November 2005 - Boost - lists.boost.org

property_tree library revision 3
by Marcin Kalicinski 29 Nov '05

29 Nov '05

Is available in vault and sandbox cvs. Main changes: - possible to use policy-defined ptree data type instead of string (e.g. boost::any) - INFO file format has now formal grammar specified (in boost::spirit format actually, so it can not only be studied but also tested) - more examples, small bugfixes, doc updates Marcin

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[range]Does boost::copy_range work under VC++6 ?
by MB 29 Nov '05

29 Nov '05

Hi, I heard VC6 has fatal problems in the case that 'explicit template arguments' are required. Current Implementation is: template< typename SeqT, typename Range > inline SeqT copy_range( const Range& r ) { return SeqT( begin( r ), end( r ) ); } Workaround is something like: template< typename SeqT, typename Range > inline SeqT copy_range( const Range& r BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE(SeqT)) { return SeqT( boost::begin( r ), boost::end( r ) ); } Regards, MB http://p-stade.sourceforge.net/ -------------------------------------- STOP HIV/AIDS. Yahoo! JAPAN Redribbon Campaign 2005 http://pr.mail.yahoo.co.jp/redribbon/

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[1.33.1] Preparing for release
by Doug Gregor 29 Nov '05

29 Nov '05

Boost 1.33.1 will be released in 7 days. The following issues will need to be cleared up before that can happen: - GCC 2.95.3 failures that I introduced (and have fixed; the should disappear "soon") - Spirit switch_p failures on GCC 4.0.2, which is now a release platform. We have a patch awaiting approval that should fix this. If there are any other problems that should be addressed, please respond *immediately* so that we can address them. Prerelease tarballs will be available within the next few days. Doug Gregor 1.33.x Release Manager

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[1.33.1] [Spirit] Switch on GCC 4.0.2?
by Douglas Gregor 28 Nov '05

28 Nov '05

GCC 4.0.2 is failing on some of the "switch" tests for Spirit. Would one of the Spirit developer please take a look at these? I'd like to get full support for GCC 4.0.2 into 1.33.1, if possible. http://engineering.meta-comm.com/boost-regression/CVS-RC_1_33_0/ developer/spirit.html Doug

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Boost.Python: patch for gcc 3.2
by Graham Bennett 28 Nov '05

28 Nov '05

Hi all, Attached is a small patch that I applied to get Boost.Python in 1.33 to build correctly with gcc 3.2. It works around a bug mentioned here: http://lists.debian.org/debian-gcc/2003/09/msg00055.html, where a type is used before it is declared in cxxabi.h. The problem seems to be fixed in gcc 3.4. cheers, Graham. -- Graham Bennett

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Boost regression notification (2005-11-28 [RC_1_33_0])
by Douglas Gregor 28 Nov '05

28 Nov '05

Boost regression test failures ------------------------------ Report time: 2005-11-28T14:25:31Z This report lists all regression test failures on release platforms. WARNING: The following libraries have failing regression tests but do not have a maintainer on file. Once a maintainer is found, add an entry to libs/maintainers.txt to eliminate this message. tokenizer format utility crc integer any Detailed report: http://engineering.meta-comm.com/boost-regression/CVS-RC_1_33_0/developer/i… 120 failures in 20 libraries: algorithm/minmax (2) any (1) assign (6) config (1) crc (1) disjoint_sets (1) format (3) functional/hash (14) integer (1) iostreams (28) lambda (14) numeric/conversion (1) numeric/interval (3) random (1) regex (5) test (16) thread (14) tokenizer (1) tuple (2) utility (5) |algorithm/minmax| minmax: gcc-2.95.3-linux minmax_element: gcc-2.95.3-linux |any| any_to_ref_test: gcc-2.95.3-linux |assign| basic: gcc-2.95.3-linux list_of: gcc-2.95.3-linux list_of_workaround: gcc-2.95.3-linux static_list_of: gcc-2.95.3-linux std: gcc-2.95.3-linux tuple_list_of: gcc-2.95.3-linux |config| limits_test: gcc-2.95.3-linux |crc| crc_test: gcc-2.95.3-linux |disjoint_sets| disjoint_set_test: gcc-2.95.3-linux |format| format_test1: gcc-2.95.3-linux format_test2: gcc-2.95.3-linux format_test_wstring: gcc-2.95.3-linux |functional/hash| hash_built_in_array_test: gcc-2.95.3-linux hash_custom_test: gcc-2.95.3-linux hash_deque_test: gcc-2.95.3-linux hash_float_test: gcc-2.95.3-linux hash_function_pointer_test: gcc-2.95.3-linux hash_list_test: gcc-2.95.3-linux hash_map_test: gcc-2.95.3-linux hash_number_test: gcc-2.95.3-linux hash_pointer_test: gcc-2.95.3-linux hash_range_test: gcc-2.95.3-linux hash_set_test: gcc-2.95.3-linux hash_string_test: gcc-2.95.3-linux hash_value_array_test: gcc-2.95.3-linux hash_vector_test: gcc-2.95.3-linux |integer| integer_traits_test: gcc-2.95.3-linux |iostreams| array_test: gcc-2.95.3-linux auto_close_test: gcc-2.95.3-linux buffer_size_test: gcc-2.95.3-linux bzip2_test: gcc-2.95.3-linux component_access_test: gcc-2.95.3-linux compose_test: gcc-2.95.3-linux copy_test: gcc-2.95.3-linux counter_test: gcc-2.95.3-linux example_test: gcc-2.95.3-linux file_descriptor_test: gcc-2.95.3-linux file_test: gcc-2.95.3-linux filtering_stream_test: gcc-2.95.3-linux flush_test: gcc-2.95.3-linux invert_test: gcc-2.95.3-linux line_filter_test: gcc-2.95.3-linux mapped_file_test: gcc-2.95.3-linux newline_test: gcc-2.95.3-linux null_test: gcc-2.95.3-linux pipeline_test: gcc-2.95.3-linux positioning_test: gcc-2.95.3-linux regex_filter_test: gcc-2.95.3-linux restrict_test: gcc-2.95.3-linux seekable_file_test: gcc-2.95.3-linux seekable_filter_test: gcc-2.95.3-linux stdio_filter_test: gcc-2.95.3-linux symmetric_filter_test: gcc-2.95.3-linux tee_test: gcc-2.95.3-linux zlib_test: gcc-2.95.3-linux |lambda| algorithm_test: gcc-2.95.3-linux bind_tests_advanced: gcc-2.95.3-linux bind_tests_simple: gcc-2.95.3-linux bind_tests_simple_f_refs: gcc-2.95.3-linux bll_and_function: gcc-2.95.3-linux constructor_tests: gcc-2.95.3-linux control_structures: gcc-2.95.3-linux exception_test: gcc-2.95.3-linux extending_rt_traits: gcc-2.95.3-linux is_instance_of_test: gcc-2.95.3-linux lambda_cast_test: gcc-2.95.3-linux operator_tests_simple: gcc-2.95.3-linux phoenix_control_structures: gcc-2.95.3-linux switch_construct: gcc-2.95.3-linux |numeric/conversion| udt_example_0: gcc-2.95.3-linux |numeric/interval| cmp: gcc-2.95.3-linux cmp_exp: gcc-2.95.3-linux test_float: gcc-2.95.3-linux |random| random_test: gcc-2.95.3-linux |regex| bad_expression_test: gcc-2.95.3-linux captures_test: gcc-2.95.3-linux object_cache_test: gcc-2.95.3-linux recursion_test: gcc-2.95.3-linux unicode_iterator_test: gcc-2.95.3-linux |test| algorithms_test: gcc-2.95.3-linux auto_unit_test_test: gcc-2.95.3-linux auto_unit_test_test_mult: gcc-2.95.3-linux boost_check_equal_str: gcc-2.95.3-linux class_properties_test: gcc-2.95.3-linux custom_exception_test: gcc-2.95.3-linux errors_handling_test: gcc-2.95.3-linux fixed_mapping_test: gcc-2.95.3-linux ifstream_line_iterator_test: gcc-2.95.3-linux online_test: gcc-2.95.3-linux output_test_stream_test: gcc-2.95.3-linux parameterized_test_test: gcc-2.95.3-linux result_report_test: gcc-2.95.3-linux test_case_template_test: gcc-2.95.3-linux test_fp_comparisons: gcc-2.95.3-linux test_tools_test: gcc-2.95.3-linux |thread| test_barrier: gcc-2.95.3-linux test_barrier_lib: gcc-2.95.3-linux test_condition: gcc-2.95.3-linux test_condition_lib: gcc-2.95.3-linux test_mutex: gcc-2.95.3-linux test_mutex_lib: gcc-2.95.3-linux test_once: gcc-2.95.3-linux test_once_lib: gcc-2.95.3-linux test_thread: gcc-2.95.3-linux test_thread_lib: gcc-2.95.3-linux test_tss: gcc-2.95.3-linux test_tss_lib: gcc-2.95.3-linux test_xtime: gcc-2.95.3-linux test_xtime_lib: gcc-2.95.3-linux |tokenizer| examples: gcc-2.95.3-linux |tuple| io_test: gcc-2.95.3-linux tuple_test_bench: gcc-2.95.3-linux |utility| compressed_pair_test: gcc-2.95.3-linux iterators_test: gcc-2.95.3-linux next_prior_test: gcc-2.95.3-linux operators_test: gcc-2.95.3-linux ref_test: gcc-2.95.3-linux

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Boost regression notification (2005-11-28 [HEAD])
by Douglas Gregor 28 Nov '05

28 Nov '05

Boost regression test failures ------------------------------ Report time: 2005-11-28T06:00:11Z This report lists all regression test failures on release platforms. WARNING: The following libraries have failing regression tests but do not have a maintainer on file. Once a maintainer is found, add an entry to libs/maintainers.txt to eliminate this message. io Detailed report: http://engineering.meta-comm.com/boost-regression/CVS-HEAD/developer/issues… 360 failures in 18 libraries: concept_check (15) foreach (5) graph (3) io (1) math (1) mpl (1) multi_array (7) parameter (12) program_options (56) python (56) regex (5) serialization (30) smart_ptr (1) spirit (3) tr1 (104) typeof (21) wave (9) xpressive (30) |concept_check| stl_concept_covering: cw-9_4 cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux gcc-3.3.6-linux gcc-3.4.4-linux gcc-3_3-darwin gcc-3_4_3-sunos gcc-4_0-darwin intel-win32-8_1 intel-win32-9_0 intel-win32-9_0 mingw-3_4_2 vc-7_1 vc-7_1 |foreach| array_byref: intel-win32-8_1 array_byval: intel-win32-8_1 rvalue_const: intel-win32-9_0 stl_byref: intel-win32-8_1 stl_byval: intel-win32-8_1 |graph| graphviz_test: vc-7_1 vc-7_1 layout_test: intel-win32-9_0 |io| ios_state_unit_test: intel-win32-9_0 |math| complex_test: gcc-3_4_3-sunos |mpl| size_t: gcc-4_0-darwin |multi_array| access: cw-9_4 assign: cw-9_4 assign_to_array: cw-9_4 idxgen1: cw-9_4 index_bases: cw-9_4 iterators: cw-9_4 slice: cw-9_4 |parameter| basics: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux efficiency: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux macros: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux sfinae: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux tutorial: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux unnamed: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux |program_options| cmdline_test: cw-9_4 intel-win32-8_1 mingw-3_4_2 vc-7_1 vc-7_1 cmdline_test_dll: cw-9_4 vc-7_1 vc-7_1 options_description_test: cw-9_4 intel-win32-8_1 mingw-3_4_2 vc-7_1 vc-7_1 options_description_test_dll: cw-9_4 vc-7_1 vc-7_1 parsers_test: cw-9_4 intel-win32-8_1 mingw-3_4_2 vc-7_1 vc-7_1 parsers_test_dll: cw-9_4 vc-7_1 vc-7_1 positional_options_test: cw-9_4 intel-win32-8_1 mingw-3_4_2 vc-7_1 vc-7_1 positional_options_test_dll: cw-9_4 vc-7_1 vc-7_1 unicode_test: cw-9_4 intel-win32-8_1 vc-7_1 vc-7_1 unicode_test_dll: cw-9_4 vc-7_1 vc-7_1 variable_map_test: cw-9_4 intel-win32-8_1 mingw-3_4_2 vc-7_1 vc-7_1 variable_map_test_dll: cw-9_4 vc-7_1 vc-7_1 winmain: cw-9_4 intel-win32-8_1 mingw-3_4_2 vc-7_1 vc-7_1 winmain_dll: cw-9_4 mingw-3_4_2 vc-7_1 vc-7_1 |python| andreas_beyer: vc-7_1 args: vc-7_1 auto_ptr: vc-7_1 back_reference: vc-7_1 ben_scott1: vc-7_1 bienstman1: vc-7_1 bienstman2: vc-7_1 bienstman3: vc-7_1 builtin_converters: vc-7_1 callbacks: vc-7_1 const_argument: vc-7_1 crossmod_exception: vc-7_1 data_members: vc-7_1 defaults: vc-7_1 dict: vc-7_1 docstring: vc-7_1 enum: vc-7_1 exception_translator: vc-7_1 extract: vc-7_1 implicit: vc-7_1 injected: vc-7_1 iterator: vc-7_1 keywords: vc-7_1 list: vc-7_1 long: vc-7_1 map_indexing_suite: vc-7_1 minimal: vc-7_1 multi_arg_constructor: vc-7_1 nested: vc-7_1 numpy: vc-7_1 object: vc-7_1 opaque: vc-7_1 operators: vc-7_1 pearu1: vc-7_1 pickle1: vc-7_1 pickle2: vc-7_1 pickle3: vc-7_1 pickle4: vc-7_1 pointer_vector: vc-7_1 polymorphism: vc-7_1 polymorphism2: vc-7_1 polymorphism2_auto_ptr: vc-7_1 properties: vc-7_1 raw_ctor: vc-7_1 return_arg: vc-7_1 shared_ptr: vc-7_1 slice: vc-7_1 staticmethod: vc-7_1 stl_iterator: vc-7_1 str: vc-7_1 test_pointer_adoption: vc-7_1 try: vc-7_1 tuple: vc-7_1 vector_indexing_suite: vc-7_1 virtual_functions: vc-7_1 wrapper_held_type: vc-7_1 |regex| grep: cw-9_4 intel-win32-8_1 mingw-3_4_2 vc-7_1 vc-7_1 |serialization| test_class_info_load_binary_archive: gcc-3_3-darwin gcc-3_4_3-sunos gcc-4_0-darwin test_class_info_load_binary_archive_dll: gcc-3_3-darwin gcc-3_4_3-sunos gcc-4_0-darwin test_class_info_load_text_archive: gcc-3_3-darwin gcc-3_4_3-sunos gcc-4_0-darwin test_class_info_load_text_archive_dll: gcc-3_3-darwin gcc-3_4_3-sunos gcc-4_0-darwin test_class_info_load_text_warchive: gcc-3_3-darwin gcc-3_4_3-sunos gcc-4_0-darwin test_class_info_load_text_warchive_dll: gcc-3_3-darwin gcc-3_4_3-sunos gcc-4_0-darwin test_class_info_load_xml_archive: gcc-3_3-darwin gcc-3_4_3-sunos gcc-4_0-darwin test_class_info_load_xml_archive_dll: gcc-3_3-darwin gcc-3_4_3-sunos gcc-4_0-darwin test_class_info_load_xml_warchive: gcc-3_3-darwin gcc-3_4_3-sunos gcc-4_0-darwin test_class_info_load_xml_warchive_dll: gcc-3_3-darwin gcc-3_4_3-sunos gcc-4_0-darwin |smart_ptr| shared_ptr_alloc2_test: cw-9_4 |spirit| multi_pass_compile_tests: intel-win32-8_1 traverse_tests: intel-win32-9_0 traverse_tests_debug: intel-win32-9_0 |tr1| run_complex_overloads: cw-9_4 gcc-3_4_3-sunos std_run_complex_overloads: cw-9_4 gcc-3_4_3-sunos std_run_random: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux std_test_array: cw-9_4 std_test_bind: cw-9_4 std_test_boost: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux std_test_complex: cw-9_4 std_test_function: cw-9_4 std_test_hash: cw-9_4 std_test_mem_fn: cw-9_4 std_test_random: cw-9_4 std_test_regex: cw-9_4 std_test_result_of: cw-9_4 std_test_tr1_include: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux std_test_tuple: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux std_test_type_traits: cw-9_4 test_bind: cw-9_4 test_complex: cw-9_4 test_exception: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux test_function: cw-9_4 test_hash: cw-9_4 test_mem_fn: cw-9_4 test_new: gcc-2.95.3-stlport-4.6.2-linux test_random: cw-9_4 test_reference_wrapper: cw-9_4 test_result_of: cw-9_4 test_shared_ptr: cw-9_4 test_stdexcept: gcc-2.95.3-stlport-4.6.2-linux test_tr1_include: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux test_tuple: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux test_utility: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux tr1_add_const_test: cw-9_4 tr1_add_cv_test: cw-9_4 tr1_add_pointer_test: cw-9_4 tr1_add_reference_test: cw-9_4 tr1_add_volatile_test: cw-9_4 tr1_aligned_storage_test: cw-9_4 tr1_alignment_of_test: cw-9_4 tr1_extent_test: cw-9_4 tr1_has_nothrow_assign_test: cw-9_4 tr1_has_nothrow_constr_test: cw-9_4 tr1_has_nothrow_copy_test: cw-9_4 tr1_has_trivial_assign_test: cw-9_4 tr1_has_trivial_constr_test: cw-9_4 tr1_has_trivial_copy_test: cw-9_4 tr1_has_trivial_destructor_test: cw-9_4 tr1_has_virtual_destructor_test: cw-9_4 tr1_is_arithmetic_test: cw-9_4 tr1_is_array_test: cw-9_4 tr1_is_base_of_test: cw-9_4 tr1_is_class_test: cw-9_4 tr1_is_compound_test: cw-9_4 tr1_is_const_test: cw-9_4 tr1_is_convertible_test: cw-9_4 tr1_is_empty_test: cw-9_4 tr1_is_enum_test: cw-9_4 tr1_is_floating_point_test: cw-9_4 tr1_is_function_test: cw-9_4 tr1_is_fundamental_test: cw-9_4 tr1_is_integral_test: cw-9_4 tr1_is_member_func_test: cw-9_4 tr1_is_member_obj_test: cw-9_4 tr1_is_member_pointer_test: cw-9_4 tr1_is_object_test: cw-9_4 tr1_is_pod_test: cw-9_4 tr1_is_pointer_test: cw-9_4 tr1_is_polymorphic_test: cw-9_4 tr1_is_reference_test: cw-9_4 tr1_is_same_test: cw-9_4 tr1_is_scalar_test: cw-9_4 tr1_is_signed_test: cw-9_4 tr1_is_union_test: cw-9_4 tr1_is_unsigned_test: cw-9_4 tr1_is_void_test: cw-9_4 tr1_is_volatile_test: cw-9_4 tr1_rank_test: cw-9_4 tr1_remove_all_extents_test: cw-9_4 tr1_remove_const_test: cw-9_4 tr1_remove_cv_test: cw-9_4 tr1_remove_extent_test: cw-9_4 tr1_remove_pointer_test: cw-9_4 tr1_remove_reference_test: cw-9_4 tr1_remove_volatile_test: cw-9_4 tr1_tricky_abstract_type_test: cw-9_4 tr1_tricky_add_pointer_test: cw-9_4 tr1_tricky_function_type_test: cw-9_4 tr1_tricky_incomplete_type_test: cw-9_4 tr1_tricky_is_enum_test: cw-9_4 tr1_tricky_partial_spec_test: cw-9_4 |typeof| data_member_native: cw-9_4 function_native: cw-9_4 function_ptr_native: cw-9_4 function_ref_native: cw-9_4 lvalue_native: cw-9_4 member_function_native: cw-9_4 modifiers_emulation: cw-9_4 cw-9_4 modifiers_native: cw-9_4 cw-9_4 noncopyable_native: cw-9_4 std_emulation: cw-9_4 cw-9_4 std_native: cw-9_4 template_dependent_native: cw-9_4 template_enum_native: cw-9_4 template_int_native: cw-9_4 template_multiword_native: cw-9_4 template_tpl_native: cw-9_4 template_type_native: cw-9_4 type_native: cw-9_4 |wave| testwave: cw-9_4 intel-win32-8_1 mingw-3_4_2 vc-7_1 vc-7_1 testwave_dll: cw-9_4 intel-win32-8_1 vc-7_1 vc-7_1 |xpressive| misc1: cw-9_4 test1: cw-9_4 test1u: cw-9_4 test2: cw-9_4 test2u: cw-9_4 test3: cw-9_4 test3u: cw-9_4 test4: cw-9_4 test4u: cw-9_4 test5: cw-9_4 test5u: cw-9_4 test6: cw-9_4 test6u: cw-9_4 test7: cw-9_4 test7u: cw-9_4 test8: cw-9_4 test8u: cw-9_4 test9: cw-9_4 test9u: cw-9_4 test_basic_regex: cw-9_4 test_cycles: cw-9_4 test_dynamic: cw-9_4 test_match_results: cw-9_4 test_non_char: cw-9_4 test_regex_algorithms: cw-9_4 test_regex_compiler: cw-9_4 test_regex_iterator: cw-9_4 test_regex_primitives: cw-9_4 test_regex_token_iterator: cw-9_4 test_static: cw-9_4

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porting the Boost libraries to x64 (em64t, amd64) Windows platform
by Norian N 28 Nov '05

28 Nov '05

Hi all, There are some Windows applications using some of Boost libraries and have to be ported to x64 (em64t, amd64) platform. Does anybody have information on followed topics: - is the x64 porting in nearest plans (MS VC 8 or Intel 9 compilers) ? - who from Boost team is interested in the x64 on Windows porting ? - can I participate in x64 porting ? Please contact me directly if you wish to reduce spam. Thanks, Dmitry Solodkiy, SW engineer, Intel

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Re: [boost] date_time: second_clock and microsec_clock errors
by Roman Yakovenko 28 Nov '05

28 Nov '05

> I'll turn it around the other way. Most instances of > microsecond_clock never > care about the a time_zone to adjust the time. So there is > no reason to drag > in that dependency. But, in fact, the overloading I pointed > out above: > > template<class time_type> > class microsecond_clock { > ... > template<class time_zone_type> > static time_type local_time(shared_ptr<time_zone_type> tz_ptr); > > enables the microsecond clock to use a time zone. When using a > local_date_time type the timezone is required. So it's true, > you'll get a > compile error if you try to call the other overloadings with a > local_date_time, but that's the intent. "... practicality beats purity" It would be nice to have small comment within source code or reference to documentation that explains why this is intent and\or work around to the problem. > Jeff Thanks for help Roman Yakovenko

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Re: [boost] date_time: local_date_time small fix
by Roman Yakovenko 28 Nov '05

28 Nov '05

> > 2. Base class already has those operators, so why do you hide them? > > Unless I'm missing something the base class provides for > comparison to other > local times not ptimes: > > local_date_time l_time1(...), l_time2(...); > if (ltime_1 == ltime_2) {... 1. template<class utc_time_=posix_time::ptime, class tz_type=date_time::time_zone_base<utc_time_> > class local_date_time_base : public date_time::base_time<utc_time_, boost::posix_time::posix_time_system> { 2. template <class T, class time_system> class base_time : private boost::less_than_comparable<T , boost::equality_comparable<T > > { public: typedef T time_type; //!Equality operator -- others generated by boost::equality_comparable bool operator==(const time_type& rhs) const { return time_system::is_equal(time_,rhs.time_); } As you can see date_time::base_time<utc_time_, boost::posix_time::posix_time_system> do provides comparison operator for ptime. > Jeff Roman Yakovenko

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