Release notes for work in progress boost

Version 1.56.0

In Progress

New Libraries

Align: Memory alignment functions, allocators, and adaptors, from Glen Fernandes.
TODO

Updated Libraries

Assign:
- Resolve some C++11 ambiguities (#3073).
Circular Buffer:
- #9970 Support for the C++11 allocator model
Concept Check:
- Fewer warnings (includes #5012).
Context:
- fcontext_t is opaque pointer to context-data
- changed signature of make_fcontext()
- #8826 no executable stack
- #9437 catch exceptions on iOS and Windows Phone 8
- #9445 support for x32 ABIs
- #9522 support for powerpc_64le
- #9743 bugfix for powerpc_64 le/be
Coroutine:
- support of symmetric coroutines
- #9355 fix race condition in protected_stack_allocator
- #9551 list of supported architectures
- #9734 wrong check of mmap() return value
- #9735 no memset() for protected_stack_allocator
- #9760 coroutine iterator need const operator==
Flyweight:
- In compilers with variadic template support, boost::flyweight<T> now provides a perfectly forwarding constructor to T::T (previously an emulation was used).
- flyweight now replicates the initializer-list constructors and assignment operators of its underlying type.
- Fixed intermodule static initialization problem (ticket #9553).
- Maintenance fixes.
Multi-index Containers:
- The erase(iterator) member function of hashed indices used to have poor performance under low load conditions due to the requirement that an iterator to the next element must be returned (see ticket #4264). In accordance with the resolution of LWG issue #579, this problem has been fixed while maintaining the interface of erase, at the expense of using one more word of memory per element. In fact, C++ complexity requirements on unordered associative containers have been improved for hashed indices so that
  - deletion of a given element is unconditionally constant-time,
  - worst-case performance is not O(n) but O(n_dist), where n_dist is the number of non-equivalent elements in the index.
  Due to the fact that hashed indices rely on a new data structure, the internal representation of their iterators and local iterators have changed, which affects serialization: their corresponding serialization class version has been bumped from 0 to 1. Old archives involving hashed index (local) iterators can be loaded by Boost 1.56 version of Boost.MultiIndex, but not the other way around.
- Hashed indices now provide reserve.
- Hashed indices can now be checked for equality and inequality following the (suitably adapted) C++ standard specification in [unord.req].
- The public interface of Boost.MultiIndex provide noexcept specifications where appropriate (for compliant compilers).
- Improved performance of failed insertions into a multi_index_container.
- Much internal code aimed at supporting MSVC++ 7.0 and prior has been removed. Compilation times without this legacy code might be slightly faster.
- Fixed a bug with insertion via iterators dereferencing to rvalues (ticket #9665).
- Made Boost.MultiIndex compatible with BOOST_BIND_NO_PLACEHOLDERS (ticket #9798).
- Maintenance fixes.
Program Options:
- Columns in the --help output are now aligned across all option groups (#6114).
- Option names with dashes are no longer truncated in error messages (#8009).
Smart Pointers:
- Updated the overloads of make_shared and allocate_shared of array types (T[] or T[N]) to conform to the specification in C++ standard paper N3939 and significantly reduced the spatial overhead of the internal bookkeeping structures.
- Updated the implementations of make_shared and allocate_shared for scalar types and array types, respectively, to resolve C++ standard library defect report #2070.
UUID:
- Added basic support for C++11 features.
- Implemented SSE-optimized versions of some functions of uuid, including comparison operators and swap. The support for different versions of SSE is automatically detected at compile time for most compilers, but can also be explicitly enabled or disabled with configuration macros. (#8509)
- Silenced some compiler warnings. (#8495, #8697)
TODO

Compilers Tested

Boost's primary test compilers are:

TODO

Boost's additional test compilers include:

TODO

Acknowledgements

TODO

Version 1.55.0

Mon, 11 Nov 2013 11:50:20 -0800

Other Downloads

Windows binaries
PDF documentation (only for BoostBook based documentation).

News

Support was removed from Config for some very old versions of compilers. The new minimum requirements are:

Digitial Mars 8.41
GCC 3.3
Intel 6.0
Visual C++ 7.1

Note: This is just the mininimum requirements for Config. Some Boost libraries may have higher mininimum requirements and not support all platforms or compilers.

Other compilers are currently unchanged, but we are considering removing support for some other old compilers. Candidates for removal are:

Metroworks C++ (i.e. codewarrior)
SunPro 5.7 and earlier
Borland C++ Builder 2006 (5.82) and earlier

If you're using any of these, please let us know on the mailing lists. We will take into account any feedback received before making a decision.

Known Bugs with Visual Studio 2013/Visual C++ 12

Visual Studio 2013 was released quite late in the release process, so there exist several unresolved issues. These include:

Serialization can't compile because of a missing include.
Using has_member_function_callable_with from Boost.Container's allocator_traits causes a compile error (#9332).
In libraries such as Unordered and MultiIndex, calling overloaded functions with initializer lists can result in a compile error, with Visual C++ claiming that the overloads are ambiguous. This is a Visual C++ bug and it isn't clear if there's a good workaround. This won't affect code that doesn't use initializer lists, or uses an initializer list that doesn't require an implicit conversion (i.e. an initializer list of the container's exact value type).
Thread: ex_scoped_thread compile fails (#9333).

Patches

Log patch: fixes incorrect output of the dump manipulator, when used on AVX2-enabled CPU (e.g. Intel Haswell).

New Libraries

Predef: This library defines a set of compiler, architecture, operating system, library, and other version numbers from the information it can gather of C, C++, Objective C, and Objective C++ predefined macros or those defined in generally available headers, from Rene Rivera.

Updated Libraries

Accumulators:
- #7915 Fix silly typos.
- #8850 Fix MSVC warnings.
- #8262 Rename average to fdiv.
Any:
- boost::bad_any_cast exception is now visible across modules #8751.
- Added clear() member function.
- Added missing BOOST_NOEXCEPT.
- Fixed issue with const rvalues #9215.
Asio:
- Implemented a limited port to Windows Runtime. This support requires that the language extensions be enabled. Due to the restricted facilities exposed by the Windows Runtime API, the port also comes with the following caveats:
  - The core facilities such as the io_service, strand, buffers, composed operations, timers, etc., should all work as normal.
  - For sockets, only client-side TCP is supported.
  - Explicit binding of a client-side TCP socket is not supported.
  - The cancel() function is not supported for sockets. Asynchronous operations may only be cancelled by closing the socket.
  - Operations that use null_buffers are not supported.
  - Only tcp::no_delay and socket_base::keep_alive options are supported.
  - Resolvers do not support service names, only numbers. I.e. you must use "80" rather than "http".
  - Most resolver query flags have no effect.
- Fixed a regression (introduced in Boost 1.54) where, on some platforms, errors from async_connect were not correctly propagated through to the completion handler (#8795).
- Fixed a Windows-specific regression (introduced in Boost 1.54) that occurs when multiple threads are running an io_service. When the bug occurs, the result of an asynchronous operation (error and bytes transferred) is incorrectly discarded and zero values used instead. For TCP sockets this results in spurious end-of-file notifications (#8933).
- Fixed a bug in handler tracking, where it was not correctly printing out some handler IDs (#8808).
- Fixed the comparison used to test for successful synchronous accept operations so that it works correctly with unsigned socket descriptors (#8752).
- Ensured the signal number is correctly passed to the completion handler when starting an async_wait on a signal that is already raised (#8738).
- Suppressed a g++ 4.8+ warning about unused typedefs (#8980).
- Enabled the move optimisation for handlers that use the default invocation hook (#8624).
- Clarified that programs must not issue overlapping async_write_at operations (#8669).
- Changed the Windows HANDLE backend to treat ERROR_MORE_DATA as a non-fatal error when returned by GetOverlappedResult for a synchronous read (#8722).
- Visual C++ language extensions use generic as a keyword. Added a workaround that renames the namespace to cpp_generic when those language extensions are in effect.
- Fixed some asynchronous operations that missed out on getting async_result support in Boost 1.54. In particular, the buffered stream templates have been updated so that they adhere to current handler patterns (#9000, #9001).
- Enabled move support for Microsoft Visual Studio 2012 (#8959).
- Added use_future support for Microsoft Visual Studio 2012.
- Removed a use of std::min in the Windows IOCP backend to avoid a dependency on the <algorithm> header (#8758).
- Eliminated some unnecessary handler copies.
- Fixed various minor and cosmetic issues in code and documentation (including #8347, #8950, #8953, #8965, #8997).
Atomic:
- Added support for 64-bit atomic operations on x86 target for GCC, MSVC and compatible compilers. The support is enabled when it is known at compile time that the target CPU supports required instructions.
- Added support for 128-bit atomic operations on x86-64 target for GCC and compatible compilers. The support is enabled when it is known at compile time that the target CPU supports required instructions. The support can be tested for with the new BOOST_ATOMIC_INT128_LOCK_FREE macro.
- Added a more efficient implementation of atomic<> based on GCC __atomic* intrinsics available since GCC 4.7.
- Added support for more ARM v7 CPUs, improved detection of Thumb 2.
- Added support for x32 (i.e. 64-bit x86 with 32-bit pointers) target on GCC and compatible compilers.
- Removed dependency on Boost.Thread.
- Internal lock pool now includes proper padding and alignment to avoid false sharing.
- Fixed compilation with Intel compiler on Windows. Removed internal macro duplication when compiled on Windows.
- Some code refactoring to use C++11 features when available.
Chrono:
- Fixed Bugs:
  - #7868 chrono_io parses time incorrectly (1.53 and 1.52)
  - #9028 Typo in boost/chrono/stopwatches/formatters/base_formatter.hpp
  - #9147 uninitialized std::tm
Circular Buffer:
- Added support for rvalue references and rvalue references emulation using Boost.Move. Values are moved only if value type has noexcept move constructor and noexcept move assignment operator #7888. Now Circular Buffer is usable with move-only types.
- Much better documentation.
- #5362 circular_buffer does not compile with BOOST_NO_EXCEPTIONS.
- #7025 circular buffer reports warning: " type qualifiers ignored on function return type" while compile.
- #7950 Eliminate W4-warnings under VS2005 - warning C4913: user defined binary operator ',' exists but no overload could convert all operands, default built-in binary operator ',' used.
Config:
- Breaking change: Removed support for some older compilers. The new minimum compiler versions are:
  - Digitial Mars 8.41
  - GCC 3.3
  - Intel 6.0
  - Visual C++ 7.1
  Other compilers are unchanged.
Container:
- Implemented SCARY iterators.
- Fixed bugs #8269, #8473, #8892, #9009, #9064, #9092, #9108.
Context:
- #8650 SSE2 intrinsics
Coroutine:
- New interface (unidirectional data transfer).
- #8782 no best alternative
- #8801 auto-linking
Filesystem:
- Fixed Android compilation #8706.
Fusion:
- #8759 specialization of convert_impl for map_tag
Geometry:
- Additional functionality
  - Added centroid for segment type
  - Added intersects() and disjoints() for Segment-Box and Linestring-Box
  - Added rtree creation using packing algorithm
  - Added contains() and covers() spatial query predicates
  - Added iterative queries
- Bugfixes
  - In some cases .back() or .clear() was called, violating the usage of Concepts. Fixed for the reported cases
- Solved tickets
  - 6958 Intersection generates self-intersection. Caused by spike, fixed
  - 8364 Invalid input exception, caused by spikes in previous steps, fixed
  - 8365 Invalid input exception, caused by spikes in previous steps, fixed
  - 8969 boost::geometry::model::point single argument constructor should be explicit
  - 8825 Patch adding member variable documentation to doxygen_xml2qbk
  - 8652 Intersection fails for triangle-triangle intersection. Caused by spike, fixed
  - 9047 Boost files that include themselves (strategies/intersection.hpp), fixed
Graph:
- void is no longer allowed as a bundled property type (for example, in the VertexProperties template parameters to graph types); it did not work reliably before, but a static assertion now forbids it entirely. Use boost::no_property instead.
- Added support for finish_edge visitor event point in depth-first search; the change should be backward-compatible with visitors that do not have that member function.
- Disabled building of tests on Sun compiler.
- Multiple source vertices are supported in non-named-parameter versions of breadth_first_visit, breadth_first_search, dijkstra_shortest_paths, and dijkstra_shortest_paths_no_init. This feature is not yet documented; to use it, replace the single parameter for the source vertex in each of these functions by two input iterators of the same type containing the source vertices to use.
- Added Hawick circuits algorithm; contributed by Louis Dionne.
- Added edge coloring algorithm; contributed by Maciej Piechotka.
- Added min-cost max-flow algorithm; contributed by Piotr Wygocki.
- Bugs and feature requests from Trac fixed: #5269, #8317, #8433, #8791, #8877, #8986, #9012, #9080.
Hash:
- Simplify a SFINAE check so that it will hopefully work on Sun 5.9 (#8822).
- Suppress Visual C++ infinite loop warning (#8568).
Interprocess:
- Fixed bugs #7156, #7164, #8277, #8976, #9065, #9073, #9008.
Intrusive:
- Source breaking: Deprecated xxx_dont_splay functions from splay containers. Deprecated splay_set_hook from splay containers, use bs_set_hook instead. Both will be removed in Boost 1.56.
- ABI breaking: Hash containers' end iterator was implemented pointing to one-past the end of the bucket array (see #8698) causing severe bugs when values to be inserted where allocated next to the bucket array. End iterator implementation was changed to point to the beginning of the bucket array.
- Big refactoring in order to reduce template and debug symbol bloat. Test object files have been slashed to half in MSVC compilers in Debug mode. Toolchains without Identical COMDAT Folding (ICF) should notice size improvements.
- Implemented SCARY iterators.
Lexical cast:
- std::bad_alloc exceptions are now are not converted to boost::bad_lexical_cast #8966.
- Added static assert that checks for std::numeric_limits specializations if they are required for conversion. Use BOOST_HAS_INT128 for detecting 128 bit integers support #8790.
- Documentation improved and more usage examples added.
Log:
- General changes:
  - Added a new configuration macro BOOST_LOG_WITHOUT_DEFAULT_FACTORIES. By defining this macro the user can disable compilation of the default filter and formatter factories used by settings parsers. This can substantially reduce binary sizes while still retaining support for settings parsers.
  - Rewritten some of the parsers to reduce the compiled binary size. The rewritten parsers are more robust in detecting ambiguous and incorrect input.
  - The following headers are deprecated: boost/log/utility/intrusive_ref_counter.hpp, boost/log/utility/explicit_operator_bool.hpp, boost/log/utility/empty_deleter.hpp. These headers will be removed in future releases. The contents of these headers were moved to other libraries.
- Bug fixes:
  - Fixed timer attribute generating incorrect time readings on Windows on heavy thread contention when QueryPerformanceCounter API was used.
  - Fixed a bug in the filter parser that prevented using parsed filters with some attributes.
  - Fixed thread id formatting discrepancies between the default sink and formatters.
  - Closed tickets: #8815, #8819, #8915, #8917, #9139, #9140, #9153, #9155.
- See changelog for more details.
Math:
- Suppress numerous warnings (mostly from GCC-4.8 and MSVC) #8384, #8855, #9107, #9109..
- Fixed PGI compilation issue #8333.
- Fixed PGI constant value initialization issue that caused erf to generate incorrect results #8621.
- Prevent macro expansion of some C99 macros that are also C++ functions #8732 and #8733..
- Fixed Student's T distribution to behave correctly with huge degrees of freedom (larger than the largest representable integer) #8837.
- Make some core functions usable with long double even when the platform has no standard library long double support #8940.
- Fix error handling of distributions to catch invalid scale and location parameters when the random variable is infinite #9042 and #9126.
- Add workaround for broken <tuple> in Intel C++ 14 #9087.
- Improve consistency of argument reduction in the elliptic integrals #9104.
- Fix bug in inverse incomplete beta that results in cancellation errors when the beta function is really an arcsine or Student's T distribution.
- Fix issue in Bessel I and K function continued fractions that causes spurious over/underflow.
- Add improvement to non-central chi squared distribution quantile due to Thomas Luu.
Move:
- Fixed bugs #7952, #8764, #8765, #8842, #8979.
Meta State Machine:
- New feature: interrupt states now support a sequence of events to end the interruption.
- Fixed Trac #8686.
Multiprecision:
- Added support for Boost.Serialization.
- Suppressed some GCC warnings. See 8872.
- Fixed bug in pow for large integer arguments. See 8809.
- Fixed bug in pow for calculation of 0[super N]. See 8798.
- Fixed bug in fixed precision cpp_int IO code that causes conversion to string to fail when the bit count is very small (less than CHAR_BIT). See 8745.
- Fixed bug in cpp_int that causes left shift to fail when a fixed precision type would overflow. See 8741.
- Fixed some cosmetic warnings from cpp_int. See 8748.
- Fixed calls to functions which are required to be macros in C99. See 8732.
- Fixed bug that causes construction from INT_MIN, LONG_MIN etc to fail in cpp_int. See 8711.
Multi-index Containers:
- Boost.MultiIndex has been brought to a higher level of compliance with C++11.
  - multi_index_container is now efficiently movable.
  - Initializer lists supported.
  - Emplace functions provided.
  - Non-copyable elements (such as std::unique_ptr<T>) supported. This includes insertion of a range [first,last) where the iterators point to a type that is convertible to that of the element: no copy construction happens in the process.
  - Random access indices provide shrink_to_fit().
  Refer to the compiler specifics section for limitations on pre-C++11 compilers.
- The following classes are deprecated:
- Maintenance fixes.
MPI:
- Replaced calls to deprecated MPI functions
- Added support for multi-threaded initialization
- Added in-place collectives
Phoenix:
- #9049 phoenix::function constructor is constexpr.
Polygon:
- Updated CGAL part of the Voronoi benchmark with patches from Sebastien Loriot. Updated documentation.
- Added polygon decomposition capability to polygon_90_set_data container (patch from Intel). Updated documentation.
- Bugs fixed from Trac: #8197.
PropertyMap:
- dynamic_properties objects can now be built by non-destructively chaining .property(name, pm) calls. Example:
```
boost::dynamic_properties()
  .property("color", color_map)
  .property("pos", position_map)
```
- The use of raw pointers as property maps is deprecated; it often failed on Visual Studio in the past. This usage has been removed from all tests and examples in Boost.Graph. The replacement to use for vertex properties in graphs (the most common use for this feature) is:
```
boost::make_iterator_property_map(
  <pointer or container .begin() iterator>,
  get(boost::vertex_index, <graph object>))
```
  (Note: the lack of namespace qualification on get() in this code is necessary for generic code). Outside a graph context, the closest equivalent is:
```
boost::make_iterator_property_map(
  <pointer>,
  boost::typed_identity_property_map<std::size_t>())
```
  There are commented-out static assertions on lines 151 and 159 of <boost/property_map/property_map.hpp> that can be un-commented to find deprecated uses of pointers in user code.
Rational:
- Added lowest and max_digits10, members of std::numeric_limits added in C++11, to the unit-test code. Needed since Boost.Test refers to one of them when compiled in C++11 mode.
- Changed initialization of some internal variables to something that cannot be a narrowing conversion, which fixes issue #5855. Needed since narrowing conversions are an error in C++11.
SmartPtr:
- Added boost/smart_ptr/intrusive_ref_counter.hpp header, extracted from Boost.Log. The header implements a mixin base class that adds support for intrusive_ptr to user's classes.
Thread:
- New Features:
  - #8519 Synchro: Update class barrier with a completion function.
  - #8515 Async: Add shared_future::then.
  - #8519 Synchro: Update class barrier with a completion function
  - #8615 Async: Replace make_future/make_shared_future by make_ready_future.
  - #8627 Async: Add future<>::unwrap and unwrapping constructor.
  - #8677 Async: Add future<>::get_or.
  - #8678 Async: Add future<>::fallback_to.
  - #8891 upgrade_to_unique_lock: missing mutex() function.
  - #8955 Request for more efficient way to get exception_ptr from future.
- Fixed Bugs:
  - #7461 detail::win32::ReleaseSemaphore may be called with count_to_release equal to 0
  - #8070 prefer GetTickCount64 over GetTickCount
  - #8768 win32 condition_variable::wait_until infinite wait in rare cases.
  - #8817 Boost Thread Windows CE _createthreadex handling breaks mingw w64.
  - #8943 Failed to compile code using boost::call_once with Intel C++ Composer XE 2013 on Windows.
  - #8931 Typos in external_locking reference.
  - #9029 Misprint in documentation.
  - #9037 gcc -Wshadow gives warnings in condition_variable{,_fwd}.hpp.
  - #9041 Boost.Thread DSO's may need to link with Boost.Atomic.
  - #9048 boost::scoped_thread useless ctor with variadic template arguments.
  - #9079 Condition variable will wait forever for some timepoint values (Win).
Timer:
- Fixed compilation on Intel compiler #8956.
Type Traits:
- Added is_copy_contructible trait #8802.
Unordered:
- Avoid some warnings (#8851, #8874).
- Avoid exposing some detail functions via. ADL on the iterators.
- Work around variadic parameter bug in Visual Studio 2013. The compiler still has problems with initializer lists, but it might not be possible to work around those.
Utility:
- boost::result_of can be set to use TR1 protocol by default and fall back to decltype if the function object does not support it (like C++11 lambda functions, for example). Define BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK configuration macro to enable this mode.
- Improved support for C++11 in the boost::base_from_member class template. The class implements perfect forwarding for the constructor arguments, if the compiler supports rvalue references, variadic templates and function template default arguments.
- Added boost/utility/explicit_operator_bool.hpp and boost/utility/empty_deleter.hpp headers, which were extracted from Boost.Log. The headers implement utilities for defining explicit conversion operators to bool and a deleter function object that does nothing, respectively.
Variant:
- Fixed compilation of constructor and assignment operator with const rvalues input parameters #8988.
- Fixed compilation of move assignment operator for situations when one of the variant template classes has nothrow copy constructor and throwing move constructor #8772.
- Fix compilation on exception-disabled environments #8717.
- Fix unreachable code warnings #8665.
- Removed duplicate code #7601.
Wave:
- See the Changelog for details.
xpressive:
- #8843 throw instead of assert at incomplete charset
- #8880 remove unused local typedef
- #8882 use RAII instead of try/catch in sequence_stack.hpp
- #8474 make xpressive play nice with clang's -Wimplicit-fallthrough diagnostic

Updated Tools

Quickbook:
- Quickbook 1.6 finalized, see the Quickbook documentation for details.

Compilers Tested

Boost's primary test compilers are:

Linux:
- Clang: 3.3, 3.2, 3.1, 3.0
- Clang, C++11, libc++: 3.4, 3.3
- GCC: 4.8.1, 4.7.3, 4.6.3, 4.5.3, 4.4.7
- GCC, C++11: 4.8.1
- GCC, C++98: 4.8.1
OS X:
- GCC: 4.2
- Apple Clang: 5.0
- Apple Clang, C++11: 5.0
Windows:
- GCC, mingw: 4.8.0, 4.7.2, 4.6.3, 4.5.4, 4.4.7
- Visual C++: 11.0, 10.0, 9.0

Boost's additional test compilers include:

OS X:
- Apple Clang: 5.0
- Apple Clang, C++11: 5.0
- Clang: trunk
- Clang, C++11: trunk
- GCC: 4.2.1
Linux:
- Clang: 3.3, 3.2, 3.1, 3.0, trunk
- Clang, C++11: 3.4
- Clang, C++11, libc++: 3.4, 3.3
- GCC: 4.9.0 (experimental), 4.8.1, 4.7.3, 4.6.4, 4.5.3, 4.4.7
- GCC, C++11: 4.8.1
- GCC, C++98: 4.8.1
- Intel: 13.0.1, 12.1.6
Windows:
- GCC, mingw: 4.8.0, 4.7.2, 4.6.3, 4.5.4, 4.4.7
- Visual C++: 11.0, 10.0, 9.0

Acknowledgements

Beman Dawes, Eric Niebler, Rene Rivera, Daniel James, Vladimir Prus and Marshall Clow managed this release.

Version 1.54.0

Mon, 1 Jul 2013 10:10:02 -0700

Patches

These are patches from library authors which were found too late to be fixed in the 1.54.0 release. Be careful as they have not been through the normal testing process.

News

Supported CPUs

Boost no longer supports the 80386 target CPU, the minimum x86 32-bit target is i486. The 80386 target was not properly supported by Boost.SmartPtr and Boost.Atomic (as well as the libraries that used them internally) even before this release. Some Boost libraries may have higher requirements on the minimum target CPU (like Boost.Log for example), see the respective library documentation for details.

Also by default, when building Boost for x86 32-bit targets it will compile for i686 (Pentium Pro) and later CPUs. This can be changed by specifying the instruction-set property in b2 or bjam command line, for example:

b2 variant=release architecture=x86 instruction-set=i486 stage

Possible values for the instruction-set are:

Target for the host CPU: native
Generic x86 CPUs: i486, i586, i686
Intel CPUs: pentium, pentium-mmx, pentiumpro, pentium2, pentium3, pentium3m, pentium-m, pentium4, pentium4m, prescott, nocona, core2, corei7, corei7-avx, core-avx-i, conroe, conroe-xe, conroe-l, allendale, merom, merom-xe, kentsfield, kentsfield-xe, penryn, wolfdale, yorksfield, nehalem, sandy-bridge, ivy-bridge, haswell, atom
AMD CPUs: k6, k6-2, k6-3, athlon, athlon-tbird, athlon-4, athlon-xp, athlon-mp, k8, opteron, athlon64, athlon-fx, k8-sse3, opteron-sse3, athlon64-sse3, amdfam10, barcelona, bdver1, bdver2, bdver3, btver1, btver2
VIA CPUs: c3, c3-2
IDT CPUs: winchip-c6, winchip2

Note that not all these values may be supported by a particular compiler.

Signals deprecated

Boost.Signals is no longer being actively maintained, so it has been deprecated. Do not use Boost.Signals for new development (use Boost.Signals2 instead). If you have existing Boost.Signals-based code, it will continue to work, but consider moving to Boost.Signals2. There is a porting guide in the Signals2 documentation.

New Libraries

Log: Logging library, from Andrey Semashev.
TTI: Type Traits Introspection library, from Edward Diener.
Type Erasure: Runtime polymorphism based on concepts.

Updated Libraries

Accumulators:
- Fixes comment typos (#7917)
- Silence unused variable warnings (#6926)
Algorithm:
- The return types for copy_while and copy_until have been changed. This is an interface change. If you were using the return values from these functions, then you will have to modify your code. Instead of just returning the modified OutputIterator, these functions now return a std::pair<InputIterator, OutputIterator>. If this change affects your code, the simplest change is to add a .second to the end of the call, which will get you the same behavior that you had before.
- Added C++14 versions of 'is_permutation', 'equal' and 'mismatch'.
Any:
- Added C++11 features support #6999:
  - Move assignment and move constructors.
  - Added noexcept modifiers.
Asio:
- Added new traits classes, handler_type and async_result, that allow the customisation of the return type of an initiating function.
- Added the asio::spawn() function, a high-level wrapper for running stackful coroutines, based on the Boost.Coroutine library. The spawn() function enables programs to implement asynchronous logic in a synchronous manner. For example: size_t n = my_socket.async_read_some(my_buffer, yield);.
- Added the asio::use_future special value, which provides first-class support for returning a C++11 std::future from an asynchronous operation's initiating function. For example: future<size_t> n = my_socket.async_read_some(my_buffer, asio::use_future);.
- Promoted the stackless coroutine class and macros to be part of Asio's documented interface, rather than part of the HTTP server 4 example.
- Added a new handler hook called asio_handler_is_continuation. Asynchronous operations may represent a continuation of the asynchronous control flow associated with the current executing handler. The asio_handler_is_continuation hook can be customised to return true if this is the case, and Asio's implementation can use this knowledge to optimise scheduling of the new handler. To cover common cases, Asio customises the hook for strands, spawn() and composed asynchronous operations.
- Added four new generic protocol classes, generic::datagram_protocol, generic::raw_protocol, generic::seq_packet_protocol and generic::stream_protocol, which implement the Protocol type requirements, but allow the user to specify the address family (e.g. AF_INET) and protocol type (e.g. IPPROTO_TCP) at runtime.
- Added C++11 move constructors that allow the conversion of a socket (or acceptor) into a more generic type. For example, an ip::tcp::socket can be converted into a generic::stream_protocol::socket via move construction.
- Extended the basic_socket_acceptor<> class's accept() and async_accept() functions to allow a new connection to be accepted directly into a socket of a more generic type. For example, an ip::tcp::acceptor can be used to accept into a generic::stream_protocol::socket object.
- Moved existing examples into a C++03-specific directory, and added a new directory for C++11-specific examples. A limited subset of the C++03 examples have been converted to their C++11 equivalents.
- Various SSL enhancements. Thanks go to Nick Jones, on whose work these changes are based.
  - Added support for SSL handshakes with re-use of data already read from the wire. New overloads of the ssl::stream<> class's handshake() and async_handshake() functions have been added. These accept a ConstBufferSequence to be used as initial input to the ssl engine for the handshake procedure.
  - Added support for creation of TLSv1.1 and TLSv1.2 ssl::context objects.
  - Added a set_verify_depth() function to the ssl::context and ssl::stream<> classes.
  - Added the ability to load SSL certificate and key data from memory buffers. New functions, add_certificate_authority(), use_certificate(), use_certificate_chain(), use_private_key(), use_rsa_private_key() and use_tmp_dh(), have been added to the ssl::context class.
  - Changed ssl::context to automatically disable SSL compression by default. To enable, use the new ssl::context::clear_options() function, as in my_context.clear_options(ssl::context::no_compression).
- Fixed a potential deadlock in signal_set implementation.
- Fixed an error in acceptor example in documentation #8421.
- Fixed copy-paste errors in waitable timer documentation #8602.
- Added assertions to satisfy some code analysis tools #7739.
- Fixed a malformed #warning directive #7939.
- Fixed a potential data race in the Linux epoll implementation.
- Fixed a Windows-specific bug, where certain operations might generate an error_code with an invalid (i.e. NULL) error_category #8613.
- Fixed basic_waitable_timer's underlying implementation so that it can handle any time_point value without overflowing the intermediate duration objects.
- Fixed a problem with lost thread wakeups that can occur when making concurrent calls to run() and poll() on the same io_service object #8354.
- Fixed implementation of asynchronous connect operation so that it can cope with spurious readiness notifications from the reactor #7961.
Chrono:
- Fixed Bugs:
  - #8079 Chrono memory leak
  - #8318 BOOST_FORCEINLINE constructors of time_point and duration
  - #8367 chrono does not compile with clang from XCode 4.5.2 with -std=c++11 -stdlib=libc++ and -arch armv7
  - #8370 typo in chrono reference
  - #8435 Can't compile Chrono on HP-UX due to no CLOCK_REALTIME macro.
Circular Buffer:
- Fixed warnings (#8032).
Container:
- Added experimental static_vector class, based on Andrew Hundt's and Adam Wulkiewicz's high-performance varray class.
- Speed improvements in vector constructors/copy/move/swap, dispatching to memcpy when possible.
- Support for BOOST_NO_EXCEPTIONS #7227.
- Fixed bugs #7921, #7969, #8118, #8294, #8553.
Context:
- Support for SPARC architecture added.
Coroutine:
- Support for segmented stacks (stack grows on demand) added.
- #7805 Typo
- #7972 GCC warnings
- #7988 C++11 range-for
- #8023 Using iterator traits
- #8024 Create const_iterator
- #8101 Postfix operator++ for iterator
- #8526 memory leak
- #8544 calling managed DLL
Geometry:
- Additional functionality
  - added Spatial Index, developed for Boost.Geometry by Adam Wulkiewicz. The spatial index was originally started by Federico J. Fernandez during the Google Summer of Code 2008 program, mentored by Hartmut Kaiser.
  - added SVG-output, this was already in extensions for several years
- Documentation
  - small fixes of missing words
- Bugfixes
  - collinear opposite segments did sometimes (in circles) have a robustness issue, fixed
  - fixed insertion of false intersection point (found by buffer)
  - applied patch of Vladimir Petrovic for debugging traversals
- Solved tickets
  - 7462 degenerate union result for float, fixed
  - 7465 wrong construtors access type in scale_transformer class, fixed
  - 7802 cart_intersect.hpp unused parameter warnings, fixed
  - 8254 faulty intersection, fixed
  - 8393 polygon model doesn't adhere to stated Polygon concept rules, doc updated.
  - 8403 silenced compiler warning C4127: conditional expression is constant
  - 8405 silenced compiler warning C4189: '...' : local variable is initialized but not referenced
- Internal changes
  - Made several algorithms variant-aware (append, area, clear, convert, equals, length, num_points)
Graph:
- Bugs fixed from Trac: #6780, #7016, #7155, #7845, #7863, #7877, #8166, #8192, #8398, #8411, #8427, #8428, #8434, #8490, #8681.
- Added updates to VF2 subgraph isomorphism from Jakob Lykke Andersen and Flavio De Lorenzi.
- Added maximum adjacency search from Fernando Vilas.
- Added timeout support from Brammert Ottens to resource-constrained shortest paths (r_c_shortest_paths) algorithm.
- Various fixes to documentation and examples and removal of outdated compiler workarounds.
Interprocess:
- Added support for platform-specific flags to mapped_region (ticket #8030)
- Fixed bugs #7484, #7598, #7682, #7923, #7924, #7928, #7936, #8521, #8595.
- ABI breaking: Changed bootstamp function in Windows to use EventLog service start time as system bootup time. Previously used LastBootupTime from WMI was unstable with time synchronization and hibernation and unusable in practice. If you really need to obtain pre Boost 1.54 behaviour define BOOST_INTERPROCESS_BOOTSTAMP_IS_LASTBOOTUPTIME from command line or detail/workaround.hpp.
Intrusive:
- Added BOOST_NO_EXCEPTIONS support (bug #7849).
Iostreams:
- tee now works correctly for std::streams (#8315).
- Documentation fixes (#8385, #8460).
- Avoid warning from Clang's -Wimplicit-fallthrough (#8482).
Lexical cast:
- Converting to character pointer now triggers compile time assert instead of runtime #8334.
- Lexical cast is now capable of converting boost::int128_type and boost::uint128_type #7909.
- Changed internal stream buffer handling, now works with libc++ #8267, #7704.
- Restored getting address of lexical_cast function that was broken in 1.53.0 #7421.
- Fixed warnings, internals and tests #2558, #7949, #8162, #8369, #8547.
Math:
- Major reorganization to incorporate other Boost.Math like Integer Utilities (Greatest Common Divisor and Least Common Multiple), quaternions and octonions. Making new chapter headings.
- Added many references to Boost.Multiprecision and cpp_dec_float_50 as an example of a User-defined Type (UDT).
- Added Clang to list of supported compilers.
- Fixed constants to use a thread-safe cache of computed values when used at arbitrary precision.
- Added finding zeros of Bessel functions cyl_bessel_j_zero, cyl_neumann_zero, airy_ai_zeros and airy_bi_zeros(by Christopher Kormanyos).
- More accuracy improvements to the Bessel J and Y functions from Rocco Romeo.
- Fixed nasty cyclic dependency bug that caused some headers to not compile #7999.
- Fixed bug in __tgamma that caused spurious overflow for arguments between 142.5 and 143.
- Fixed bug in raise_rounding_error that caused it to return an incorrect result when throwing an exception is turned off #7905.
- Added minimal __float128 support.
- Fixed bug in edge-cases of poisson quantile #8308.
- Adjusted heuristics used in Halley iteration to cope with inverting the incomplete beta in tricky regions where the derivative is flatlining. Example is computing the quantile of the Fisher F distribution for probabilities smaller than machine epsilon. See ticket #8314.
Meta State Machine:
- Bugfix: Exit points broken for the favor_compile_time policy.
- Bugfix: copy breaks exit points of subsubmachines.
- Bugfix: #8046
Move:
- Fixed bugs #7969), #8231).
Multiprecision:
- Breaking change renamed rational_adapter to rational_adaptor.
- Add support for MPFI.
- Add logged_adaptor.
- Add support for 128-bit floats via GCC's __float128 or Intel's _Quad data types.
- Add support for user-defined literals in cpp_int, improve constexpr support.
- Fixed bug in integer division of cpp_int that results in incorrect sign of cpp_int when both arguments are small enough to fit in a double_limb_type. See 8126.
- Fixed bug in subtraction of a single limb in cpp_int that results in incorrect value when the result should have a 0 in the last limb: 8133.
- Fixed bug in cpp_int where division of 0 by something doesn't get zero in the result: 8160.
- Fixed bug in some transcendental functions that caused incorrect return values when variables are reused, for example with a = pow(a, b). See 8326.
Polygon:
- Updates and fixes to the Voronoi documentation.
- Bugs fixed from Trac: #8026, #8197, #8257.
PropertyMap:
- Added compose_property_map from Guillaume Pinot.
Range:
- Bug fixes:
  - #6944 Some Range concepts use the incorrect Iterator concept
  - #7407 istream_range does not compile with wcin
  - #7408 istream_range should not pull istream
  - #7731 irange doesn't end iteration properly when step_size is 3 or more
  - #7827 [range] cant compile r | indexed to range algorithm
  - #8338 Iterator range does not work with pointer to array as iterator
  - #8453 Incorrect configuration macro BOOST_NO_PARTIAL_TEMPLATE_SPECIALIZATION
Signals:
- No longer actively maintained, so it is deprecated. Use Signals2 for new development.
Thread:
- New Features:
  - #7285 C++11 compliance: Allow to pass movable arguments for call_once.
  - #7445 Async: Add future<>.then
  - #7449 Synchro: Add a synchronized value class
- Fixed Bugs:
  - #4878 MinGW 4.5.0 undefined reference to bool interruptible_wait(detail::win32::handle handle_to_wait_for,detail::t imeout target_time).
  - #4882 Win32 shared_mutex does not handle timeouts correctly.
  - #5752 boost::call_once() is unreliable on some platforms
  - #6652 Boost.Thread shared_mutex.hpp:50:99: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
  - #6843 [Intel C++] Compile Errors with '#include <atomic>'
  - #6966 future boost::future_category inconsistent dll linkage
  - #7720 exception lock_error while intensive locking/unlocking of mutex
  - #7755 Thread: deadlock with shared_mutex on Windows
  - #7980 Build error: msvc-11.0 and BOOST_THREAD_DONT_USE_DATETIME
  - #7982 pthread_delay_np() parm compile error on AIX
  - #8027 thread library fails to compile with Visual Studio 2003
  - #8070 prefer GetTickCount64 over GetTickCount
  - #8136 boost::this_thread::sleep_for() sleeps longer than it should in Windows
  - #8212 Boost thread compilation error on Solaris 10
  - #8237 fix documentation for 'thread_group'
  - #8239 barrier::wait() not marked as interruption_point
  - #8323 boost::thread::try_join_for/try_join_until may block indefinitely due to a combination of problems in Boost.Thread and Boost.Chrono
  - #8337 The internal representation of "std::string(this->code()->message())" escapes, but is destroyed when it exits scope.
  - #8371 C++11 once_flag enabled when constexpr is not available
  - #8443 Header file inclusion order may cause crashes
  - #8451 Missing documented function 'boost::scoped_thread::joinable'
  - #8530 [Coverity] Unused variable thread_handle, uninitialized variable cond_mutex in thread/pthread/thread_data.hpp
  - #8596 With C++0x enabled, boost::packaged_task stores a reference to function objects, instead of a copy.
Type Traits:
- New type traits implemented #8189:
  - is_nothrow_move_constructible
  - is_nothrow_move_assignable
  - has_trivial_move_assign
  - has_trivial_move_constructor
uBLAS:
- #6511 Division by scalar should use enable_if<>
- #7297 Make the free functions 'num_columns' and 'num_rows' support the uBLAS traits system and better work with expression types
- #6010 fixed linkage problems in assignment.hpp
- updated doc
Unordered:
- Some very basic noexcept support.
Utility:
- Fix basic_string_ref::find (#8067).
- Fix string_ref's logical operators.
- Update noncopyable for C++11 (#6578).
- Fix noncopyable compiler warning when used in DLL interface (#6935).
- Fix using boost::addressof with boost::function on SolarisStudio compiler (#7079).
- Disable annoying MSVC warning about operator comma (#7663)
Variant:
- Now uses new type traits from Boost.TypeTrait to detect noexcept constructors and assignment operators #8296. This shall increase performance of boost::variant for many types in C++11.
- Multivisitation implemented #8459.
- Documentation updated to reflect C++11 features support.
Wave:
- See the Changelog for details.
xpressive:
- Remove unused variables, fixes #8039
- Avoid name clash with macro None in glx.h, fixes #8204
- Silence a gcc warning, fixes #8138

Compilers Tested

Boost's primary test compilers are:

Linux:
- GCC: 4.4.7, 4.5.3, 4.6.2, 4.6.3, 4.7.3
- GCC, C++98 mode: 4.7.3
- GCC, C++11 mode: 4.7.2, 4.7.3, 4.8.0
- Clang: 3.0, 3.1, 3.2
- Clang, C++11 mode: 3.2
OS X:
- GCC: 4.2
- Apple Clang: 4.2.1
- Apple Clang, C++11 mode: 4.2.1
Windows:
- GCC, mingw: 4.4.0, 4.4.7, 4.5.4, 4.6.3, 4.7.2, 4.8.0
- Visual C++: 8.0, 9.0, 10.0, 11.0
FreeBSD:
- GCC: 4.2.1

Boost's additional test compilers include:

Linux:
- Clang: 3.0, 3.1, 3.2, from Subversion
- Clang, with libc++: 3.2
- GCC: 4.4.7, 4.5.3, 4.6.2, 4.6.3, 4.7.2, 4.7.3
- GCC, C++98 mode: 4.7.3
- GCC, C++11 mode: 4.7.3, 4.8.0
OS X:
- Apple Clang: 4.2.1
- Apple Clang, C++11 mode: 4.2.1
- Clang: from Subversion
- Clang, C++11 mode: from Subversion
- GCC: 4.2
Windows:
- GCC, mingw: 4.4.0, 4.4.7, 4.5.4, 4.6.3, 4.7.2, 4.8.0
- Visual C++: 9.0, 10.0, 11.0
- Visual C++, Windows Mobile 5, with STLport: 9.0
AIX:
- IBM XL C/C++ Enterprise Edition: 12.1.0.1
FreeBSD:
- GCC: 4.2.1

Acknowledgements

Beman Dawes, Eric Niebler, Rene Rivera, Daniel James, Vladimir Prus and Marshall Clow managed this release.

Version 1.53.0

Mon, 4 Feb 2013 10:29:19 -0800

New Libraries

Atomic: C++11-style atomic<>, from Helge Bahmann, maintained by Tim Blechmann.
Coroutine: Coroutine library, from Oliver Kowalke.
Lockfree: Lockfree data structures, from Tim Blechmann.
Multiprecision: Extended precision arithmetic types for floating point, integer and rational arithmetic from John Maddock and Christopher Kormanyos.
Odeint: Solving ordinary differential equations, from Karsten Ahnert and Mario Mulansky.

News

This release contains a fix for ticket #7743, in Boost.Locale. For more details, see the security notice.

Updated Libraries

Algorithm:
- Fixed non-ASCII char in comment (#7781).
- Updated the Knuth-Morris-Pratt docs (#7656).
Array:
- Added support for boost::get and std::get (#7652)
Asio:
- Fixed some 64-to-32-bit conversion warnings (#7459).
- Fixed some small errors in documentation and comments (#7761).
- Fixed an error in the example embedded in basic_socket::get_option's documentation (#7562).
- Changed to use long rather than int for SSL_CTX options, to match OpenSSL (#7209).
- Changed to use _snwprintf to address a compile error due to the changed swprintf signature in recent versions of MinGW (#7373).
- Fixed a deadlock that can occur on Windows when shutting down a pool of io_service threads due to running out of work (#7552).
- Enabled the noexcept qualifier for error categories (#7797).
- Changed UNIX domain socket example to treat errors from accept as non-fatal (#7488).
- Added a small block recycling optimisation to improve default memory allocation behaviour.
Bimap:
- Refactor map_view_iterator to improve error messages.
- Fixed replace_(left/right/key/data) bug when using relations with info.
- Fixed vector_of and list_of views assign(size_type,value_type) bug.
- Fixed vector_of views operator[](size_type) and at(size_type) functions return value.
Chrono:
- Deprecated:
  - The chrono i/o version included in Boost.Chrono 1.2.x has been completly refactored in version 2.0.0
  - chrono I/O: The manipulators __duration_short, __duration_long are depreceated. You should use the parameterized form __duration_fmt or the renamed manipulators __duration_symbol and __duration_prefix instead.
  - chrono I/O: The __duration_punct<> facet is depreceated. You should use the __get_duration_style free function to get the informations and use the __duration_units facet for localization purposes.
  - When BOOST_CHRONO_VERSION==2 the preceding deprecated functions are not available.
- Fixes:
  - #7546 time_point<system_clock> output version 2 fails to compile
  - #7547 time_point<system_clock> input version 2 fails to compile
  - #7868 chrono_io parses time incorrectly (1.53 and 1.52)
Container:
- Fixed bug #7650.
- Improved vector's insertion performance.
- Changed again experimental multiallocation interface for better performance (still experimental).
- Added no exception support for those willing to disable exceptions in their compilers.
- Fixed GCC -Wshadow warnings.
- Replaced deprecated BOOST_NO_XXXX with newer BOOST_NO_CXX11_XXX macros.
Context:
- Support for iOS on ARM and MacOS X on x86 (32bit) added.
- Support for SEH Overwrite Protection on Win32.
Geometry:
- Bugfixes
  - avoid generating output polygons with interior rings below minimum size (e.g. one or two points)
  - geometry::disjoint for degenerate segments (patched by Karsten Ahnert)
  - problem in geometry::difference for missing handling tangency, reported by H2
  - fixed geometry::for_each for use with Lambda's
  - fixed geometry::comparable_distance point-linestring (and -range, -polygon)
- Additional functionality
  - combinations for geometry::disjoint: point/ring, point/polygon, point/multi_polygon
  - combinations for geometry::intersects: point/ring, point/polygon, point/multi_polygon
- Internal changes
  - updates in specializations/not_implemented for various algorithms (as in an earlier version, these changes are still going on; they take care for simplified structs, better error reporting, and automatized documentation)
  - fixes in unit tests
GIL:
- Fixed self-assignment warnings (#4919).
Graph:
- Fixed the following bugs from Trac: #3468, #4386, #5269, #7428, #7457, #7467, #7600, #7648, #7684, #7728, #7741, #7766, #7771, #7773, #7780, #7787, #7801 plus other bugs not in Trac.
- Added support for reading from GraphML files containing multiple graphs.
- Added versions of A* search specifically for trees, removing the need for a color map when it is acceptable to visit the same vertex multiple times.
- Added VF2 subgraph isomorphism algorithm (contributed by Flavio De Lorenzi).
Hash:
- Add support for boost::int128_type and boost::uint128_type where available.
- On platforms that are known to have standard floating point functions, don't use the automatic detection (#7221, #7470).
Interprocess:
- Fixed GCC -Wshadow warnings.
- Experimental multiple allocation interface improved and changed again. Still unstable.
- Replaced deprecated BOOST_NO_XXXX with newer BOOST_NO_CXX11_XXX macros.
- ABI breaking: changed node pool allocators internals for improved efficiency.
- Fixed bug #7795.
Intrusive:
- Fixed bugs #7174, #7529, #7815.
- Fixed GCC -Wshadow warnings.
- Added missing explicit keyword in several intrusive container constructors.
- Replaced deprecated BOOST_NO_XXXX with newer BOOST_NO_CXX11_XXX macros.
- Small documentation fixes.
Lexical cast:
- New character type detection algorithm for user defined types #6786.
- Documentation updates (#7582, #7831).
- Fixed bugs with std::array #7799.
- Fixed compilation with -ftrapv and numeric to numeric conversions #7814.
Locale:
- Security related bug fix, some invalid UTF-8 sequences where accepted as valid #7743
- Invalid Windows codepage names used #7386
- Fixed missing documentation, caused by a error in Doxygen formatting #7734
- Fixed missing std:: in some places #7701
- Spelling, grammar, typos fixes #7368, #7762
Math:
- Fixed issues #7325, #7415, #7416, #7183, #7649, #7694, #4445 and #7492.
- Fixed mistake in calculating pooled standard deviation in two-sample students t example #7402.
- Improve complex acos/asin/atan, see #7290, #7291.
- Improve accuracy in some corner cases of cyl_bessel_j and gamma_p/gamma_q thanks to suggestions from Rocco Romeo.
- Improve accuracy in Bessel J and Y with integer orders thanks to suggestions from Rocco Romeo.
MinMax:
- Fixed a misuse of the comma operator (#7752).
- Updated the docs to fix broken link (#7751).
Move:
- Better header segregation (bug #6524).
- Small documentation fixes
- Replaced deprecated BOOST_NO_XXXX with newer BOOST_NO_CXX11_XXX macros.
- Fixed #7830, #7832.
Polygon:
- Fixes:
  - #6366 Bug in boost::polygon::contains for polygon_90 type.
  - #7678 multiple definitions of bool boost::polygon::belongs(...) by multiple #include.
- Internal changes:
  - refactored point/segment/interval data/concept/traits.
  - added unit tests for point and interval data/concept/traits.
  - simplified transform.hpp to operate only in 2D.
  - removed point_3d data/concept/traits.
Random:
- Now compiles with exceptions disabled (#5399).
Range:
- Bug fixes:
  - #5603 the "range/any_range.hpp" header is not self-sufficient
  - #6103 boost::range_detail vs. boost::range::range_detail compiler error
- Documentation fixes:
  - #5160
  - #5314
  - #5440
  - #5775
  - #6212
  - #7585
  - #7843
  - #7916
  - #7926
Ratio:
- Fixes:
  - #7616 br_mul::nan - warning C4293: '<<' : shift count negative or too big, undefined behavior`.
Regex: Fixed Issues: #7744, #7644.
Smart Pointers:
- New Features:
  - Glen Fernandes provided implementations of make_shared and allocate_shared for arrays. They achieve a single allocation for an array that can be initialized with constructor arguments or initializer lists as well as overloads for default initialization and no value initialization. See the 'make_shared and allocate_shared for arrays' page for more information.
  - shared_ptr can now be used to hold a pointer to a dynamically allocated array. This is accomplished by using an array type (T[] or T[N]) as the template parameter.
  - Smart pointers now use explicit operator bool on C++11 compilers. This can break code that passes a smart pointer to a function taking a bool, or that returns a smart pointer from a function with a bool return type. Please use p != 0 or !!p in such cases.
StringAlgo:
- Fixed a bug where it wouldn't find overlapping patterns (#7784).
- Disambiguated some calls to insert (#7346).
Thread:
- Deprecated features:
  - Deprecated features since boost 1.53 will be available only until boost 1.58.
  - C++11 compliance: packaged_task<R> is deprecated, use instead packaged_task<R()>.
  - #7537 deprecate Mutex::scoped_lock and scoped_try_lock and boost::condition
- New Features:
  - #6270 C++11 compliance: Add thread constructor from movable callable and movable arguments
  - #7279 C++11 compliance: Add noexcept in system related functions
  - #7280 C++11 compliance: Add promise::...at_thread_exit functions
  - #7281 C++11 compliance: Add ArgTypes to packaged_task template.
  - #7282 C++11 compliance: Add packaged_task::make_ready_at_thread_exit function
  - #7412 C++11 compliance: Add async from movable callable and movable arguments
  - #7413 C++11 compliance: Add async when the launch policy is deferred.
  - #7414 C++11 compliance: future::get post-condition should be valid()==false.
  - #7422 Provide a condition variable with zero-overhead performance penality.
  - #7444 Async: Add make_future/make_shared_future.
  - #7540 Threads: Add a helper class that join a thread on destruction.
  - #7541 Threads: Add a thread wrapper class that joins on destruction.
  - #7575 C++11 compliance: A future created by async should "join" in the destructor.
  - #7587 Synchro: Add strict_lock and nested_strict_lock.
  - #7588 Synchro: Split the locks.hpp in several files to limit dependencies.
  - #7590 Synchro: Add lockable concept checkers based on Boost.ConceptCheck.
  - #7591 Add lockable traits that can be used with enable_if.
  - #7592 Synchro: Add a null_mutex that is a no-op and that is a model of UpgardeLockable.
  - #7593 Synchro: Add a externally_locked class.
  - #7594 Threads: Allow to disable thread interruptions.
- Fixed Bugs:
  - #7464 BOOST_TEST(n_alive == 1); fails due to race condition in a regression test tool.
  - #7657 Serious performance and memory consumption hit if condition_variable methods condition notify_one or notify_all is used repeatedly.
  - #7665 this_thread::sleep_for no longer uses steady_clock in thread.
  - #7668 thread_group::join_all() should check whether its threads are joinable.
  - #7669 thread_group::join_all() should catch resource_deadlock_would_occur.
  - #7671 Error including boost/thread.hpp header on iOS.
  - #7672 lockable_traits.hpp syntax error: "defined" token misspelled.
  - #7798 boost::future set_wait_callback thread safety issues.
  - #7808 Incorrect description of effects for this_thread::sleep_for and this_thread::sleep_until.
  - #7812 Returns: cv_status::no_timeout if the call is returning because the time period specified by rel_time has elapsed, cv_status::timeout otherwise.
  - #7874 compile warning: thread.hpp:342: warning: type attributes are honored only at type definition.
  - #7875 BOOST_THREAD_THROW_IF_PRECONDITION_NOT_SATISFIED should not be enabled by default.
  - #7882 wrong exception text from condition_variable::wait(unique_lock<mutex>&).
  - #7890 thread::do_try_join_until() is missing a return type.
Unordered:
- Remove support for the old pre-standard variadic pair constructors, and equality implementation. Both have been deprecated since Boost 1.48.
- More internal implementation changes, including a much simpler implementation of erase, and removed more deprecated config macros.
Utility:
- Added string_ref, a non-owning reference to a contiguous sequence of characters.
Variant:
- Added rvalue constructors and rvalue assignment operators (for C++11 compatible compilers only). Library now can be used with move-only types (#7620, #7718).
Wave:
- See the Changelog for details.
xpressive:
- Accomodate recent smart pointer changes (#7809).

Updated Tools

Boost Build System:
- Qt5 toolset
- improved rcc support (#7576)

Compilers Tested

Boost's primary test compilers are:

Linux:
- GCC: 4.1.2, 4.2.4, 4.4.4, 4.5.3, 4.6.3, 4.7.2
- GCC, C++11 mode: 4.4.4, 4.5.3, 4.6.3, 4.7.2
- Intel: 11.1, 12.1
- LLVM Clang: 2.8
- LLVM Clang, with libc++: 3.2
OS X:
- GCC: 4.4.7
- GCC, C++11 mode: 4.4.4
- Intel: 11.1, 12.0
Windows:
- Visual C++: 9.0, 10.0
FreeBSD:
- GCC: 4.2.1, 32 and 64 bit

Boost's additional test compilers include:

Linux:
- Cray: 4.6.1
- Clang: from subversion
- LLVM Clang, with libc++: 3.2
- GCC: 4.2.4, 4.4.4, 4.5.3, 4.6.3, 4.7.1
- GCC, C++11 mode: 4.4.4, 4.5.3, 4.6.3, 4.7.1, 4.7.2
- pgCC: 11.9
- Intel: 10.1, 11.1, 12.1
- Intel, C++11 mode: 13.0.1
- Visual Age:
OS X:
- Clang: from subversion
- Clang, C++11 mode: from subversion
- Intel: 11.1, 12.0
- GCC: 4.4.7
- GCC, C++11 mode: 4.4.4
Windows:
- Visual C++: 10.0, 11.0
- Visual C++ with STLport: 9.0
- Visual C++, Windows Mobile 5, with STLport: 9.0
AIX:
- IBM XL C/C++ Enterprise Edition: V12.1.0.1

Acknowledgements

Beman Dawes, Eric Niebler, Rene Rivera, Daniel James, Vladimir Prus and Marshall Clow managed this release.

Version 1.52.0

Mon, 5 Nov 2012 08:05:58 -0800

Updated Libraries

Accumulators:
- Fix long-standing dependency tracking bug, #7409
Config:
- Define BOOST_NO_SFINAE_EXPR for gcc-4.4, since the support was found to be too buggy.
Chrono:
- New Features:
  - #5980 Enhance chrono I/O with H. Hinnant proposal proposal which has the advantage to provide I/O for system clocks using the Gregorian Calendar.
  - #5981 Add i/o state savers for duration and time_point formatting state.
  - #7059 Add low level i/o facilities.
- Deprecated features:
  - The chrono i/o version included in Boost.Chrono 1.2.x has been completly refactored in version 2.0.0
  - chrono I/O: The manipulators __duration_short, __duration_long are depreceated. You should use the parameterized form __duration_fmt or the renamed manipulators __duration_symbol and __duration_prefix instead.
  - chrono I/O: The __duration_punct<> facet is deprecated. You should use the __get_duration_style free function to get the informations and use the __duration_units facet for localization purposes.
  - When BOOST_CHRONO_VERSION==2 the preceding deprecated functions are not available.
- Fixes:
  - #7381 C++11 compliance: unresolved symbol when assigning a constexpr duration to a non-const local variable.
  - #7479 Compile fails with compilers supporting constexpr fails if the standard library doesn't provides the constexpr interface
- Would not fix:
  - #6871 chrono_io.hpp: operator<<(ostream& os, ...) modifies the state of os. The neww io interface provided in version 2 solves this issue. You should move to the new version.
Container:
- Improved stable_vector's template code bloat and type safety.
- Changed typedefs and reordered functions of sequence containers to improve doxygen documentation.
- Fixed bugs #6615, #7139, #7215, #7232, #7269, #7439.
- Implemented LWG Issue #149 (range insertion now returns an iterator) & cleaned up insertion code in most containers
- Corrected aliasing errors.
DateTime:
- Document BOOST_DATE_TIME_NO_LIB (#6077).
- Fix nth_as_str (#7022).
- Fix some warnings (#7234).
Foreach:
- Fix alignment warning on gcc.
Function:
- Move constructors and move assignment operators added (only for compilers with C++11 rvalue references support) #7330.
Graph:
- Fixed bugs #6950, #7226,#7308, #7327, #7338, #7341, #7378, #7380, #7398, and #7428, plus others not in Trac.
Hash:
- Restore enum support, which was accidentally removed in the last version (#7437).
- New floating point hasher - will hash the binary representation on more platforms, which should be faster.
Interprocess:
- Added shrink_by and advise functions in mapped_region.
- ABI breaking: Reimplemented message_queue with a circular buffer index (the old behavior used an ordered array, leading to excessive copies). This should greatly increase performance but breaks ABI. Old behaviour/ABI can be used undefining macro BOOST_INTERPROCESS_MSG_QUEUE_CIRCULAR_INDEX in boost/interprocess/detail/workaround.hpp
- Improved message_queue insertion time avoiding priority search for common cases (both array and circular buffer configurations).
- Implemented interproces_sharable_mutex and interproces_condition_any.
- Improved offset_ptr performance.
- Added integer overflow checks.
Iterator:
- Fixed:
  - #5825 constructing function_input_iterator without consuming an item
  - #7194 Error in documentation of make_function_input_iterator
- Breaking changes:
  - Due to the fix for #5825, a function_input_iterator will no longer make unnecessary invokations to the wrapped nullary function. For example, constructing an end iterator will now not trigger an invokation; and dereferencing-and-incrementing an iterator N times will trigger N invokations, not N+1 as before. User code that relied on the old behavior will need to be adjusted.
Lexical cast:
- Restored compilation on MSVC-2003 (was broken in 1.51.0) #7255.
- Added lexical_cast(const CharType* chars, std::size_t count) function overload. #6663.
- Fixed bug #7228.
Math:
- Added Airy functions and Jacobi Elliptic functions.
- In several distributions (particulary the Students T) corrected moments for small degrees of freedom #7177 (reported by Thomas Mang).
- Corrected failure to detect bad parameters in many distributions #6934 (reported by Florian Schoppmann) by adding a function check_out_of_range to test many possible bad parameters. This test revealed several distributions where the checks for bad parameters were ineffective, and these have been rectified.
- Fixed issue in Hankel functions that causes incorrect values to be returned for x < 0 and ν odd, see #7135.
- In non-central T permitted infinite degrees of freedom #7259 implemented using the normal distribution (requested by Thomas Mang). Also much enhanced accuracy for large degrees of freedom and/or large non-centrality parameters by switching to use the Students t distribution (or Normal distribution for infinite degrees of freedom) centered at delta, when delta / (4 * v) < epsilon for the floating-point type in use. See #7259. It was also found that the incomplete beta was suffering from serious cancellation errors when degrees of freedom was very large. (That has now been fixed in our code, but any code based on Didonato and Morris's original papers (probably every implementation out there actually) will have the same issue).
- Fixed minor issues #6517, #6362, #7053, #2693, #6937, #7099.
Phoenix:
- Make Phoenix work with decltype-based boost::result_of.
Polygon:
- Included Voronoi diagram extensions.
- Introduced new Segment concept.
- Fixed compilation issues.
Proto:
- The data parameter to primitive transforms can now optionally have slots indexed by key.
- Primitive transforms can now operatate on temporary expressions that are non-const qualified.
- Add callable function object types for the free functions in <iterator> and also for some Boost.Range functions.
- Boost.MPL algorithms work on Proto expression nodes.
- proto::pass_through primitive transform now accepts an optional Domain template parameter for specifying the target domain of the resulting expression.
Ratio:
- Features:
  - Replace the short_name and long_name functions by symbol and prefix functions respectively.
- Deprecated:
  - The ratio_string<>::short_name and ratio_string<>::long_name are deprecated. Use ratio_string<>::symbol and ratio_string<>::prefix respectively. These functions be removed in 1.55.
- Fixes:
  - #7478 Compiles fails with compilers supporting char16_t and char32_t fails if the library doesn't provides std::u16string and std::u32string.
Result_of:
- Switch boost::result_of to use decltype on compilers for which support is deemed "good enough". That means if the compiler implements n3276. (For now, that only includes very recent versions of clang.)
- boost::result_of is now "sfinae-friendly" when it uses decltype. See n3436.
Thread:
- Deprecated Features: Deprecated features since boost 1.50 available only until boost 1.55. These deprecated features will be provided by default up to boost 1.52. If you don't want to include the deprecated features you could define BOOST_THREAD_DONT_PROVIDE_DEPRECATED_FEATURES_SINCE_V3_0_0. Since 1.53 these features will not be included any more by default. Since this version, if you want to include the deprecated features yet you could define BOOST_THREAD_PROVIDE_DEPRECATED_FEATURES_SINCE_V3_0_0. These deprecated features will be only available until boost 1.55, that is you have yet 1 year to move to the new features.
  - Time related functions don't using the Boost.Chrono library, use the chrono overloads instead.
- Breaking changes when BOOST_THREAD_VERSION==3 (Default value since Boost 1.53): There are some new features which share the same interface but with different behavior. These breaking features are provided by default when BOOST_THREAD_VERSION is 3, but the user can however choose the version 2 behavior by defining the corresponding macro. As for the deprecated features, these broken features will be only available until boost 1.55.
  - #6229 C++11 compliance & Breaking change: Rename the unique_future to future following the c++11.
  - #6266 C++11 compliance & Breaking change: thread destructor should call terminate if joinable.
  - #6269 C++11 compliance & Breaking change: thread move assignment should call terminate if joinable.
- New Features:
  - #4710 C++11 compliance: Missing async().
  - #7283 C++11 compliance: Add notify_all_at_thread_exit.
  - #7345 C++11 compliance: Add noexcept to recursive mutex try_lock.
- Fixed Bugs:
  - #2361 thread_specific_ptr: document nature of the key, complexity and rationale.
  - #2797 Two problems with thread_specific_ptr.
  - #5274 failed to compile future.hpp with stlport 5.1.5 under msvc8.1, because of undefined class.
  - #5431 compile error in Windows CE 6.0(interlocked).
  - #5752 boost::call_once() is unreliable on some platforms.
  - #7045 Thread library does not automatically compile date_time.
  - #7173 wrong function name interrupt_point().
  - #7200 Unable to build boost.thread modularized.
  - #7220 gcc 4.6.2 warns about inline+dllimport functions.
  - #7238 this_thread::sleep_for() does not respond to interrupt().
  - #7245 Minor typos on documentation related to version 3.
  - #7272 win32/thread_primitives.hpp: (Unneccessary) Warning.
  - #7284 Clarify that there is no access priority between lock and shared_lock on shared mutex.
  - #7329 boost/thread/future.hpp does not compile on HPUX.
  - #7336 BOOST_THREAD_DONT_USE_SYSTEM doesn't work.
  - #7349 packaged_task holds reference to temporary.
  - #7350 allocator_destructor does not destroy object
uBLAS:
- improved performance of inplace_solve (issue #4024)
- fixed coordinate_matrix for use with gcc 4.7 (issue #7363)
Unordered:
- In assignment, reuse existing nodes where possible.
- Fix bugs when erasing ranges (#7471).
- Some work on the implementation.
Uuid:
- Fixes #6118, #6788, #7375.
- #7128 - fixed bug in sha1.hpp for messages longer than 536,870,912 bytes.
Wave:
- See the Changelog for details.
xpressive:
- Make sub_match work with Boost.Range. Fixes #7237.

Compilers Tested

Boost's primary test compilers are:

Linux:
- GCC: 4.2.4, 4.3.4, 4.4.3, 4.5.3, 4.6.2, 4.7.2
- GCC, C++11 mode: 4.3.4, 4.4.3, 4.5.3, 4.6.2
- Intel: 11.1, 12.0, 12.1
- LLVM Clang: 2.8
OS X:
- GCC: 4.4.4
- GCC, C++11 mode: 4.4.4
- Intel: 11.1, 12.0
Windows:
- GCC, mingw: 4.4.0, 4.4.7, 4.5.4, 4.6.3, 4.7.0
- Visual C++: 8.0, 9.0, 10.0
FreeBSD:
- GCC: 4.2.1, 32 and 64 bit

Boost's additional test compilers include:

Linux:
- Cray: 8.0
- Clang: from subversion
- LLVM Clang:
- GCC: 4.2.4, 4.3.4, 4.4.4, 4.5.3, 4.6.2, 4.6.3, 4.7.0, 4.7.1, 4.7.2
- GCC, C++11 mode: 4.3.4, 4.4.4, 4.5.3, 4.6.3, 4.7.1
- pgCC: 11.9
- Intel: 10.1, 11.1, 12.0, 12.1
- Visual Age: 10.1
OS X:
- Clang: from subversion
- Clang, C++11 mode: from subversion
- Intel: 11.1, 12.0
- GCC: 4.4.4
- GCC, C++11 mode: 4.4.4
Windows:
- Visual C++: 8.0, 9.0, 10.0, 11.0
- Visual C++ with STLport: 9.0
- Visual C++, Windows Mobile 5, with STLport: 9.0
- GCC, mingw: 4.4.0, 4.4.7, 4.5.4, 4.6.3, 4.7.0
AIX:
- IBM XL C/C++ Enterprise Edition: V12.1.0.0
FreeBSD:
- GCC: 4.2.1, 64 bit
Solaris:
- Sun: 5.10

Acknowledgements

Beman Dawes, Eric Niebler, Rene Rivera, Daniel James, Vladimir Prus and Marshall Clow managed this release.