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[msm]Event convert at exit point
by Takatoshi Kondo 17 Oct '11

17 Oct '11

Hello, I have a question about Boost.Msm event conversion at exit pseudo state. (Version 1.47.0) http://www.boost.org/doc/libs/1_47_0/libs/msm/doc/HTML/ch03s02.html#d0e942 Exit pseudo states struct event6 { event6(){} template <class Event> event6(Event const&){} }; //convertible from any event Above document said that we can convert the event using the template constructor. This exmaple doesn't access the constructor's parameter. I want to propagate some value of the event. Event2 is a source event. And Event3 is a target event like this.(see attached file) struct Event2 { Event2(int val_):val(val_) {} int val; }; struct Event3 { Event3(int val_):val(val_) {} template <class T> Event3(T const& e):val(e.val) {} // error Event3(Event2 const& e):val(e.val) {} // OK int val; }; // Transition table struct transition_table:mpl::vector< // Start Event Next Action Guard msmf::Row < SubState1, Event2, Exit, msmf::none, msmf::none > > {}; struct Exit :msm::front::exit_pseudo_state<Event3> {}; But compile error occurred. The compiler said Event1 doesn't have a member 'val'. I'm not sure why Event3's constructor instantiate from Event1. This is the question. If I define the constructor that has a parameter Event2 instead of template parameter, compile error doesn't occur. exit_pt_convert.cpp(attached file) is a source code that reproduces this error. Thanks, Takatoshi

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Extra files in release branch
by Marshall Clow 17 Oct '11

17 Oct '11

As of revision #74996, the following files and directories exist only in the release branch - not in the trunk. Is this on purpose? boost/smart_ptr/enable_shared_from_this2.hpp boost/test/detail/unit_test_parameters.hpp boost/test/exception_safety.hpp boost/test/impl/unit_test_suite.ipp boost/test/interaction_based.hpp boost/test/logged_expectations.hpp boost/test/mock_object.hpp boost/test/test_observer.hpp boost/test/unit_test_suite_impl.hpp boost/test/utils/callback.hpp libs/phoenix/doc/html/phoenix-doc_HTML.manifest libs/test/example/cla/Jamfile libs/test/example/unit_test_example_011.cpp libs/test/example/unit_test_example_012.cpp libs/test/src/unit_test_suite.cpp libs/test/test/CMakeLists.txt libs/geometry/test/ranges (empty directory) libs/phoenix/doc/html/phoenix (not empty directory) libs/spirit/doc/html/spirit (not empty directory) libs/spirit/repository/doc/html/spirit_repository (not empty directory) libs/test/doc/html/utf/usage-recomendations (not empty directory) -- Marshall Marshall Clow Idio Software <mailto:mclow.lists@gmail.com> A.D. 1517: Martin Luther nails his 95 Theses to the church door and is promptly moderated down to (-1, Flamebait). -- Yu Suzuki

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Adding a --log_level="message" runtime option to a Boost.test test-suite
by Paul A. Bristow 16 Oct '11

16 Oct '11

Can anyone tell me how to add a --log_level="message" runtime option to a Boost.Test test-suite. Running using VS project I have a Custom Build Step command line "$(TargetDir)$(TargetName).exe" --log_level="message" I'd like to replicate this in a jamfile : ... test-suite "multiprecision EFX numerical test" : [ run numerical_test.cpp ] ; but adding --log_level="message" (and perhaps other Boost.test options as well). (I want this for all compilers of course, so placing in compile options doesn't seem right.) Suggestions most welcome. Thanks Paul --- Paul A. Bristow, Prizet Farmhouse, Kendal LA8 8AB UK +44 1539 561830 07714330204 pbristow(a)hetp.u-net.com

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Unittest capability for meta-programs feedback request
by Ben Robinson 16 Oct '11

16 Oct '11

This submission would make it possible to write a complete set of unit tests for meta-programs, to test both the positive, compiling statements, and the negative, non-compiling statements. These tests will all compile, and the negative tests can throw an exception instead of failing to compile. The submission source is available at https://github.com/icaretaker/Metatest. The provided examples are based on the factorial metafunction from Chapter 8 of "C++ Template Metaprogramming" by David Abrahams and Aleksey Gurtovoy - http://www.boostpro.com/mplbook/. Chapter 8 explains the rational behind the BOOST_MPL_ASSERT_* macros. This submission complements these macros by allowing the writing of regression unit tests, to ensure the user will encounter the mpl formatted compiler error, if the library types are incorrectly instantiated. Currently, many meta-programs are written using one of the BOOST_MPL_ASSERT_* macros. Unit tests for these metaprograms must of course compile, therefore unittests for these programs can verify that valid types produce the correct run-time behavior. This submission provides the following four complementary macros: BOOST_METATEST(pred) BOOST_METATEST_NOT(pred) BOOST_METATEST_RELATION(x, rel, y) BOOST_METATEST_MSG(cond, msg, types) Meta-program authors can use these macros to assert predicates/relations/conditions exactly as done with BOOST_MPL_ASSERT_*. In shipped library code, these four macros exactly forward to their BOOST_MPL_ASSERT_* counterparts, since the BOOST_MPL_ASSERT_* macros do an excellent job of providing maximally informative compiler error messages. In unit test code (where BOOST_METATEST_RUNTIME will need to be defined), these macros will instead instantiate an object, which will throw a runtime exception if the predicate/relation/condition fails. Now meta-program authors can write unittests like the following: BOOST_AUTO_TEST_CASE(factorials_should_not_be_negative) { BOOST_CHECK_THROW( factorial<mpl::int_<-1> > instance;, metatest_exception ); } As you can see, this unit test validates that the factorial meta-function will in fact fail to compile. All exceptions are subclassed from boost::metatest_exception. If the user would instead like to supply their own exception types for individual assertions, one of the following four macros can be used alternatively: BOOST_METATEST_EXP(pred, exp) BOOST_METATEST_NOT_EXP(pred, exp) BOOST_METATEST_RELATION_EXP(x, rel, y, exp) BOOST_METATEST_MSG_EXP(cond, msg, types, exp) Another feature of this library, is that it is independent of any unit testing framework, provided the framework can catch exceptions by type. The examples provided show how this is done with Boost Test. The submission files also show how to use try/catch directly should your unit test framework not have such a capability. I look forward to your feedback. Thank you, Ben Robinson, Ph.D.

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[test] Still having issues
by John Maddock 16 Oct '11

16 Oct '11

I'm still having a lot of issues with the latest Boost.Test not building: On Win32 with Intel's 11.1 and 12.1 compilers I see: ..\..\..\boost/test/impl/execution_monitor.ipp(104): error: invalid redeclaration of type name "_invalid_parameter_handler" (declared at line 228 of "C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\stdlib.h") typedef void* _invalid_parameter_handler; And on Ubuntu Linux with gcc I see: gcc.compile.c++ /home/john/bin/boost/bin.v2/libs/test/build/gcc-4.4.3/debug/link-static/unit_test_main.o In file included from ../../../libs/test/src/unit_test_main.cpp:16: ../../../boost/test/impl/unit_test_main.ipp: In function 'int boost::unit_test::unit_test_main(boost::unit_test::test_suite* (*)(int, char**), int, char**)': ../../../boost/test/impl/unit_test_main.ipp:97: error: 'getchar' is not a member of 'std' "/usr/local/gcc/4.4.3/bin/g++" -ftemplate-depth-128 -O0 -fno-inline -Wall -pedantic -g -DBOOST_ALL_NO_LIB=1 -I"../../.." -c -o "/home/john/bin/boost/bin.v2/libs/test/build/gcc-4.4.3/debug/link-static/unit_test_main.o" "../../../libs/test/src/unit_test_main.cpp" Probably a missing <cstdio> include? John.

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[1.48] Reminder: merge fixes by Monday!
by Eric Niebler 14 Oct '11

14 Oct '11

Just a reminder that as of Monday, the release branch will be closed except for permission by a release manager. If you have fixes to merge to the release branch, please try to get them in over the weekend. Here's the schedule: October 10: The release branch was closed for major code changes. It is still open for serious problem fixes and docs changes. October 17: branches/release closed for all library changes except when specific permission given by release manager(s). October 24: Beta target date. Further betas and/or release candidates as feedback dictates. November 7: Release target date View Boost calendar: http://tinyurl.com/4xacpyj Thanks, -- Eric Niebler BoostPro Computing http://www.boostpro.com

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Is Boost interested in the Boost-based Base64 library
by Denis Shevchenko 14 Oct '11

14 Oct '11

Hi all! Not so long ago I was looking for a solution to Base64 encoding/decoding. In this page - http://www.boost.org/doc/libs/1_46_1/libs/serialization/doc/dataflow.html - I found example of such solution, with 'base64_from_binary' and 'transform_width' iteartors. But it is just a "blank", not ready-to-use solution. I created solution. But I definitely know many developers looking for a simple, ready-to-use, header-only and 'real C++' solution for Base64. So I want to offer you such solution. Some examples: int main() { std::string my_text = "My text for encoding!"; std::string encoded_text = boost::base64().encode( my_text ); std::string my_text_again = boost::base64().decode< std::string >( encoded ); } For binary data: int main() { typedef std::vector< unsigned char > binary_string; binary_string my_bin = list_of( 0xFF )( 0xAA )( 0x01 ); std::string encoded_bin = boost::base64().encode( my_bin ); binary_string my_bin_again = boost::base64().decode< binary_string >( encoded ); } For streams: int main() { boost::filesystem::ifstream my_jpeg( "/some/path/to/my/image" ); // fstream checking omitted... std::string encoded_jpeg = boost::base64().encode( my_jpeg ); boost::filesystem::ofstream my_jpeg_again( "/some/path/to/decoded/image" ); // fstream checking omitted... boost::base64().decode( encoded_jpeg, my_jpeg_again ); } This is first variant. IMHO such solution will be useful for Boost users. What you think about it? - Denis

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[date_time] performance tests
by Greg Rubino 13 Oct '11

13 Oct '11

Hi all, Does anyone know of/have an open source suite of performance tests for Boost.Date_Time? If not, I'll post back with whatever I come up with. Thanks, Greg

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Checking interest in to_string functions
by Antony Polukhin 13 Oct '11

13 Oct '11

As was mentioned in `[boost] to_string(v)` 1) Functions to_string and to_wstring are part of the upcoming C++0x standard. However, there are no functions for char16_t and char32_t conversions. 2) Some users can't use C++11 in some projects for quite some time, but can use boost. 3) "to_string(5)" is a lot shorter than "lexical_cast<std::string>(5)". Some users would like to use a shorter form. Is there interest in stoi, stoll, stof, to_string, to_wstring, to_u16string, stod and other functions for char, wchar_t, char16_t and char32_t conversions? Shall I add them to lexical_cast library, or as a separate conversion library? Best regards, Antony Polukhin

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[ASIO] tcp::socket::async_connect() connections count
by Jim Xochellis 13 Oct '11

13 Oct '11

Hi list, I am testing a slightly modified version of the chat_client/chat_server ASIO examples and I have noticed that, immediately after the tcp::socket::async_connect() call from inside the chat_client constructor, the client is creating and establishing not one, but three TCP connections, only one of which is targeting to the server-port. Furthermore, calling repeatedly the async_connect() seems to constantly create three connections per call. I have also noticed that other programs in my system, which also communicate via TCP (ie the hyper-terminal), only open one connection at the client side. Is this async_connect() behavior, which I have mentioned above, the expected/natural behavior, or maybe I am doing something wrong? If this behavior is expected, is there a reason for it? Do I have a choice to change it? Please note that there is a near-4000 outbound concurrent connections default limit in many Windows-XP installations, hence this question has a practical meaning. Configuration informations: OS: Windows XP Pro SP3 Boost version: 1.46.1 IDE: MVS 2005 Thank you in advance, Jim Xochellis ----- Homepage: https://sites.google.com/site/xochellis/ -- View this message in context: http://boost.2283326.n4.nabble.com/ASIO-tcp-socket-async-connect-connection… Sent from the Boost - Dev mailing list archive at Nabble.com.

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