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[spirit] what's wrong with my parser ?
by Kamil Zubair 03 Jun '10

03 Jun '10

I try to make parser for the following string: "value = x" or "value = [x1, x2]" I also want to retrieve the value of x or x1 and x2. My minimum code that will produce error is like this: typedef pair<float, boost::optional<float> > range_val; rule<string::const_iterator, range_val(), locals<float, boost::optional<float> > > range_value; rule<string::const_iterator> valid_line; range_value = (float_[_a = _1] | ("[" >> *space >> float_[_a = _1] >> ',' >> float_[_b = _1] >> *space >> "]"))[_val = boost::phoenix::bind(make_pair<float, boost::optional<float> >, _a, _b)]; valid_line = "value = " << range_value; I'm using vs 2008 with boost 1.43, the above code will produce this error: 1>f:\library\boost_1_41_0\boost\spirit\home\qi\nonterminal\rule.hpp(176) : error C2664: 'boost::mpl::assertion_failed' : cannot convert parameter 1 from 'boost::mpl::failed ************(__thiscall boost::spirit::qi::rule<Iterator>::=::error_invalid_expression::* ***********)(Expr)' to 'boost::mpl::assert<false>::type' 1> with 1> [ 1> Iterator=std::_String_const_iterator<char,std::char_traits<char>,std::allocator<char>>, 1> Expr=boost::proto::exprns_::expr<boost::proto::tag::shift_left,boost::proto::argsns_::list2<boost::proto::exprns_::expr<boost::proto::tag::terminal,boost::proto::argsns_::term<const char (&)[9]>,0>,boost::spirit::qi::rule<std::_String_const_iterator<char,std::char_traits<char>,std::allocator<char>>,range_val (void),boost::spirit::locals<float,boost::optional<float>>> &>,2> 1> ] 1> No constructor could take the source type, or constructor overload resolution was ambiguous 1> f:\project\experiment\spirit\spirit.cpp(82) : see reference to function template instantiation 'boost::spirit::qi::rule<Iterator> &boost::spirit::qi::rule<Iterator>::operator =<boost::proto::exprns_::expr<Tag,Args,Arity>>(const Expr &)' being compiled 1> with 1> [ 1> Iterator=std::_String_const_iterator<char,std::char_traits<char>,std::allocator<char>>, 1> Tag=boost::proto::tag::shift_left, 1> Args=boost::proto::argsns_::list2<boost::proto::exprns_::expr<boost::proto::tag::terminal,boost::proto::argsns_::term<const char (&)[9]>,0>,boost::spirit::qi::rule<std::_String_const_iterator<char,std::char_traits<char>,std::allocator<char>>,range_val (void),boost::spirit::locals<float,boost::optional<float>>> &>, 1> Arity=2, 1> Expr=boost::proto::exprns_::expr<boost::proto::tag::shift_left,boost::proto::argsns_::list2<boost::proto::exprns_::expr<boost::proto::tag::terminal,boost::proto::argsns_::term<const char (&)[9]>,0>,boost::spirit::qi::rule<std::_String_const_iterator<char,std::char_traits<char>,std::allocator<char>>,range_val (void),boost::spirit::locals<float,boost::optional<float>>> &>,2> 1> ] can someone point out what's wrong with my parser ?

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Buffer overrun error when calling std::exception::what() on boost::asio exception
by Brodie Thiesfield 03 Jun '10

03 Jun '10

Hi, OS: Windows Compiler: MSVC 2008 SP1 (9.0) Boost: 1.43.0 I am using boost asio, with an implementation of an SSL acceptor. I am setting up the context for the SSL, calling "use_private_key_file" on boost::asio::ssl::context. The file that I am specifying is invalid or doesn't exist, which causes asio to throw an error via: boost/asio/ssl/basic_context.hpp:289 boost::asio::detail::throw_error(ec); I catch the exception in a catch block like: catch (const std::exception& e) { fprintf(stderr, "exception: %s\n", e.what()); return false; } When I call e.what() everything blows up with a buffer overrun error. The stack looks like the following. The m_cat->message() call is causing the error (but I can't step into it for some reason). boost/system/error_code.hpp:350 std::string message() const { return m_cat->message(value()); } boost/system/system_error.hpp:68 m_what += m_error_code.message(); All libraries are built as static libs with the same compiler (OpenSSL, Boost). I've tried compiling with BOOST_EXCEPTION_DISABLE defined but it makes no difference. I've tried removing the const from the catch clause, but no difference. Has anyone seen an error like this before? I am frustrated by this error and don't know how to look into it further. Any suggestions? Regards, Brodie

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issue when building boost with msvc2010
by Sean Farrow 03 Jun '10

03 Jun '10

Hi: When building boost with msvc 2010, I get a c1083 unable to open file with windows.h. My command line is: Bjam -toolset=msvc -stage -build-type=complete Even though as the output asks I have called vcvarsall.bat. A portion of the log follows: compile-c-c++ bin.v2\libs\test\build\msvc-10.0\debug\asynch-exceptions-on\link-static\ru ntime-link-static\debug.obj debug.cpp C:\Program Files\boost\boost/test/impl/debug.ipp(32) : fatal error C1083: Cannot open include file: 'windows.h': No such file or directory call "C:\Program Files\Microsoft Visual Studio 10.0\VC\vcvarsall.bat" x86 >nul cl /Zm800 -nologo @"bin.v2\libs\test\build\msvc-10.0\debug\asynch-exceptions-on\link-static\ runtime-link-static\debug.obj.rsp" ...failed compile-c-c++ bin.v2\libs\test\build\msvc-10.0\debug\asynch-exceptions-on\link-static\ru ntime-link-static\debug.obj... Anyone got any ideas, do I need to set up some environment variables? Vs2008 builds fine with the latest windows sdk, the latest windows sdk configuration tool doesn't allow integration with vc2010. Help appreciated as always. Regards Sean. Regards

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[lamda] smart self binding of a function object
by alfC 02 Jun '10

02 Jun '10

Hi, I usually have function-classes that take two arguments. class f{ double operator()(double x, double y) const { x*y+y; } }; called as: f myf; cout << myf(4.,3.); for some purposes I need a function of only one variable (parametrized in the first or second argument. So I end up doing: using boost::function; using namespace boost::lambda; function<double(double)> myf_at5 = bind(&f::operator(), myf, 5., _1); // myf_at5 is myf(5.,*) So, now I can pass myf_at5 to something that accepts a function of one variable. root_finder( myf_at5, ...); since I have access to f I would like to make f smart enough to handle its own binding. Eg. class f{ ... // same as before function<double(double)> operator()(double x_value, YYYY y_arg){ return bind( &f::operator(), //maybe needs cast to double(*) (double,double) *this, x_value, y_arg ); } function<double(double)> operator()(XXXX x_arg, double y_value){ return bind( &f::operator(), //maybe needs cast *this, x_arg, y_value ); } }; The question is: What should be the type of XXXX and YYYY? in such a way that I can just call root_finder( myf(5., _1) , ... ); or more complicated things like root_finder( myf(5., _1 * 2.), ...); in other words, myf(5.,_1) is the same as the old bind(&f::operator(), myf, 5., _1); Thank you, Alfredo answers using other libraries are also accepted :)

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Is an iterator the answer?
by Eric Fowler 02 Jun '10

02 Jun '10

I have a bit of a problem here, and would like some input. I am working on an optimization algorithm that makes much use of shortest-paths and near-neighbor concepts. To get a reasonable near-neighbor search on points on the Euclidean plane, I have implemented (mostly) a Delaunay tree as a Boost graph. The points on the graph represent points in space, and are unique. I make use of angles and cosines and such to find neighbors and so on. The Delaunay graph is a basis for the optimization and shortest-paths stuff, which encompasses concepts other than just points-in-space, like type-of-point and so on. The basic idea is that when I am traversing my graph looking for optimal paths and such, I use the Delaunay graph to find near neighbors. Now, here is the problem: my graph really needs for vertices to share points in space. Each vertex has a location and other properties, so there needs to be several vertices at one point. To have a Delaunay graph with coincident points is not really meaningful; the geometry gets really weird (e.g. what is the angle between three coincident points?). So I had figured I could build the Delaunay graph, and put a thin layer on it that handled reference counts for points in space, and stored vertices with all their attendant extra information. So I would make a class that had a map<> of points-in-space and their refcounts, and as I added or deleted points I would bump the counter. As far as the Dr. Delaunay knew, all points would be unique; every coincident point would share it's neighbors with it's brothers. Problem is, how to do a (for instance) breadth-first search over this graph, in which the graph algorithm needs to "see" each point individually? My thinking right now is that I can have my structure as described and build a custom iterator, then pass the iterator to the various search algorithms and visitors and what not. The iterator would have the intelligence to sort out the non-unique points. So the simple question is: am I on the right track? Is this kind of thing feasible or supported by the library? If it is, how do I specify my iterator to the various algorithms? Alternatively, does anyone know if it is possible to build a Delaunay graph with coincident points that has geometric meaning, i.e. preserves the properties we associate with Delaunay graphs? This is really a math question ... Sorry if this is incoherent, it is late and I need to get it off my chest. Eric

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New algorithm for four coloring planar graphs
by Mike Douglass 02 Jun '10

02 Jun '10

I have uploaded the output of my new algorithm (program) for four coloring planar graphs to http://groups.google.com/group/graph_coloring_B1 Go to the files section, download the files, and read README. The program was written in the BGL of course. The algorithm is a very simple alternating chain algorithm with some new ordering features. It works better than you would think. I think those interested in the four coloring of planar graphs will like it. I will upload three other examples probably tomorrow. Thanks

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Boost.Test adding multiple formatter
by Gaurav N Shah 02 Jun '10

02 Jun '10

We can add custom formatter to Boost.Test by: boost::unit_test_log.set_formatter(new Formtter); But What if I want to add more than one formatter?? let's say XML and my own!!! What is the work around to achieve this?? Thank You, Gaurav This communication is for informational purposes only. It is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction. All market prices, data and other information are not warranted as to completeness or accuracy and are subject to change without notice. Any comments or statements made herein do not necessarily reflect those of JPMorgan Chase & Co., its subsidiaries and affiliates. This transmission may contain information that is privileged, confidential, legally privileged, and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. Although this transmission and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by JPMorgan Chase & Co., its subsidiaries and affiliates, as applicable, for any loss or damage arising in any way from its use. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. Please refer to http://www.jpmorgan.com/pages/disclosures for disclosures relating to European legal entities.

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Regarding use of Boost.Test in Iteration.
by Gaurav N Shah 02 Jun '10

02 Jun '10

Hi, I am presently developing a tool to execute a set of test cases after specified time duration (let's say a monitoring tool). Following is the sample code I have written: bool init_test() { boost::unit_test::test_suite* ts1 = BOOST_TEST_SUITE( "test_suite1" ); return false; } TestSuite* testSuite = new TestSuite("TestSuite1"); //TestSuite Class is derived from boost::unit_test::test_suite if (!testSuite->initialize()) { LOG(SDK_ERROR, "Failed to initialize testSuite"); return false; } ts1->add(testSuite); ::boost::framework::master_test_suite().add(ts1); return true; } int main(int argc, char *argv[]) { while (1) { boost::unit_test::unit_test_main(&init_test, argc, argv); ::Sleep(2*60*1000); //wait for 2 mins } } It works fine on first attempt. However, on second term after ::Sleep() is over and program try to register &init_test I get following ERROR: Fail to process runtime parameters: Definition of parameter auto_start_dbg conflicts with defintion of parameter auto_start_dbg Usage: MarketDataCheck.exe [{--auto_start_dbg=|-d }[yes|y|no|n]] [--break_exec_path=<value>] [{--build_info=|-i }[yes|y|no|n]] [{--catch_system_errors=|-s }[ yes|y|no|n]] [--detect_fp_exceptions=[yes|y|no|n]] [--detect_memory_leaks=<value>] [{--log_format=|-f }<value>] [{--log_level=|-l }<value>] [{--output _format=|-o }<value>] [{--random=|-a }[<value>]] [{--report_format=|-m }<value>] [{--report_level=|-r }<value>] [{--result_code=|-c }[yes|y|no|n]] [{- -run_test=|-t }<value>] [--save_pattern=[yes|y|no|n]] [{--show_progress=|-p }[yes|y|no|n]] [--use_alt_stack=[yes|y|no|n]] [{--help=|-? }[yes|y|no|n]] Would you please provide the reason for this error?? If I am not using Boost.Test in correct manner, please suggest any alternative way to use same Boost.Test in iteration mode. (Let me know in case more info is required to debug this problem) Thank You, Gaurav This communication is for informational purposes only. It is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction. All market prices, data and other information are not warranted as to completeness or accuracy and are subject to change without notice. Any comments or statements made herein do not necessarily reflect those of JPMorgan Chase & Co., its subsidiaries and affiliates. This transmission may contain information that is privileged, confidential, legally privileged, and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. Although this transmission and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by JPMorgan Chase & Co., its subsidiaries and affiliates, as applicable, for any loss or damage arising in any way from its use. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. Please refer to http://www.jpmorgan.com/pages/disclosures for disclosures relating to European legal entities.

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[iostreams/filter] problem whilst linking
by Christian Meesters 02 Jun '10

02 Jun '10

Hi, I have the following code (more or less ...) <snip> #include <boost/iostreams/filtering_stream.hpp> #include <boost/iostreams/filter/gzip.hpp> #include <boost/iostreams/copy.hpp> <snip> void function(...) { boost::iostreams::filtering_stream<boost::iostreams::input> inputfile; std::ifstream istream(fname.c_str(), std::ios_base::in | std::ios_base::binary); if (!istream) yamas::ioerror(fname); inputfile.push(boost::iostreams::gzip_decompressor()); inputfile.push(istream); <snip> std::string line; std::getline(inputfile, line); The code is compiling, yet when linking with gcc -o program -static trunk/src/file1.cpp trunk/src/file2.cpp ... -lboost_program_options -lboost_iostreams I get /usr/local/lib/libboost_iostreams.a(zlib.o): In function `boost::iostreams::detail::zlib_base::after(char const*&, char*&, bool)': zlib.cpp:(.text+0x120): undefined reference to `crc32' /usr/local/lib/libboost_iostreams.a(zlib.o): In function `boost::iostreams::detail::zlib_base::do_init(boost::iostreams::zlib_params const&, bool, void* (*)(void*, unsigned int, unsigned int), void (*)(void*, void*), void*)': zlib.cpp:(.text+0x77e): undefined reference to `inflateInit2_' zlib.cpp:(.text+0x7b7): undefined reference to `deflateInit2_' /usr/local/lib/libboost_iostreams.a(zlib.o): In function `boost::iostreams::detail::zlib_base::reset(bool, bool)': zlib.cpp:(.text+0x2d): undefined reference to `deflateReset' zlib.cpp:(.text+0x49): undefined reference to `inflateEnd' zlib.cpp:(.text+0x51): undefined reference to `inflateReset' zlib.cpp:(.text+0x59): undefined reference to `deflateEnd' /usr/local/lib/libboost_iostreams.a(zlib.o): In function `boost::iostreams::detail::zlib_base::xinflate(int)': zlib.cpp:(.text+0x64): undefined reference to `inflate' /usr/local/lib/libboost_iostreams.a(zlib.o): In function `boost::iostreams::detail::zlib_base::xdeflate(int)': zlib.cpp:(.text+0x74): undefined reference to `deflate' collect2: ld returned 1 exit status Any idea what's wrong? What I need to change? Christian PS I tried not to be too verbose, however, if any info is missing, please tell me.

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Program options (1.43.0) problem on Mac OS 10.6: pointer being freed not allocated
by Robert McLay 02 Jun '10

02 Jun '10

I'm using boost 1.43.0. I have enclose a program which uses boost::program_options on a Mac OS 10.6 and when I run it, I get errors. I have compiled boost with g++ version 4.4.1 and version 4.5.0 and I get the same errors. I have tried the version of boost (1.42.0) that comes from macports as well as downloaded version that I have build. clo(87082) malloc: *** error for object 0xa0136db0: pointer being freed was not allocated. The program is given below. I have run the same program with boost 1.43.0 under linux and I don't get any errors. It is also completely clean of any errors when run through valgrind. The program is an example showing problem I'm having. It has been extracted from a larger program. Am I correctly using the library or is there a problem with boost (and only on a Mac?) Thanks for any help. ----------------------------------------------------------------------------------------------------------------------- #include<iostream> #include<string> #include<boost/program_options.hpp> class CmdLineOptions { public: CmdLineOptions(int argc, char* argv[]); bool is_good() {return m_isGood;} public: bool negative; int clustSize; float rebuildRatio; std::string input_file; private: bool m_isGood; }; namespace po = boost::program_options; CmdLineOptions::CmdLineOptions(int argc, char* argv[]) : m_isGood(true) { po::options_description visible("Options"); visible.add_options() ("version,v", "print version string") ("help,h", "produce help message") ("question,?", "produce help message") ("clust_size,s", po::value<int>()->default_value(30), "cluster size") ("rebuild_ratio,r", po::value<float>()->default_value(0.5), "Rebuild ratio") ("negative,n", "Allow negative distances") ; // Hidden options, will be allowed both on command line po::options_description hidden("Hidden options"); hidden.add_options() ("input-file", po::value<std::string>(), "input file") ; po::options_description cmdline_options; cmdline_options.add(visible).add(hidden); po::positional_options_description p; p.add("input-file", -1); po::variables_map vm; store(po::command_line_parser(argc, argv). options(cmdline_options).positional(p).run(), vm); if (vm.count("input-file") == 0 || vm.count("help") || vm.count("question")) { std::cerr<< "\nUsage:\n" << " "<< argv[0]<< " [options] input_file\n\n" << visible<< std::endl; m_isGood = false; return; } clustSize = vm["clust_size"].as<int>(); input_file = vm["input-file"].as<std::string>(); rebuildRatio = vm["rebuild_ratio"].as<float>(); negative = vm.count("negative")> 0; } int main(int argc, char * argv[]) { // Parse Command line options CmdLineOptions cmd(argc, argv); if (! cmd.is_good()) return 1; std::cout<< "clustSize: "<< cmd.clustSize<< " rebuild factor: "<< cmd.rebuildRatio<< "\n"; }

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