June 2013 - Boost-users - lists.preview.boost.org

Nesting bind with shared_ptr<T>::operator* and ref
by Chris Stankevitz 04 Jun '13

04 Jun '13

Hello, Can you please help me uncomment out the last "bind" of the program pasted below? The problem is that it will require some kind of mechanism to dereference the shared_ptr. Thank you, Chris === #include <boost/bind.hpp> #include <boost/function.hpp> #include <boost/make_shared.hpp> #include <boost/shared_ptr.hpp> #include <boost/utility.hpp> using namespace boost; struct C : noncopyable { C() {} void f() {} }; shared_ptr<C> GetC(int) { return … [View More]

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[Spirit] Stack overflow, suspect infinite recursion
by Simon 03 Jun '13

03 Jun '13

Hi, I'm writing a math string parser with boost::spirit and I'm stuck on this stack overflow. I've seen this before when I wrote a rule that was misleading. It's the second time I get these and I'm really not sure how I can troubleshoot this kind of problem. Help would be greatly appreciated. I have no issues parsing the forms "A?B" (where A,B are floats and ? is an arithmetic operator +,-,*,/). No issues parsing "(A)" either... At the moment of writing this, I haven't tried but I … [View More]will be trying to parse simpler forms like "(A)?B" and "A?(B)", "(A?B)", "(A?B)?C" and "A?(B?C)"... I suspect going through them will eventually help me fix the bug with the form below... Below is the final output of my program through valgrind and the rules I have are at the end of my post. I suspect the prob is in the definition for start, operation or operand (an operand may be the result of an operation and an operation is performed on operands). There may be a nasty infinite recursion between operand and operation... The resulting objects are polymorphic and they are correct (as seen when used without spirit). Simon Parsing operations such as ( A?B ) ? ( C?D ) Parsing: (0.1+1.9)+(4.2+6.1) -> (AB=2.000000, CD=10.300000, ABCD=12.300000) ==17013== Stack overflow in thread 1: can't grow stack to 0xb907cfbc ==17013== ==17013== Process terminating with default action of signal 11 (SIGSEGV) ==17013== Access not within mapped region at address 0xB907CFBC ==17013== at 0x13487A: bool boost::spirit::qi::action<boost::spirit::qi::reference<boost::spirit::qi::rule<__gnu_cxx::__normal_iterator<char const*, std::string>, std::string ()(), boost::spirit::unused_type, boost::spirit::unused_type, boost::spirit::unused_type> const>, boost::phoenix::actor<boost::phoenix::composite<boost::phoenix::assign_eval, boost::fusion::vector<boost::spirit::attribute<0>, boost::phoenix::composite<boost::phoenix::detail::new_eval<HS::Language::axIdentifier>, boost::fusion::vector<boost::spirit::argument<0>, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_> >, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_> > > >::parse<__gnu_cxx::__normal_iterator<char const*, std::string>, boost::spirit::context<boost::fusion::cons<HS::Language::axIdentifier*&, boost::fusion::nil>, boost::fusion::vector0<void> >, boost::spirit::unused_type, boost::spirit::unused_type const>(__gnu_cxx::__normal_iterator<char const*, std::string>&, __gnu_cxx::__normal_iterator<char const*, std::string> const&, boost::spirit::context<boost::fusion::cons<HS::Language::axIdentifier*&, boost::fusion::nil>, boost::fusion::vector0<void> >&, boost::spirit::unused_type const&, boost::spirit::unused_type const&) const (action.hpp:50) ==17013== If you believe this happened as a result of a stack ==17013== overflow in your program's main thread (unlikely but ==17013== possible), you can try to increase the size of the ==17013== main thread stack using the --main-stacksize= flag. ==17013== The main thread stack size used in this run was 96002048. ==17013== Stack overflow in thread 1: can't grow stack to 0xb907cfb8 ==17013== ==17013== Process terminating with default action of signal 11 (SIGSEGV) ==17013== Access not within mapped region at address 0xB907CFB8 ==17013== at 0x48224AC: _vgnU_freeres (vg_preloaded.c:58) ==17013== If you believe this happened as a result of a stack ==17013== overflow in your program's main thread (unlikely but ==17013== possible), you can try to increase the size of the ==17013== main thread stack using the --main-stacksize= flag. ==17013== The main thread stack size used in this run was 96002048. ==17013== ==17013== HEAP SUMMARY: ==17013== in use at exit: 410,754 bytes in 25,628 blocks ==17013== total heap usage: 25,847 allocs, 219 frees, 437,192 bytes allocated ==17013== ==17013== LEAK SUMMARY: ==17013== definitely lost: 409,080 bytes in 25,571 blocks ==17013== indirectly lost: 432 bytes in 27 blocks ==17013== possibly lost: 1,050 bytes in 20 blocks ==17013== still reachable: 192 bytes in 10 blocks ==17013== suppressed: 0 bytes in 0 blocks ==17013== Rerun with --leak-check=full to see details of leaked memory ==17013== ==17013== For counts of detected and suppressed errors, rerun with: -v ==17013== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0) Segmentation fault Extract of the grammar: constnum = double_ [_val = new_<axConstant>(_1)]; alpha_numeric = alpha >> +(alnum); ident = alpha_numeric [_val = new_<axIdentifier>(_1)]; operand = ident | constnum | operation; addition = (operand >> lit('+') >> operand) [_val = new_<axAddition>(_1,_2)]; substraction = (operand >> lit('-') >> operand) [_val = new_<axSubstraction>(_1,_2)]; multiplication = (operand >> lit('*') >> operand) [_val = new_<axMultiplication>(_1,_2)]; division = (operand >> lit('/') >> operand) [_val = new_<axDivision>(_1,_2)]; precedence = (lit('(') >> operand >> lit(')')) [_val = new_<axPrecedence>(_1)]; operation = precedence | multiplication | division | addition | substraction; start = operation | operand; } boost::spirit::qi::rule<Iterator, AX*()> start; boost::spirit::qi::rule<Iterator, std::string()> alpha_numeric; boost::spirit::qi::rule<Iterator, axIdentifier*()> ident; boost::spirit::qi::rule<Iterator, axConstant*()> constnum; boost::spirit::qi::rule<Iterator, axOperand*()> operand; boost::spirit::qi::rule<Iterator, axOperation*()> operation; boost::spirit::qi::rule<Iterator, axAddition*()> addition; boost::spirit::qi::rule<Iterator, axSubstraction*()> substraction; boost::spirit::qi::rule<Iterator, axMultiplication*()> multiplication; boost::spirit::qi::rule<Iterator, axDivision*()> division; boost::spirit::qi::rule<Iterator, axPrecedence*()> precedence; }; [View Less]

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Visual Studio Professional 2012
by Scott Alexander 03 Jun '13

03 Jun '13

Hi, Does Boost 1.51 support Visual Studio Professional 2012? I would like to use Boost 1.53 but the latest installer I can find is for 1.51 (from http://www.boostpro.com/download/) Where can I find and installer for the latest version? Thanks, Scott

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Fwd: Compile error using BOOST_FUSION_DONT_USE_PREPROCESSED_FILES
by Fernando Gomes da Silva 03 Jun '13

03 Jun '13

Em quarta-feira, 29 de maio de 2013 17h11min09s UTC-3, Fernando Gomes da Silva escreveu: > > I'm having trouble setting the max template parameters for Boost Fusion > Tuples. > > I've read the source code and found that I can set > BOOST_FUSION_DONT_USE_PREPROCESSED_FILES and set FUSION_MAX_VECTOR_SIZE to > the given number. > > Using MSVC 2012 and using a value of 51, I get the following error: > > \boost_1_53_0\boost\fusion\container\vector\detail\… [View More]

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Using boost from XCODE 4.6.1 - what are the proper build settings?
by B Hart 01 Jun '13

01 Jun '13

I downloaded boost 1.53 and extracted to Users/user/Desktop/boost_1_53_0 I built boost as static libraries following instructions at: http://libcinder.org/docs/v0.8.5/_cinder_boost.html I changed XCODE's "Build Settings" "Header Search Paths" to /Users/user/Desktop/boost_1_53_0 as well as the "Library Search Paths" to Users/user/Desktop/boost_1_53_0/stage/lib Then I build and get errors: The first error I'm getting is "has_binary_operator.hpp" Parse issue Expected member name or ';' after … [View More]

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[mpl] Using max_element inside a fold while constructing a vector
by Brendon Costa 01 Jun '13

01 Jun '13

Hi, I have been using boost.mpl for the first time recently and have solved a number of tasks with boost.mpl now but have a problem with a bit of code I thought should be working. What is wrong with this bit of code using boost.mpl? typedef vector<int_<0>, int_<3>, int_<2> > v1; // I want to use max_element on a vector I am in the process of constructing using a fold typedef typename fold<v1, vector<int_<0> >, push_back<_1, deref<max_element<… [View More]

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[Thread] Can't compile package_task code with 1.54
by Szymon Gatner 01 Jun '13

01 Jun '13

Hi, I just tried to compile my 1.52- based code with 1.54 beta and run into package_task compilation issue. In 1.52 I was using BOOST_THREAD_VERSION=3 define but with 1.54 I complied with =4. Test program: #define BOOST_THREAD_VERSION 4 #include <boost/thread/future.hpp> #include <boost/function.hpp> struct MyFunc { void operator()()const {} }; int main() { boost::function<void()> f; MyFunc mf; boost::packaged_task<void()> t1(f); // error 1 boost::… [View More]

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[1.54.0] Beta Release Candidates available
by Marshall Clow 01 Jun '13

01 Jun '13

Release candidate files for 1.54.0 beta 1 are available at http://boost.cowic.de/rc/ As always, the release managers would appreciate it if you download the candidate of your choice and give building it a try. Please report both success and failure, and anything else that is noteworthy. This helps ensure the candidates build OK before we push them out to SourceForge. The files (and associated md5s) are: 31266b7dcc6f557ad839e4e87317cd6e *boost_1_54_0_beta1_rc1.tar.gz … [View More]

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