the performance when copying or constructing
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- Boost.Function objects storing small function objects. For instance,
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- bind(&X:foo, &x, _1, _2) requires no heap allocation when placed into
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- a Boost.Function object.
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- * Functional/Hash Library
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- o Use declarations for standard classes, so that the library doesn't
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- need to include all of their headers
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- o Deprecated the <boost/functional/hash/*.hpp> headers.
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- o Add support for the BOOST_HASH_NO_EXTENSIONS macro, which disables
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- the extensions to TR1
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- o Minor improvements to the hash functions for floating point numbers.
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- * Graph Library:
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- o edmonds_maximum_cardinality_matching, from Aaron Windsor.
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- o lengauer_tarjan_dominator_tree, from JongSoo Park.
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- o compressed_sparse_row_graph, from Jeremiah Willcock and Douglas Gregor
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- of Indiana University.
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- o sorted_erdos_renyi_iterator, from Jeremiah Willcock
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- of Indiana University.
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- o biconnected_components now supports a visitor and named parameters,
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- from Janusz Piwowarski.
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- o adjacency_matrix now models the Bidirectional Graph concept.
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- o dijkstra_shortest_paths now calls vis.initialize_vertex for each
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- vertex during initialization.
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- o Note: the name of the compiled library for the GraphViz reader has
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- changed to boost_graph (from bgl-viz) to match Boost conventions.
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- o See the complete revision history for more information.
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- * MultiArray Library:
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- Boost.MultiArray now by default provides range-checking for operator[].
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- Range checking can be disabled by defining the macro BOOST_DISABLE_ASSERTS
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- before including multi_array.hpp. A bug in multi_array::resize() related
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- to storage orders was fixed.
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- * Multi-index Containers Library:
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- o New random access indices.
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- o Non key-based indices feature new rearrange facilities.
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- o This version also includes a number of optimizations and usage
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- improvements. For a complete list of changes,
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- see the library release notes.
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- * Optional Library:
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- o boost::none_t and boost::none now added to Optional's documentation
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- o Relational operators now directly support arguments of type 'T'
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- and 'none_t'
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- o operator->() now also works with reference types.
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- o Helper functions make_optional(val), make_optional(cond,val)
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- and get_optional_value_or(opt,alternative_value) added.
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- o Constructor taking a boolean condition (as well as a value) added.
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- o Member function get_value_or(alternative_value) added.
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- o Incompatbility bug with mpl::apply<> fixed.
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- o Converting assignment bug with uninitialized lvalues fixed.
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- * Parameter Library:
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- o Every ArgumentPack is now a valid MPL Forward Sequence.
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- o Support for unnamed arguments (those whose keyword is deduced from
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- their types) is added.
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- o Support for named and unnamed template arguments is added.
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- o New overload generation macros solve the forwarding problem directly.
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- o See also the Python library changes, below.
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- * Pointer Container Library:
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- o Support for serialization via Boost.Serialization.
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- o Exceptions can be disabled by defining the macro
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- BOOST_PTR_CONTAINER_NO_EXCEPTIONS before including any header.
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- This macro is defined by default if BOOST_NO_EXCEPTIONS is defined.
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- o Additional std::auto_ptr<T> overloads added s.t. one can also pass
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- std::auto_ptr<T> instead of only T* arguments to member functions.
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- o transfer() now has weaker requirements s.t. one can transfer objects
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- from ptr_container<Derived> to ptr_container<Base>,
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- * Python Library:
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- o Boost.Python now automatically appends C++ signatures to docstrings.
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- The new docstring_options.hpp header is available to control the
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- content of docstrings.
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- o stl_input_iterator, for turning a Python iterable object into an STL
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- input iterator, from Eric Niebler.
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- o Support for void* conversions is added.
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- o Integrated support for wrapping C++ functions built with the
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- parameter library; keyword names are automatically known to
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- docsstrings.
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- o Enhancements to the API for better embedding support
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- (boost::python::import(), boost::python::exec()
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- and boost::python::exec_file()).
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- * Signals Library:
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- More improvements to signal invocation performance from Robert Zeh.
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- * Smart Pointers Library:
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- o Allocator support as proposed in N1851 (162 Kb PDF).
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- o pointer_cast and pointer_to_other utilities to allow
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- pointer-independent code, from Ion Gaztanaga.
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- * String Algorithm Library:
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- o lexicographical_compare
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- o join
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- o New comparison predicates is_less, is_not_greater.
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- o Negative indexes support (like Perl) in various algorihtms
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- (*_head/tail, *_nth).
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- * Wave Library:
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- o Wave now correctly recognizes pp-number tokens as mandated by the
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- C++ Standard, which are converted to C++ tokens right before they are
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- returned from the library.
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- o Several new preprocessing hooks have been added. For a complete
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- description please refer to the related documentation page:
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- The Context Policy.
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- o Shared library (dll) support has been added for the generated Wave
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- libraries.
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- o The overall error handling has been improved. It is now possible to
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- recover and continue after an error or a warning was issued.
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- o Support for optional comment and/or full whitespace preservation
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- in the generated output stream has been added.
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- o The Wave library now performs automatic include guard detection to
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- avoid accessing header files more than once, if appropriate.
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- o Full interactive mode has been added to the Wave tool. Now the Wave
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- tool can be used just like Python or Perl for instance to
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- interactively try out your BOOST_PP macros. Additionally it is now
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- possible to load and save the current state of an interactive
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- session (macro tables et.al.).
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- o The overall performance has been improved by upto 40-60%, depending
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- on the concrete files to process.
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- o Support for new pragmas has been added allowing to control certain
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- library features from inside the preprocessed sources (partial
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- output redirection, control of generated whitespace and #line
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- directives).
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- o Optional support for #pragma message "..." has been added.
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- o This version also includes a number of bug fixes and usage
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- improvements. For a complete list of changes, see the libraries
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- change log.
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-
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-Supported Compilers
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-
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- Boost is tested on a wide range of compilers and platforms. Since Boost libraries
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- rely on modern C++ features not available in all compilers, not all Boost
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- libraries will work with every compiler. The following compilers and platforms
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- have been extensively tested with Boost, although many other compilers and
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- platforms will work as well. For more information, see the regression test
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- results.
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-
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- * Apple GCC 4.0.1 on Mac OS X.
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- * Borland C++ 5.8.2 on Windows.
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- * GNU C++
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- o 3.2.x., 3.3.x, 3.4.x, 4.0.x, 4.1.x on Linux
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- o 4.1.x on Solaris
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- o 3.4.x on Windows
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- * HP aC++ A.06.14.
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- * Intel C++ 9.1 on Windows, 9.0 on Linux.
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- * Metrowerks CodeWarrior 9.4 on Windows.
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- * Microsoft Visual C++ 6.0 (sp5, with and without STLport), 7.0, 7.1, 8.0.
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- Note: Boost does not support the non-standard "Safe" C++ Library shipping
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- with Visual C++ 8.0, which may result in many spurious warnings from Boost
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- headers and other standards-conforming C++ code. To suppress these warnings,
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- define the macro _SCL_SECURE_NO_DEPRECATE.
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- * Sun Studio 11 on Solaris.
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-
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-Acknowledgements
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-
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- Thomas Witt managed this release.
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-
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- A great number of people contributed their time and expertise to make this release
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- possible. Special thanks go to Vladimir Prus for making Boost.Build version 2 a
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- reality, David Abrahams for authoring a new Getting Started guide, Rene Rivera for
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- general build and installation support and Greg D. for answering countless questions.
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Troy D. Straszheim