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boost logging from shared libraries
by Austin Bingham 22 Aug '05

22 Aug '05

First, I wasn't sure where would be the most appropriate place to post this question, so I apologize if it's gone to the wrong place. I'm trying to figure out how to put logging statements in some shared libraries which are then controlled via manipulate_logs() calls an the executable that uses the libraries. It appears, after some rudimentary experiments, that this does not work, and I was hoping to find out if there is a way to do it. The logging system, of course, does log manipulation using log names and regular expression matching. As such, I assumed that logs were statically allocated and, in some way, all registered with some central registry which made them all available via their names. Stepping through logging calls in the libraries seems to indicate that logging code is being accessed and, as far as I can tell, the logs are "enabled" and, in fact, trying to log messages (to cout, for what it's worth). However, I don't see anything printed except for log messages genereted from the executable's source code. So, is what I'm trying to do even feasible? I would love to be able to have diagnostics built into my libraries which I could dis/enable as necessary from the executive level. Hopefully I'm just missing something simple. Thanks. -- Austin Bingham "If I were creating the world I wouldn't mess about with butterflies and daffodils. I would have started with lasers, eight o'clock, Day One!" Evil

2 4

XML-Serialization_Problem with loading: Debug output
by p.speck＠ewersbach.net 22 Aug '05

22 Aug '05

#0 0x4013383b in raise () from /lib/tls/libc.so.6 #1 0x40134fa2 in abort () from /lib/tls/libc.so.6 #2 0x400b6f57 in __cxa_call_unexpected () from /usr/lib/libstdc++.so.5 #3 0x400b6f94 in std::terminate () from /usr/lib/libstdc++.so.5 #4 0x400b7106 in __cxa_throw () from /usr/lib/libstdc++.so.5 #5 0x0805d1a3 in boost::archive::basic_xml_iarchive<boost::archive::xml_iarchive>::load_start () #6 0x0804d34b in boost::archive::basic_xml_iarchive<boost::archive::xml_iarchive>::load_override<CFixture> () #7 0x0804d328 in boost::archive::xml_iarchive_impl<boost::archive::xml_iarchive>::load_override<boost::serialization::nvp<CFixture> > () #8 0x0804cb08 in boost::archive::detail::interface_iarchive<boost::archive::xml_iarchive>::operator>><boost::serialization::nvp<CFixture> > () #9 0x0804bf05 in load () #10 0x0804bac4 in main ()

1 0

MPL: Creating a vector of vector_c's from a vector_c
by Pascal Bauer 22 Aug '05

22 Aug '05

Hello, I have the following problem: Given typedef mpl::vector_c<int, 3, 0, 3, 6, 9> MyVector; Now, I wish to create a mpl::vector with 3 entries that look like mpl::vector< mpl::vector_c<int, 1, 0, 3, 6, 9>, mpl::vector_c<int, 1, 1, 4, 7, 10>, mpl::vector_c<int, 1, 2, 5, 8, 11> > In words The first number in MyVector gives me the number of resulting vector_c types. the resulting types should contain a 1 instead of that number. The other numbers should be replace gradualy: The first vector_c should contain the same numbers as the original type. In the second vector_c, all the numbers should be incremented by one, and so forth. I have to admit, that this task overstrains me, so it would be very kind, if someone could help me to figure this out. Cheers Pascal Bauer -- ************************************ * Pascal Bauer * * * * Theoretical Astrophysics Group * * Mail: pascal.bauer(a)phim.unibe.ch * ************************************

1 0

[date_time] timezone bug for boost::posix_time::microsec_clock::local_time()
by Brendon Costa 22 Aug '05

22 Aug '05

Hi, I have noticed that there seems to be a problem with the boost date_time library 1.33 (Downloaded about 2 days ago) when trying to use the localtime information under a NetBSD system. Specifically when I have a small test program: #include "boost/date_time/posix_time/posix_time.hpp" #include "boost/date_time/c_local_time_adjustor.hpp" #include <iostream> int main() { using namespace boost::posix_time; ptime loc = microsec_clock::local_time(); ptime utc = microsec_clock::universal_time(); std::cout << "Local: " << to_simple_string(loc) << std::endl; std::cout << "UTC: " << to_simple_string(utc) << std::endl; std::cout << "Local again: " << to_simple_string( boost::date_time::c_local_adjustor<ptime>::utc_to_local(utc)) << std::endl; return 0; } It will display the same time for both UTC time and Local time (Living in Melbourn Australia) where I expected them to differ. I found that the above program would fail unless I did the following: #include "boost/date_time/posix_time/posix_time.hpp" #include "boost/date_time/c_local_time_adjustor.hpp" #include <iostream> int main() { using namespace boost::posix_time; tzset(); ptime loc = microsec_clock::local_time(); ptime utc = microsec_clock::universal_time(); std::cout << "Local: " << to_simple_string(loc) << std::endl; std::cout << "UTC: " << to_simple_string(utc) << std::endl; std::cout << "Local again: " << to_simple_string( boost::date_time::c_local_adjustor<ptime>::utc_to_local(utc)) << std::endl; return 0; } Thanks, Brendon Costa.

2 3

[serialization] dynamic arrays of chars
by Ivan 21 Aug '05

21 Aug '05

I have a parser and there is one big object that holds the whole file being parsed as a dynamic array class File { public char * ptr; }; File file; file.ptr = new char[very_big_number_like_100000]; The parser creates a lot of objects that keep pointers into this dynamic array. class A { char* internalPtr1; }; class B { char* internalPtr2; }; class C { char* internalPtr3; }; A a; B b; C c; a.internalPtr1 = file.ptr + 234; b.internalPtr2 = file.ptr + 10673; c.internalPtr3 = file.ptr + 9583; How could I serialize the file object and these numerous small objects? I could write separate save/load for each of these A, B, C and so on but I'll need access to File::ptr inside the save/load funcs and this would be an ugly solution. Any ideas?

2 2

How do I convince bjam to build multi-threaded libraries?
by Andrew Schweitzer 21 Aug '05

21 Aug '05

I'm not getting the "=mt" version of the library I'm building. When I run bjam, it just doesn't build the "-mt" versions. I *think* it did in the past, I just don't know how I convinced it to do so. A cursory look at the "getting started" page didn't reveal the answer. Do I just need to look more closely? Any pointers appreciated. Here's what I do: Download windows bjam.exe to boost directory. open command prompt. cd to libs\log\build call vcvars32.bat call ..\..\..\bjam Thanks Andrew

4 3

lambda vs string concatenation
by jll＠soundobjectlogic.com 21 Aug '05

21 Aug '05

Hello, I'm just discovering Boost, and it looks great. However, I can't get the following code to work. I use g++ (GCC) 3.4.4 20050721 and boost 1.32 (also tried 1.33). When I try a similar example with mere integers it works though... #include <string> #include <sstream> #include <iterator> #include <vector> #include <boost/lambda/bind.hpp> #include <boost/lambda/lambda.hpp> using namespace std; using namespace boost::lambda; int main() { vector<string> cols; cols.push_back("foo"); string prefix = "t1."; for_each(cols.begin(), cols.end(), _1 = prefix + _1); cout << cols.front() << endl; return 0; } g++ t.cpp && ./a.out /usr/include/boost/lambda/detail/operator_lambda_func_base.hpp: In member function `RET boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::assignment_action>, Args>::call(A&, B&, C&, Env&) const [with RET = std::basic_string<char, std::char_traits<char>, std::allocator<char> >&, A = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, B = const boost::tuples::null_type, C = const boost::tuples::null_type, Env = const boost::tuples::null_type, Args = boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]': /usr/include/boost/lambda/detail/lambda_functors.hpp:146: instantiated from `typename T::sig<boost::tuples::tuple<A&, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >::type boost::lambda::lambda_functor<Base>::operator()(A&) const [with A = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, T = boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::assignment_action>, boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >]' /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/stl_algo.h:158: instantiated from `_Function std::for_each(_InputIterator, _InputIterator, _Function) [with _InputIterator = __gnu_cxx::__normal_iterator<std::string*, std::vector<std::string, std::allocator<std::string> > >, _Function = boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::assignment_action>, boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >]' t.cpp:16: instantiated from here /usr/include/boost/lambda/detail/operator_lambda_func_base.hpp:237: error: no match for 'operator=' in 'boost::lambda::detail::select [with Arg = boost::lambda::placeholder<1>, A = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, B = const boost::tuples::null_type, C = const boost::tuples::null_type, Env = const boost::tuples::null_type](((const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >&)(+boost::tuples::get [with int N = 0, HT = boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, TT = boost::tuples::cons<boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, boost::tuples::null_type>](((const boost::tuples::cons<boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::cons<boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, boost::tuples::null_type> >&)((const boost::tuples::cons<boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::cons<boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, boost::tuples::null_type> >*)((const boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>*)this)))))), ((std::basic_string<char, std::char_traits<char>, std::allocator<char> >&)(+a)), ((const boost::tuples::null_type&)(+b)), ((const boost::tuples::null_type&)(+c)), ((const boost::tuples::null_type&)(+env))) = boost::lambda::detail::select [with Arg = boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >, A = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, B = const boost::tuples::null_type, C = const boost::tuples::null_type, Env = const boost::tuples::null_type](((const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >&)(+boost::tuples::get [with int N = 1, HT = boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, TT = boost::tuples::cons<boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, boost::tuples::null_type>](((const boost::tuples::cons<boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::cons<boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, boost::tuples::null_type> >&)((const boost::tuples::cons<boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::cons<boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, boost::tuples::null_type> >*)((const boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>*)this)))))), ((std::basic_string<char, std::char_traits<char>, std::allocator<char> >&)(+a)), ((const boost::tuples::null_type&)(+b)), ((const boost::tuples::null_type&)(+c)), ((const boost::tuples::null_type&)(+env)))' /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/basic_string.h:426: note: candidates are: std::basic_string<_CharT, _Traits, _Alloc>& std::basic_string<_CharT, _Traits, _Alloc>::operator=(const std::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::allocator<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/basic_string.h:437: note: std::basic_string<_CharT, _Traits, _Alloc>& std::basic_string<_CharT, _Traits, _Alloc>::operator=(const _CharT*) [with _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::allocator<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/basic_string.h:451: note: std::basic_string<_CharT, _Traits, _Alloc>& std::basic_string<_CharT, _Traits, _Alloc>::operator=(_CharT) [with _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::allocator<char>] /usr/include/boost/lambda/detail/operator_lambda_func_base.hpp: In member function `RET boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, Args>::call(A&, B&, C&, Env&) const [with RET = boost::lambda::detail::return_type_deduction_failure<boost::lambda::detail::return_type_2_arithmetic_phase_3<std::string, std::string> >, A = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, B = const boost::tuples::null_type, C = const boost::tuples::null_type, Env = const boost::tuples::null_type, Args = boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]': /usr/include/boost/lambda/detail/select_functions.hpp:28: instantiated from `typename Arg::sig<boost::tuples::tuple<A&, B&, C&, Env&, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >::type boost::lambda::detail::select(const boost::lambda::lambda_functor<T>&, A&, B&, C&, Env&) [with Arg = boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >, A = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, B = const boost::tuples::null_type, C = const boost::tuples::null_type, Env = const boost::tuples::null_type]' /usr/include/boost/lambda/detail/operator_lambda_func_base.hpp:237: instantiated from `RET boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::assignment_action>, Args>::call(A&, B&, C&, Env&) const [with RET = std::basic_string<char, std::char_traits<char>, std::allocator<char> >&, A = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, B = const boost::tuples::null_type, C = const boost::tuples::null_type, Env = const boost::tuples::null_type, Args = boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]' /usr/include/boost/lambda/detail/lambda_functors.hpp:146: instantiated from `typename T::sig<boost::tuples::tuple<A&, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >::type boost::lambda::lambda_functor<Base>::operator()(A&) const [with A = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, T = boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::assignment_action>, boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >]' /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/stl_algo.h:158: instantiated from `_Function std::for_each(_InputIterator, _InputIterator, _Function) [with _InputIterator = __gnu_cxx::__normal_iterator<std::string*, std::vector<std::string, std::allocator<std::string> > >, _Function = boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::assignment_action>, boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::arithmetic_action<boost::lambda::plus_action>, boost::tuples::tuple<const std::string, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >]' t.cpp:16: instantiated from here /usr/include/boost/lambda/detail/operator_lambda_func_base.hpp:206: error: conversion from `std::basic_string<char, std::char_traits<char>, std::allocator<char> >' to non-scalar type `boost::lambda::detail::return_type_deduction_failure<boost::lambda::detail::return_type_2_arithmetic_phase_3<std::string, std::string> >' requested -- Jean-Louis Leroy Sound Object Logic http://www.soundobjectlogic.com

2 1

some bug in hash library of boost 1.33
by 沈慧峰 20 Aug '05

20 Aug '05

example points.cpp has a big bug leads to can not compile line 23 error : return x = other.x && y == other.y; The correct code must be : return x == other.x && y == other.y;

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boost::program_options endless-loop ?
by Leon Mergen 20 Aug '05

20 Aug '05

Hello, I'm trying to integrate the boost::program_options library into my application, but am running into some strange problems. For some reason, when calling the boost::program_options::store() function, the program enters an endless loop running processor usage too 100%. I've created a test-case which generates this error for me (see attachment). This is the output of the application: ======================================================================= lmergen@solatis3:~/Projects/Tsukku Client/src2 $ ./TsukkuNode 1 2 3 4 5 6 ======================================================================= And here it enters the endless loop. When I lookup the process id and do a kill -11 to easily generate a core dump, it looks like it's messing around with mutexes: ======================================================================= #0 0xffffe410 in __kernel_vsyscall () #1 0xb7d6325b in __lll_mutex_lock_wait () from /lib/tls/i686/cmov/libpthread.so.0 #2 0xb7d60690 in _L_mutex_lock_26 () from /lib/tls/i686/cmov/libpthread.so.0 #3 0xbffff598 in ?? () #4 0xb7ff6730 in _dl_map_object_deps () from /lib/ld-linux.so.2 #5 0x080604dd in scoped_lock (this=0x80b4bc4, m=@0x1) at lwm_pthreads.hpp:72 #6 0x080604dd in scoped_lock (this=0xbffff5c0, m=@0x80b4bc4) at lwm_pthreads.hpp:72 #7 0x0805faed in boost::detail::sp_counted_base::release (this=0x80b4bb8) at shared_count.hpp:140 #8 0x0805f0c7 in ~shared_count (this=0xbffff6a4) at shared_count.hpp:378 #9 0xb7f0e700 in boost::program_options::common_command_line_parser::run () from /usr/lib/libboost_program_options-gcc-1_32.so.1.32.0 #10 0x0805d969 in boost::program_options::basic_command_line_parser<char>::run (this=0xbffff7d0) at parsers.hpp:84 #11 0x0805d8b3 in boost::program_options::parse_command_line<char> (argc=1, argv=0xbffffa94, desc=@0xbffff9c0, style=0, ext=Cannot access memory at address 0xfffffff5 ) at parsers.hpp:97 #12 0x0805d514 in main (argc=1, argv=0xbffffa94) at Main.cpp:28 ======================================================================= Line number 28 at Main.cpp is "boost::program_options::store ( boost::program_options::parse_command_line ( argc, argv, desc ), vm );". I've tested this, and it does the same when parsing the config file before the command line. Anyone has any idea what's causing this problem ? Thanks in advance! Regards, Leon Mergen

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[1.33.0][date_time] Weird warning
by Paul 20 Aug '05

20 Aug '05

I got the following warning while compiling with (debian-testing) g++ 4.0.1-2 I couldn't see the problem in the code? /usr/local/include/boost-1_33/boost/date_time/time_duration.hpp: In function 'time_duration boost::date_time::parse_undelimited_time_duration(const std::string&) [with time_duration = boost::posix_time::time_duration]': /usr/local/include/boost-1_33/boost/date_time/time_duration.hpp:58: warning: control may reach end of non-void function 'static typename frac_sec_type::int_type boost::date_time::time_resolution_traits<frac_sec_type, res, resolution_adjust, frac_digits, v_type>::to_tick_count(v_type, v_type, v_type, typename frac_sec_type::int_type) [with frac_sec_type = boost::date_time::time_resolution_traits_adapted64_impl, boost::date_time::time_resolutions res = micro, typename frac_sec_type::int_type resolution_adjust = 1000000, short unsigned int frac_digits = 6u, v_type = int32_t]' being inlined Just a bit concerned, I don't like warnings :) Paul

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