January 2008 - Boost - lists.boost.org

[type_traits] VC9/TR1 failures vs Boost
by Richard Webb 24 Jan '08

24 Jan '08

I've been running the Boost regression tests against VC9 with the beta TR1 feature pack, and raising some of the failures as bugs with MS. >From reading the standards, it seems that some of the test failures are in areas which have changed over time. The MS blog post @ <http://tinyurl.com/3b9ksc> mentions N2157 ( http://tinyurl.com/2r54lo ), so i assume that they're working on at least that revision. So, from the tests: -tr1_is_base_of_test (http://tinyurl.com/2hzmae) is failing because Boost thinks is_base_of<int, int> should be true and VC9 says it's false. n2157 has the example "is_base_of<int, int>::value // false", so VC looks correct here. -tr1_is_convertible_test (http://tinyurl.com/2dortk) has 2 sets of failures: 1) is_convertible<float,void>/is_convertible<void,void> are both false, and Boost expects both to be true. n2157 says "If To and From are void types, the result is true. However if only one of To or From is a void type, then the result is false", which is a change to the spec. In this case, both Boost and VC9 seem to be wrong in one case. 2)is_convertible<float,convertible_from<float&>> is_convertible<char,convertible_from<char&>> are both false. n2157 says "Given a type T, the TR1 is_convertible<T, T&>::value is true whereas this paper proposes false unless T is a non-volatile but const qualified type", which sounds like VC is correct here. Does anyone with a better grasp of the current requirements have any thoughts on this? Thanks, Richard Webb

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Persistence - Multi Index Container
by Avi Revivo 24 Jan '08

24 Jan '08

Hi All, A team in my development group is currently using a proprietary container with a functionality similar to the MultiIndexContainer except for an additional feature of using Memory Mapped File to store the container data. The proprietary container performance is poor with ot without using the mapped file. The memory mapped file feature is extermly important since the component must keep the entire state even if the system crushes. Inorder for them to use the Multi Index container they need some persistence feature. Serializing the container every 2 seconds or so is not possible since the container size will be too large (dozens of MB). Is there any solution or future plans to develop such a feature in the Multi Index Container and in other boost containers? Thanks in advance, Avi Revivo Nice Systems -- View this message in context: http://www.nabble.com/Persistence---Multi-Index-Container-tp15060575p150605… Sent from the Boost - Dev mailing list archive at Nabble.com.

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[review] Fast track review of Boost.Utility/Singleton begins today
by John Torjo 23 Jan '08

23 Jan '08

Hi all, Today starts the formal Fast-Track review of the Boost.Utility/Singleton library. This is a very useful utility, so I'm expecting lots of reviews ;) *Description* A Singleton describes a globally accessible and unique facility, typically implemented as a class with inaccessible constructors and a globally accessible function for clients to access a single instance which is created when accessed for the first time. This library provides three Singleton templates that share an identical interface : |- boost::singleton| : can be used to create Singletons with synchronized initialization. If further synchronization is required it has to be implemented by the user. |- boost::mutexed_singleton| : additionally ensures that concurrent access to the instance is mutually exclusive. In other words, only one thread can access the instance at a given time. |- boost::thread_specific_singleton| : instances exist once per thread. *Author* Tobias Schwinger *Download* Get it from here: http://www.boost-consulting.com/vault/index.php?action=downloadfile&filenam… Read documentation online here: http://torjo.com/tobias/ What to include in Review Comments ================================== Your comments may be brief or lengthy, but basically the Review Manager needs your evaluation of the library. If you identify problems along the way, please note if they are minor, serious, or showstoppers. Here are some questions you might want to answer in your review: * What is your evaluation of the design? * What is your evaluation of the implementation? * What is your evaluation of the documentation? * What is your evaluation of the potential usefulness of the library? * Did you try to use the library? With what compiler? Did you have any problems? * How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? * Are you knowledgeable about the problem domain? And finally, every review should answer this question: * Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion. Best, John Torjo - Review Manager - -- http://John.Torjo.com -- C++ expert ... call me only if you want things done right

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Boost thread suspend/resume
by 申和平 23 Jan '08

23 Jan '08

Hi,all We can create a thread very easily. While, I don’t know how to suspend and then resume it. Does anyone have any idea? Thanks, peace

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Trac open bugs - by assignee
by Marshall Clow 23 Jan '08

23 Jan '08

[ 213 open bugs today, 208 yesterday ] If you are maintaining a library, and have not logged into the trac system at <http://svn.boost.org/trac/boost/>, please do so ASAP. Until you do that, no tickets can be assigned to you, and will remain under "None". Instructions on working with tickets can be found at: <http://svn.boost.org/trac/boost/wiki/TicketWorkflow> and a mapping of user names to "real names" can be found at: <http://svn.boost.org/trac/boost/report/16> Bug summary 19 az_sw_dude 18 dgregor 15 djowel 14 grafik 13 None 12 doug_gregor 12 dave 12 agurtovoy 11 vladimir_prus 8 jsiek 7 bemandawes 7 anthonyw 5 witt 5 turkanis 5 johnmaddock 4 pdimov 4 igaztanaga 4 ebf 3 nesotto 3 jmaurer 3 danielw 3 danieljames 2 urzuga 2 ramey 2 pavol_droba 2 nasonov 2 matias 2 <Blank> 1 t_schwinger 1 speedsnail 1 shammah 1 samuel_krempp 1 rogeeff 1 marshall 1 kaalus 1 hljin 1 hkaiser 1 garcia 1 dlwalker 1 burbelgruff 1 andreas_huber69 1 aaron_windsor <Blank> 1307 [lambda] invalid boostbook <Blank> 1434 Boost.Preprocessor_ small fix for the documentation None 1068 Mersenne twister disables streaming for Visual C++ None 1094 Finding the correct library to link (feature request for pkg-config support)h None 1222 lambda::ret<T> should declare result_type. None 1247 Typos in "boost/random/additive_combine.hpp"_ lines 68-69 None 1270 uniform_smallint doesn't compile with lagged_fibonacci random number generators None 1493 SVN files making it through to install None 1515 [lambda] C4512 warnings from VC8.0 None 1544 uniform_01 w/ref template param causes ref to ref error None 1546 Method boost::random::uniform_int::operator()(engine_ value) is missing None 1570 Some boost headers aren't ready for gcc 4.3 None 1572 [lambda] smart pointer const-ness affects its contents None 1573 Broken URL in copyright boiler-plate None 1597 test aaron_windsor 778 top-level configure is broken agurtovoy 1001 gcc 4.1.2 segfaults on mpl/test/apply.cpp agurtovoy 1051 MPL header ordering triggers bug agurtovoy 1099 unable to iterate through a "non-explicitly-declared" mpl::set agurtovoy 1215 Boost 1.34.1_ mpl: Wrong workaround detection using MinGW32 (or.hpp_ line #33) agurtovoy 1317 has_xxx randomly broken in msvc agurtovoy 1469 [mpl] nested typedef of set has two different meanings agurtovoy 1476 always<> is not nullary. agurtovoy 1528 g++ 4.3.0 reports error because of redeclaration of next agurtovoy 1549 Boost.MPL: 'index_of' algorithm is not documented agurtovoy 1568 duplicate include guards agurtovoy 588 mpl::remove compile error with gcc 4.1.0 agurtovoy 640 documentation mistake andreas_huber69 1594 [statechart] 'fixed' : is not a member of 'std' anthonyw 1154 tss destruction segfaults in conjunction with dlopen/dlclose anthonyw 1168 [thread] tss crashes randomly anthonyw 1268 xtime_cmp changes to deal with overflow were reverted anthonyw 1470 Boost.Thread: Compilation errors with non-__cdecl calling convention anthonyw 1547 [thread] error C2065: 'NULL' : undeclared identifier in thread_primitives.hpp anthonyw 876 xtime documentation incomplete anthonyw 881 errors when build with Apache stdcxx az_sw_dude 1028 typo in boost header: date_time/time_defs.hpp az_sw_dude 1078 from_iso_string cannot read the output from to_iso_string az_sw_dude 1098 Urgent libboost-date-time1.33.1 : bugs on ia64 ? az_sw_dude 1147 date_time library contains global #define ERROR az_sw_dude 1160 warning: month_format shadows a member of this az_sw_dude 1162 warning: ticks shadows a member of this az_sw_dude 1289 posix_time::time_facet forgets to pass a_ref argument to base class az_sw_dude 1299 change in typedef stringstream_type in format_date_parser.hpp causing compilation error az_sw_dude 1306 invalid docbook in date_period.xml az_sw_dude 1384 Linking problem with date_time library on Visual C++ 2008 Express az_sw_dude 1386 date_time documentation Jamfile breaks building of boost docs az_sw_dude 1524 format_date_parser.hpp(221) : cannot convert parameter 1 az_sw_dude 1574 operator<< for boost::posix_time::ptime ignores ostream flags az_sw_dude 287 wrong usage of ios_base::narrow az_sw_dude 316 date_time type conversion warning az_sw_dude 604 from_ftime incorrectly processes FILETIME filled with zeros az_sw_dude 642 operator<< for gregorian::date_duration not found az_sw_dude 889 Insane Dependencies az_sw_dude 890 date_time library supports only the current dst rule bemandawes 1378 filesystem path invalid name for hidden files (LINUX) bemandawes 1389 filesystem::ostream << boost::format generates operator ambigious error (in MSVC++) bemandawes 1458 Darwin Tiger throws std::runtime_error: locale::facet::_S_create_c_locale name not valid bemandawes 1578 bug in readdir_r_simulator() in a multi-threaded environment bemandawes 1583 Serious flaw in boost::filesystem filename handling (opensuse) bemandawes 1589 [filesystem] 'mbstate_t' : is not a member of 'std' bemandawes 752 directory_iterator doesn't work with catch burbelgruff 1503 typeof bug (big integral constant) danieljames 1554 When BOOST_HASH_NO_EXTENSIONS is defined hash doesn't support new string types. danieljames 1555 When BOOST_HASH_NO_EXTENSIONS is defined hash doesn't support boost::system::error_code danieljames 1596 [unordered] non-standard prototype of malloc_allocator<>::allocate (size_t_ const_pointer) danielw 1044 Argument pack inaccessable in a functions return type danielw 1054 Parameter takes an "infinite" amount of time to compile with the Intel compiler. danielw 1097 keyword.hpp generates many warnings C4180: qualifier applied to function type has no meaning; ignored dave 1010 linking boost.python on freebsd dave 1019 iterator_facade::pointer should be the return type of operator-> (DR 445) dave 1085 Python rules for compiling in Mac OS X dave 1179 [boost.python] can not export a union in VC2005sp1 dave 1181 [boost.python] can modify enum value dave 1387 Review / update docs to reflect changes dave 1460 Python classes with multiple bases are convertible only to the first class in the lists dave 1482 boost::python::throw_error_already_set should be marked noreturn dave 1516 [python] Failing VC9 regression tests dave 1599 [python] '_set_se_translator': identifier not found dave 865 Use of C++0x keyword as identifier dave 910 gcc strict-aliasing problems with python dgregor 1003 [iostreams] copy-paste error in typedefs for wchar multichar_filters dgregor 1139 [iostreams] Regex filter segfaults when zero matches found dgregor 1140 boost::iostreams linked_streambuf bug dgregor 1149 Minor doc error in basic_null_device dgregor 1164 Floyd Warshall broken with unsigned edge weights dgregor 1185 iostreams::direct_streambuf<T_Tr>::is_open always returns false if output iterator is not null dgregor 1192 [boostbook] problem when two files have the same name dgregor 1199 configure doesn't work with path containing whitespaces (MacOS X) dgregor 1232 mapped_file_source::is_open() is broken under windows dgregor 1310 [result_of] const-qualified function pointer doesn't work dgregor 1326 Unable to check graph isomorphism using LEDA adapter dgregor 1391 dominator_tree_test on Borland/CodeGear outputs overly long line dgregor 1394 Translate libs/graph/build/python/Jamfile to BBv2 dgregor 1395 Write Tests for Python Bindings dgregor 1586 [logic] 'boolalpha' : is not a member of 'std' dgregor 556 Bundled graph properties dgregor 732 Johnson All-Pairs needs better "no path" information dgregor 736 Const correctness violation djowel 1170 Emit Warnings instead of # symbols in the syntax highlighter djowel 1171 Quickbook title output djowel 1172 non-utf djowel 1176 Space after inline code djowel 1206 Escaping from within code? djowel 1273 CR+LF newlines in position_iterator djowel 1276 spirit problem with _GLIBCXX_DEBUG djowel 1277 Closing section like [pre with } causes Quickbok to crash djowel 1280 sections in imported source files get put inside <para> elements in docbook output djowel 1281 Quickbook produces invalid BoostBook/DocBook XML djowel 1324 tuple should have a swap() that operates element-by-element djowel 1396 wrong result_of invocation around transform_view djowel 1436 [quickbook] inline code inside headings djowel 1484 Quickbook produces illegal docbook for some docinfo fields. djowel 1500 [Spirit/Phoenix] C4512 Compiler warnings from VC8 dlwalker 613 boost/crc.hpp uses non-standard conforming syntax doug_gregor 1021 [Graph][reverse_graph] Problem using reverse_graph adapter with an adapted user defined graph doug_gregor 1076 compile error: disconnecting struct with operator()() doesn't work in VS2005 SP1 doug_gregor 375 LEDA graph adaptors do not handle hidden nodes properly doug_gregor 402 random_vertex/random_edge are unnecessarily inefficient doug_gregor 403 Document copy_component doug_gregor 447 reverse_graph and constness of property maps doug_gregor 708 Dijkstra no_init version should not require VertexListGraph doug_gregor 733 Numbered headers don't work with "preferred" syntax doug_gregor 735 Fruchterman-Reingold grid performance can be improved doug_gregor 738 Memory leaks with signal::connect? doug_gregor 829 Implicit graph not implement doug_gregor 852 Problem with Boost and GCC 4.1 ebf 1507 [variant] C4512 warnings from VC8.0 ebf 1548 [variant][docs]typo: formal arg_ operand_ should be v in times_two arglist ebf 965 [doc] boost::variant tutorial - final example uses v1_v2 should be seq1_seq2 ebf 993 Variant should use least common multiple of alignments_ rather than maximum garcia 1581 Boost.MultiArray: Resizing bug if the index is not 0-based grafik 1041 Cygwin requires PATH setting. grafik 1062 Cygwin install stage fails with combination of patches grafik 1322 trac rejects patch attachment as spam grafik 1417 Regresson tests hang in Darwin (Tiger) grafik 1430 Regression fails under Cygwin grafik 1433 Trac's spam detection rejects too many valid messages grafik 1512 Broken link to vacpp in bjam docs. grafik 1513 Broken link to bcpp in bjam docs. grafik 1571 boost bugtracker displays a patch incorrectly grafik 1576 cannot read non-ASCII output messages grafik 1577 Some commands don't work because hStdInput == 0 grafik 616 Boost Jam_ and non english directorys grafik 959 linking fails when Boost is compiled with STLport 5.1.* on Linux (names mismatch) grafik 986 Problem building Python modules on boost 1.34.0 hkaiser 1079 boost-1.34.0 fails to compile. concept checks not satisfied. hljin 1522 bit_range friend decl in bit_aligned_pixel_reference.hpp needs to be fully qualified for gcc 4.3 mainline igaztanaga 1080 boost::interprocess win32 global file mapping issue igaztanaga 1210 interprocess::barrier hangs during second use under linux (boost 1.33.1) igaztanaga 1390 Interpocess: managed shared memory failing completely under OS X igaztanaga 1593 [intrprocess] 'streamoff' : is not a member of 'std' jmaurer 351 Diff in state of mersenne_twister gen between GCC3.41 & CW9 jmaurer 599 uniform_01 copies engine instead of using a reference jmaurer 819 uniform_int<> with type's maximum availaible range error johnmaddock 1081 Empty string rejected as perl-style regex johnmaddock 1314 Using SSE-intrinsics in VC8 causes static assert in type_with_alignment.hpp johnmaddock 1411 Fix BOOST_PARTIAL_SPECIALIZATION_EXPLICT_ARGS johnmaddock 1446 POSIX API doesn't use C locale johnmaddock 1451 error: use of C99 long long integer constant jsiek 1531 segfault in dynamic_bitset::reference assign operator jsiek 1540 Poisson distribution very slow for large mean (and may also overflow). jsiek 416 Spelling of Edmonds-Karp-Algorithm jsiek 575 Calling subgraph::global_to_local on a root graph jsiek 636 strange compiling problem for transitive_closure jsiek 815 remove_edge core dumps on self-circle jsiek 875 No iterator based constructor for adjacency_matrix jsiek 900 graphml reader namespace handling is broken kaalus 1184 property_tree assignment (operator) bug marshall 1252 [pool] severe overhead with unaligned sizes. matias 1406 Understanding the Tables outdated matias 1539 Missing semi-colon in random library quitck start example nasonov 1220 lexical_cast requires RTTI nasonov 754 boost::any - typeid comparison across shared boundaries nesotto 1284 [range] sub_range assignment issue nesotto 1464 boost_range_array unused in several array_size() functions nesotto 1565 iterator_range disables msvc warning 4996 pavol_droba 1152 rle_example fails pavol_droba 1385 begin must be boost-qualified pdimov 1106 shared_ptr<T> should not convert to shared_ptr<U> when T* doesn't convert to U* pdimov 1444 scoped_ptr::operator== should be equivalent to a.get()==b.get()_ but is currently !!a==!!b pdimov 1590 shared_ptr documentation inconsistency pdimov 779 gcc-4.2 atomicity.h location ramey 1569 serialization doen't build on mingw ramey 878 error C2039: 'mbstate_t' : is not a member of 'std' rogeeff 1383 signal.h features not found on Mac OS samuel_krempp 859 boost::format ignores a user defined locale shammah 386 boost::pool_allocator breaks with vector of vectors speedsnail 1138 Problems with TSS and static thread library t_schwinger 1100 Building boost.function_types fails cvs rev-1.1_ no chdir command in bash turkanis 1523 [iostreams] VC8/VC9 compiler warnings turkanis 1545 [boost/rational.hpp] 'noskipws' is not a member of 'std' turkanis 1575 boost_bzip2 contains the symbol "main" turkanis 1579 gzip compressor should model DualUseFilter turkanis 1580 Add static assert to prohibit instantiating a chain with mode dual_use urzuga 574 [boost::lambda] Compile error with libstdc++ debug mode urzuga 781 Lambda: (_1 + "y")(string("x")) Doesn't Compile vladimir_prus 1165 more quoting problems vladimir_prus 1274 Useless error message vladimir_prus 1321 invalid docbook in tool documentation vladimir_prus 1527 [program_options] Second (and subsequent) lines in tabbed text not aligned correctly vladimir_prus 1530 Program options documentation - Overview - Syntactic Information example typo vladimir_prus 1537 no value given in 'mysql_password =' vladimir_prus 1584 cryptic bbv2 error building quickbook vladimir_prus 1587 [program_options] crashes if value part missing in external configuration file vladimir_prus 1588 [program_options] crashes if value part missing in external configuration file vladimir_prus 469 multitoken broken vladimir_prus 689 [program_options] Endless loop with long default arguments witt 1046 Boost.Python quickstart instructions mention nonexistent target witt 583 Fixes for build on IBM pSeries for AIX and Linux witt 834 Homepage regression links witt 957 The "Getting Started" page does not mention the stdlib option witt 973 zip_iterator has value_type == reference -- -- Marshall Marshall Clow Qualcomm, Inc. <mailto:mclow@qualcomm.com> The famous British scientist, Lord Kelvin, said: "When you measure what you are speaking about and express it in numbers, you know something about it, but when you cannot (or do not) measure it, when you cannot (or do not) express it in numbers, then your knowledge is of a meagre and unsatisfactory kind."

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1.35 release date
by Eames, Andrew 23 Jan '08

23 Jan '08

Any update on when we can expect 1.35 to be released? This is probably a FAQ but I can't find the info anywhere Thanks Andrew

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[circular_buffer] some comments and suggestions
by Thorsten Ottosen 23 Jan '08

23 Jan '08

Hi Jan, #1 I was browsing through the docs in trunk. First I noticed that the default constructor has the follwoing postcondition: capacity() == max_size() && size() == 0 I find that somewhat unfortunate that it allocates a huge amount of memory. It seems to me that it is too easy to do that by coincidence. The usual rule for std containers is to never allocate by default and anticipate a call to reserve() or the first element. It also seems to me that this will create problems when the container is used in containers that might use default construction. #2 I think it would be useful to add a predicate called is_linearized(), so one can check if this property holds. Also, if this do hold, I should be able the get fast iterators to this linear segment, perhaps by calling .base() on the iterators which then simply return a pointer (I know I can get the pointers by array_one(), but I would more often need the iterators). #3 I think it would be useful to add rotate() as a member function. AFAICT, it can in many times (if not all) be much faster than std::rotate() because it can simply move a few elements and then simply adjust the iterators. -Thorsten

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Boost Lib Design Question - TR1
by Jared McIntyre 23 Jan '08

23 Jan '08

I was hoping to get some of your thoughts on best practices for TR1 usage in boost libraries (maybe there is already a recommendation that I haven't seen yet). I'd like for some of the libraries I'm working on in the sandbox to use the TR1 namespace wherever possible, since this seems more future proof than using the boost namespace. I understand how to use the TR1 namespace in boost so that it uses the TR1 implementation of the compiler provider if it exists, or the version of boost if it doesn't. For libraries in boost, I don't see a really "clean" way to do this as it seems it would require the user to add an additional include path beyond just the standard boost path (just like you do if you use it outside) to use my library. Is anyone trying to code their boost library to the TR1 namespace? How are you doing it? Thanks, Jared

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Re: [boost] Critical bugfix for Boost.Function on 12/19
by Chad Walters 23 Jan '08

23 Jan '08

Phil Endicott wrote: >>Chad Walters wrote: >> 2. I can't seem to find any mention of this on the user, devel, or announce >> mailing lists. > >See: > >http://thread.gmane.org/gmane.comp.lib.boost.devel/167877 >http://thread.gmane.org/gmane.comp.lib.boost.devel/169431 > >> Is there some place besides the home page where things like >> this get publicized? I guess I would have expected this to come through on >> at least of one of those three lists. Thanks for the pointers. I do think it would be a good idea if things that were identified as critical fixes were made more broadly visible. I venture to guess that a lot of people on the mailing list look at the Boost home page for updates fairly infrequently. Chad

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[math - quaternions, octonions] Template parameter
by Adam Badura 22 Jan '08

22 Jan '08

The template parameter may be something else then "float", "double" or "long double"? If no then I think the documentation should state it clear and it seems to me that it does not at all. (From what I recall specification of std::complex for example explicitely prohibits other specializations then those three types.) Why all functions take parameter T as "T const&" even in specialization and not boost::call_traits<T>::param_type which would be most probably (so I susppect) non reference type? Adam Badura

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