May 2007 - Boost - lists.preview.boost.org

What happened to the typeid/type_info proposal?
by Johan Torp 26 May '07

26 May '07

I have seen several discussions regarding adding a small typeid/type_info library similar to the one introduced by Alexandrescu in Modern C++ Design. Has there been any progress on this issue? see: http://lists.boost.org/Archives/boost/2005/02/80969.php Best Regards, Johan Torp

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[proto] macro for wrapping expressions
by Maurizio Vitale 26 May '07

26 May '07

What about introducing a macro: #define BOOST_PROTO_WRAP(DOMAIN,EXPRESSION) \ namespace boost { namespace proto { \ template<typename E> \ struct generate<DOMAIN, E> { \ typedef EXPRESSION<E> type; \ static type make (E const& expr) { \ return type (expr); \ } \ }; \ } } as far as I can tell one does never need something different from the above boilerplate code. (otherwise I'd like to see examples, for my own education) Not a big deal, I know, but looks nicer (and sound nicer in the docs as well, I think). Have fun in Colorado! Maurizio

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[boost:proto] adding new tags
by Maurizio Vitale 25 May '07

25 May '07

Suppose I needed a new tag for representing some high-level concept that I do not want to express in terms of C++ operators [it could be a get_bit(N) operation that has very different implementation when for my numbers the unserlyining implementation is a builtin type or a GMP big int] Here's my code for adding a binary operator my_plus: struct my_plus {}; template<typename Left, typename Right> proto::expr<my_plus, proto::args2<proto::ref_<Left>, proto::ref_<Right> > > const make_my_plus_expr(Left& left, Right& right) { typedef proto::expr<my_plus, proto::args2<proto::ref_<Left>, proto::ref_<Right> > > expr_type; expr_type that={left,right}; return proto::generate<typename Left::domain, expr_type>::make (that); } Questions: - is the above the right way, or is there some friendlier interface? - if I wanted to support the case where left and/or right are not proto expressions, it would be enough to call generate<>::make on the non proto-ized one(s) to turn them into proto::terminal, right? Maybe proto could provide a mechanism for doing this, seems common enough [might be enough to raise as_expr_if2 from proto::detail]. But clearly then people like me will ask for N up to BOOST_PROTO_MAX_ARITY. Maybe a separate CPP constant could be used to keep the number of permutations low. Or deal separately with >2 args with an mpl (or fusion) sequence. Pretty please... [btw, if I understand the code in operators.hpp, proto doesn't explicitely check that the domains of the two operands are the same. This situation doesn't seem really supported, nor desirable, and maybe code doing it wouldn't compile anyhow. But in case it did compile and do wrong things you might consider slowing down compilation and adding a check] - is it correct that all I have to do then is to either: - make my_plus disappear before evaluation (via transforms), or - provide an evaluation context with the appropriate overload for operator()(my_plus, ...). For instance the following would give to my_plus the normal meaning of '+': template<typename Left, typename Right> double operator() (my_plus, const Left& left, const Right& right) const{ return proto::eval(left, *this) + proto::eval (right, *this); } - a simple example for this would be very nice for the documentation. Best regards, Maurizio

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[sandbox] template processor for generating sandbox projects
by Stjepan Rajko 25 May '07

25 May '07

Hello, Under guidance from Rene Rivera, I've put together a template processor which can be used to create seed projects for the boost sandbox (with the appropriate directory structure and build files). The docs are at: http://dancinghacker.com/code/template/ The latest changes are in the sandbox. Please note that the actual template needs to be checked for Boost guidelines compliance. I think Rene was planning on doing that. I hope this is helpful! As always, any suggestions welcome. Stjepan

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thread encapsulation with private attributes
by Nicolas Emiliani 25 May '07

25 May '07

Hi, I was thinking about using boost as much as I could on a proyect. The idea of using the pthread encapsulation ocurred to me. But I found that the interface was pretty poor. I guess it is like that cause of portability. So I thought, ok... I can inherit from it and encapsulate the pthread (thats my case) functioanlity I want. But to my surprise the pthread_t variable called m_thread was declared PRIVATE... why is that?!... I mean... why wouldn't u want somedy to inherit and extend the functionality to the user's will? thanks for clarifying my doubt. Nicolas-

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Boost inspection notification (2007-05-25/RC_1_34_0) *LC*
by Rene Rivera 25 May '07

25 May '07

Boost Inspection Report Run Date: 16:05:43 UTC, Friday 25 May 2007 An inspection program <http://www.boost.org/tools/inspect/index.html> checks each file in the current Boost CVS for various problems, generating this as output. Problems detected include tabs in files, missing copyrights, broken URL's, and similar misdemeanors. Totals: 11453 files scanned 909 directories scanned (including root) 1059 problems reported Problem counts: 661 files missing Boost license info or having wrong reference text 398 files missing copyright notice Summary: any (1) archive (1) build (68) concept_check (22) conversion (5) doc (1) filesystem (2) function (1) graph (1) inspect (1) integer (9) lambda (10) libs (6) logic (2) math (1) more (13) mpl (417) multi_array (13) numeric (188) optional (1) people (4) program_options (35) property_map (15) ptr_container (8) python (14) rational (5) regex (4) regression (118) release (2) serialization (16) signals (2) smart_ptr (8) test (3) timer (1) tr1 (2) tuple (5) utility (12) variant (42) Details: *L* missing Boost license info, or wrong reference text *C* missing copyright notice |any| libs/any/doc/ any.xml: *L* |archive| boost/archive/detail/ utf8_codecvt_facet.hpp: *L* |build| tools/build/v2/build/ build-request.jam: *L* modifiers.jam: *L* tools/build/v2/doc/ Jamfile.v2: *C* *L* 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1 0

Boost inspection notification (2007-05-25/RC_1_34_0) *X*
by Rene Rivera 25 May '07

25 May '07

Boost Inspection Report Run Date: 16:05:36 UTC, Friday 25 May 2007 An inspection program <http://www.boost.org/tools/inspect/index.html> checks each file in the current Boost CVS for various problems, generating this as output. Problems detected include tabs in files, missing copyrights, broken URL's, and similar misdemeanors. Totals: 11453 files scanned 909 directories scanned (including root) 192 problems reported Problem counts: 0 files with invalid line endings 0 bookmarks with invalid characters 3 invalid urls 101 broken links 21 unlinked files 22 file/directory names issues 1 files with tabs 9 violations of the Boost min/max guidelines 35 usages of unnamed namespaces in headers (including .ipp files) Summary: archive (3) bind (1) boost-root (1) build (1) date_time (1) doc (2) filesystem (33) graph (2) iostreams (2) lambda (3) math (8) more (4) mpl (4) multi_array (2) ptr_container (1) python (8) regex (1) regression (32) serialization (1) test (81) type_traits (1) Details: *R* invalid (cr only) line-ending *A* invalid bookmarks, invalid urls, broken links, unlinked files *N* file/directory names issues *T* tabs in file *M* uses of min or max that have not been protected from the min/max macros, or unallowed #undef-s *U* unnamed namespace in header |archive| boost/archive/basic_streambuf_locale_saver.hpp: *N* name exceeds 31 characters boost/archive/impl/xml_wiarchive_impl.ipp: *U* unnamed namespace at line 53 boost/archive/iterators/remove_whitespace.hpp: *U* unnamed namespace at line 57 |bind| boost/bind/placeholders.hpp: *U* unnamed namespace at line 25 |boost-root| index.htm: *A* broken link: doc/hmtl/date_time/details.html#changes |build| tools/build/v2/test/test_system.html: *A* unlinked file |date_time| libs/date_time/xmldoc/date_time_docs_howto.html: *A* unlinked file |doc| doc/html/boost_math/inverse_complex.html: *A* unlinked file doc/html/jam.html: *A* unlinked file |filesystem| libs/filesystem/doc/do-list.htm: *A* invalid URL (hardwired file): file://?/ *A* invalid URL (hardwired file): file://?/UNC/ libs/filesystem/doc/i18n.html: *A* broken link: convenience.htm#basic_recursive_directory_iterator *A* broken link: exception.htm *A* broken link: operations.htm *A* broken link: operations.htm#Do-the-right-thing *A* broken link: operations.htm#is_directory *A* broken link: operations.htm#is_file *A* broken link: operations.htm#status libs/filesystem/doc/index.htm: *A* broken link: ../build/Jamfile *A* broken link: convenience.htm *A* broken link: operations.htm#create_directory *A* broken link: operations.htm#create_hard_link *A* broken link: operations.htm#current_path *A* broken link: operations.htm#equivalent *A* broken link: operations.htm#file_size *A* broken link: operations.htm#initial_path *A* broken link: operations.htm#is_file *A* broken link: operations.htm#is_symlink *A* broken link: operations.htm#status *A* broken link: operations.htm#symlink_status *A* broken link: path.htm#Canonical *A* broken link: path.htm#Normalized *A* broken link: path.htm#default_name_check *A* broken link: path.htm#name_check_mechanism *A* broken link: path.htm#normalize *A* broken link: path.htm#operator_eq libs/filesystem/doc/portability_guide.htm: *A* broken link: path.htm#name_check_typedef libs/filesystem/doc/tr2_proposal.html: *A* invalid URL (hardwired file): file:///C|/boost/site/libs/filesystem/doc/operations.htm#complete_note |graph| libs/graph/example/file_dependencies.cpp: *M* violation of Boost min/max guidelines on line 139 libs/graph/test/serialize.cpp: *T* |iostreams| libs/iostreams/doc/concepts/multi-character.html: *A* unlinked file libs/iostreams/doc/installation.html: *A* broken link: ../../../tools/build/v1/build_system.htm |lambda| boost/lambda/core.hpp: *U* unnamed namespace at line 62 boost/lambda/detail/lambda_functors.hpp: *U* unnamed namespace at line 25 boost/lambda/exceptions.hpp: *U* unnamed namespace at line 24 |math| libs/math/test/common_factor_test.cpp: *M* violation of Boost min/max guidelines on line 146 *M* violation of Boost min/max guidelines on line 147 *M* violation of Boost min/max guidelines on line 193 *M* violation of Boost min/max guidelines on line 194 |more| more/cvs.html: *A* unlinked file more/getting_started/unix-variants.html: *A* broken link: ../../doc/html/thread/build.html#thread.build more/getting_started/windows.html: *A* broken link: ../../doc/html/thread/build.html#thread.build more/separate_compilation.html: *A* broken link: ../libs/config/test/link/test/Jamfile.v2 |mpl| boost/mpl/alias.hpp: *U* unnamed namespace at line 17 libs/mpl/doc/refmanual/for-each.html: *A* broken link: ./value-initialized.html |multi_array| boost/multi_array/base.hpp: *U* unnamed namespace at line 69 libs/multi_array/test/generative_tests.hpp: *U* unnamed namespace at line 57 |ptr_container| libs/ptr_container/doc/tutorial_example.html: *A* unlinked file |python| libs/python/doc/building.html: *A* broken link: ../index.htm libs/python/doc/tutorial/doc/html/python/hello.html: *A* broken link: ../../../../../example/tutorial/Jamrules libs/python/doc/tutorial/index.html: *A* broken link: ../../../LICENSE_1_0.txt libs/python/doc/v2/May2002.html: *A* broken link: ../../../../tools/build/v1/build_system.htm *A* broken link: ../../../../tools/build/v1/gen_aix_import_file.py libs/python/doc/v2/faq.html: *A* broken link: ../../../../tools/build/v1/build_system.htm |regex| libs/regex/performance/input.html: *A* unlinked file |regression| regression/.htaccess: *N* leading character of ".htaccess" is not alphabetic tools/regression/test/test-cases/incremental/bjam.log.1: *N* name contains more than one dot character ('.') tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/compile-fail.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/completed.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/expected/compile-fail.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/expected/completed.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/expected/lib.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/expected/misfire.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/expected/no-run.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/expected/run_pyd.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/expected/test-case.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/test-case.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/test-driver.xsl: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_re_match/expected/test_re_match.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_test_case_status/explicit-failures-markup.xml.test: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ *N* name contains more than one dot character ('.') *N* name exceeds 31 characters tools/regression/xsl_reports/test/test-components/test_test_structure/explicit-failures-markup.xml.test: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ *N* name contains more than one dot character ('.') *N* name exceeds 31 characters tools/regression/xsl_reports/xsl/html/issues_legend.html: *A* unlinked file tools/regression/xsl_reports/xsl/html/library_developer_legend.html: *A* unlinked file tools/regression/xsl_reports/xsl/html/library_user_legend.html: *A* unlinked file tools/regression/xsl_reports/xsl/html/make_tinyurl.html: *A* unlinked file tools/regression/xsl_reports/xsl/html/summary_developer_legend.html: *A* unlinked file tools/regression/xsl_reports/xsl/html/summary_user_legend.html: *A* unlinked file tools/regression/xsl_reports/xsl/v2/html/issues_legend.html: *A* unlinked file 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boost/test/impl/results_collector.ipp: *U* unnamed namespace at line 106 boost/test/impl/results_reporter.ipp: *U* unnamed namespace at line 48 boost/test/impl/unit_test_log.ipp: *U* unnamed namespace at line 79 boost/test/impl/unit_test_monitor.ipp: *U* unnamed namespace at line 35 boost/test/impl/unit_test_parameters.ipp: *U* unnamed namespace at line 50 boost/test/results_collector.hpp: *U* unnamed namespace at line 40 boost/test/test_tools.hpp: *U* unnamed namespace at line 262 boost/test/utils/iterator/token_iterator.hpp: *U* unnamed namespace at line 166 boost/test/utils/named_params.hpp: *U* unnamed namespace at line 216 boost/test/utils/runtime/cla/dual_name_parameter.ipp: *U* unnamed namespace at line 43 boost/test/utils/runtime/cla/modifier.hpp: *U* unnamed namespace at line 34 boost/test/utils/runtime/env/modifier.hpp: *U* unnamed namespace at line 34 boost/test/utils/runtime/file/config_file.hpp: *U* unnamed namespace at line 169 *U* unnamed namespace at line 64 *U* unnamed namespace at line 74 boost/test/utils/runtime/file/config_file_iterator.hpp: *U* unnamed namespace at line 68 boost/test/utils/trivial_singleton.hpp: *U* unnamed namespace at line 52 *U* unnamed namespace at line 61 libs/test/build/msvc71_proj/config_file_iterator_test.vcproj: *N* name exceeds 31 characters libs/test/doc/components/prg_exec_monitor/compilation.html: *A* broken link: ../../../build/Jamfile libs/test/doc/components/prg_exec_monitor/index.html: *A* broken link: ../../../../../boost/test/cpp_main.hpp libs/test/doc/components/test_tools/index.html: *A* broken link: ../../tests/boost_check_equal_str.html libs/test/doc/components/test_tools/reference/BOOST_CHECK_CLOSE.html: *A* broken link: BOOST_CHECK_CLOSE_FRACTION.html libs/test/doc/components/test_tools/reference/BOOST_CHECK_MESSAGE.html: *A* broken link: BOOST_MESSAGE.html libs/test/doc/components/test_tools/reference/BOOST_CHECK_SMALL.html: *A* broken link: BOOST_CHECK_CLOSE_FRACTION.html 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What's the boost::math::gamma_Q equivalent in 1.34
by John Ky 25 May '07

25 May '07

Hi, I'm trying to upgrade some software to use boost 1.34 from an earlier version, but I'm stuck on this particular function because I don't understand statistics. #include <boost/integer.hpp> #include <boost/random/gamma_distribution.hpp> inline double alpha_value(int df, double chisq) { if (chisq < 0.0 || df < 1) { return 0.0; } return boost::math::gamma_Q(((double)df) / 2.0, chisq / 2.0); } Does anyone know the equivalent way of doing this in 1.34? Thanks -John

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[Report] 0 regressions on RC_1_34_0 (2007-05-25)
by Douglas Gregor 25 May '07

25 May '07

Boost Regression test failures Report time: 2007-05-25T01:39:47Z This report lists all regression test failures on release platforms. Detailed report: http://engineering.meta-comm.com/boost-regression/CVS-RC_1_34_0/developer/i… No failures! Yay!

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Re: [boost] .[asio] : Problem while clean shut down of multi threaded server
by Gaurav.Jain＠iflexsolutions.com 25 May '07

25 May '07

> On Mon, 21 May 2007 16:37:28 +0530, Gaurav.Jain <at> iflexsolutions.com said: > > Hi, > > > > I am using boost boost 1.33.1 with asio 0.3.8rc2. I have develop a > > Multi-threaded server program using pool of io_service. In my design i > > have pool of io_service object and this pool is controlled by a pool > > manager, which is running over a seprate io_service. I want to do clean > > shutdown of the server. In the clean shut down i want to close each > > connection running over related io_service. > > It's worth noting that this is not the only way to do clean shutdown. > The new HTTP server examples ("server2" and "server3") also perform a > clean shutdown. However, rather than explicitly closing the connections, > they simply rely on the fact that the io_service destructor will destroy > all handler objects associated with unfinished operations. > > > What i am doing is, while > > shutting down the server, pool manager is posting a request to each > > io_service object to shut it down. Each io_service object in turn > > posting a request to all the connection it is hosting to stop > > themselves. The problem i am facing : connection stop method is not > > getting executed at all for each running connection. > > > > Here is a code snippet of what i am doing : > [...] > > scheduler.stop(); > > What is scheduler? Is it an io_service? If so, by explicitly stopping it > some of your completion handlers will never be called. If you want to > use this particular clean shutdown design, it is better to wait for the > io_service::run() call to finish automatically once all the outstanding > operations have finished Yes scheduler is an io_service. I am now not using scheduler.stop() in my code & doing what have you suggested in your reply. But still server is not getting cleanly shutdown as per my design. Here is what am I doing : void tcp_server::handle_stop() { acceptor_.close(); if(io_object_pool_) { delete io_object_pool_; io_object_pool_ = NULL; } } io_object_pool::~io_object_pool() { shutdown_pool(); } void io_object_pool::shutdown_pool() { std::vector<io_object*>::const_iterator iter_output = io_object_vec.begin(); std::vector<io_object*>::const_iterator iter_end_output = io_object_vec.end(); for(; iter_output != iter_end_output; ) { io_object* io_object_temp = *iter_output; iter_output++; io_object_temp->get_ioservice().post(boost::bind(&io_object::stop_all, io_object_temp)); } io_object_vec.clear(); } void io_object::stop_all() { std::set<connection_ptr >::const_iterator iter_output = connections_.begin(); std::set<connection_ptr >::const_iterator iter_end_output = connections_.end(); for(; iter_output != iter_end_output;) { connection_ptr conn_temp = *iter_output; iter_output++; conn_temp->socket().io_service().post(boost::bind(&tcp_connection::stop, conn_temp)); } //scheduler.stop(); execution_thread->join(); } In above code I have also tried with io_service().wrap() instead of post(), but all in vein void tcp_connection::stop() { try { std::cout << "tcp_connection stop called" << std::endl; assigned_io_object_->stop(shared_from_this()); socket_.close(); assigned_io_object_->remove_request(); assigned_io_object_ = NULL; is_connection_stop = true; } catch (std::exception&) { } } The above cout statement is not getting printed, not even for single connection. Can you pls suggest what else is getting wrong here Regards, Gaurav DISCLAIMER: This message contains privileged and confidential information and is intended only for an individual named. If you are not the intended recipient, you should not disseminate, distribute, store, print, copy or deliver this message. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete or contain viruses. The sender, therefore, does not accept liability for any errors or omissions in the contents of this message which arise as a result of e-mail transmission. If verification is required, please request a hard-copy version.

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