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[spirit] range_p and signedness of char
by Pedro Lamarão 26 Jun '05

26 Jun '05

The following test program doesn't work like I would expect. #include <iostream> #include <string> #include <boost/spirit/core.hpp> int main () { using namespace std; using namespace boost::spirit; typedef rule<scanner<string::iterator> > rule_t; string s; s += char(0x81); cout << (char(0x80) < char(0xFF)) << endl; rule_t test = range_p(0x80, 0xFF); // (*) parse_info<string::iterator> info = parse(s.begin(), s.end(), test); if (info.hit) cout << "Hit!" << endl; else cout << "Not hit." << endl; return 0; } This is the program output. [pedro@localhost http_client]$ $HOME/.local/gcc-3.4.4/bin/g++ -g -I ../../../.. -Wall -Wextra test.cpp -fsigned-char && ./a.out 1 Not hit. [pedro@localhost http_client]$ $HOME/.local/gcc-3.4.4/bin/g++ -g -I ../../../.. -Wall -Wextra test.cpp -funsigned-char && ./a.out 1 Hit! [pedro@localhost http_client]$ $HOME/.local/gcc-3.4.4/bin/gcc -v Reading specs from /home/pedro/.local/gcc-3.4.4/lib/gcc/i686-pc-linux-gnu/3.4.4/specs Configured with: ../configure --prefix=/home/pedro/.local/gcc-3.4.4 --enable-languages=c,c++ Thread model: posix gcc version 3.4.4 -- Pedro Lamarão

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[conversion] Borland cast_test failure
by AlisdairM 26 Jun '05

26 Jun '05

The reason for the failure is simple - Borland compiler cannot handle default template parameters for nested templates. I could not find a quick workaround, so suggest marking this test as 'expected fail' unless there is some codefrom an older version for it to fall back on. -- AlisdairM

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Pre-Built library size for all targets
by Brian Braatz 25 Jun '05

25 Jun '05

Does anyone have a good sense of what it would take to "store" all the prebuilt libs from all the targets? I am wondering about this, because I am wondering what it would take in disk space to put up a web server will all the boost libs prebuilt on it?

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Re: [boost] [serialization] a proposal for an alternative to the new const-saving rule
by JOAQUIN LOPEZ MU?Z 25 Jun '05

25 Jun '05

Hi Dave, ----- Mensaje original ----- De: David Abrahams <dave(a)boost-consulting.com> Fecha: Sábado, Junio 25, 2005 2:09 pm Asunto: Re: [boost] [serialization] a proposal for an alternative tothenewconst-saving rule > "JOAQUIN LOPEZ MU?Z" <joaquin(a)tid.es> writes: > > > David Abrahams <dave(a)boost-consulting.com> wrote: > > to thenewconst-saving rule > > > >> "JOAQUIN LOPEZ MU?Z" <joaquin(a)tid.es> writes: > >> > >> > De: David Abrahams <dave(a)boost-consulting.com> > >> > >> I'm not sure it is. There's an imposition on users: all the types > >> they want to serialize have to support hashing. > > > > No, no. Please check the piece of pseudocode on my first > > message: the hash code is automatically built by > > Boost.Serialization, without any intervention from the user, > > I understand that. > > > and certainly without any requirement that the type be hashable > > (in the sense of providing a hash_value overload or something > > like this.) > > I was talking about the type's sub-objects. > > > Let me illustrate with an example: > > <snip> > > I actually did understand that, as you can see from... > > > The process recursively goes down to primitive types, > > as specified in my proposed pseudocode, and only these > > have to be hashable, but fortunately they are. > > > >> > >> It is nice that the serialization library automatically takes > care of > >> hashing aggregated types and leaving out the unserialized > data... > > ...this remark, and the remarks at the end of my message, which you > snipped. OK, excuse my verbosity, but now I'm satisfied that we both agree on the terms the algorithm is laid out. > > >> uh, wait: this will never work unless you plan only to do shallow > >> hashing. Otherwise you will get an exponential explosion for some > >> object graphs. Is that your intention? > > > > I'm not getting you. The hash value is calculated as part of the > > saving process itself, so it has the very same complexity. > > I've got the hunch you might be meaning something else, > > could you please elaborate? > > The question is, when encountering a pointer or reference member that > needs to be hashed, do you do what the serialization process does and > hash the thing that it refers to, or do you just hash its address? > The former is deep hashing; the latter is shallow hashing. In a graph > with tracking, you serialize an object X once, and all subsequent > times you encounter X in the graph you just serialize an id. If you > add hashing, the first time you encounter X you'll hash it and > serialize it. For this one time it doesn't matter if hashing is deep > or shallow from a big-O perspective. However, when you encounter X > again, if hashing is deep, you'll do a lot of extra work. > Actually, a > potentially infinite amount if there are cycles, so hashing really > does have to be shallow. I guess I answered my own question. > I guess so. Correct, pointer hashing has to be shallow. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo

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Boost regression notification (2005-06-25)
by Douglas Gregor 25 Jun '05

25 Jun '05

Boost regression test failures ------------------------------ Report time: 2005-06-25T16:03:33Z 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. numeric/ublas random io conversion variant Detailed report: http://engineering.meta-comm.com/boost-regression/CVS-HEAD/developer/issues… 901 failures in 22 libraries: assign (1) config (1) conversion (7) date_time (18) graph (1) io (1) iterator (3) mpl (45) multi_index (20) numeric/conversion (5) numeric/ublas (6) program_options (8) ptr_container (7) python (4) random (2) regex (3) serialization (728) spirit (9) test (7) thread (8) variant (12) wave (5) |assign| multi_index_container: vc-8_0 |config| config_link_test: gcc-3_3-darwin |conversion| cast_test: cw-9_5-darwin gcc-3.2.3-linux gcc-3.3.6-linux gcc-3.4.4-linux gcc-4.0.0-linux intel-8.1-linux vc-8_0 |date_time| testdate_dll: gcc-3_3-darwin testdate_duration_dll: gcc-3_3-darwin testdate_input_facet_dll: gcc-3_3-darwin testdate_iterator_dll: gcc-3_3-darwin testfacet_dll: gcc-3_3-darwin testformatters_dll: gcc-3_3-darwin testgenerators_dll: gcc-3_3-darwin testgreg_cal_dll: gcc-3_3-darwin testgreg_day_dll: gcc-3_3-darwin testgreg_month_dll: gcc-3_3-darwin testgreg_serialize: vc-8_0 testgreg_serialize_xml: vc-8_0 testgreg_year_dll: gcc-3_3-darwin testperiod_dll: gcc-3_3-darwin testtime_serialize: vc-8_0 testtime_serialize_std_config: vc-8_0 testtime_serialize_xml: vc-8_0 testtime_serialize_xml_std_config: vc-8_0 |graph| dag_longest_paths: intel-win32-8_1 |io| ios_state_unit_test: intel-win32-8_1 |iterator| filter_iterator_test: vc-8_0 iterator_archetype_cc: vc-8_0 reverse_iterator_test: vc-8_0 |mpl| advance: vc-8_0 apply: vc-8_0 arithmetic: vc-8_0 at: vc-8_0 back: vc-8_0 bitwise: vc-8_0 comparison: vc-8_0 copy: vc-8_0 copy_if: vc-8_0 count_if: vc-8_0 distance: vc-8_0 filter_view: vc-8_0 fold: vc-8_0 for_each: vc-8_0 front: vc-8_0 insert: vc-8_0 insert_range: vc-8_0 is_sequence: vc-8_0 iterator_tags: vc-8_0 joint_view: vc-8_0 lambda: vc-8_0 lower_bound: vc-8_0 map: vc-8_0 max_element: vc-8_0 min_max: vc-8_0 numeric_ops: vc-8_0 pair_view: vc-8_0 partition: vc-8_0 range_c: vc-8_0 remove: vc-8_0 remove_if: vc-8_0 replace: vc-8_0 replace_if: vc-8_0 reverse: vc-8_0 set: vc-8_0 set_c: vc-8_0 single_view: vc-8_0 sort: vc-8_0 stable_partition: vc-8_0 transform: vc-8_0 transform_view: vc-8_0 unpack_args: vc-8_0 upper_bound: vc-8_0 vector: vc-8_0 zip_view: vc-8_0 |multi_index| test_basic: vc-8_0 test_capacity: vc-8_0 test_comparison: vc-8_0 test_composite_key: vc-8_0 test_conv_iterators: vc-8_0 test_copy_assignment: vc-8_0 test_hash_ops: vc-8_0 test_iterators: vc-8_0 test_list_ops: vc-8_0 test_modifiers: vc-8_0 test_mpl_ops: vc-8_0 test_observers: vc-8_0 test_projection: vc-8_0 test_range: vc-8_0 test_safe_mode: vc-8_0 test_serialization: vc-8_0 test_set_ops: vc-8_0 test_special_list_ops: vc-8_0 test_special_set_ops: vc-8_0 test_update: vc-8_0 |numeric/conversion| converter_test: vc-8_0 numeric_cast_test: vc-8_0 traits_test: vc-8_0 udt_example_0: vc-8_0 udt_support_test: vc-8_0 |numeric/ublas| concepts: vc-8_0 test2: vc-8_0 test3: vc-8_0 test4: vc-8_0 test5: vc-8_0 test6: vc-8_0 |program_options| cmdline_test_dll: gcc-3_3-darwin options_description_test_dll: gcc-3_3-darwin parsers_test_dll: gcc-3_3-darwin positional_options_test_dll: gcc-3_3-darwin unicode_test_dll: cw-9_5-darwin gcc-3_3-darwin variable_map_test_dll: gcc-3_3-darwin winmain_dll: gcc-3_3-darwin |ptr_container| ptr_map: cw-9_5-darwin gcc-3.2.3-linux gcc-3.3.6-linux gcc-3.4.4-linux gcc-4.0.0-linux intel-8.1-linux vc-8_0 |python| bases: vc-8_0 embedding: vc-8_0 select_arg_to_python_test: vc-8_0 select_holder: vc-8_0 |random| random_test: intel-win32-8_1 intel-win32-8_1 |regex| captures_example: vc-8_0 regex_regress_dll: gcc-3_3-darwin static_mutex_test: gcc-3_3-darwin |serialization| test_array_binary_archive: vc-8_0 test_array_binary_archive_dll: gcc-3_3-darwin vc-8_0 test_array_text_archive: vc-8_0 test_array_text_archive_dll: cw-9_5-darwin gcc-3_3-darwin vc-8_0 test_array_text_warchive_dll: cw-9_5-darwin gcc-3_3-darwin vc-8_0 test_array_xml_archive: vc-8_0 test_array_xml_archive_dll: cw-9_5-darwin gcc-3_3-darwin vc-8_0 test_array_xml_warchive_dll: cw-9_5-darwin gcc-3_3-darwin vc-8_0 test_binary_binary_archive: vc-8_0 test_binary_binary_archive_dll: gcc-3_3-darwin vc-8_0 test_binary_text_archive: vc-8_0 test_binary_text_archive_dll: cw-9_5-darwin gcc-3_3-darwin vc-8_0 test_binary_text_warchive_dll: cw-9_5-darwin gcc-3_3-darwin vc-8_0 test_binary_xml_archive: vc-8_0 test_binary_xml_archive_dll: cw-9_5-darwin gcc-3_3-darwin vc-8_0 test_binary_xml_warchive_dll: cw-9_5-darwin gcc-3_3-darwin vc-8_0 test_class_info_load_binary_archive: vc-8_0 test_class_info_load_binary_archive_dll: gcc-3_3-darwin vc-8_0 test_class_info_load_text_archive: cw-9_5-darwin gcc-3_3-darwin vc-8_0 test_class_info_load_text_archive_dll: cw-9_5-darwin gcc-3_3-darwin vc-8_0 test_class_info_load_text_warchive: cw-9_5-darwin gcc-3_3-darwin test_class_info_load_text_warchive_dll: cw-9_5-darwin gcc-3_3-darwin vc-8_0 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variant_test1: vc-8_0 variant_test2: vc-8_0 variant_test3: vc-8_0 variant_test4: vc-8_0 variant_test5: vc-8_0 variant_test6: vc-8_0 variant_test7: vc-8_0 variant_test8: vc-8_0 variant_visit_test: vc-8_0 |wave| test_re2c_lexer: cw-9_4 test_slex_lexer: cw-9_4 testwave: cw-9_4 cw-9_5-darwin gcc-3.2.3-linux

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Re: [boost] [install] The Windows GUI setup (for tools)
by Brian Braatz 25 Jun '05

25 Jun '05

> On Behalf Of Rene Rivera > > Once upon a time I needed to use Boost.Book and Quickbook so I went > through the various steps required to acquire and install enough of the > files to get that working on Windows. I vowed to put my efforts into an > installer so that others would not go through the same pain. So I made a > quick installer with my favorite install maker InnoSetup. Which I've > periodically updated, but haven't widely published it's location. I've > now made it more accessible as a release in the Boost-Sandbox project > (and because the vault has size limits): > > http://sourceforge.net/project/shownotes.php?release_id=337287 > [Brian Braatz Writes:] Thank you for sharing that (!!!!). (downloading now). I still cant build wave (haven't had the time to troubleshoot), and appreciate the pre-built library :) Do you have any future plans for this component? Thanks again, Brian

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Re: [boost] [serialization] a proposal for an alternative to the new c
by JOAQUIN LOPEZ MU?Z 25 Jun '05

25 Jun '05

Hello Dave, ----- Mensaje original ----- De: brangdon(a)cix.compulink.co.uk (Dave Harris) Fecha: Sábado, Junio 25, 2005 2:37 am Asunto: Re: [boost] [serialization] a proposal for an alternative to the new c > In-Reply-To: <42BBC406.1A3FB240(a)tid.es> > joaquin(a)tid.es (=?iso-8859- > 1?Q?Joaqu=EDn=20M=AA=20L=F3pez=20Mu=F1oz?=) > wrote (abridged): > > The hardest part is checking for equality. My proposal is > > to follow a hash-based approach, which is effective both in > > terms of complexity and space (one word per tracked object.), > > and does not impose any special requirement on the serialized > > objects (for instance, an approach based on operator== would > > require that objects be equalitycomparable). > > [...] > > if(hash_addr!=0){ > > boost::hash_combine(*hash_addr,x); > > } > > Why do we need the test against 0? Is it supposed to improve > performance? > Hashing ought to be cheap - it is just bit-twiddling on primitives > - and > conditional branches are relatively expensive. It may be quicker > to always > hash. Well, the proposed pseudocode is only meant to illustrate the idea, certainly it could prove faster to hash unconditionally. > > It might be worth using #ifndef _NDEBUG or similar, though. > Yes. As this is merely a protection against incorrect user code, one should be able to turn it on/off or at least have it only in debug mode, much in the same way as the safety checks done by some STL implementations. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo

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[any] More conversion flexibility?
by Falcon 25 Jun '05

25 Jun '05

There are two things I need for a project I'm currently doing. I'm curious if anyone thinks this could be added to the package boost.any, either in the class boost::any or as a separate class, as well as whether it would be of use to anyone else. :) 1. Implicit conversions to/from pointers and references. 2. Support for user-defined conversion hooks when using any_cast. These would be defined in terms of the contained type, not the converted-to type. Both are possible (I've already done it), but will have a runtime performance impact: * Two additional [inline] function calls and two comparisons per conversion, even if the types are the same. * Additional memory overhead to store information about the type (about sizeof(pointer)*6 per instance of boost::any). * Storage of user-defined conversions (in function pointers or function objects). Comments appreciated, Peregrine Falcon

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[date_time]Streaming bugs
by Martin 25 Jun '05

25 Jun '05

1. The date_time library in the currenct CVS doesn't follow the standard formatted input/output requirements in the C++ standard. e.g. stringstream s("205-Jan-01"); date d; s >> d; will throw "Year out of valid range" exception instead of just setting the badbit. The resolution is to use the sentry object and catch exceptions: template <class charT, class traits> inline std::basic_istream<charT, traits>& operator>>(std::basic_istream<charT, traits>& is, date& d) { std::basic_istream<charT, traits>::sentry cerberos(is, false); if (cerberos) { std::ios_base::iostate status = std::ios_base::iostate (std::ios_base::goodbit); try { ... //use facet and set status if failed } catch (...) { is.setstate(std::ios_base::badbit); } if (status) is.setstate(status); } return is } --------------- 2. The default date format is "%Y-%b-%d" which is very confusing since it is using a date order that is not common in english speaking countries while it uses english month names. The default format should be "%x". (I know this will create problems with input parsing on some STL libraries but I think it is a better than the current solution where almost nobody can use the default). --------------- 3. The streaming functions all add a new facet to the locale if no current facet has been imbued. Wouldn't it be better to either have a singleton "default" facet for all streams or imbue the facet to the global locale instead?

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Re: [boost] [mpl][tru64cxx] set failing
by JOAQUIN LOPEZ MU?Z 25 Jun '05

25 Jun '05

Hi Dave ----- Mensaje original ----- De: David Abrahams <dave(a)boost-consulting.com> Fecha: Sábado, Junio 18, 2005 9:58 pm Asunto: Re: [boost] [mpl][tru64cxx] set failing > "JOAQUIN LOPEZ MU?Z" <joaquin(a)tid.es> writes: > > > mpl::set is currently failing > > > > http://tinyurl.com/9qzuh > > Because the component is broken and I checked in a testcase that shows > it to be broken. > I don't think this has to do with your newly checked testcase: the problem also shows outside MPL test suite: http://tinyurl.com/8vdtj Besides, last COMSOFT regression cycle is older than your commit. Joaquín M López Muñoz Telefíonica, Investigación y Desarrolo

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