From: Thomas Witt (witt_at_[hidden])
Date: 2007-05-12 20:47:14
Boost 1.34.0, the latest version of peer-reviewed, portable C++
libraries, has been released. This release brings five new libraries
and extensive updates to existing libraries.
* Foreach Library:
BOOST_FOREACH macro for easily iterating over the elements of a
sequence, from Eric Niebler.
* Statechart Library:
Arbitrarily complex finite state machines can be implemented in
easily readable and maintainable C++ code, from Andreas Huber.
* TR1 Library:
An implementation of the C++ Technical Report on Standard
Extensions, from John Maddock.
This library does not itself implement the TR1 components,
it's a thin wrapper that will include your standard
implementation (if it has one), otherwise it will include
Library equivalents, and import them into namespace
include: Reference Wrappers, Smart Pointers, result_of,
Function Object Binders, Polymorphic function wrappers, Type
Random Number Generators and Distributions, Tuples, Fixed
Hash Function Objects, Regular Expressions and
Complex Number Additional Algorithms.
* Typeof Library:
Typeof operator emulation, from Arkadiy Vertleyb and Peder
* Xpressive Library:
Regular expressions that can be written as strings or as
templates, and that can refer to each other and themselves
with the power of context-free grammars, from Eric Niebler.
* Assign Library:
o Support for ptr_map<key,T> via the new function
o Support for initialization of Pointer Containers when
hold pointers to an abstract base class.
* Date_time library:
o Support for new US/Canada timezone rules and other bug
See Change History for details.
* Filesystem Library:
Major upgrade in preparation for submission to the C++
for TR2. Changes include:
o Internationalization, provided by class templates
o Simplification of the path interface by eliminating
to identify native formats.
o Rationalization of predicate function design, including
the addition of
several new functions.
o Clearer specification by reference to POSIX, the ISO/
IEEE Single Unix
Standard, with provisions for Windows and other
o Preservation of existing user code whenever possible.
o More efficient directory iteration.
o Addition of a recursive directory iterator.
* Function Library:
Boost.Function now implements a small buffer optimization,
drastically improve the performance when copying or
Boost.Function objects storing small function objects. For
bind(&X:foo, &x, _1, _2) requires no heap allocation when
a Boost.Function object.
* Functional/Hash Library
o Use declarations for standard classes, so that the
need to include all of their headers
o Deprecated the <boost/functional/hash/*.hpp> headers.
o Add support for the BOOST_HASH_NO_EXTENSIONS macro,
the extensions to TR1
o Minor improvements to the hash functions for floating
* Graph Library:
o edmonds_maximum_cardinality_matching, from Aaron Windsor.
o lengauer_tarjan_dominator_tree, from JongSoo Park.
o compressed_sparse_row_graph, from Jeremiah Willcock and
of Indiana University.
o sorted_erdos_renyi_iterator, from Jeremiah Willcock
of Indiana University.
o biconnected_components now supports a visitor and named
from Janusz Piwowarski.
o adjacency_matrix now models the Bidirectional Graph
o dijkstra_shortest_paths now calls vis.initialize_vertex
vertex during initialization.
o Note: the name of the compiled library for the GraphViz
changed to boost_graph (from bgl-viz) to match Boost
o See the complete revision history for more information.
* MultiArray Library:
Boost.MultiArray now by default provides range-checking for
Range checking can be disabled by defining the macro
before including multi_array.hpp. A bug in
to storage orders was fixed.
* Multi-index Containers Library:
o New random access indices.
o Non key-based indices feature new rearrange facilities.
o This version also includes a number of optimizations and
improvements. For a complete list of changes,
see the library release notes.
* Optional Library:
o boost::none_t and boost::none now added to Optional's
o Relational operators now directly support arguments of
o operator->() now also works with reference types.
o Helper functions make_optional(val), make_optional
and get_optional_value_or(opt,alternative_value) added.
o Constructor taking a boolean condition (as well as a
o Member function get_value_or(alternative_value) added.
o Incompatbility bug with mpl::apply<> fixed.
o Converting assignment bug with uninitialized lvalues fixed.
* Parameter Library:
o Every ArgumentPack is now a valid MPL Forward Sequence.
o Support for unnamed arguments (those whose keyword is
their types) is added.
o Support for named and unnamed template arguments is added.
o New overload generation macros solve the forwarding
o See also the Python library changes, below.
* Pointer Container Library:
o Support for serialization via Boost.Serialization.
o Exceptions can be disabled by defining the macro
BOOST_PTR_CONTAINER_NO_EXCEPTIONS before including any
This macro is defined by default if BOOST_NO_EXCEPTIONS
o Additional std::auto_ptr<T> overloads added s.t. one can
std::auto_ptr<T> instead of only T* arguments to member
o transfer() now has weaker requirements s.t. one can
from ptr_container<Derived> to ptr_container<Base>,
* Python Library:
o Boost.Python now automatically appends C++ signatures to
The new docstring_options.hpp header is available to
content of docstrings.
o stl_input_iterator, for turning a Python iterable object
into an STL
input iterator, from Eric Niebler.
o Support for void* conversions is added.
o Integrated support for wrapping C++ functions built with
parameter library; keyword names are automatically known to
o Enhancements to the API for better embedding support
* Signals Library:
More improvements to signal invocation performance from
* Smart Pointers Library:
o Allocator support as proposed in N1851 (162 Kb PDF).
o pointer_cast and pointer_to_other utilities to allow
pointer-independent code, from Ion Gaztanaga.
* String Algorithm Library:
o New comparison predicates is_less, is_not_greater.
o Negative indexes support (like Perl) in various algorihtms
* Wave Library:
o 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.
o Several new preprocessing hooks have been added. For a
description please refer to the related documentation page:
The Context Policy.
o Shared library (dll) support has been added for the
o The overall error handling has been improved. It is now
recover and continue after an error or a warning was
o Support for optional comment and/or full whitespace
in the generated output stream has been added.
o The Wave library now performs automatic include guard
avoid accessing header files more than once, if
o 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
session (macro tables et.al.).
o The overall performance has been improved by upto
on the concrete files to process.
o Support for new pragmas has been added allowing to
library features from inside the preprocessed sources
output redirection, control of generated whitespace and
o Optional support for #pragma message "..." has been added.
o This version also includes a number of bug fixes and usage
improvements. For a complete list of changes, see the
Boost is tested on a wide range of compilers and platforms. Since
rely on modern C++ features not available in all compilers, not
libraries will work with every compiler. The following compilers
have been extensively tested with Boost, although many other
platforms will work as well. For more information, see the
* Apple GCC 4.0.1 on Mac OS X.
* Borland C++ 5.8.2 on Windows.
* GNU C++
o 3.2.x., 3.3.x, 3.4.x, 4.0.x, 4.1.x on Linux
o 4.1.x on Solaris
o 3.4.x on Windows
* HP aC++ A.06.14.
* Intel C++ 9.1 on Windows, 9.0 on Linux.
* Metrowerks CodeWarrior 9.4 on Windows.
* Microsoft Visual C++ 6.0 (sp5, with and without STLport), 7.0,
Note: Boost does not support the non-standard "Safe" C++
with Visual C++ 8.0, which may result in many spurious
warnings from Boost
headers and other standards-conforming C++ code. To suppress
define the macro _SCL_SECURE_NO_DEPRECATE.
* Sun Studio 11 on Solaris.
Thomas Witt managed this release.
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
-- Thomas Witt witt_at_[hidden]
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