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[MSM] How to use is_flag_active inside on_entry ?
by Gábor Márton 27 Aug '11

27 Aug '11

Hi, I would like to use is_flag_active<SomeFlag>() function inside one of my state's on_entry template function: struct StBladeDown : public msm::front::state<> { template<class Event, class FSM> void on_entry(Event const& event, FSM& fsm) { if(fsm.is_flag_active<FlagMaster>()) { // ERROR // doSomeThing(); } } }; However I got the following compile error: StOk.hpp: In member function 'void mr::mrd::amfo::StOk_::StBladeDown::on_entry(const Event&, FSM&)': StOk.hpp:78: error: expected primary-expression before '>' token StOk.hpp:78: error: expected primary-expression before ')' token However outside of the state machine, I mean if I first declare a state machine, I can use the is_flag_active: StAMFODirector backEnd; backEnd.start(); processEvent(backEnd,EvBladeDown()); processEvent(backEnd,EvMaster()); if(backEnd.is_flag_active<FlagMaster>()){ // OK _LOG_DEBUG("Flag Master active"); } If I use the front_end's is_flag_ I get compiler error again (no such function in msm::back::state_machine). Any idea how to use is_flag_active together with on_entry? Or if it is not possible are there any alternatives? Thanks for any help, Gabor

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Re: [Boost-users] Simple serial port demonstration with boost asio asynchronous I/O
by jhodapp 27 Aug '11

27 Aug '11

Any reason why you can't use Ubuntu's package for Boost? Do you need the latest version of Boost? If you use the Ubuntu packages, you should have no issues as I was successfully able to run that example on my Ubuntu installation. On Aug 27, 2011, at 9:55 AM, drwho [via Boost] wrote: > New to boost. (Ubuntu 10.10) Downloaded boost 1.47 source. Built it with ./bootstrap.sh and ./b2 Keep getting linker failure, undefined reference to `boost::system::get_system_category() in my QT app. Tried your serial example from bash, same thing.... > > drwho@drwho-desktop:~/Projects/prog$ g++ -Lboost/stage/lib -lboost_system -lboost_thread serial.cpp -o test > /tmp/ccvTv9iN.o: In function `__static_initialization_and_destruction_0(int, int)': > serial.cpp:(.text+0x3cf): undefined reference to `boost::system::get_system_category()' > serial.cpp:(.text+0x3d9): undefined reference to `boost::system::get_generic_category()' > serial.cpp:(.text+0x3e3): undefined reference to `boost::system::get_generic_category()' > serial.cpp:(.text+0x3ed): undefined reference to `boost::system::get_generic_category()' > serial.cpp:(.text+0x3f7): undefined reference to `boost::system::get_system_category()' > /tmp/ccvTv9iN.o: In function `boost::system::error_code::error_code()': > serial.cpp:(.text._ZN5boost6system10error_codeC1Ev[boost::system::error_code::error_code()]+0x10): undefined reference to `boost::system::get_system_category()' > /tmp/ccvTv9iN.o: In function `boost::asio::error::get_system_category()': > serial.cpp:(.text._ZN5boost4asio5error19get_system_categoryEv[boost::asio::error::get_system_category()]+0x7): undefined reference to `boost::system::get_system_category()' > collect2: ld returned 1 exit status > > > If you reply to this email, your message will be added to the discussion below: > http://boost.2283326.n4.nabble.com/Simple-serial-port-demonstration-with-bo… > To unsubscribe from Simple serial port demonstration with boost asio asynchronous I/O, click here. -- View this message in context: http://boost.2283326.n4.nabble.com/Simple-serial-port-demonstration-with-bo… Sent from the Boost - Users mailing list archive at Nabble.com.

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boost.log compilation
by asif saeed 27 Aug '11

27 Aug '11

Hi, I am having problems compiling boost.log. I am using Visual C++ 2010 Express. There is no project/solution file for VS2010. Perhaps I need to use bjam but executing "bjam Jamfile.v2" doesn't result in anything. Can you please give me a simple command for compiling boost.log for Visual C++ 2010 Express - 32-bit targeted at Windows Server 2003? I can read BJam docs but that'll take too much time - I need to compile boost.log urgently. Thanks in advance, Asif

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Using boost unit test with QtCreator
by Wilhelm 26 Aug '11

26 Aug '11

Hi all, if one uses the boost unit test macros (see below), qtcreator marks the BOOST_CHECK(...) macros as syntax error (expected ;): #include <boost/test/unit_test.hpp> #include "person.h" BOOST_AUTO_TEST_CASE(Person1) { Person p("Hugo", "Tester"); BOOST_CHECK(p.firstname() == "Hugo"); BOOST_CHECK(p.lastname() == "Tester"); } Does anybody know how to avoid this (yes, I can use the Qt unit testing framework, but thats not a solution in this special case)? -- Wilhelm

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[Containers] Marshalling deques
by Brian Wood 26 Aug '11

26 Aug '11

There's a thread here -- http://groups.google.com/group/comp.lang.c++/browse_thread/thread/0a6a19f83… that I'd like to mention. Does the deque in the Containers library have support for accessing the chunks it uses? Would you be willing to add a function that gives that? Tia. Shalom, Brian Wood Ebenezer Enterprises http://webEbenezer.net

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asio tcp::resolver, service resolution
by Lloyd 26 Aug '11

26 Aug '11

Hi, In documentation I saw that using tcp::resolver::query constructor it is possible to resolve domain.name as well as service name, as shown in the following code fragment. boost::asio::io_service ios; boost::asio::ip::tcp::resolver resolver(ios); boost::asio::ip::tcp::resolver::query query("mydomain.com","myservice"); Here 'myservice' is not a well known service (port number). For resolving 'myservice' where should I add the port number? in my domain name server's (BIND) /etc/services file or in my local systems services file? Or is it 'really' possible to resolve a service name? Thanks, Lloyd

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accumulator: serialization support
by Neal Becker 26 Aug '11

26 Aug '11

I have typedef accumulator_set<el_t,stats<tag::mean,tag::abs_sqr> > accum_t; How can I add serialization?

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[qi][lambda] Get wrong reaction of the qi::rule if I use lambda for the action
by boost_mailinglist＠gmx.de 26 Aug '11

26 Aug '11

Hello, if I execute the following example, I get the following output "The bad one The good one a" but I only expected "The good one a". Why does it happens? Boost 1.47.0 was used. #include <boost/config/warning_disable.hpp> #include <boost/spirit/include/qi.hpp> #include <boost/lambda/lambda.hpp> #include <iostream> int main() { using boost::spirit::qi::char_; using boost::spirit::qi::parse; char const *first = "{a}", *last = first + std::strlen(first); parse(first, last, '{' >> char_("a")[std::cout << "The good one " << boost::lambda::_1 << '\n'] | char_("b")[std::cout << "The bad one " << boost::lambda::_1 << '\n'] >> '}'); return 0; }

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[boost::polygon::transform.hpp] Concatenation of transformations fails.
by Dimitris Dakopoulos 26 Aug '11

26 Aug '11

Hello to all, I want to apply to geometrical transformations (in this case translations) on a point. Point3D trans1(1,0,0); Point3D trans2(2,0,0); Point2D p(100,100); gtl::transformation<int> T1( trans1 ); gtl::transformation<int> T2( trans2 ); gtl::transform( p, T1 ); gtl::transform( p, T2 ); --- ... and the point's coordinates are (97,100) as expected. --- When I try to concatenate the transformations: Point3D trans1(1,0,0); Point3D trans2(2,0,0); Point2D p(100,100); gtl::transformation<int> T1( trans1 ); gtl::transformation<int> T2( trans2 ); gtl::transform( p, T1 + T2 ); --- ... and I get random numbers. I checked the boost/polygon/detail/transform_detail.hpp template <typename coordinate_type> inline const transformation<coordinate_type>& transformation<coordinate_type>::operator+=(const transformation<coordinate_type>& tr){ //apply the inverse transformation of this to the translation point of that //and convolve it with this translation point coordinate_type x, y, z; transformation<coordinate_type> inv = inverse(); inv.transform(x, y, z); p_.set(HORIZONTAL, p_.get(HORIZONTAL) + x); p_.set(VERTICAL, p_.get(VERTICAL) + y); p_.set(PROXIMAL, p_.get(PROXIMAL) + z); //concatenate axis transforms atr_ += tr.atr_; return *this; } ... and I noticed that the coordinate_type x, y, z; is not initialized and then the transformation is applied: inv.transform(x,y,z); which of course results to something random. Any ideas? Thank you for checking. Dimitris

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[serialization] The famous non-const value trap
by cc caprani 26 Aug '11

26 Aug '11

Hi Boosters, I had the compile time warning discussed here ( http://boost.2283326.n4.nabble.com/Serialization-C4308-warning-with-MSVC9-t…) that Robert is probably fed up discussing. I've read for months, but didn't want to const_cast my object (or is it ok sometimes?). However, making my destructor virtual removed the warning. Here's my question: why does making the object destructor virtual remove the warning, effectively making my object instances const? And the section on this trap from the Rationale section of the Serialization documentation is not in the1.47 version (howcome?) but can be found in previous version here: http://www.boost.org/doc/libs/1_39_0/libs/serialization/doc/rationale.html#… Oh, and please forgive me if the answer is *obvious* - just an intermediate programmer. Colin

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