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Subobjects placement.
by Adam Badura 18 Sep '05

18 Sep '05

At first english is not my primary language and all my books on C++ are in polish so I have to translate. I'm afraid I'm not using correct words or terms but I will try to be as descripting as possible to be understood. I have a question on placement of subobjects in a class (or struct - what I know of standard this will be the same). In S. Lippman's "Inside the C++ Object Model" I found that standard only guaranties that subobjects are placed in specific sequence (not to get inside details) but there is no guarante that compiler doesn't place some additional objects (for his internal use) at the begining of object in between subobjects or at the end. (I looked also in Stroustrup's "The C++ Programming Language" and "The Design and Evolution of C++" but have found nothing - but I wasn't looking that hard). So, if I have a class: class point2d { public: double x; double y; }; and make an object of it point2d pp = new point2d; than ther is no guaranty that reinterpret_cast<double*>(pp) will give me addres of point2d::x. Normally it no difference but if I want to write a class that for example warps comunication with some hardware than I have to be SURE how data would be allocated in memory becouse it must be correct acording to this hardware specification (if hardware keeps in memory a buffer with a char [for command] and int [for argument]) than I my class members must be so placed in this mamory). Another example is color. If I want to write a class that warps color managemant I want it to be more useable I have to be sure that class class color_argb { public: unsigned char a; unsigned char r; unsigned char g; unsigned char b; }; will use ONLY 4 chars (bytes) and ther will not be any other data placed in memory. If one would be added (for example virtual table pointer) than color_argb could not be used to warp data recevied from and given to many libraries and hardware. I suppose that if I don't use any polimorphism (as virtual functions), inherit only in single line and without virtual base classes and don't use any runtime support that compiler doesn't have any reason to place additional data (but still can use more than 4 bytes to align data for example). But what I know it still MAY do this and relaying on that that it does not have to is dangarous. So how is it? Thanks in advance. Adam Badura

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lock free data structures
by Sashan Govender 17 Sep '05

17 Sep '05

Hi Would there be any interest in a lock free implmentation of common data structures. The goal would be to preserve the integrity of the data in a multi-threaded environment without the use of locks. See http://en.wikipedia.org/wiki/Lock-free_and_wait-free_algorithms for more information. Perhaps a lock-free implementation of the STL might be a good idea?

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Boost regression notification (2005-09-15 [RC_1_33_0])
by Douglas Gregor 17 Sep '05

17 Sep '05

Boost regression test failures ------------------------------ Report time: 2005-09-15T15:07:09Z This report lists all regression test failures on release platforms. Detailed report: http://engineering.meta-comm.com/boost-regression/CVS-RC_1_33_0/developer/i… 594 failures in 12 libraries: concept_check (18) config (1) foreach (1) graph (5) math (3) mpl (1) multi_index (1) random (1) range (3) serialization (549) thread (8) wave (3) |concept_check| stl_concept_covering: borland-5_6_4 cw-8_3 cw-9_4 cw-9_5-darwin gcc-3.2.3-linux gcc-3.3.6-linux gcc-3.4.4-linux gcc-3_3-darwin gcc-4.0.1-linux gcc-4_0-darwin intel-8.1-linux intel-9.0-linux intel-win32-8_1 mingw-3_4_2 vc-6_5 vc-6_5-stlport vc-7_0 vc-7_1 |config| config_test: mingw-3_4_2 |foreach| rvalue_const: vc-7_1 |graph| betweenness_centrality_test: gcc-3.4.4-linux dag_longest_paths: gcc-3.4.4-linux dijkstra_cc: gcc-3.4.4-linux dijkstra_heap_performance: gcc-3.4.4-linux relaxed_heap_test: gcc-3.4.4-linux |math| octonion_test: gcc-4_0-darwin quaternion_test: gcc-4_0-darwin special_functions_test: gcc-4_0-darwin |mpl| size_t: gcc-4_0-darwin |multi_index| test_serialization: intel-win32-9_0 |random| 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test_set_xml_archive_dll: vc-7_1 test_set_xml_warchive: vc-7_1 test_set_xml_warchive_dll: mingw-3_4_2 vc-7_1 test_shared_ptr_132_binary_archive: vc-6_5 vc-6_5-stlport vc-7_1 test_shared_ptr_132_binary_archive_dll: vc-6_5 vc-7_1 test_shared_ptr_132_text_archive: vc-6_5 vc-6_5-stlport vc-7_1 test_shared_ptr_132_text_archive_dll: vc-6_5 vc-7_1 test_shared_ptr_132_text_warchive: vc-6_5 vc-6_5-stlport vc-7_1 test_shared_ptr_132_text_warchive_dll: mingw-3_4_2 vc-6_5 vc-7_1 test_shared_ptr_132_xml_archive: vc-6_5 vc-6_5-stlport vc-7_1 test_shared_ptr_132_xml_archive_dll: vc-6_5 vc-7_1 test_shared_ptr_132_xml_warchive: vc-6_5 vc-6_5-stlport vc-7_1 test_shared_ptr_132_xml_warchive_dll: mingw-3_4_2 vc-6_5 vc-7_1 test_shared_ptr_binary_archive: borland-5_6_4 vc-6_5 vc-7_1 test_shared_ptr_binary_archive_dll: borland-5_6_4 vc-6_5 vc-7_1 test_shared_ptr_text_archive: borland-5_6_4 vc-6_5 vc-7_1 test_shared_ptr_text_archive_dll: borland-5_6_4 vc-6_5 vc-7_1 test_shared_ptr_text_warchive: borland-5_6_4 vc-6_5 vc-7_1 test_shared_ptr_text_warchive_dll: borland-5_6_4 mingw-3_4_2 vc-6_5 vc-7_1 test_shared_ptr_xml_archive: borland-5_6_4 vc-6_5 vc-7_1 test_shared_ptr_xml_archive_dll: borland-5_6_4 vc-6_5 vc-7_1 test_shared_ptr_xml_warchive: borland-5_6_4 vc-6_5 vc-7_1 test_shared_ptr_xml_warchive_dll: borland-5_6_4 mingw-3_4_2 vc-6_5 vc-7_1 test_simple_class_binary_archive: vc-7_1 test_simple_class_binary_archive_dll: vc-7_1 test_simple_class_ptr_binary_archive: vc-7_1 test_simple_class_ptr_binary_archive_dll: vc-7_1 test_simple_class_ptr_text_archive: vc-7_1 test_simple_class_ptr_text_archive_dll: vc-7_1 test_simple_class_ptr_text_warchive: vc-7_1 test_simple_class_ptr_text_warchive_dll: mingw-3_4_2 vc-7_1 test_simple_class_ptr_xml_archive: vc-7_1 test_simple_class_ptr_xml_archive_dll: vc-7_1 test_simple_class_ptr_xml_warchive: vc-7_1 test_simple_class_ptr_xml_warchive_dll: mingw-3_4_2 vc-7_1 test_simple_class_text_archive: vc-7_1 test_simple_class_text_archive_dll: vc-7_1 test_simple_class_text_warchive: vc-7_1 test_simple_class_text_warchive_dll: mingw-3_4_2 vc-7_1 test_simple_class_xml_archive: vc-7_1 test_simple_class_xml_archive_dll: vc-7_1 test_simple_class_xml_warchive: vc-7_1 test_simple_class_xml_warchive_dll: mingw-3_4_2 vc-7_1 test_split_binary_archive: vc-7_1 test_split_binary_archive_dll: vc-7_1 test_split_text_archive: vc-7_1 test_split_text_archive_dll: vc-7_1 test_split_text_warchive: vc-7_1 test_split_text_warchive_dll: mingw-3_4_2 vc-7_1 test_split_xml_archive: vc-7_1 test_split_xml_archive_dll: vc-7_1 test_split_xml_warchive: vc-7_1 test_split_xml_warchive_dll: mingw-3_4_2 vc-7_1 test_tracking_binary_archive: vc-7_1 test_tracking_binary_archive_dll: vc-7_1 test_tracking_text_archive: vc-7_1 test_tracking_text_archive_dll: vc-7_1 test_tracking_text_warchive: vc-7_1 test_tracking_text_warchive_dll: mingw-3_4_2 vc-7_1 test_tracking_xml_archive: vc-7_1 test_tracking_xml_archive_dll: vc-7_1 test_tracking_xml_warchive: vc-7_1 test_tracking_xml_warchive_dll: mingw-3_4_2 vc-7_1 test_unregistered_binary_archive: vc-7_1 test_unregistered_binary_archive_dll: vc-7_1 test_unregistered_text_archive: vc-7_1 test_unregistered_text_archive_dll: vc-7_1 test_unregistered_text_warchive: vc-7_1 test_unregistered_text_warchive_dll: mingw-3_4_2 vc-7_1 test_unregistered_xml_archive: vc-7_1 test_unregistered_xml_archive_dll: vc-7_1 test_unregistered_xml_warchive: vc-7_1 test_unregistered_xml_warchive_dll: mingw-3_4_2 vc-7_1 test_variant_binary_archive: vc-7_1 test_variant_binary_archive_dll: vc-7_1 test_variant_text_archive: vc-7_1 test_variant_text_archive_dll: vc-7_1 test_variant_text_warchive: vc-7_1 test_variant_text_warchive_dll: mingw-3_4_2 vc-7_1 test_variant_xml_archive: vc-7_1 test_variant_xml_archive_dll: vc-7_1 test_variant_xml_warchive: vc-7_1 test_variant_xml_warchive_dll: mingw-3_4_2 vc-7_1 test_vector_binary_archive: vc-7_1 test_vector_binary_archive_dll: vc-7_1 test_vector_text_archive: vc-7_1 test_vector_text_archive_dll: vc-7_1 test_vector_text_warchive: vc-7_1 test_vector_text_warchive_dll: mingw-3_4_2 vc-7_1 test_vector_xml_archive: vc-7_1 test_vector_xml_archive_dll: vc-7_1 test_vector_xml_warchive: vc-7_1 test_vector_xml_warchive_dll: mingw-3_4_2 vc-7_1 |thread| test_barrier_lib: intel-9.0-linux test_condition_lib: intel-9.0-linux test_mutex_lib: intel-9.0-linux test_once_lib: intel-9.0-linux test_read_write_mutex_lib: intel-9.0-linux test_thread_lib: intel-9.0-linux test_tss_lib: intel-9.0-linux test_xtime_lib: intel-9.0-linux |wave| test_re2c_lexer: intel-9.0-linux test_slex_lexer: intel-9.0-linux testwave: intel-9.0-linux

3 2

Boost regression notification (2005-09-17 [RC_1_33_0])
by Douglas Gregor 17 Sep '05

17 Sep '05

Boost regression test failures ------------------------------ Report time: 2005-09-17T19:34:08Z This report lists all regression test failures on release platforms. Detailed report: http://engineering.meta-comm.com/boost-regression/CVS-RC_1_33_0/developer/i… 119 failures in 9 libraries: concept_check (18) foreach (1) graph (5) multi_index (1) random (1) range (3) serialization (79) thread (8) wave (3) |concept_check| stl_concept_covering: borland-5_6_4 cw-8_3 cw-9_4 cw-9_5-darwin gcc-3.2.3-linux gcc-3.3.6-linux gcc-3.4.4-linux gcc-3_3-darwin gcc-4.0.1-linux gcc-4_0-darwin intel-8.1-linux intel-9.0-linux intel-win32-8_1 mingw-3_4_2 vc-6_5 vc-6_5-stlport vc-7_0 vc-7_1 |foreach| rvalue_const: vc-7_1 |graph| betweenness_centrality_test: gcc-3.4.4-linux dag_longest_paths: gcc-3.4.4-linux dijkstra_cc: gcc-3.4.4-linux dijkstra_heap_performance: gcc-3.4.4-linux relaxed_heap_test: gcc-3.4.4-linux |multi_index| test_serialization: intel-win32-9_0 |random| random_test: gcc-3.3.6-linux |range| array: vc-6_5 vc-6_5-stlport vc-7_0 |serialization| test_array_binary_archive: cw-9_5-darwin test_array_binary_archive_dll: cw-9_5-darwin test_array_text_archive: cw-9_5-darwin test_array_text_warchive: cw-9_5-darwin test_array_xml_archive: cw-9_5-darwin test_array_xml_warchive: cw-9_5-darwin test_class_info_load_binary_archive: gcc-3.2.3-linux test_class_info_load_binary_archive_dll: gcc-3.2.3-linux test_class_info_load_text_archive: gcc-3.2.3-linux test_class_info_load_text_archive_dll: gcc-3.2.3-linux test_class_info_load_text_warchive: gcc-3.2.3-linux test_class_info_load_text_warchive_dll: gcc-3.2.3-linux test_class_info_load_xml_archive: gcc-3.2.3-linux test_class_info_load_xml_archive_dll: gcc-3.2.3-linux test_class_info_load_xml_warchive: gcc-3.2.3-linux test_class_info_load_xml_warchive_dll: gcc-3.2.3-linux test_exported_binary_archive: vc-6_5 test_exported_binary_archive_dll: vc-6_5 test_exported_text_archive: vc-6_5 test_exported_text_archive_dll: vc-6_5 test_exported_text_warchive: vc-6_5 test_exported_text_warchive_dll: vc-6_5 test_exported_xml_archive: vc-6_5 test_exported_xml_archive_dll: vc-6_5 test_exported_xml_warchive: vc-6_5 test_exported_xml_warchive_dll: vc-6_5 test_map_xml_archive: vc-6_5 vc-7_0 test_map_xml_archive_dll: vc-6_5 vc-7_0 test_map_xml_warchive: vc-6_5 vc-7_0 test_map_xml_warchive_dll: vc-6_5 vc-7_0 test_no_rtti_binary_archive: vc-6_5 test_no_rtti_binary_archive_dll: vc-6_5 test_no_rtti_text_archive: vc-6_5 test_no_rtti_text_archive_dll: vc-6_5 test_no_rtti_text_warchive: vc-6_5 test_no_rtti_text_warchive_dll: vc-6_5 test_no_rtti_xml_archive: vc-6_5 test_no_rtti_xml_archive_dll: vc-6_5 test_no_rtti_xml_warchive: vc-6_5 test_no_rtti_xml_warchive_dll: vc-6_5 test_shared_ptr_132_binary_archive: vc-6_5 vc-6_5-stlport test_shared_ptr_132_binary_archive_dll: vc-6_5 test_shared_ptr_132_text_archive: vc-6_5 vc-6_5-stlport test_shared_ptr_132_text_archive_dll: vc-6_5 test_shared_ptr_132_text_warchive: vc-6_5 vc-6_5-stlport test_shared_ptr_132_text_warchive_dll: vc-6_5 test_shared_ptr_132_xml_archive: vc-6_5 vc-6_5-stlport test_shared_ptr_132_xml_archive_dll: vc-6_5 test_shared_ptr_132_xml_warchive: vc-6_5 vc-6_5-stlport test_shared_ptr_132_xml_warchive_dll: vc-6_5 test_shared_ptr_binary_archive: borland-5_6_4 vc-6_5 test_shared_ptr_binary_archive_dll: borland-5_6_4 vc-6_5 test_shared_ptr_text_archive: borland-5_6_4 vc-6_5 test_shared_ptr_text_archive_dll: borland-5_6_4 vc-6_5 test_shared_ptr_text_warchive: borland-5_6_4 vc-6_5 test_shared_ptr_text_warchive_dll: borland-5_6_4 vc-6_5 test_shared_ptr_xml_archive: borland-5_6_4 vc-6_5 test_shared_ptr_xml_archive_dll: borland-5_6_4 vc-6_5 test_shared_ptr_xml_warchive: borland-5_6_4 vc-6_5 test_shared_ptr_xml_warchive_dll: borland-5_6_4 vc-6_5 |thread| test_barrier_lib: intel-9.0-linux test_condition_lib: intel-9.0-linux test_mutex_lib: intel-9.0-linux test_once_lib: intel-9.0-linux test_read_write_mutex_lib: intel-9.0-linux test_thread_lib: intel-9.0-linux test_tss_lib: intel-9.0-linux test_xtime_lib: intel-9.0-linux |wave| test_re2c_lexer: intel-9.0-linux test_slex_lexer: intel-9.0-linux testwave: intel-9.0-linux

1 0

[type_traits] [promote] request for fast track review
by alnsn-boost 17 Sep '05

17 Sep '05

I propose to add promote, integral_promotion and floating_point_promotion class templates to type_traits library. You can download it from http://cpp-experiment.sourceforge.net/promote-20050917.tar.gz or browse it online http://cpp-experiment.sourceforge.net/promote-20050917/ I've tried it on different compilers with various success: GNU/Linux (gentoo-hardened): gcc 3.3 and 3.4, Intel 7, 8 and 9 Windows: VC7 free compiler Sparc Solaris: Sun C++ 5.3 and 5.7 See comments at the beginning of promote_enum_test.cpp for what is broken. http://cpp-experiment.sourceforge.net/promote-20050917/libs/type_traits/tes… I used to compile tests on VC6 and I'm pretty sure I can add workarounds if someone is still interested. Actually, it compiled the tests better then VC7. As for Borland 5.5, is_enum is broken and I don't see any reason to support this compiler. -- Alexander

1 0

Boost regression notification (2005-09-17 [HEAD])
by Douglas Gregor 17 Sep '05

17 Sep '05

Boost regression test failures ------------------------------ Report time: 2005-09-16T05:00:20Z 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. typeof Detailed report: http://engineering.meta-comm.com/boost-regression/CVS-HEAD/developer/issues… 259 failures in 17 libraries: algorithm/string (1) concept_check (14) date_time (5) filesystem (8) foreach (7) graph (4) iostreams (1) math (6) mpl (2) parameter (17) python (1) regex (36) serialization (40) spirit (2) thread (24) typeof (87) wave (4) |algorithm/string| regex: gcc-3_3-darwin |concept_check| stl_concept_covering: 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-win32-9_0 intel-win32-9_0 mingw-3_4_2 msvc vc-7_1 vc-7_1 |date_time| testlocal_time_iterator: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux msvc testlocal_time_period: gcc-2.95.3-linux msvc |filesystem| convenience_test: msvc default_name_check_test: msvc fstream_test: msvc large_file_support_test: msvc operations_test: msvc operations_test_dll: msvc path_test: msvc path_test_dll: msvc |foreach| user_defined: cw-8_3 cw-9_4 cw-9_5-darwin msvc vc-6_5 vc-6_5-stlport vc-7_0 |graph| graphviz_test: vc-7_1 vc-7_1 vc-7_1 layout_test: intel-win32-9_0 |iostreams| regex_filter_test: gcc-3_3-darwin |math| octonion_test: gcc-4_0-darwin gcc-4_0-darwin quaternion_test: gcc-4_0-darwin gcc-4_0-darwin special_functions_test: gcc-4_0-darwin gcc-4_0-darwin |mpl| size_t: gcc-4_0-darwin gcc-4_0-darwin |parameter| basics: borland-5_6_4 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 msvc macros: borland-5_6_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux sfinae: borland-5_6_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux msvc unnamed: borland-5_6_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux vc-7_1 |python| data_members: msvc |regex| bad_expression_test: gcc-3_3-darwin captures_example: gcc-3_3-darwin captures_test: gcc-3_3-darwin collate_info: gcc-3_3-darwin concept_check: gcc-3_3-darwin credit_card_example: gcc-3_3-darwin grep: gcc-3_3-darwin icu_example: gcc-3_3-darwin mfc_example: gcc-3_3-darwin object_cache_test: gcc-3_3-darwin partial_regex_grep: gcc-3_3-darwin partial_regex_match: gcc-3_3-darwin posix_api_check: gcc-3_3-darwin posix_api_check_cpp: gcc-3_3-darwin recursion_test: gcc-3_3-darwin regex_config_info: gcc-3_3-darwin regex_dll_config_info: gcc-3_3-darwin regex_grep_example_1: gcc-3_3-darwin regex_grep_example_2: gcc-3_3-darwin regex_grep_example_3: gcc-3_3-darwin regex_grep_example_4: gcc-3_3-darwin regex_iterator_example: gcc-3_3-darwin regex_match_example: gcc-3_3-darwin regex_merge_example: gcc-3_3-darwin regex_regress: gcc-3_3-darwin regex_regress_dll: gcc-3_3-darwin regex_replace_example: gcc-3_3-darwin regex_search_example: gcc-3_3-darwin regex_split_example_1: gcc-3_3-darwin regex_split_example_2: gcc-3_3-darwin regex_timer: gcc-3_3-darwin regex_token_iterator_eg_1: gcc-3_3-darwin regex_token_iterator_eg_2: gcc-3_3-darwin static_mutex_test: gcc-3_3-darwin msvc wide_posix_api_check_cpp: gcc-3_3-darwin |serialization| test_class_info_load_binary_archive: cw-9_5-darwin gcc-3_3-darwin gcc-3_4_3-sunos gcc-4_0-darwin test_class_info_load_binary_archive_dll: cw-9_5-darwin 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: cw-9_5-darwin gcc-3_3-darwin gcc-3_4_3-sunos gcc-4_0-darwin test_class_info_load_xml_archive_dll: cw-9_5-darwin 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 test_const_save_fail1: msvc test_const_save_fail2: msvc test_const_save_fail3: msvc test_map_binary_archive_dll: msvc test_map_text_archive_dll: msvc test_map_text_warchive_dll: msvc |spirit| traverse_tests: intel-win32-9_0 traverse_tests_debug: intel-win32-9_0 |thread| test_barrier: msvc test_barrier_lib: intel-9.0-linux msvc test_condition: msvc test_condition_lib: intel-9.0-linux msvc test_mutex: msvc test_mutex_lib: intel-9.0-linux msvc test_once: msvc test_once_lib: intel-9.0-linux msvc test_read_write_mutex: msvc test_read_write_mutex_lib: intel-9.0-linux msvc test_thread: msvc test_thread_lib: intel-9.0-linux msvc test_tss: msvc test_tss_lib: intel-9.0-linux msvc test_xtime: msvc test_xtime_lib: intel-9.0-linux msvc |typeof| data_member_emulation: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux data_member_native: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux intel-win32-9_0 intel-win32-9_0 function_emulation: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux function_native: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux intel-win32-9_0 intel-win32-9_0 msvc function_ptr_emulation: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux function_ptr_native: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux intel-win32-9_0 intel-win32-9_0 function_ref_emulation: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux function_ref_native: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux intel-win32-9_0 intel-win32-9_0 lvalue_emulation: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux lvalue_native: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux intel-win32-9_0 intel-win32-9_0 msvc member_function_emulation: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux member_function_native: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux intel-win32-9_0 intel-win32-9_0 modifiers_emulation: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux modifiers_native: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux intel-win32-9_0 intel-win32-9_0 template_int_emulation: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux template_int_native: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux intel-win32-9_0 intel-win32-9_0 template_tpl_emulation: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux template_tpl_native: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux intel-win32-9_0 intel-win32-9_0 msvc template_type_emulation: cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux template_type_native: gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux intel-win32-9_0 intel-win32-9_0 type_emulation: borland-5_6_4 cw-8_3 cw-9_4 cw-9_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux type_native: borland-5_6_4 gcc-2.95.3-linux gcc-2.95.3-stlport-4.6.2-linux intel-win32-8_1 intel-win32-9_0 intel-win32-9_0 intel-win32-9_0 |wave| test_re2c_lexer: intel-9.0-linux test_slex_lexer: intel-9.0-linux testwave: gcc-3.3.6-linux intel-9.0-linux

1 0

[shmem] New snapshot available in boost vault
by Ion Gaztañaga 17 Sep '05

17 Sep '05

Hi to all, I've just uploaded a new Shmem snapshot to Boost Vault under "Memory" folder. This version includes the following changes: -> Changed some containers' interface according to closed C++ defect reports. -> Optimized node containers so that they store just one allocator instance, which reduces container size and containers constructors performance. -> Added slist container (singly linked list). Changes from SGI implementation: end node is an independent node not embedded and splice_after members take an additional parameter to mimick std::list::splice function. Added support for unequal allocators. -> Added growing capacity to memory management algorithms. This way, Shmem machinery based on memory-mapped files and heap memory can grow when the memory segment has no space for new objects. -> Eliminated basic_raw_xxx classes. basic_named_xxx classes offer the same functionality with just 16 bytes overhead per segment and zero runtime performance. This will help library review. -> Code cleanup and reorganized some files in subdirectories to help maintenance (sorry troubles with broken includes). On-line documentation is as always available here: http://ice.prohosting.com/newfunk/boost/libs/shmem/doc/html/index.html Regards, Ion

1 0

a possible typeof addition
by Arkadiy Vertleyb 17 Sep '05

17 Sep '05

Hi All, Do you think it makes sense to write a utility that, using a syntax like following: template<class T, class U> class foo /*typeof*/ { . . . }; struct bar /*typeof*/ { . . . }; // etc. would generate the typeof registrations? I think it could be quite helpful to those library authors who want to make their libs typeof-enabled, since it would minimise the duplication issue... This utility could be written using Spirit or maybe Python or any other suitable tool. Please let me know. Regards, Arkadiy

4 4

Re: [boost] Constructible numbers? (was: Re: Interest in an arbitrary precision library?)
by Guillaume Melquiond 17 Sep '05

17 Sep '05

Le mercredi 14 septembre 2005 à 02:12 -0400, Daryle Walker a écrit : > On 9/13/05 8:17 AM, "Guillaume Melquiond" wrote: > > [SNIP] > > [1] Rational numbers are constructible. Irrational numbers are > > constructible. Pi, E, and other common mathematical constants are > > constructible. Numbers derived from them are constructible. Omega (the > > halting problem encoding) is not constructible. > > I couldn't find this mathematical definition of "constructible;" is it known > by another term? (The only definition I know of is for those ancient Greek > compass & [unmarked] straight-edge puzzles. But all the associated numbers > for those are a subset of algebraic numbers. By that definition, pi and e > are not constructible, since they're transcendental.) I looked in the > Wikipedia, BTW. But maybe you mistyped; rational and irrational numbers > cover _every_ real number, so you didn't have to specify pi, e, common > constants, or derived values. Sorry, "algebraic" is missing in my sentence; I wanted to express a progression in the complexity of the numbers. As for what I called constructible reals, you can look at the "computable numbers" page in the Wikipedia. I should have checked beforehand that the word I use in French was the one used in English :-) Anyway, my point was: "by definition", computable numbers are the ones a computer can handle in arbitrary precision (emphasis on arbitrary), and they cover a wider range than just rational numbers. Best regards, Guillaume

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Beyond the C++ Standard Library: An Introduction to Boost
by Bjorn.Karlsson＠readsoft.com 17 Sep '05

17 Sep '05

Dear All, A long time ago, I came here--to the Boost developers and Boost users mailing lists--asking for help with reviewing a book about the Boost libraries. Your response was fantastic. Back then, I concluded my email with saying thanks to all Boosters; for the libraries, the ideas, the research, the discussions, and the enthusiasm. Today, when the book is finally shipping, I'd like to extend that thank you to the Boosters who helped make "Beyond the C++ Standard Library" reality. Beman Dawes, Rob Stewart, David Abrahams, Aleksey Gurtovoy, David Brownell, Douglas Gregor, Duane Murphy, Eric Friedman, Eric Niebler, Fernando Cacciola, Frank Griswold, Jaakko Järvi, James Curran, Jeremy Siek, John Maddock, Kevlin Henney, Michiel Salters, Paul Grenyer, Peter Dimov, Phil Boyd, Ronald Garcia, Thorsten Ottosen, Tommy Svensson, and Vladimir Prus; thank you all so much! I sincerely hope that I am giving something back to the amazing Boost community through this book. Best regards, Björn Karlsson

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