Boost 1.57.0 发布，可移植的 C++ 标准库

11月23日开源中国源创会年度（北京万豪酒店）千人盛典正在报名中

Boost 1.57.0 发布了，Boost库是一个经过千锤百炼、可移植、提供源代码的C++库，作为标准库的后备，是C++标准化进程的发动机之一。 Boost库由C++标准委员会库工作组成员发起，在C++社区中影响甚大，其成员已近2000人。 Boost库为我们带来了最新、最酷、最实用的技术，是不折不扣的“准”标准库。

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改进记录：

Updated Libraries

• Any:

• RTTI is not required any more (TypeIndex                library is used for RTTI emulation)

• Fixed #8958

• Asio:

• Fixed the kqueue reactor so that it works on FreeBSD                (#10606).

• Fixed an issue in the kqueue reactor which resulted                in spinning when using serial ports on Mac OS (#10496).

• Fixed kqueue reactor support for read-only file                descriptors (#10367).

• Fixed a compile error when using the /dev/poll                reactor (#10350, #10572).

• Changed the Windows backend to use WSASocketW,                as WSASocketA has                been deprecated (#10534).

• Fixed some warnings reported by Visual C++ 2013 (#10376).

• Fixed integer type used in the WinRT version of the byte-order conversion                functions (#10539).

• Changed documentation to indicate that use_future                and spawn()                are not made available when including the asio.hpp                convenience header (#10567).

• Explicitly marked asio::strand                as deprecated. Use asio::io_service::strand                instead.

• Circular Buffer:

• Fixed some warnings and move_if_noexcept                from Boost.Move is used #7888

• Config:

• BOOST_HAS_PRAGMA_DETECT_MISMATCH                macro was added

• Container:

• Trac                      #10263 ("AIX 6.1 bug with sched_yield() function                      out of scope").

• GitHub                      #16: Fix iterators of incomplete type containers.                      Thanks to Mikael Persson.

• Added support for initializer_list.                Contributed by Robert Matusewicz.

• Fixed double destruction bugs in vector and backward expansion capable                allocators.

• Fixed bugs:

• Coroutine:

• optionally register stacks with valgrind

• #10386 MSVC link error in asymmetric_coroutine.hpp: symbol already                defined

• #10536 call to 'begin(...pull_coroutine< R > & c)'                is ambiguous

• Flyweight:

• Added serialization support via Boost                Serialization.

• flyweight default                constructor was made explicit in Boost 1.56, which introduces a regression                in some initialization scenarios. The former non-explicit default                constructor has been restored (ticket #10439).

• Geometry:

• Several fixes of bugs in algorithm buffer

• Bug in point_on_surface() for CCW Polygons (extreme_points())                      and numerical issue (thanks to Matt Amos)

• Bug in disjoint() for A/A fixed by replacement of point_on_surface()                      with point_on_border() (thanks to Matt Amos)

• The result of convex_hull(), duplicated Point in open output,                      too small number of Points for 1- and 2-Point input

• Imprecision for big coordinates in centroid(), fixed by Points                      translation (related with ticket 10643)

• for_each_segment() not taking into account the last segment                      of open Geometry

• 8402                      Implicit conversion warnings

• 9354                      Bug in winding strategy affecting within() and covered_by()                      for non-cartesian coordinate systems

• 10177                      Missing include

• 10345                      Distance fails to compile for some coordinate types

• 10398                      Wrong neighbour check in buffer, calculating turns

• 10421                      Invalid Point-Box distance for spherical CS

• 10615                      Rtree constructor feature request

• 10643                      Invalid point_on_surface() result for big coordinates

• 10668                      Implicit conversion warnings (duplicated 8402)

• The support of parameters convertible to value_type in rtree                      insert(), remove() and count() functions

• Improvements

• Solved tickets

• Bugfixes

• Interprocess:

• Trac                      #10262 ("AIX 6.1 bug with variable definition                      hz").

• Trac                      #10229 ("Compiling errors in interprocess\detail\os_file_functions.hpp").

• Trac                      #10506 ("Infinite loop in create_or_open_file").

• GitHub                      Pull #11 ("Compile fix for BOOST_USE_WINDOWS_H").

• Removed unique_ptr,                now forwards boost::interprocess::unique_ptr to the general purpose                boost::movelib::unique_ptr class from Boost.Move. This implementation is closer                to the standard std::unique_ptr                implementation and it's better maintained.

• Fixed bugs:

• Reorganized Doxygen marks to obtain a better header reference.

• Intrusive:

• GitHub                      Pull #12: Fix MSVC14 warning C4456: declaration of                      'x_parent_right' hides previous local declaration

• Boost                      Trac #10520: Conversion warning in intrusive/detail/utilities.hpp

• Boost                      Trac #10469: Erasing from intrusive unordered_multiset                      with optimize_multikey goes into an infinite loop

• Experimental version of node checkers, contributed by Matei David.                Many thanks!

• Implemented N3644:                Null Forward Iterators from C++14.

• Fixed bugs:

• Iterator:

• Most components of the library were moved into the boost::iterators namespace. For backward                compatibility the components are also accessible in the boost namespace.

• Iterator operators are now conditionally defined based on the iterator                category.

• Some of the internal components of the library were made public (minimum_category, for example).

• Lexical Cast:

• Some internal changes, library now consist of multiple headers instead                of a single one #10391, #10173

• Math:

• Added Hyperexponential Distribution.

• Fix some spurious overflows in the incomplete gamma functions (with                thanks to Rocco Romeo).

• Fix bug in derivative of incomplete beta when a = b = 0.5 - this                also effects several non-central distributions, see issue 10480.

• Fixed some corner cases in function round.

• Don't support 80-bit floats in cstdfloat.hpp if standard library                support is broken.

• Move:

• Added unique_ptr smart          pointer. Thanks to Howard Hinnant for his excellent unique_ptr emulation          code and testsuite.

• Added move_if_noexcept          utility. Thanks to Antony Polukhin for the implementation.

• Fixed bugs:

• Trac #9785:                "Compiler warning with intel icc in boost/move/core.hpp",

• Trac #10460:                "Compiler error due to looser throw specifier",

• Git Pull #3:                "Don't delete copy constructor when rvalue references                are disabled",

• MultiArray:

• Fixed a friend-declaration related warning for clang (thanks to Marcel                Raad).

• Multiprecision:

• Changed rational to float conversions to exactly round to nearest.

• Added improved generic float to rational conversions.

• Fixed rare bug in exponent function for cpp_bin_float.

• Fixed various minor documentation issues.

• Multi-index Containers:

• When std::tuples are available, these can                be used for lookup operations in indices equipped with composite                keys. boost::tuples are also supported for backwards                compatibility.

• Preprocessor:

• Added is_begin_parens and remove_parens.

• Added tuple functionality to parallel all array functionality.

• Fixed VC++ problems with empty tuple data.

• Updated internal is_empty to use superior variadic version when variadic                macros are supported.

• Updated clang to have same variadic support as gcc.

• Updated doc for new functionality.

• Thread:

• #6782                      call_once uses incorrect barrier intrinsic on Visual Studio

• #6787                      boost::thread::sleep() hangs if system time is rolled back

• #7665                      this_thread::sleep_for no longer uses steady_clock in thread

• #9307                      future::fallback_to assert with ERRORRRRR boost: mutex lock                      failed in pthread_mutex_lock: Invalid argument

• #9308                      future::async fails with terminate called throwing an exception                      when called with a lambda - clang-darwin-asan11

• #9310                      test_4648_lib fails on clang-darwin-asan11

• #9425                      Boost promise & future does not use supplied allocator                      for value storage

• #9558                      future continuations unit test hangs in get()/pthread_cond_wait()                      on Mac 10.7/32-bit/x86/darwin-4.2.1

• #9787                      [windows] Small duration value passed down to basic_timed_mutex::try_lock_until                      and condition_variable::wait_until can cause infinite or near                      infinite wait for win32

• #9880                      [windows] boost::condition_variable.timed_wait() exception                      if system time < 1970

• #10159                      GCC 4.4 error sorry, unimplemented

• #10196                      thread_specific_ptr does not support void*

• #10296                      Boost.Thread 1.56 rc1 does not compile on Mingw

• #10297                      Boost.Thread 1.56 rc1 hangs when built with clang on armhf

• #10340                      No boost::promise<T>::set_value(const T&) overload                      present in C++03 mode

• #10425                      Missing documentation for when_all/when_any.

• #10426                      Take in account the deferred futures in when_all.

• #10427                      Take in account the deferred and ready futures in when_any.

• #10428                      Adapt to new unique_ptr interface in Boost.Move

• #10465                      Missing implementation of when_all/when_any when the result                      is a tuple.

• #10476                      classes using BOOST_THREAD_MOVABLE_ONLY<T> dont satisfy                      is_copy_constructible<T>::value == false

• #10478                      Data race in boost/thread/future.hpp

• #10529                      The pthread/condition_variable_any constructor reports incorrect                      error code for pthread_cond_init

• #10563                      shared_future<R>::then should be const

• #6227                      Synchro: Use of variadic templates on Generic Locking Algorithms                      on compilers providing them

• #10298                      Synchro: Added queue views.

• #10300                      Async: Added generic_executor_ref.

• #10552                      Add make_valid_future

• New Experimental Features:

• Fixed Bugs:

• TypeIndex:

• BOOST_HAS_PRAGMA_DETECT_MISMATCH                is now used to detect ODR violations #10404

• Typos fixed #10294

• TypeTraits:

• Added new traits is_copy_assignable and is_final.

• Units:

• New unit system <boost/units/systems/information.hpp> units                for: bit, byte, nat, hartley and shannon,

• Add scale units for binary prefixes kibi, mebi, gibi, tebi, pebi,                zebi and yobi IEC prefixes

• Fix output of NaN on msvc-14

• Add support for C++11 numeric_limits::max_digits10 and ::lowest

• warning fixes

• Unordered:

• Fix the pointer typedef                in iterators (#10672).

• Fix Coverity warning (GitHub                #2).

• Utility:

• The next()                and prior()                functions taking distance arguments were reworked. The code now work                correctly when the distance is unsigned or both arguments are integers.                The new code relies on the availability of operators supported by                the first argument to select the correct implementation.

• uBLAS:

• added two new types: matrix_row and matrix_column facades . With                them, it is possible to access to the matrices as an array of rows                and an array of columns, respectively.

• added fixed_vector/fixed_matrix classes to represent small - fixed                size containers. Requires c++11 because it is using std::array

• fixed the long standing banded matrix bug (https://svn.boost.org/trac/boost/ticket/7549).

• the interface of matrices and vectors has been extended with cbegin,                cend, crbegin and crend member functions, as defined in c++11.

• removed doxygen documentation to make the distribution lighter

• removed warnings with MSVC for unused parameters

• changed the uBlas development folder structure (will not affect users                of the library)

• performed a very large overhaul with respect to warnings and errors                on various compilers. Apart for some hard to resolve warnings and                older compiler incompatibilities, compilations with uBlas will be                much cleaner now.

Compilers Tested

Boost's primary test compilers are:

• Linux:

• Clang: 3.0, 3.1, 3.2, 3.3, 3.4

• Clang, C++14: 3.5

• GCC: 4.4.7, 4.5.3, 4.6.4, 4.7.3, 4.8.1, 4.8.2

• GCC, C++98: 4.9.1

• GCC, C++11: 4.4.7, 4.8.2, 4.8.3, 4.9.1

• GCC, C++14: 4.9.1

• Intel: 13.1, 14.0

• Intel, C++11: 13.1, 14.0

• QCC: 4.4.2

• OS X:

• Apple Clang: 6.0

• Apple Clang, C++11: 6.0

• Apple Clang, C++14: 6.0

• GCC: 4.2.1, 4.9.1

• Intel: 12.0

• Windows:

• GCC, mingw: 4.4.0, 4.4.7. 4.5.4, 4.6.3, 4.7.2, 4.7.3, 4.8.0, 4.8.2,                4.9.0

• Visual C++: 8.0, 9.0, 10.0, 11.0, 12.0

• FreeBSD:

• GCC: 4.2.1

• QNX:

• QCC: 4.4.2

Boost's additional test compilers include:

• Linux:

• Clang: 3.0, 3.1, 3.2, 3.3, 3.4.2

• Clang, C++14: 3.5.0, trunk

• GCC: 4.4.7, 4.6.4, 4.7.3, 4.8.1, 4.8.2, 5.0 (experimental)

• GCC, C++11: 4.4.7, 4.8.2, 4.8.3, 4.9.1

• GCC, C++14: 4.9.1

• Intel: 11.1, 12.1, 13.0, 13.1, 14.0

• Intel, C++11: 13.1, 14.0

• OS X:

• Apple Clang: 6.0

• Apple Clang, C++11: 6.0

• Apple Clang, C++14: 6.0

• Clang: trunk

• Clang, C++11: trunk

• GCC: 4.2.1, 4.9.1

• Intel: 12.0

• Windows:

• GCC, mingw: 4.4.0, 4.4.7, 4.5.4, 4.6.3, 4.7.3, 4.8.0, 4.8.2, 4.9.0

• Visual C++: 8.0, 9.0, 10.0, 11.0, 12.0

• FreeBSD:

• GCC: 4.2.1

• QNX:

• QCC: 4.4.2