- Boost - lists.boost.org

[Boost.Test] return value of macros
by Thorsten Ottosen 26 Jan '08

26 Jan '08

Hi Gennadiy, I often want to output message or do additional test of another test fails. It would be cool if I could do it like this: if( !BOOST_CHECK_CLOSE( aStarEcr, close, 0.0001 ) ) { BOOST_MESSAGE( "\nA* sequence: " << aStarSeq ); BOOST_MESSAGE( "\nClose sequence: " << closeSeq ); } But, AFAICT, the macros are implemented this way: #define BOOST_CHECK_WITH_ARGS_IMPL( P, check_descr, TL, CT, ARGS ) \ do { \ BOOST_TEST_PASSPOINT(); \ BOOST_TEST_TOOL_IMPL( check_frwd, P, check_descr, TL, CT ) \ BOOST_PP_SEQ_FOR_EACH( BOOST_TEST_PASS_ARG_INFO, '_', ARGS ) ); \ } while( ::boost::test_tools::dummy_cond ) \ /**/ Do you think it would be possible have a bool returning function instead of the while loop? best regards -Thorsten

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Runtime error when try to stop boost thread
by 申和平 26 Jan '08

26 Jan '08

Hi, all I got a runtime erro when try to stop a boost thread. I created a class(listed below) to wrap boost thread, and used it like this: ThreadWrapper tw(1);//delay 1 seconds tw.start(); … tw.stop(); When I called the function “stop”, a runtime error jump out said access conflict when running the line(in once.cpp,Line 163): HANDLE mutex = CreateMutexA(NULL, FALSE, strm.str().c_str()); I’ve tried the class in two MFC project. One has error, and the other one ran correctly. How strange! Is it a bug of boost? Please help me. //========================================================================== == #include <boost/thread.hpp> #include <boost/bind.hpp> class ThreadWrapper { public: ThreadWrapper(unsigned delySec=0) { m_delySec = delySec; m_pause = false; m_stop = false; } public: virtual ~ThreadWrapper(void) { } protected: boost::mutex m_mutex; boost::condition m_cond; bool m_stop; bool m_pause; unsigned m_delySec; public: virtual void start() { boost::thread mtth(boost::bind(&ThreadWrapper::run, this)); } virtual void pause() { boost::mutex::scoped_lock lock(m_mutex); m_pause = true; m_cond.notify_one(); } virtual void resume() { boost::mutex::scoped_lock lock(m_mutex); m_pause = false; m_cond.notify_one(); } virtual void stop() { boost::mutex::scoped_lock lock(m_mutex); m_stop=true; m_cond.notify_one(); //I tried join, but still got the same error } virtual void run() { while(m_stop == false) { if (m_pause == true) { boost::mutex::scoped_lock lock(m_mutex); while(m_pause == true) { m_cond.wait(lock); } } boost::xtime xt; boost::xtime_get(&xt, boost::TIME_UTC); xt.sec += m_delySec; boost::thread::sleep(xt); } } } //========================================================================== ==

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[mpl][documentation]bug: refmanual/protect.html typedef without identifier
by Larry Evans 25 Jan '08

25 Jan '08

http://www.boost.org/libs/mpl/doc/refmanual/protect.html contains: typedef bind<_1, protect< bind<f,_1,_2> > > which contains no 'identifier ;'. OOPS, I missed the FIXME at top of example. However, putting that FIXME in read would help other's see it.

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Trac open bugs - by assignee
by Marshall Clow 25 Jan '08

25 Jan '08

[ 206 open bugs today, 208 yesterday ] [ That "None" guy sure has a bunch -- anyone want some of his bugs? ] 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 17 djowel 15 None 14 grafik 12 doug_gregor 12 dgregor 12 dave 12 agurtovoy 11 vladimir_prus 8 jsiek 7 bemandawes 7 anthonyw 5 witt 5 johnmaddock 4 turkanis 4 pdimov 4 ebf 3 nesotto 3 jmaurer 3 igaztanaga 3 danielw 3 danieljames 2 urzuga 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 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 None 1602 function_types Jamfile depends on the source tree being in a specific place. None 1603 Compile Error: cpp_expression_value.hpp - is_int_ is_bool_ is_uint undeclared 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 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 1164 Floyd Warshall broken with unsigned edge weights dgregor 1192 [boostbook] problem when two files have the same name dgregor 1199 configure doesn't work with path containing whitespaces (MacOS X) 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 djowel 1600 duplicate include guard djowel 1601 distane of boost::tuple 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 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 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 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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[thread] shared_mutex replaces read_write_mutex?
by Kowalke Oliver (QD IT PA AS) 25 Jan '08

25 Jan '08

Hi, will shared_mutex replace read_write_mutex? Where can I reasd more about the usage of shared_mutex (http://svn.boost.org/svn/boost/trunk/libs/thread/doc/ doesn't contain an explanation)? best regards, Oliver

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Runtime error when try to stop boost thread
by 申和平 25 Jan '08

25 Jan '08

Hi, all I got a runtime erro when try to stop a boost thread. I created a class(listed below) to wrap boost thread, and used it like this: ThreadWrapper tw(1);//delay 1 seconds tw.start(); … tw.stop(); When I called the function “stop”, a runtime error jump out said access conflict when running the line(in once.cpp,Line 163): HANDLE mutex = CreateMutexA(NULL, FALSE, strm.str().c_str()); I’ve tried the class in two MFC project. One has error, and the other one ran correctly. How strange! Is it a bug of boost? Please help me. //========================================================================== == #include <boost/thread.hpp> #include <boost/bind.hpp> class ThreadWrapper { public: ThreadWrapper(unsigned delySec=0) { delySec = delySec; m_pause = false; m_stop = false; } public: virtual ~ThreadWrapper(void) { } protected: boost::mutex m_mutex; boost::condition m_cond; bool m_stop; bool m_pause; unsigned m_delySec; public: virtual void start() { boost::thread mtth(boost::bind(&ThreadWrapper::run, this)); } virtual void pause() { boost::mutex::scoped_lock lock(m_mutex); m_pause = true; m_cond.notify_one(); } virtual void resume() { boost::mutex::scoped_lock lock(m_mutex); m_pause = false; m_cond.notify_one(); } virtual void stop() { boost::mutex::scoped_lock lock(m_mutex); m_stop=true; m_cond.notify_one(); } virtual void run() { while(m_stop == false) { if (m_pause == true) { boost::mutex::scoped_lock lock(m_mutex); while(m_pause == true) { m_cond.wait(lock); } } boost::xtime xt; boost::xtime_get(&xt, boost::TIME_UTC); xt.sec += m_delySec; boost::thread::sleep(xt); } } } //========================================================================== ==

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Is there any interest in a template geometry library?
by Barend Gehrels 25 Jan '08

25 Jan '08

Hi, Is there any interest in a template geometry library? The library we are developing is basic 2D geometry library. In this library, data structures are small and simple (but polygons can still have holes). Nevertheless, the library provides a lot of useful algorithms such as point-in-polygon, line intersections and polygon clipping. We at Geodan are developing our library since 1995, and recently restructured, simplified and enhanced the geometry core. Now that it is clean and well designed, and still with years of experience, we aim to publish it in Boost under the Boost Software License. To give some impressions, points are like this: template <typename T> class point { (...) inline const T& x() const (...) inline const T& y() const (...) }; and lines are completely empty, like this: template <typename P> class linestring : public std::vector<P> { }; (Besides that you can also specify another container). Data and algorithms are separated, so there are algorithms like: template <typename P, typename POL> bool point_in_polygon(const P& p, const POL& pol); and like this: template <typename S1, typename S2, typename MP> intersection_result intersection_segment(const S1& segment1, const S2& segment2, MP& multipoint); but also generic wrappers like a "within" algorithm which is defined for all relevant geometry types template <typename P1, typename P2> inline bool within(const P& p, const polygon<P2>& poly) Because the library is completely templatized, you can use your own geometry types, and/or container types (provided that they follow the basic interface). The library follows std:: and boost:: standards and conventions, as well as the OGC (The Consortium on Standards in Geographical Information Systems) conventions. I know there have been discussions before on geometry libraries and on CGAL, e.g. http://lists.boost.org/Archives/boost/2007/03/117582.php. We are using boost in our library since about 2000. If there is interest I will complete the documentation and examples according to Boost standards, and prepare a submission. Barend Gehrels ------------------------------------- Barend Gehrels ------------------------------------- Geodan Holding b.v. President Kennedylaan 1 1079 MB Amsterdam, the Netherlands ------------------------------------- E-mail: barend.gehrels(a)geodan.nl Website: www.geodan.nl -------------------------------------

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[system] [1.35] psox_error enumeration
by Kowalke Oliver (QD IT PA AS) 25 Jan '08

25 Jan '08

Hi, boost::system contains an posxi_error enumeration with element success = 0. Woldn't it make sense to add also an element eof (related to network libraries: end of streamed socket == socket was closed by peer)? best regards, Oliver

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BoostCon 2008 Now Open For Registration
by David Abrahams 25 Jan '08

25 Jan '08

Hi All, The 2nd annual Boost Conference has been scheduled for May 4-9 2008. Please see http://www.boostcon.com/registration for registration information. If you want to stay at the Aspen Meadows (highly recommended as it is within walking distance of the conference venue and was the site of great after-hours discussions in '07), it's especially important this year that you book your rooms early. Since, unlike last year, Aspen's airport will be open this May, demand for rooms has been heavy. In fact, the following week, which we tried to get, was snapped up by another group before we even had a chance to catch our breath, just weeks after BoostCon'07 ended. We'll be working hard on getting the program together for 2008 over the coming weeks. We hope to include many more Boost authors and contributors, and build in several more intensive library-specific sessions, to make 2008 better than ever. Please send any questions to the BoostCon planning committee at: organizers(a)boostcon.com. Those of you who didn't make it to BoostCon'07 may want to have a look at the photo gallery at http://boostcon.com/community/photos, peruse the 2007 program at http://boostcon.com/program, and check out the two trip reports mentioned here: http://boostcon.com/news/2007/Jul/16/yet-another-trip-report. See you in Aspen! -- The BoostCon Planning Committee

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[review] Review of Flyweight library
by David Sankel 25 Jan '08

25 Jan '08

* What is your evaluation of the design? It looks very well designed and I especially find the flexibility of the policy mechanism to be very well done. * What is your evaluation of the implementation? I haven't looked at much code, so I have no opinion here. * What is your evaluation of the documentation? I found the documentation to be comprehensive and with good flow. * What is your evaluation of the potential usefulness of the library? In my programming career I haven't encountered a use case for this library. That isn't to say it wouldn't be useful in other domains. * Did you try to use the library? With what compiler? Did you have any problems? Nope, didn't try it. * How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? I did an in depth study of the documentation only. * Are you knowledgeable about the problem domain? I wasn't before I read the documentation, but I feel knowledgeable now after going through it. * 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. Yes, I do. My preference on the equality mechanism would be to make it a configuration option via a template parameter during construction with the default being (fw1.get()==fw1.get()) instead of (&(fw1.get())==&(fw1.get()). The benefit would be that those who would understand when this would fail could enable the quicker behavior while those who don't understand could remain in blissful ignorance. I prefer the original configuration mechanism. I think that it, combined with the very good documentation, is good enough and further extensions would complicate things further. David -- David Sankel Sankel Software www.sankelsoftware.com 585 617 4748 (Office) 585 309 2016 (Mobile)

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