- Boost - lists.boost.org

Re: [boost] ScopeExit review
by Yanchenko Maxim 23 Aug '07

23 Aug '07

I agree with Steven, This syntax looks same as the new Boost.Parameter syntax, and this is good for the Boost as a whole. Thanks, Maxim 23.08.07, 20:03, Steven Watanabe: > I prefer BOOST_SCOPE_EXIT((cref c)(ref r)(val v)) > for two reasons. > 1) It makes it clear that they are /not/ function > calls > 2) It's slightly easier to implement because you > can use BOOST_PP_SEQ_FOR_EACH. > In Christ, > Steven Watanabe

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[admin] Release schedule proposal
by Beman Dawes 23 Aug '07

23 Aug '07

Proposal -------- * Quarterly release schedule, with the target release date the 15th of the first month of each quarter. * If a release is late, that does not slip the date of the next quarter's release. * If something isn't ready for the current release, it is simply held until the next release. The current release is not delayed. * Being ready means being ready by the cutoff date set by the release manager. That will be relative early in the release cycle. Rationale --------- Regular releases that occur on a predictable schedule have many benefits: * Developers know far in advance when library updates must be ready, and that's both an aid to planning and a motivation to get stuff done. * Users know far in advance when library updates will be ready, and that helps their planning and reassures them of continuing support. * Regularity creates a sense of quality and trust in Boost for both developers and users. Quarterly releases seem about right: * It's often enough that the process will become smooth. * It's often enough that developers won't feel pressure to release immature updates. * It's often enough that users will feel bug fixes and new libraries are being released on a timely basis. * It isn't so often that users will view Boost as unstable, particularly given the predictable schedule. * It isn't so often that developers and release managers will become fatigued. * A quarterly (or similar) schedule has been very successful for both open source and commercial projects. Comments? The rationale depends a lot on my personal experiences, but I don't see that as a bad thing. --Beman

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Trac bugs - by assignee
by Marshall Clow 23 Aug '07

23 Aug '07

[ 361 open tickets today, 354 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> 27 grafik 25 djowel 24 doug_gregor 21 johnmaddock 21 bemandawes 19 az_sw_dude 18 None 15 rogeeff 15 dave 14 ramey 13 jsiek 12 pdimov 12 dgregor 11 vladimir_prus 11 turkanis 11 agurtovoy 8 nesotto 8 anthonyw 7 <Blank> 6 shammah 6 jbandela 5 witt 5 samuel_krempp 4 urzuga 4 mark_rodgers 4 danielw 3 nobody 3 jmaurer 3 fcacciola 3 ebf 3 dlwalker 2 hubert_holin 2 eric_niebler 2 danieljames 2 alnsn 1 t_schwinger 1 speedsnail 1 samuel_k 1 pavol_droba 1 mistevens 1 kevlin 1 igaztanaga 1 hkaiser 1 garcia 1 asutton 1 aaron_windsor None 1199 configure doesn't work with path containing whitespaces (MacOS X) None 1198 patch: boost/function/function_template.hpp fails to compile with gcc -fno-exceptions None 1187 bcp copy not needed files None 1184 property_tree assignment (operator) bug None 1182 Specifying character-set by the guideline and the inspect program None 1166 [boostbook] paths relative to boost.root None 1161 warning: source_type/target_type shadows a member of this None 1144 GIL 2.1 PNG IO fix for endianness problem with bit_depth == 16. None 1116 disable some warnings in msvc build None 1094 Finding the correct library to link (feature request for pkg-config support)h None 1089 missing boost::serialization::make_nvp in pointer container library None 1079 boost-1.34.0 fails to compile. concept checks not satisfied. None 1068 Mersenne twister disables streaming for Visual C++ None 1059 random_on_sphere can be made 10 times faster! None 991 [pool] None 986 Problem building Python modules on boost 1.34.0 None 982 x64 documentation for windows None 960 [random] lognormal_distribution problem <Blank> 1192 [boostbook] problem when two files have the same name <Blank> 1185 iostreams::direct_streambuf<T_Tr>::is_open always returns false if output iterator is not null <Blank> 1112 reference_wrapper<T> should convert to reference_wrapper<U> when T& is convertible to U& <Blank> 1093 Mandatory source files shouldn't require_ or give the impression to require_ the Boost Build system <Blank> 1070 [iostreams]boost\iostreams\copy.hpp line80 copy_impl <Blank> 1033 iostreams::restrict doesn't work on an iostreams::file_source <Blank> 1011 amd64: #error Boost.Numeric.Interval: Please specify rounding control mechanism. aaron_windsor 778 top-level configure is broken agurtovoy 1122 Update regression.py to use SVN repo. agurtovoy 1099 unable to iterate through a "non-explicitly-declared" mpl::set agurtovoy 1051 MPL header ordering triggers bug agurtovoy 1049 Getting mpl/has_xxx.hpp to compile on AIX agurtovoy 1001 gcc 4.1.2 segfaults on mpl/test/apply.cpp agurtovoy 861 Detect nested template members with has_template_xxx agurtovoy 816 duplicat initial members -> erase_key postcond. fail agurtovoy 761 [mpl] evc4 port agurtovoy 640 documentation mistake agurtovoy 637 Adjusts mpl::pair concept to be compatible with STL pairs agurtovoy 588 mpl::remove compile error with gcc 4.1.0 alnsn 839 lexical_cast - local variable shadow patch alnsn 754 boost::any - typeid comparison across shared boundaries anthonyw 1168 [thread] tss crashes randomly anthonyw 1154 tss destruction segfaults in conjunction with dlopen/dlclose anthonyw 1053 Error using boost::mutex and C++/CLI anthonyw 659 provide an abstract "Task" type based on Boost.Threads anthonyw 881 errors when build with Apache stdcxx anthonyw 876 xtime documentation incomplete anthonyw 868 [thread] thread_specific_ptr::element_type ? anthonyw 802 [thread] MSVS: Allow use of thread headers with /Za asutton 693 Add clique detection algorithms DFMax_ Bron-Kerbosch az_sw_dude 1207 Method "from_julian_day_number" (class gregorian_calendar) not documented az_sw_dude 1162 warning: ticks shadows a member of this az_sw_dude 1160 warning: month_format shadows a member of this az_sw_dude 1147 date_time library contains global #define ERROR az_sw_dude 1098 Urgent libboost-date-time1.33.1 : bugs on ia64 ? az_sw_dude 1078 from_iso_string cannot read the output from to_iso_string az_sw_dude 1028 typo in boost header: date_time/time_defs.hpp az_sw_dude 187 locale az_sw_dude 17 Socket wrapper class az_sw_dude 890 date_time library supports only the current dst rule az_sw_dude 889 Insane Dependencies az_sw_dude 827 Unused variable in format date parser az_sw_dude 642 operator<< for gregorian::date_duration not found az_sw_dude 614 new timezone db file for #1471723 - 2007 DST support az_sw_dude 605 support new 2007 DST rules for timezone db az_sw_dude 604 from_ftime incorrectly processes FILETIME filled with zeros az_sw_dude 596 make timezone csv file C/C++ compatible az_sw_dude 316 date_time type conversion warning az_sw_dude 287 wrong usage of ios_base::narrow bemandawes 1092 [Boost.Filesystem] Program can't run under Win 98 bemandawes 1090 scoped_file class that deletes file at end of scope bemandawes 1073 operations.cpp_ dummy_first_name lifetime bemandawes 1061 boost::filesystem::basic_recursive_directory_iterator fails on empty directories. bemandawes 1014 rename throws an exception that is not documented bemandawes 897 exists() throws exeption on existing but locked file on wind bemandawes 842 typo in auto_unit_test.hpp Revision 1.17 bemandawes 824 BOOST_IOSTREAMS_HAS_LSEEK64 on Mac OS X bemandawes 823 Seekable file_descriptor_source /sink? bemandawes 800 [filesystem] chdir() bemandawes 752 directory_iterator doesn't work with catch bemandawes 680 significantly different timer class behaviour on Win and Lin bemandawes 662 [filesystem] portable_posix_name() may fail on premain call bemandawes 621 filesystem::path as a template bemandawes 607 Log level names wrong in documentation bemandawes 600 VC8 can't find windows.h even though environment is correct! bemandawes 590 mkstemp bemandawes 559 linker error mingw 3.4.5 bemandawes 366 handle double '/' in the boost::filesystem bemandawes 294 unicode support in boost::filesystem bemandawes 222 Code analysis_ flaw detection_ debugging danieljames 1095 GCC warnings with -Wsign-promo danieljames 1064 problem on platforms with no errno.h header file danielw 1097 keyword.hpp generates many warnings C4180: qualifier applied to function type has no meaning; ignored danielw 1054 Parameter takes an "infinite" amount of time to compile with the Intel compiler. danielw 1044 Argument pack inaccessable in a functions return type danielw 863 [parameter] fix operator|| for lazy binding dave 1181 [boost.python] can modify enum value dave 1180 [boost.python] def_readwrite need a default docstring dave 1179 [boost.python] can not export a union in VC2005sp1 dave 1096 Tutorial needs updating for BBv2 dave 1085 Python rules for compiling in Mac OS X dave 1066 Patch to make Boost.Python compile on SunCC dave 1020 Boost.Iterator proposal to add is_constant_iterator dave 1019 iterator_facade::pointer should be the return type of operator-> (DR 445) dave 1010 linking boost.python on freebsd dave 918 __doc__ strings dave 916 BPL Support for Python Callable Objects dave 910 gcc strict-aliasing problems with python dave 903 inconsistent usage of function pointer typedefs dave 865 Use of C++0x keyword as identifier dave 857 add shared_ptr< const T> support dgregor 1164 Floyd Warshall broken with unsigned edge weights dgregor 1163 Spurious warning supression needed? dgregor 1149 Minor doc error in basic_null_device dgregor 1140 boost::iostreams linked_streambuf bug dgregor 1139 [iostreams] Regex filter segfaults when zero matches found dgregor 1124 ./configure failed on cygwin dgregor 1101 [MPI] Const-incorrectness in boost::mpi::status dgregor 1003 [iostreams] copy-paste error in typedefs for wchar multichar_filters dgregor 1002 [iostreams] close_impl<closable_tag> does not comply with spec dgregor 930 iostream and zlib dgregor 116 creating my own properties dgregor 556 Bundled graph properties djowel 1206 Escaping from within code? djowel 1205 Quickbook getting started djowel 1204 Non-breaking-space? djowel 1202 Add a [teletype] source mode djowel 1201 Regexify the syntax highlighter djowel 1200 Revamp the header information djowel 1194 Add ID to table to allow linking to tables easily djowel 1193 Nestable tables and lists and exlicit paragraph markup djowel 1190 Markups inside simple markups djowel 1189 Scoped Macros djowel 1176 Space after inline code djowel 1175 What is punctuation? djowel 1174 Simplified template arg handling djowel 1173 Balanced comments djowel 1172 non-utf djowel 1171 Quickbook title output djowel 1170 Emit Warnings instead of # symbols in the syntax highlighter djowel 1159 bibliography support djowel 1158 optional named parameters djowel 1157 On Images djowel 1156 feature request: linkid to the whole document djowel 664 crash in boost::spirit::parse djowel 543 Embedded python won't compile djowel 314 spirit insert_key_actor.hpp djowel 241 Miss " = ParserT()" dlwalker 766 "Bug" in comment (x2) dlwalker 653 [integer] add support for integers longer than long dlwalker 613 boost/crc.hpp uses non-standard conforming syntax doug_gregor 1087 Mismatch between BBv2 and bjam toolsets in configure script. doug_gregor 1076 compile error: disconnecting struct with operator()() doesn't work in VS2005 SP1 doug_gregor 1067 Function needs to use pass-by-reference internally doug_gregor 1021 [Graph][reverse_graph] Problem using reverse_graph adapter with an adapted user defined graph doug_gregor 954 boost::dynamic_properties has no copy-constructor doug_gregor 891 Bunch of compilation error reported while using function.hpp doug_gregor 870 boost::graph::graph_utility.hpp is_connected() bad call doug_gregor 862 [utility] Make result_of handle lambda expressions doug_gregor 852 Problem with Boost and GCC 4.1 doug_gregor 829 Implicit graph not implement doug_gregor 746 max flow with lower bounds (capacities) doug_gregor 738 Memory leaks with signal::connect? doug_gregor 736 Const correctness violation doug_gregor 735 Fruchterman-Reingold grid performance can be improved doug_gregor 733 Numbered headers don't work with "preferred" syntax doug_gregor 732 Johnson All-Pairs needs better "no path" information doug_gregor 708 Dijkstra no_init version should not require VertexListGraph doug_gregor 447 reverse_graph and constness of property maps doug_gregor 403 Document copy_component doug_gregor 402 random_vertex/random_edge are unnecessarily inefficient doug_gregor 395 BGL graph types do not support allocators doug_gregor 375 LEDA graph adaptors do not handle hidden nodes properly doug_gregor 373 LEDA graph adaptors for undirected graphs doug_gregor 372 adjacency_matrix should model BidirectionalGraph ebf 993 Variant should use least common multiple of alignments_ rather than maximum ebf 965 [doc] boost::variant tutorial - final example uses v1_v2 should be seq1_seq2 ebf 547 [variant] Compile time checked getter eric_niebler 1119 enable_reference_tracking copy constructor does not call base class version eric_niebler 1071 Request for BOOST_REVERSE_FOREACH and rationale fcacciola 282 boost::optional<enum> fails with /CLR fcacciola 818 No zero-argument in_place() fcacciola 617 Numeric Conversion Documentation minor bug garcia 1045 [multi_array] Need a proper swap operation grafik 1203 Decouple the backend grafik 1146 KAI Referenced in compiler status acknowledgements grafik 1135 bjam crashes grafik 1128 boost-buil rule does not overrule BOOST_BUILD_PATH grafik 1088 Docs for template escape feature. grafik 1074 FreeBSD specific patches to boost 1.34.0 grafik 1041 Cygwin requires PATH setting. grafik 1040 boost.devel archive at ActiveState disconnected grafik 1031 AmigaOS fixes for bjam grafik 1023 inspect grafik 989 Boost build does not support building universal binaries on macintosh grafik 714 [jam] HardLink rule on NT platform grafik 94 Better reporting of failed expectation. grafik 93 Testing problems on AIX and OSF grafik 1062 Cygwin install stage fails with combination of patches grafik 977 bjam crashes when compiled with gcc 4.2 grafik 959 linking fails when Boost is compiled with STLport 5.1.* on Linux (names mismatch) grafik 896 <native-wchar_t>off does not work when build with vc-8.0 grafik 798 bjam: always define OSPLAT grafik 721 Generated files "@()" don't work in regular expressions. grafik 683 libraries won't build grafik 616 Boost Jam_ and non english directorys grafik 552 Building universal binary on MacOSX grafik 546 boost.build needs fixes for HP/UX grafik 497 Unable to build boost with Dinkumware STL version 4.02 grafik 481 Linker Problems with VC .NET 2003 / STLPort / Boost grafik 431 boost jam problem with parallel builds hkaiser 1077 Spirit integer parser does not always detect integer overflow hubert_holin 647 octonion documentation bug hubert_holin 162 Cannot compile octonion_test.cpp because of bug in sinc.hpp igaztanaga 1080 boost::interprocess win32 global file mapping issue jbandela 665 bug in char_separator jbandela 501 token_iterator::at_end() result is inversed jbandela 306 Visual C++ "Language Extensions" support jbandela 283 Compiler error for tokenizer on Solaris jbandela 279 SLOOOWW tokenizer compilation on VC++6.0 jbandela 259 Problem compiling :/ jmaurer 920 Proposed extension to random library jmaurer 819 uniform_int<> with type's maximum availaible range error jmaurer 351 Diff in state of mersenne_twister gen between GCC3.41 & CW9 johnmaddock 1178 Regular expression min match length johnmaddock 1148 boost_1_34_1 regex library compile failure on aix with xlv johnmaddock 1130 GCC -wundef warnings johnmaddock 1105 Add BOOST_NO_STD_TYPEINFO or inject ::type_info into std johnmaddock 1104 Add BOOST_NO_TYPEID johnmaddock 1103 Add BOOST_NO_IOSFWD johnmaddock 1102 Add BOOST_NO_IOSTREAM johnmaddock 1083 boost_regex 1.34.0 uses ICU library without linking to it johnmaddock 1081 Empty string rejected as perl-style regex johnmaddock 1075 [doc] incorrect comment johnmaddock 1008 Undocumented type traits. johnmaddock 905 Assertion failed in token_iterator.hpp johnmaddock 871 Problem build boost 1.33.1 on Aix 4.3.3 johnmaddock 883 errors when build with Apache stdcxx johnmaddock 764 [regex] add support for a BOOST_NO_CREGEX mode johnmaddock 633 [config] evc4 port johnmaddock 591 make portable stdint.h from boost code johnmaddock 540 Please add support for Borland C++ Builder 2006 johnmaddock 502 Problem running configure for unsupported platform johnmaddock 492 Adding boost::is_complex to type_traits.hpp johnmaddock 315 Implement operator[] for Tokenizer jsiek 900 graphml reader namespace handling is broken jsiek 875 No iterator based constructor for adjacency_matrix jsiek 815 remove_edge core dumps on self-circle jsiek 813 concept_check.hpp unused variable warning jsiek 694 Add Maximum Common Subgraph (MCS) algorithm jsiek 636 strange compiling problem for transitive_closure jsiek 580 Max Flow Algorithm jsiek 575 Calling subgraph::global_to_local on a root graph jsiek 541 [concept_check.hpp] remove unused variable warning in msvc jsiek 416 Spelling of Edmonds-Karp-Algorithm jsiek 193 Check ordering for mutexes jsiek 182 Support aspect-orientation jsiek 100 more use of the concept "allocator" kevlin 913 Specialization of lexical_cast mark_rodgers 821 allow_unregistered improvement mark_rodgers 558 add database library? mark_rodgers 87 function to get the size of a array mark_rodgers 30 parser mistevens 688 ublas: bug in mapped_vector_of_mapped_vector nesotto 1151 [range] make_indirect_range() nesotto 1145 Small bugs in Boost.Range documentation nesotto 1027 [ptr_container] optional serialization support nesotto 807 boost::assignment documentation: mathematical "typo" nesotto 730 The ptr_map iterator cannot be dereference to value type nesotto 518 [Boost.Range]boost::const_begin calls non-qualified 'begin' nesotto 471 boost.range and "const char[]". nesotto 723 local_time_facet error in VS2005 Win2003 nobody 922 Lexical cast and wide characters nobody 884 [iostreams] workaround for the boost + stdcxx on MSVC 7.1 nobody 795 [ublas] vector::back() pavol_droba 1152 rle_example fails pdimov 1114 Request for shared_ptr::type and shared_ptr::pointer pdimov 1113 shared_array<T> should convert to shared_array<T const> pdimov 1111 boost::bind objects should expose function_type and list_type pdimov 1110 Add a release method to scoped_array pdimov 1109 intrusive_ptr needs a helper base class pdimov 1108 shared_ptr does not compile under g++ with -fno-rtti pdimov 1107 Add weak_use_count to weak_ptr as a debugging aid pdimov 1106 shared_ptr<T> should not convert to shared_ptr<U> when T* doesn't convert to U* pdimov 997 error in boost::bind doc pdimov 810 support for weak_ptr binding pdimov 445 Can't delete automatically in circularly included object. pdimov 398 Support for embedded VC++ 4.0 ramey 1143 Archive headers appear to be missing multiple(?) include files ramey 1142 boost/serialization/optional doesn't include necessary header ramey 1141 Dangerious operator<< for wostream ramey 1137 Virtual destructor is missing ramey 1121 xml_archive_exception is missing seperate header file_ and documentation mismatch ramey 1086 Serialization of weak_ptr produces invalid XML ramey 1038 "<" and ">" should be excaped in xml_oarchive ramey 1036 assert failure in oserializer.hpp:418 ramey 969 basic_binary_iprimitive::load_binary bug ramey 968 xml_grammar - incorrect define char ramey 961 boost::basic_binary_oprimitive not instantiated correctly ramey 874 Ability to partially specialize implementation_level ramey 757 xml serialization fails when using namespace ramey 878 error C2039: 'mbstate_t' : is not a member of 'std' rogeeff 1169 errors in tutorial for test framework "new_year_resolution" rogeeff 1136 Let BOOST_CHECK_EQUAL support std::wstring rogeeff 1060 no example sources in online docs for Boost::Test rogeeff 1050 BOOST_CHECK_CLOSE_FRACTION documentation missing rogeeff 1032 typo in Boost.Test documentation rogeeff 1030 execution_monitor.ipp #warning directive breaks compilation on MSVC 8.0 rogeeff 999 prg_exec_fail3 fails on release variant rogeeff 998 prg_exec_fail2 fail on ppc rogeeff 962 Missing links in Test library documentation rogeeff 956 Doc error in test examples. rogeeff 893 grammatical error in error message rogeeff 847 [Test Library] How to init/free a singleton rogeeff 762 [test] evc4 issue with SEH support rogeeff 747 failing on 6 targets in MacOS X rogeeff 645 [test] no eh exception handling functions on evc4 samuel_k 585 64 bit compile warning/error for boost::format samuel_krempp 1196 Patch: when BOOST_NO_STD_LOCALE is not defined_ boost/format/internals.hpp fails to compile. samuel_krempp 1195 patch: boost/format/parsing.hpp does not compile if BOOST_NO_LOCALE_ISDIGIT is defined samuel_krempp 859 boost::format ignores a user defined locale samuel_krempp 980 boost.format vc8/win32 compilation warning samuel_krempp 704 format zero length string msvc-8 shammah 840 pool allocator - local variable shadow patch shammah 836 warning using pool.hpp shammah 386 boost::pool_allocator breaks with vector of vectors shammah 290 perfomance: memory cleanup for pool takes too long shammah 284 pool::purge_memory() does not reset next_size shammah 88 ct_gcd_lcm.hpp compilation error 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 869 [iostreams] patch for building by BBv2 turkanis 856 iostreams file_descriptor::write fails under Win32 turkanis 822 Incorrect usage of bad_write()_ bad_seek() etc. turkanis 817 Performance problem in iostreams turkanis 791 iostreams::tee_filter is for output only turkanis 786 bug in iostreams/copy.hpp line 81 turkanis 699 Changing size of memory-mapped file on Windows turkanis 586 iostreams // file_descriptor::seek BUG on files > 4 GB turkanis 579 boost.iostreams file_descriptor and sharing turkanis 525 problem with boost::iostreams when compiled with Visual C++ turkanis 484 Boost.Iostreams and newline translation urzuga 864 [lambda][utility] Make lambda support result<> urzuga 781 Lambda: (_1 + "y")(string("x")) Doesn't Compile urzuga 574 [boost::lambda] Compile error with libstdc++ debug mode urzuga 426 lambda vs pure virtual functions vladimir_prus 1186 Lack of 64-bit address model support using Sun Studio C++ vladimir_prus 1177 Various bugs in STLport jamfile vladimir_prus 1165 more quoting problems vladimir_prus 1132 program_options documentation error. vladimir_prus 1129 Standalone doc_ outdated path from homepage vladimir_prus 1058 Cygwin libraries & GNU libtool vladimir_prus 985 Free features don't work when building boost vladimir_prus 850 program_options strips off escaped quotes in some situations vladimir_prus 689 [program_options] Endless loop with long default arguments vladimir_prus 674 find-library for boost decorated names vladimir_prus 469 multitoken broken witt 1046 Boost.Python quickstart instructions mention nonexistent target witt 973 zip_iterator has value_type == reference witt 957 The "Getting Started" page does not mention the stdlib option witt 834 Homepage regression links witt 145 filter iterator adaptor should be able to be bidirectional -- -- 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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[intrusive] iterator_to naming and default disposer
by Cory Nelson 23 Aug '07

23 Aug '07

Hi Ion, Given that iterator_to turns a reference into an iterator, shouldn't this be to_iterator? Also with the clear/erase_and_dispose functions could there be a default disposer that calls delete? Thanks! -- Cory Nelson

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[rfc] small flags library
by Iain Denniston 23 Aug '07

23 Aug '07

[Uploaded to the vault (flags_v1.zip) – complete with docs and test file (no jam file yet – sorry) - tested in vc8 and MinGW GCC 3.4.2.] I’ve proposed this before and gotten a little interest – so I figured I’d try again (particularly now that 1.34.1 is out) and see if I could get some more interest! At its most simple, it’s a way to stop function users providing difficult to detect erroneous data. The best way to work out what this lib does is probably read the docs I uploaded, but for here I’ll take one of the examples I use from the docs: using boost::flags enum foo { foo_1 = 1<<0, foo_2 = 1<<1, }; enum bar { bar_1 = 1<<2, bar_2 = 1<<3, }; void func1(unsigned int options) { //do stuff } void func2(flags<foo> options) { //do stuff } int main(int argc, char * argv[]) { func1(foo_1 | foo_2 | bar_1 | bar_2); //Compiles fine func2(flags<foo>(foo_1) | foo_2 | bar_1 | bar_2); //Compile time error - cannot convert bar to foo } Additionally, sometimes it is useful to force the user to supply a flag rather than allow them to supply none (i.e. '0') - the flags_no_default provides this functionality. The library is not very big and it’s not very clever :) but the hope is to push errors back to compile time, at little or no runtime cost. If people are interested or not either way it’s cool – but since it’s now in the vault anyone can use it if they want. Hope it all makes sense! Questions/comments/criticism gratefully received. IAIN

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Limitation of liability in Boost License
by Stephan Tolksdorf 23 Aug '07

23 Aug '07

Hi all IANAL but AFAIK the Boost License's disclaimer of warranty and liability is invalid under German law (irrespective whether the licensee is a consumer or not). I'd guess that similar can be said about some other jurisdictions in Europe or elsewhere. I'm curious, is this a matter of concern for anyone, in particular for corporate contributors? Best regards, Stephan

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Re: [boost] Old, Old bugs.
by Philippe Vaucher 23 Aug '07

23 Aug '07

> #17 Socket wrapper class asio az_sw_dude > <http://svn.boost.org/trac/boost/ticket/17> I just wanted to point out that this ticked should be closed because boost::asio will address it. Philippe

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Re: [boost] ScopeExit
by Steven Watanabe 23 Aug '07

23 Aug '07

AMDG Sorry about responding to a digest. Gmane is down. Alexander Nasonov wrote: > > How about this? > > int BOOST_LOCAL_FUNCTION( (v) ) (int i) > { > return v = i; > } BOOST_LOCAL_FUNCTION_END > > <snip> Nice way to handle the return type. You would need a base class and dynamic allocation right? Also, I need to be able to specify the name of the function somehow and I am not sure how this can be accomplished with that interface. Here's what I have right now: template<class Tuple, class F> struct local_function; #define BOOST_LOCAL_FUNCTION_DEF(z, n, data)\ template<class Tuple class R BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, class T)>\ struct local_function<Tuple, R(BOOST_PP_ENUM_PARAMS_Z(z, n, T))> {\ Tuple tuple;\ R (*f)(BOOST_PP_ENUM_TRAILING_PARAMS_Z(z, n, T));\ local_function(const Tuple& t) : tuple(t) {}\ R operator()(BOOST_PP_ENUM_SHIFTED_BINARY_PARAMS_Z(z, n, T, t)) {\ return(f(tuple BOOST_PP_ENUM_SHIFTED_TRAILING_PARAMS_Z(z, n, t)))\ }\ }; BOOST_PP_REPEAT(BOOST_PP_INC(BOOST_LOCAL_FUNCTION_MAX_ARITY), BOOST_LOCAL_FUNCTION_DEF, ~) So that int BOOST_LOCAL_FUNCTION(name, (i)(j), (int x)(int y)) { //body here } BOOST_LOCAL_FUNCTION_END expands to int result_tag; typedef BOOST_TYPEOF(result_tag) result_type; typedef BOOST_TYPEOF(i) type_0; typedef BOOST_TYPEOF(j) type_1; typedef boost::tuple<type_0, type_1> tuple_type; typedef local_function<tuple_type, result_type(tuple_type, int x, int y)> function_type; function_type name(make_tuple(i, j)); { function_type* function_ptr = &name; struct body { result_type impl(tuple_type& args, int x, int y) { type_0& i = boost::get<0>(args); type_1 j = boost::get<1>(args); { //body here } } }; function_ptr->f = &body::impl; } Note that i and j are passed by value rather than by reference. Otherwise, it is not safe to have a copy of the function around after control leaves the scope it is defined in. In Christ, Steven Watanabe

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Re: [boost] ScopeExit Review ends tomorrow
by Tom Brinkman 23 Aug '07

23 Aug '07

> No. I fear that this macro, along with the "FOR_EACH" macro, that > boost developers are warming up to "macros" in general. We should > stick to standard syntax, even if the standard syntax is verbose and > ugly. Macros always come back to bite you. My no vote is sole > based on my dislike of macros. Macros internal to a library are > fine, but for a public interface, I'm not persuaded. >> I disagree with that in just about every way; it seems like the worst >> kind of FUD, and it's factually inaccurate to boot. Dave, your feelings about "macros" are well known. Your MPL library, which I use, and your book, which I have purchased, have made an important contribution to the C++ community. However, If I have one criticisism, its your overuse and dependence on macros. Neverthless, if they are hidden in the library, and I as a user dont have to see or know about them, I could care less. That is, unless, I was the unfortunate soul that had to maintain a library that had many internal macros. >> Boost developers in general have been warm to "macros" ever since >> BOOST_STATIC_ASSERT, which was one of the very first public >> Boost library components. I stand corrected, as you say, boost developers have always generally been "warm" to macros. >> use macros *extensively* throughout many libraries, and, when >> appropriate, in library interfaces. In nine years they haven't "come >> back to bite us. Couldn't disagree with your point more here. The boost libraries that are full of macros are very difficult to maintain and extend for all but the original library authors. If the boost developers suddenly retired, who will maintain those libraries that make extensive use of macros. That could come back to bite the users if in in the years ahead, the original library author has moved on. Not saying that will happen, but its a concern of mine, and keeps me from becoming to dependent on those libraries. >> I think that in many cases have shown themselves to be >> superior to any available alternative. Also I disagree here as well. BOOST_STATIC_ASSERT is one of a few macros that you could argue that should be included as public interface of boost. I suspect that If we were study this issue in depth, there would be very few examples of "public" macros that would be superior to their alternatives. "Non-public" internal macros, shur, the library author should be allowed to explore the creative use of macros all they want.

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Proposed library
by Jake hall 23 Aug '07

23 Aug '07

I would like to hear peoples thought on a library i uploaded to the vault and maybe get it submitted for review. the libraries name is the EventHandler library, it can be found in the vault under home / Generic Programming / EventHandler.zip i find it simple to use (well i wrote it so i should) but effective at adding almost .net style events to classes

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