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boost::tr1::tuple or boost::tuple? how to compile the same code with both -std=c++98 and -std=c++11?
by Frédéric Bron 12 Sep '13

12 Sep '13

This small program compiles nicely with g++ 4.6.4 and -std=c++98 and boost 1.52.0: #include <iostream> #include <boost/math/tools/roots.hpp> #include <boost/tr1/tuple.hpp> std::tr1::tuple<double, double> f(double x) { return std::tr1::tuple<double, double>(x, 1.); } int main() { std::cout<<boost::math::tools::newton_raphson_iterate(f, 10., -9., +20., 10); return 0; } Now, I would like to be able to compile that program also with g++ 4.8.1 and -… [View More]

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Regex on Windows2012
by Michael Xanadu 11 Sep '13

11 Sep '13

Hi guys, I developed a little application called MyProgram.exe (Win7, VS2008 SP1, Qt 4.8.4) and a little DLL called MyLibrary.dll. The DLL uses BOOST's regex engine 1.5. The executable calls the DLL via couple of functions, one function inside the DLL uses the regex engine. I've tested the environment on Windows7 and all is OK. BUT: If I copy the application and the DLL to Windows2012 I see that the executable crashes if I use it. I took a closer look to the issue and found out that the cause … [View More]

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syntax error reporting from imported python modules
by Richi Lists 11 Sep '13

11 Sep '13

Hi, when I execute a python script that contains errors, I get nice and complete information from boost::python::error_already_set about the error and it's location. If the script that contains a syntax error is not executed directly, but imported from the main script, I don't get that exception. Instead it returns from the function as if everything was successful. When I check the result, the tasks from the other files were performed, just the stuff from the erroneous file is missing. Do I … [View More]

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[BOOST]BOOST_AUTO_TEST_CASE_TEMPLATE usage
by Hemanth Choudary M V (RBEI/ETA1) 11 Sep '13

11 Sep '13

Hi, In the code snippet below, The 3rd parameter in the BOOST_AUTO_TEST_CASE_TEMPLATE is a boost::mpl::list. Is the 3rd parameter restricted only to boost::mpl::list or anything else can also be used? #define BOOST_TEST_MODULE example #include <boost/test/included/unit_test.hpp> #include <boost/test/test_case_template.hpp> #include <boost/mpl/list.hpp> //____________________________________________________________________________// typedef boost::mpl::list<long long,… [View More]

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shared_ptr to this
by Gonzalo Garramuno 10 Sep '13

10 Sep '13

I have an application where I need to pass "this" in a callback belonging to a class to a function using a shared_ptr in another thread In code: struct Data { Data( void* p ) : ptr( p ) { } boost::shared_ptr<void> ptr; }; void threadA( Data* d ) { boost::shared_ptr<void> ptr( d->ptr ); delete d; // use ptr } class A { void init_thread() { Data* data = new Data( this ); boost.thread t( boost::bind( threadA, data ) ); … [View More]

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[wave] Wave macro expansion problem
by Edward Diener 10 Sep '13

10 Sep '13

The code: // test_macros_o.cpp #define f(a) f(x + (a)) #define x 2 #define g f #define h g(~ int main() { #pragma wave trace(enable) h 5); #pragma wave trace(disable) return 0; } In the latest C++ standard at 16.3.5 paragraph 5 the expansion of 'h 5)' is given as: f(2 * (~5)) but the wave.exe driver gives: C:\Programming\VersionControl\boost\libs\vmd\test\test_macros_o.cpp:11:3: h C:\Programming\VersionControl\boost\libs\vmd\test\test_macros_o.cpp:4:9: see … [View More]

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[wave] Wave driver --c++0x option
by Edward Diener 10 Sep '13

10 Sep '13

After building the Wave driver tool from the latest Boost source on trunk, if I pass the --c++0x option to the Wave.exe driver I get: wave: exception caught: unrecognised option '--c++0x' Do I have to build the wave driver with some option to support the --c++0x option when running it ?

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Re: [Boost-users] [BOOST.PREPROCESSOR] Use BOOST_PP_REPEAT in macros?
by Sergey Zhuravlev 10 Sep '13

10 Sep '13

I foolishly undef ARGS_AMOUNT after using. It is habit, because not wrote global macros earlier. Thanks, Edward Diener.

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[BOOST.PREPROCESSOR] Use BOOST_PP_REPEAT in macros?
by Sergey Zhuravlev 10 Sep '13

10 Sep '13

Write code: ////////////////// #define ARGS_AMOUNT 9 #define INTERNAL_GENERATE_MEMBER_APPLY_CLASS(_, ARG_COUNTER, MemberName)\ template<class TClassWithMember BOOST_PP_COMMA_IF(ARG_COUNTER) BOOST_PP_ENUM_PARAMS(ARG_COUNTER, class TArg)>\ result_type operator()(\ TClassWithMember& classWithMember BOOST_PP_COMMA_IF(ARG_COUNTER)\ BOOST_PP_ENUM_BINARY_PARAMS(ARG_COUNTER, TArg, &arg)) const\ {\ classWithMember.MemberName(BOOST_PP_ENUM_PARAMS(ARG_COUNTER, arg));\ … [View More]

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[thread] release lock before cond.var. notified?
by Thomas M 09 Sep '13

09 Sep '13

Hi, Consider a boolean variable, a mutex and a condition variable: // simplified code snippet begin bool Continue = false; boost::mutex someMutex; boost::condition_variable someCondVar; // simplified code snippet end A number of (boost-)threads check if the boolean variable is set to true in order to continue execution, or otherwise wait for this to happen: // simplified code snippet begin boost::unique_lock<boost::mutex> threadLock(someMutex); while (Continue == false) { … [View More]

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