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DLL Load Failed
by Monde, John 20 Oct '10

20 Oct '10

Hi, I am having a problem moving my boost python extension to a different machine than my development machine. On my development machine everything works great, I can access my C++ classes through python without any problems but when I copy my .pyd (Python_ext.pyd) to my target machine I get the error "DLL Load failed The specified module could not be found" in my Python program when I attempt to import the .pyd (import Python_ext) I am using Boost_1_42. The .pyd was built using BJAM and my compiler is MSVS 2003 and python26. Python26 is on both the development and the target machine. I had similar problem when I moved my python .pyd extension module to a different directory on my development machine but I fixed that by copying the boost dll boost_python-vc71-mt-gd-1_42.dll to the directory with my .pyd module and it ran great there. I tried to do the same thing on my target machine. I copied my python program, the .pyd extension module and the boost DLL (boost_python-vc71-mt-gd-1_42.dll) to the same directory on my target machine and still get the same error. Both machines are windows XP. To test this I am using a simple test C++ class that just receives two numbers and prints out there sum so I do not believe I am bringing in any other dlls. I am sure this is a simple problem and I am just missing it. Any help would be greatly appreciated. Thanks John

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[spirit::qi] assertion during parsing
by Ovanes Markarian 20 Oct '10

20 Oct '10

Hello *, I have a strange problem. When parsing some output boost::spirit::qi parser aborts the application stating the following error message: /local/include/boost/spirit/home/support/char_encoding/ascii.hpp:256: static int boost::spirit::char_encoding::ascii::isspace(int): Assertion `isascii_(ch)' failed. Indeed my input sequence is: ~B"þ¯Þº~N But is it really a reason to assert the parser and crash the app? This input would not match my grammar, so from my point of view (as library user) it is just fine: not to match the input, without any assertions. And I should be able to decide what to do next. I use boost 1.44 with gcc (GCC) 3.4.6 20060404 (Red Hat 3.4.6-11) Many thanks for support, Ovanes

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How to run boost.Test iteratively?
by Gaurav N Shah 20 Oct '10

20 Oct '10

void test1() { BOOST_CHECK(2 == 1); } bool init_test() { boost::unit_test::test_suite* ts1 = BOOST_TEST_SUITE( "test_suite1" ); ts1->add(BOOST_TEST_CASE(&test1)); ::boost::framework::master_test_suite().add(ts1); return true; } int main(int argc, char* argv[]) { boost::unit_test::unit_test_main(&init_test, argc, argv); //1st attempt sleep(1 mins) boost::unit_test::unit_test_main(&init_test, argc, argv); //2nd attempt } On first attempt test case runs fine. However, on second attempt I get below error: *** 1 failure detected in test suite "Master Test Suite" Test setup error: Fail to process runtime parameters: Definition of parameter auto_start_dbg conflicts with defintion of parameter auto_start_dbg Usage: TestProject.exe [{--auto_start_dbg=|-d }[yes|y|no|n]] [--break_exec_path=<value>] [{--build_info=|-i }[yes|y|no|n]] [{--catch_s ystem_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_l evel=|-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]] Why this occurs and How this can be avoided? 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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[Boost.Spirit] Synthesised attributes and sub-rules
by Vitaly Budovski 20 Oct '10

20 Oct '10

Hi, Please have a look at the code below. I would like to be able to split up the start rule into several sub-rules (currently commented out). The problem is, I'm not sure how to reference the synthesised attribute from the grammar in these sub-rules? Is it possible? I would like to do this so that the grammar is more readable, as the actual rules have a bit more complexity than in this simple example. Thank you, Vitaly ---------------- #include <boost/spirit/home/phoenix/bind/bind_function.hpp> #include <boost/spirit/include/phoenix_core.hpp> #include <boost/spirit/include/phoenix_operator.hpp> #include <boost/spirit/include/qi.hpp> #include <boost/tuple/tuple.hpp> #include <algorithm> #include <iterator> #include <string> #include <vector> using namespace boost::spirit; using namespace boost::spirit::qi; struct a_: qi::symbols<char, int> { a_() { add ("A", 0) ("B", 1) ("C", 2) ; } } a; struct b_: qi::symbols<char, boost::tuple<int, int> > { b_() { add ("x", boost::make_tuple(3, 2)) ("y", boost::make_tuple(4, 0)) ("z", boost::make_tuple(5, 1)) ; } } b; struct c_: qi::symbols<char, int> { c_() { add ("E", 6) ("D", 7) ("J", 8) ; } } c; void insert_a(const int &value, const boost::optional<unsigned int> &count, std::vector<int> &result) { unsigned int c = 1; if(count) { c += *count; } for(unsigned int i = 0; i < c; ++i) { result.push_back(value); } } void insert_b(const boost::tuple<int, int> &value, const boost::optional<unsigned int> &count, std::vector<int> &result) { unsigned int c = 1; if(count) { c += *count; } for(unsigned int i = 0; i < c; ++i) { result.push_back(value.get<0>()); result.push_back(value.get<1>()); } } void insert_c(const int &value, const boost::optional<unsigned int> &count, std::vector<int> &result) { unsigned int c = 1; if(count) { c += *count; } for(unsigned int i = 0; i < c; ++i) { result.push_back(value); } } template<typename Iterator> struct test_grammar: qi::grammar<Iterator, std::vector<int>()> { test_grammar(): test_grammar::base_type(start) { using boost::phoenix::bind; /*a_rule = ( +(a >> -uint_)[bind(insert_a, _1, _2, _val)] ) ; b_rule = ( +(b >> -uint_)[bind(insert_b, _1, _2, _val)] ) ; c_rule = ( +(c >> -uint_)[bind(insert_c, _1, _2, _val)] ) ;*/ start = ( +(a >> -uint_)[bind(insert_a, _1, _2, _val)] | +(b >> -uint_)[bind(insert_b, _1, _2, _val)] | +(c >> -uint_)[bind(insert_c, _1, _2, _val)] ) ; } qi::rule<Iterator> a_rule; qi::rule<Iterator> b_rule; qi::rule<Iterator> c_rule; qi::rule<Iterator, std::vector<int>()> start; }; int main() { std::string s("A3BAC6"); typedef std::string::iterator string_iterator; string_iterator first = s.begin(); string_iterator last = s.end(); typedef test_grammar<string_iterator> test_grammar; test_grammar test_parser; std::vector<int> v; bool result = parse(first, last, test_parser, v); if(result && first == last) { std::copy(v.begin(), v.end(), std::ostream_iterator<int>(std::cout, " ")); std::cout << std::endl; } else { std::cerr << "Failed to parse expression\n"; v.clear(); } std::string s2("xy2z3"); string_iterator first2 = s2.begin(); string_iterator last2 = s2.end(); bool result2 = parse(first2, last2, test_parser, v); if(result2 && first2 == last2) { std::copy(v.begin(), v.end(), std::ostream_iterator<int>(std::cout, " ")); std::cout << std::endl; } else { std::cerr << "Failed to parse expression\n"; v.clear(); } std::string s3("EDJ"); string_iterator first3 = s3.begin(); string_iterator last3 = s3.end(); bool result3 = parse(first3, last3, test_parser, v); if(result3 && first3 == last3) { std::copy(v.begin(), v.end(), std::ostream_iterator<int>(std::cout, " ")); std::cout << std::endl; } else { std::cerr << "Failed to parse expression\n"; v.clear(); } return 0; }

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boost.MPI dynamic data structure error
by Jack Bryan 20 Oct '10

20 Oct '10

Hi , I need to design a data structure to transfer data between nodes by boost.MPI. Some elements of the the structure has dynamic size. For example, typedef struct{ double data1;vector<double> dataVec; } myDataType; The size of the dataVec depends on some intermidiate computing results. If I only declear it as the above myDataType, I think, only a pointer is transfered. When the data receiver try to access the elements of vector<double> dataVec, it got segmentation fault error. But, I also need to use the myDataType to declear other data structures. such as vector<myDataType> newDataVec; I cannot declear myDataType in a function , sucjh as main(), I got errors: main.cpp:200: error: main(int, char**)::myDataType; uses local type main(int, char**)::myDataType; Any help is really appreciated. thanks Jack Oct. 19 2010

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Question about Boost License and commercial software
by marc_elias＠terra.es 20 Oct '10

20 Oct '10

Hi, I'm working in a company that want to use boost libraries to a commercial software. I have a pair of questions: 1. Is it possible to distribute under the boost license a commercial software (so the source code won't be exposed) programmed with static boost libraries? 2. And with linked libraries to an executable? Thanks in advance! MARC

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[Regex] This pattern compiles fine for Perl and PCRE but not for Boost Regex
by David Dawe 20 Oct '10

20 Oct '10

Boost Regex fails to compile a regular expression such as "{abc}" with the error "Invalid content of repeat range". However, both Perl and PCRE accept the regular expression, treating the "{" as a literal character. The PCRE man page at http://www.pcre.org/pcre.txt clearly states: An opening curly bracket that appears in a position where a quantifier is not allowed, or one that does not match the syntax of a quantifier, is taken as a literal character. The Perl regular expression man page at http://perldoc.perl.org/perlre.html is similar, though not quite as clear: If a curly bracket occurs in any other context, it is treated as a regular character. In particular, the lower bound is not optional. Nevertheless, the behaviour of both PCRE and Perl are the same. I am currently using Boost 1.39, but I have seen no mention of a change in this area for more recent versions of Boost Regex. And finally ... my question ... Is there a way in Boost Regex to interpret a "{" as a literal character in the above context in a Perl regular expression, while still allowing the "{n,m}" bounded repeat in places where it is syntactically valid? Thanks.

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boost::thread_resource_error
by Julien Martin 19 Oct '10

19 Oct '10

Hello, I am encountering the following error: ********************************** terminate called after throwing an instance of 'boost::thread_resource_error' what(): boost::thread_resource_error Abandon ********************************** trying to run a threadgroup of 500 threads as follows: thread_group * thgrp = new thread_group(); for (int i = 0; i < NUMTHREADS; i++) { thgrp->create_thread(bind(&simulate, i, 100, 0.05, 0.2, 1.0, 100, 100, endPrices)); } thgrp->join_all(); Can anyone please help. I don't understand why I get this error as I have no resource problems with my machine. Julien.

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dynamic_bitset: request to add find_last() function
by Hicham Mouline 19 Oct '10

19 Oct '10

Hello As there is a find_first() function, is there a way to get a find_last() which returns the index of the most significant bit that is on? Regards,

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[boost] [serialization] Braking change with BOOST_CLASS_EXPORT
by petke himself 19 Oct '10

19 Oct '10

Hi, I noticed a breaking change / bug with boost serialization. (I hope this is the right mailinglist for bug reports) Upgrading from boost-1.35.0 to boost_1_44_0.. and I got compilation errors with the BOOST_CLASS_EXPORT macro. I did not write the user code so i dont know anything about the library, but it turns out BOOST_CLASS_EXPORT was called from inside several user namespaces. This meant the macro would try and specialize the template 'somens1::somens2::somens3::boost::serialization::guid_defined', which obviously does not exist. Placing the BOOST_CLASS_EXPORT macro outside of any user namespace solved the compile error. Im not sure why this worked in the old version of boost. But maybe it would be an idea to change the BOOST_CLASS_EXPORT macro, if possible, so that it jumps back into the root namespace. Should be as simple as replacing any "boost::serialization" with "::boost::serialization", right? The error message on VS2008 was: [exec] 1>xxx.h(67) : error C2143: syntax error : missing ';' before '<' [exec] 1>xxx.h(67) : error C2913: explicit specialization; 'somens1::somens2::somens3::boost::serialization::guid_defined' is not a specialization of a class template [exec] 1>xxx.h(67) : error C2059: syntax error : '<' [exec] 1>xxx.h(67) : error C3083: 'mpl': the symbol to the left of a '::' must be a type [exec] 1>xxx.h(67) : error C2039: 'true_' : is not a member of 'somens1::somens2::somens3::boost' [exec] 1>xxx.h(67) : error C2470: 'true_' : looks like a function definition, but there is no parameter list; skipping apparent body [exec] 1>xxx.h(67) : fatal error C1903: unable to recover from previous error(s); stopping compilation Regards, Patrik

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