- Boost - lists.boost.org

Bug list status
by Marshall Clow 27 Oct '05

27 Oct '05

Three weeks ago: 144 open bugs Two weeks ago: 117 open bugs Last week: 96 open bugs Today: 94 open bugs Thanks to everyone who dealt with the bugs! [ But we're slowing down - I blame the 1.33.1 release process ;-) ] Here are the currently opened bugs, sorted by assignee. If you think that a bug has been assigned incorrectly, please let me know. P.S. I need someone to fix the bugs in the tokenizer library!! Assignee: agurtovoy <http://sourceforge.net/users/agurtovoy/> Summary: mpl::select2nd on vc6 Bug #: 812263 <http://sourceforge.net/tracker/index.php?func=detail&aid=812263&group_id=75…> Assignee: az_sw_dude <http://sourceforge.net/users/az_sw_dude/> Summary: wrong usage of ios_base::narrow Bug #: 989487 <http://sourceforge.net/tracker/index.php?func=detail&aid=989487&group_id=75…> Assignee: az_sw_dude <http://sourceforge.net/users/az_sw_dude/> Summary: date_time type conversion warning Bug #: 1069225 <http://sourceforge.net/tracker/index.php?func=detail&aid=1069225&group_id=7…> Assignee: az_sw_dude <http://sourceforge.net/users/az_sw_dude/> Summary: local_adjustor::utc_to_local throws 'Time label invalid' Bug #: 1220011 <http://sourceforge.net/tracker/index.php?func=detail&aid=1220011&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: filesytem::directory_iterator portability Bug #: 735403 <http://sourceforge.net/tracker/index.php?func=detail&aid=735403&group_id=75…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: boost::filesystem fails in posix with files containing ':' Bug #: 776146 <http://sourceforge.net/tracker/index.php?func=detail&aid=776146&group_id=75…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: clock is not portable Bug #: 788762 <http://sourceforge.net/tracker/index.php?func=detail&aid=788762&group_id=75…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: Boost::Filesystem fails when last character in path is ':' Bug #: 875970 <http://sourceforge.net/tracker/index.php?func=detail&aid=875970&group_id=75…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: filesystem::directory_iterator returns incorrect listing Bug #: 937606 <http://sourceforge.net/tracker/index.php?func=detail&aid=937606&group_id=75…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: xtime_cmp: use comparison not subtraction Bug #: 993272 <http://sourceforge.net/tracker/index.php?func=detail&aid=993272&group_id=75…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: boost::filesystem::exists is broken on cygwin Bug #: 1010681 <http://sourceforge.net/tracker/index.php?func=detail&aid=1010681&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: boost::filesystem is systematically broken Bug #: 1012135 <http://sourceforge.net/tracker/index.php?func=detail&aid=1012135&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: boost::filesystem::native() should reject '/' on non-Win32 Bug #: 1151823 <http://sourceforge.net/tracker/index.php?func=detail&aid=1151823&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: boost::filesystem::exists has bugs with UNC paths Bug #: 1164057 <http://sourceforge.net/tracker/index.php?func=detail&aid=1164057&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: boost::filesystem::equivalent does not work on w98 Bug #: 1235262 <http://sourceforge.net/tracker/index.php?func=detail&aid=1235262&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: path and directory_iterator doesn't handle windows root path Bug #: 1259176 <http://sourceforge.net/tracker/index.php?func=detail&aid=1259176&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: no conversion from type to const_type Bug #: 547743 <http://sourceforge.net/tracker/index.php?func=detail&aid=547743&group_id=75…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: EdgeListS = setS for adjacency_list does not work Bug #: 1163077 <http://sourceforge.net/tracker/index.php?func=detail&aid=1163077&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: adjacency_matrix should model BidirectionalGraph Bug #: 1168411 <http://sourceforge.net/tracker/index.php?func=detail&aid=1168411&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: LEDA graph adaptors for undirected graphs Bug #: 1168420 <http://sourceforge.net/tracker/index.php?func=detail&aid=1168420&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: LEDA adaptors for node_array, edge_array Bug #: 1168424 <http://sourceforge.net/tracker/index.php?func=detail&aid=1168424&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: LEDA graph adaptors do not handle hidden nodes properly Bug #: 1168431 <http://sourceforge.net/tracker/index.php?func=detail&aid=1168431&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: Generate patches for Graph bugs in 1.32.0 Bug #: 1169920 <http://sourceforge.net/tracker/index.php?func=detail&aid=1169920&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: Investigate other kinds of heaps for dijkstra_shortest_paths Bug #: 1170106 <http://sourceforge.net/tracker/index.php?func=detail&aid=1170106&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: function.hpp breaks assign.hpp Bug #: 1181272 <http://sourceforge.net/tracker/index.php?func=detail&aid=1181272&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: vertex bundle properties do not work with VC++.NET 2003 Bug #: 1190394 <http://sourceforge.net/tracker/index.php?func=detail&aid=1190394&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: BGL graph types do not support allocators Bug #: 1193883 <http://sourceforge.net/tracker/index.php?func=detail&aid=1193883&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: random_vertex/random_edge are unnecessarily inefficient Bug #: 1204684 <http://sourceforge.net/tracker/index.php?func=detail&aid=1204684&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: Document copy_component Bug #: 1204688 <http://sourceforge.net/tracker/index.php?func=detail&aid=1204688&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: reverse_graph and constness of property maps Bug #: 1246336 <http://sourceforge.net/tracker/index.php?func=detail&aid=1246336&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: html docs frequently missing key words Bug #: 1294420 <http://sourceforge.net/tracker/index.php?func=detail&aid=1294420&group_id=7…> Assignee: djowel <http://sourceforge.net/users/djowel/> Summary: Miss ' = ParserT()' Bug #: 907299 <http://sourceforge.net/tracker/index.php?func=detail&aid=907299&group_id=75…> Assignee: djowel <http://sourceforge.net/users/djowel/> Summary: spirit insert_key_actor.hpp Bug #: 1059936 <http://sourceforge.net/tracker/index.php?func=detail&aid=1059936&group_id=7…> Assignee: djowel <http://sourceforge.net/users/djowel/> Summary: Another config correction for Sun C++ Bug #: 1220782 <http://sourceforge.net/tracker/index.php?func=detail&aid=1220782&group_id=7…> Assignee: dlwalker <http://sourceforge.net/users/dlwalker/> Summary: template problems with common_factor.hpp Bug #: 491637 <http://sourceforge.net/tracker/index.php?func=detail&aid=491637&group_id=75…> Assignee: ebf <http://sourceforge.net/users/ebf/> Summary: boost::blank - missing operators Bug #: 1191356 <http://sourceforge.net/tracker/index.php?func=detail&aid=1191356&group_id=7…> Assignee: glassfordm <http://sourceforge.net/users/glassfordm/> Summary: timeconv.inl to_duration() nsec error Bug #: 548104 <http://sourceforge.net/tracker/index.php?func=detail&aid=548104&group_id=75…> Assignee: glassfordm <http://sourceforge.net/users/glassfordm/> Summary: Solaris - once.cpp compile error Bug #: 549162 <http://sourceforge.net/tracker/index.php?func=detail&aid=549162&group_id=75…> Assignee: glassfordm <http://sourceforge.net/users/glassfordm/> Summary: pthread_delay_np() parm incorrect Bug #: 551157 <http://sourceforge.net/tracker/index.php?func=detail&aid=551157&group_id=75…> Assignee: glassfordm <http://sourceforge.net/users/glassfordm/> Summary: Bosot.Thread.condition(win32).notify_all Bug #: 551308 <http://sourceforge.net/tracker/index.php?func=detail&aid=551308&group_id=75…> Assignee: glassfordm <http://sourceforge.net/users/glassfordm/> Summary: AIX 4.3 SIGSEGV at thread termination Bug #: 551577 <http://sourceforge.net/tracker/index.php?func=detail&aid=551577&group_id=75…> Assignee: glassfordm <http://sourceforge.net/users/glassfordm/> Summary: boost::threads uses msvc only function? Bug #: 568951 <http://sourceforge.net/tracker/index.php?func=detail&aid=568951&group_id=75…> Assignee: glassfordm <http://sourceforge.net/users/glassfordm/> Summary: threads unnecessary #include Bug #: 571615 <http://sourceforge.net/tracker/index.php?func=detail&aid=571615&group_id=75…> Assignee: glassfordm <http://sourceforge.net/users/glassfordm/> Summary: BCB6 throw EExternelException Bug #: 596149 <http://sourceforge.net/tracker/index.php?func=detail&aid=596149&group_id=75…> Assignee: glassfordm <http://sourceforge.net/users/glassfordm/> Summary: thread_cleanup problems Bug #: 649291 <http://sourceforge.net/tracker/index.php?func=detail&aid=649291&group_id=75…> Assignee: glassfordm <http://sourceforge.net/users/glassfordm/> Summary: Mac implementation of threads is CPU hog Bug #: 885045 <http://sourceforge.net/tracker/index.php?func=detail&aid=885045&group_id=75…> Assignee: glassfordm <http://sourceforge.net/users/glassfordm/> Summary: condition variables and recursive_mutex Bug #: 1072605 <http://sourceforge.net/tracker/index.php?func=detail&aid=1072605&group_id=7…> Assignee: glassfordm <http://sourceforge.net/users/glassfordm/> Summary: compiler error on Mac implementation of threads Bug #: 1201779 <http://sourceforge.net/tracker/index.php?func=detail&aid=1201779&group_id=7…> Assignee: glassfordm <http://sourceforge.net/users/glassfordm/> Summary: timeconv.inl line 116 copy/paste error Bug #: 1239052 <http://sourceforge.net/tracker/index.php?func=detail&aid=1239052&group_id=7…> Assignee: glassfordm <http://sourceforge.net/users/glassfordm/> Summary: Exception safety in class 'thread' Bug #: 1305885 <http://sourceforge.net/tracker/index.php?func=detail&aid=1305885&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: 'failed fileclone' when building with -j on 1.32.0 Bug #: 1102389 <http://sourceforge.net/tracker/index.php?func=detail&aid=1102389&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: boost jam problem with parallel builds Bug #: 1234224 <http://sourceforge.net/tracker/index.php?func=detail&aid=1234224&group_id=7…> Assignee: jbandela <http://sourceforge.net/users/jbandela/> Summary: tokenizer fails with wchar_t Bug #: 446155 <http://sourceforge.net/tracker/index.php?func=detail&aid=446155&group_id=75…> Assignee: jbandela <http://sourceforge.net/users/jbandela/> Summary: tokenizer not works with Dinkumware 308 Bug #: 458236 <http://sourceforge.net/tracker/index.php?func=detail&aid=458236&group_id=75…> Assignee: jbandela <http://sourceforge.net/users/jbandela/> Summary: boost::tokenizer implicit typename Bug #: 912368 <http://sourceforge.net/tracker/index.php?func=detail&aid=912368&group_id=75…> Assignee: jbandela <http://sourceforge.net/users/jbandela/> Summary: Tokenizer.hpp doesn't work with BOOST_ENABLE_ASSERT_HANDLER Bug #: 972406 <http://sourceforge.net/tracker/index.php?func=detail&aid=972406&group_id=75…> Assignee: jbandela <http://sourceforge.net/users/jbandela/> Summary: Compiler error for tokenizer on Solaris Bug #: 976241 <http://sourceforge.net/tracker/index.php?func=detail&aid=976241&group_id=75…> Assignee: jbandela <http://sourceforge.net/users/jbandela/> Summary: tokenizer and signed char Bug #: 1003889 <http://sourceforge.net/tracker/index.php?func=detail&aid=1003889&group_id=7…> Assignee: jbandela <http://sourceforge.net/users/jbandela/> Summary: token_iterator::at_end() result is inversed Bug #: 1338326 <http://sourceforge.net/tracker/index.php?func=detail&aid=1338326&group_id=7…> Assignee: jmaurer <http://sourceforge.net/users/jmaurer/> Summary: Diff in state of mersenne_twister gen between GCC3.41 & CW9 Bug #: 1115124 <http://sourceforge.net/tracker/index.php?func=detail&aid=1115124&group_id=7…> Assignee: joerg_walter <http://sourceforge.net/users/joerg_walter/> Summary: bug in ublas/storage.hpp Bug #: 1095697 <http://sourceforge.net/tracker/index.php?func=detail&aid=1095697&group_id=7…> Assignee: joerg_walter <http://sourceforge.net/users/joerg_walter/> Summary: dead links in uBLAS page Bug #: 1169273 <http://sourceforge.net/tracker/index.php?func=detail&aid=1169273&group_id=7…> Assignee: joerg_walter <http://sourceforge.net/users/joerg_walter/> Summary: Documentation not available on web site: Bug #: 1228242 <http://sourceforge.net/tracker/index.php?func=detail&aid=1228242&group_id=7…> Assignee: joerg_walter <http://sourceforge.net/users/joerg_walter/> Summary: uBLAS::subslice doesn't work Bug #: 1292635 <http://sourceforge.net/tracker/index.php?func=detail&aid=1292635&group_id=7…> Assignee: johnmaddock <http://sourceforge.net/users/johnmaddock/> Summary: Adding boost::is_complex to type_traits.hpp Bug #: 1315712 <http://sourceforge.net/tracker/index.php?func=detail&aid=1315712&group_id=7…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: invalid result for File Dependency Examp Bug #: 551110 <http://sourceforge.net/tracker/index.php?func=detail&aid=551110&group_id=75…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: Spelling of Edmonds-Karp-Algorithm Bug #: 1226292 <http://sourceforge.net/tracker/index.php?func=detail&aid=1226292&group_id=7…> Assignee: mark_rodgers <http://sourceforge.net/users/mark_rodgers/> Summary: Cannot compile octonion_test.cpp because of bug in sinc.hpp Bug #: 751269 <http://sourceforge.net/tracker/index.php?func=detail&aid=751269&group_id=75…> Assignee: mark_rodgers <http://sourceforge.net/users/mark_rodgers/> Summary: Cannot compile octonion_test.cpp because of bug in sinc.hpp Bug #: 751289 <http://sourceforge.net/tracker/index.php?func=detail&aid=751289&group_id=75…> Assignee: nesotto <http://sourceforge.net/users/nesotto/> Summary: boost.range and 'const char[]'. Bug #: 1272315 <http://sourceforge.net/tracker/index.php?func=detail&aid=1272315&group_id=7…> Assignee: nobody Summary: failure in boost jam unit tests on cygwin Bug #: 940941 <http://sourceforge.net/tracker/index.php?func=detail&aid=940941&group_id=75…> Assignee: nobody Summary: Can't build on cygwin Bug #: 1145183 <http://sourceforge.net/tracker/index.php?func=detail&aid=1145183&group_id=7…> Assignee: ramey <http://sourceforge.net/users/ramey/> Summary: many 'virtual functions vs. non-virtual destructor' warnings Bug #: 1312222 <http://sourceforge.net/tracker/index.php?func=detail&aid=1312222&group_id=7…> Assignee: ramey <http://sourceforge.net/users/ramey/> Summary: Compiler warning with gcc on Linux Bug #: 1337412 <http://sourceforge.net/tracker/index.php?func=detail&aid=1337412&group_id=7…> Assignee: ramey <http://sourceforge.net/users/ramey/> Summary: warning caused by size_t to unsigned int conversion on vc++8 Bug #: 1338178 <http://sourceforge.net/tracker/index.php?func=detail&aid=1338178&group_id=7…> Assignee: rogeeff <http://sourceforge.net/users/rogeeff/> Summary: typo in Boost.Test document Bug #: 629685 <http://sourceforge.net/tracker/index.php?func=detail&aid=629685&group_id=75…> Assignee: rogeeff <http://sourceforge.net/users/rogeeff/> Summary: BOOST_CHECK_CLOSE in Boost Test Library Bug #: 754551 <http://sourceforge.net/tracker/index.php?func=detail&aid=754551&group_id=75…> Assignee: rogeeff <http://sourceforge.net/users/rogeeff/> Summary: BOOST_AUTO_TEST doesn't work across multiple units Bug #: 823589 <http://sourceforge.net/tracker/index.php?func=detail&aid=823589&group_id=75…> Assignee: rogeeff <http://sourceforge.net/users/rogeeff/> Summary: Bug in build via MSVC Solution Bug #: 953876 <http://sourceforge.net/tracker/index.php?func=detail&aid=953876&group_id=75…> Assignee: rogeeff <http://sourceforge.net/users/rogeeff/> Summary: Don't work multilevel hierarchy of test suites in dll. Bug #: 1076691 <http://sourceforge.net/tracker/index.php?func=detail&aid=1076691&group_id=7…> Assignee: samuel_k <http://sourceforge.net/users/samuel_k/> Summary: format: assert when parsing invalid pattern Bug #: 1326132 <http://sourceforge.net/tracker/index.php?func=detail&aid=1326132&group_id=7…> Assignee: shammah <http://sourceforge.net/users/shammah/> Summary: ct_gcd_lcm.hpp compilation error Bug #: 558174 <http://sourceforge.net/tracker/index.php?func=detail&aid=558174&group_id=75…> Assignee: shammah <http://sourceforge.net/users/shammah/> Summary: test_pool_alloc.cpp not compile CW8.1 Bug #: 586779 <http://sourceforge.net/tracker/index.php?func=detail&aid=586779&group_id=75…> Assignee: shammah <http://sourceforge.net/users/shammah/> Summary: pool::purge_memory() does not reset next_size Bug #: 984124 <http://sourceforge.net/tracker/index.php?func=detail&aid=984124&group_id=75…> Assignee: shammah <http://sourceforge.net/users/shammah/> Summary: Borland compiler error with Pool, boost::pool_allocator Bug #: 988124 <http://sourceforge.net/tracker/index.php?func=detail&aid=988124&group_id=75…> Assignee: shammah <http://sourceforge.net/users/shammah/> Summary: perfomance: memory cleanup for pool takes too long Bug #: 995270 <http://sourceforge.net/tracker/index.php?func=detail&aid=995270&group_id=75…> Assignee: shammah <http://sourceforge.net/users/shammah/> Summary: boost::pool_allocator breaks with vector of vectors Bug #: 1179641 <http://sourceforge.net/tracker/index.php?func=detail&aid=1179641&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: Self division wrong in template rational Bug #: 504411 <http://sourceforge.net/tracker/index.php?func=detail&aid=504411&group_id=75…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: Rational sum not optimal for overflows Bug #: 519635 <http://sourceforge.net/tracker/index.php?func=detail&aid=519635&group_id=75…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: rational operator&lt; can overflow Bug #: 798357 <http://sourceforge.net/tracker/index.php?func=detail&aid=798357&group_id=75…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: boost::rational documentation typos(?) Bug #: 1043616 <http://sourceforge.net/tracker/index.php?func=detail&aid=1043616&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: no Boolean conversion for boost::rational Bug #: 1239906 <http://sourceforge.net/tracker/index.php?func=detail&aid=1239906&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: call to split_winmain raises exception for 8-bit locale Bug #: 1206663 <http://sourceforge.net/tracker/index.php?func=detail&aid=1206663&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: multitoken broken in program_options 1.33 Bug #: 1266877 <http://sourceforge.net/tracker/index.php?func=detail&aid=1266877&group_id=7…> -- -- Marshall Marshall Clow Idio Software <mailto:marshall@idio.com> It is by caffeine alone I set my mind in motion. It is by the beans of Java that thoughts acquire speed, the hands acquire shaking, the shaking becomes a warning. It is by caffeine alone I set my mind in motion.

3 2

Interest in dimension/unit-checking library?
by Geoffrey Romer 27 Oct '05

27 Oct '05

Would there be any interest in a library for attaching units (physical or otherwise) to numeric variables, so that the type system could enforce dimension- and unit-consistency in all calculations, and convert semi-automatically between compatible units? To make this a little more concrete, here's a sketch of the kind of code such a library could enable: --- quantity<meters, double> distance(1.0); quantity<newtons, double> force(5.0); quantity<joules, double> work = distance * force; quantity<calories, double> work_cal = unit_cast<calories>(work); work_cal = work; //Compile error or implicit conversion, // possibly depending on compiler flag quantity<watts, double> power = work; //Compile error- incompatible types --- This library would be somewhat similar to the dimensional-analysis code given by Abrahams and Gurtovoy in their book[1], but with two major enhancements: - it would be defined in terms of specific units (as Abrahams and Gurtovoy suggest in an exercise), rather than general dimensions, so it could catch unit-consistency errors as well as dimension-consistency errors, and it could convert between compatible units - it would allow client code to extend the system with arbitrary units in arbitrary dimensions I should note that although I gave the example in terms of physical units for clarity, I intend this library to be useful not just for physical calculation, but for numerical calculation in general. Almost any time software deals with numbers, it's really dealing with *quantities* (numbers that measure something in terms of some unit), and errors can result if variables with different units are inappropriately combined. The purpose of this library would be to allow developers to prevent those errors with strong typing and compile-time checking, as well as to somewhat ease the task of converting between units when necessary. I know there's been a lot of discussion of units for a GUI library, so I'm especially interested in what people involved in that thread think of this idea- I want to make something sufficiently powerful to be useful in a context like that. [1] http://www.boost.org/libs/mpl/doc/tutorial/tutorial-metafunctions.html

18 100

[range][1.33.1] last few regressions.
by John Maddock 27 Oct '05

27 Oct '05

Otto, can the last few regressions for the range lib be fixed (http://engineering.meta-comm.com/boost-regression/CVS-RC_1_33_0/developer/i…) or should these just be marked up as expected? Thanks, John.

7 9

Re: [boost] Is there any interest in a library that provides container
by brangdon＠cix.compulink.co.uk 27 Oct '05

27 Oct '05

In-Reply-To: <1130256273.28161.245978560(a)webmail.messagingengine.com> atompkins(a)fastmail.fm (Andy Tompkins) wrote (abridged): > I have read a few times that people sometimes wish that std::vector (or > other containers) had a virtual destructor. Generally when I've wished for that I've also wished for a few other virtual functions. For example, a hook which gets called whenever an item is added to the vector, and another which is called when items are removed. I think a vector which is designed to be derived from would need more than just a virtual destructor. If you are adding a vtable you might as well get some milage out of it. On the other hand, I rarely need my container to be polymorphic - at least, not with respect to some library base class like std::vector or boost::virtual_vector. Nor do I usually want my container to have the entire interface of vector. For example, I may not want to allow arbitrary insertion at all. So I tend to write a custom wrapper class that has vector as a private member and just exposes what I need. In general inheriting from anything in the std library has the drawback that it injects unknown junk names into your class. Inheriting from a boost class is hardly better. So overall, I'm not in favour. -- Dave Harris, Nottingham, UK.

3 2

[MPL.Math] gcd_impl improved
by Cromwell Enage 27 Oct '05

27 Oct '05

The gcd_impl specialization for integral constants is now based on the binary GCD algorithm. BOOST_STATIC_CONSTANT is now used over typedef at most intermediate steps. You should see much faster compile times, at least for the gcd_lcm test and example programs. Cromwell D. Enage __________________________________ Yahoo! FareChase: Search multiple travel sites in one click. http://farechase.yahoo.com

1 0

[MPL.Math] numeric_downcast or round_up?
by Cromwell Enage 27 Oct '05

27 Oct '05

--- Simon Buchan wrote: > David Abrahams wrote: > > my_rational<x,1> can be an integral constant *at > > compile time*. I'm not sure it's useful, but > > it's not insane. > > If you for some reason still think this, why not > eagerly evaluate > template<typename Num> > rational<Num,1> > to Num, since we are already eagerly normalising? It's possible to do so, but I see three concerns. One, we need to be careful where to do it. Putting this capability directly in the definition of rational makes expressions like rational<int_<4> > rather useless. Employing downcasting on the result of each rational operation leads us to the second concern: performance. Computationally heavy numeric metafunctions (e.g. exponential, sine) are going to pay extra at each step checking for an event that may never occur. And even if downcasting occurs half the time, if there are just as many regular casts back to rational, we end up overpaying twice as much. We could give users the ability to explicitly downcast any numeric constant. This leads us to the final concern: usefulness. For the moment, I don't see any need beyond rounding; the library provides a numeric metafunction called whole_part if you want truncation. If anybody needs either downcasting or rounding, we'd like to hear from you. Cromwell D. Enage __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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[MPL.Math] divergent results for double.cpp
by Cromwell Enage 27 Oct '05

27 Oct '05

Running the example program with MSVC7.1 works as expected. With MinGW I'm forced to use string_c_to_double rather than BOOST_MPL_MATH_DOUBLE. However, it looks like some less-significant bits are getting lost in the translation, as the corresponding log shows. Something may be up with string_c_to_double_impl. Cromwell D. Enage __________________________________ Yahoo! Mail - PC Magazine Editors' Choice 2005 http://mail.yahoo.com

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[program_options] allowing unknown options (from third party libraries)
by Christophe Prud'homme 27 Oct '05

27 Oct '05

Dear Boosters, I could not find in the doc whether it is possible to have unknown options in the command line and tell the parsers to not worry about them. If it is already a feature, then perhaps it should be documented. Otherwise I think it could be a nice addition. the rationale is that there are framework/libraries out there with there own command line options : for example MPI and PETSC Best regards C. -- MIT Affiliate Debian/GNU/Linux developer for scientific computing packages fingerprint = 3703 50DE 7A9F 024E 0F26 0D07 A18F B40B D4BE 1450

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[parameter][1.33.1] last few failures
by John Maddock 27 Oct '05

27 Oct '05

Dave, Daniel, are the last few failures (http://engineering.meta-comm.com/boost-regression/CVS-RC_1_33_0/developer/i…) of the parameter lib fixable or should they be marked up? Thanks, John.

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Re: [boost] Is there any interest in a library that provides cont ainers with virtual destructors?
by Martin Bonner 27 Oct '05

27 Oct '05

----Original Message---- From: Victor A. Wagner Jr. [mailto:vawjr@rudbek.com] Sent: 27 October 2005 03:55 To: boost(a)lists.boost.org; boost(a)lists.boost.org Subject: Re: [boost] Is there any interest in a library that provides containers with virtual destructors? > [deleted] > >>>> >>>> are you suggesting that if it were class people: public >>>> std::vector<person> {.....}; as above the same would be true? >>>> not "in practice", "in theory". >>> >>> Absolutely. See 5.3.5/1 of the standard where this is explicitly >>> called out as undefined behaviour. > > 5.3.5/1 looks like this in my copy of the standard [snip] > > perhaps some other paragraph? this doesn't address anything about > derived objects. D'oh! As others have pointed out, I meant 5.3.5/3. Sorry about that :-( -- Martin Bonner Martin.Bonner(a)Pitechnology.com Pi Technology, Milton Hall, Ely Road, Milton, Cambridge, CB4 6WZ, ENGLAND Tel: +44 (0)1223 441434

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