- Boost-users - lists.boost.org

inconvenient for boost::thread::sleep
by RocWood 04 Oct '05

04 Oct '05

boost::thread::sleep, IMHO, it's too inconvenient. I get these example code to sleep 1 second, { boost::xtime xt; boost::xtime_get(&xt, boost::TIME_UTC); xt.sec += 1; // change xt to next second boost::thread::sleep(xt); } and, only 1 line in another platform(origianl plaform or java) { sleep(1000); } hmmm... Too inconvenient, and, to make things worse, quite a heavy calling. Is there any suggestion for me? Thanks.

4 3

Status of logging library
by Austin Bingham 03 Oct '05

03 Oct '05

Does anyone know what the status of John Torjo's logging library is? I've noticed that it's "in the review queue". Does this indicate that it's largely just a matter of time before it's ratified? If so, how long might this matter of time be? 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 1

[wave] Error when parsing files from ACE (Adaptive Communication Environment)
by Yariv Tal 03 Oct '05

03 Oct '05

Hi. I use the ACE library (http://www.cs.wustl.edu/~schmidt/ACE.html) which is known for being highly portable. When using wave to pre-process my code, which includes files from the ACE lib, wave fails on the following code snippet: -------------snippet------------------- // The number of bytes in a short. # if !defined (ACE_SIZEOF_SHORT) # if (USHRT_MAX) == 255U # define ACE_SIZEOF_SHORT 1 # elif (USHRT_MAX) == 65535U # define ACE_SIZEOF_SHORT 2 # elif (USHRT_MAX) == 4294967295U # define ACE_SIZEOF_SHORT 4 # elif (USHRT_MAX) == 18446744073709551615U <===[fails here] # define ACE_SIZEOF_SHORT 8 # else # error: unsupported short size, must be updated for this platform! # endif /* USHRT_MAX */ # endif /* !defined (ACE_SIZEOF_SHORT) */ -------------end snippet------------------- Note: USHRT_MAX is defined as 0xffff The failure occurs at the designated line, due to an ill-formed number. I suppose that the number is just too big, but shouldn't the comparison never even be "reached"? (since the previous elif would have been true) I am not too familiar with the standard, so I don't know if emitting an error for this case is correct, but my intuition is that even if this is not standard conforming, there should at least be a flag allowing this, since I assume (if it is used in such a highly portable library) that it _IS_ supported by most preprocessors out there. Apart from that, great lib! I just started using it, but I already love it. Yariv Tal.

2 1

newbie question: Boost graph library and GraphViz
by John Pye 03 Oct '05

03 Oct '05

Hi there, I've been working on using Boost Graph Library for the last few days and I've got to the point where I can't go further without some help. What I've got is an algorithm that I've implemented that works fine except for the part that involves 'remove_vertex'. Using this function wrecks my graph, for reasons that I understand (Iterator and Descriptor Stability/Invalidation, at http://www.boost.org/libs/graph/doc/adjacency_list.html) So, following the advice there, I switched from a vecS graph to a listS graph, with the following typedef: * *typedef boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, VertexData, EdgeData> Graph; When I do that, my algorithm seems to work OK but I can no longer view the results using the write_graphviz function -- I get a string of errors about some problem with the operator<< inside graphviz.hpp header. I'll paste in the errors at the end. The only thing I can see being the problem is that I'm using an AdjacencyGraph, and that doesn't include the VertexListGraph concept, which presumably is required for write_graphviz. How can I make write_graphviz run again with this new type of Graph? Happy to give some more info/code if that helps. Any suggestions would be very much appreciated! Cheers JP Here are the error messages: > g++ -O3 -Wall -ggdb -I../nnes -c -o westerberg.o westerberg.cpp > /usr/include/boost/graph/graphviz.hpp: In function `void > boost::write_graphviz(std::ostream&, const Graph&, > VertexPropertiesWriter, EdgePropertiesWriter, GraphPropertiesWriter) > [with Graph = boost::adjacency_list<boost::listS, boost::listS, > boost::bidirectionalS, Westerberg::VertexData, Westerberg::EdgeData, > boost::no_property, boost::listS>, VertexPropertiesWriter = > WesterbergPropertiesWriter, EdgePropertiesWriter = > WesterbergPropertiesWriter, GraphPropertiesWriter = > WesterbergPropertiesWriter]': westerberg.cpp:118: instantiated from > here /usr/include/boost/graph/graphviz.hpp:263: error: no match for > 'operator<<' in 'out << boost::get [with PropertyMap = > boost::adj_list_vertex_property_map<boost::adjacency_list<boost::listS, > boost::listS, boost::bidirectionalS, Westerberg::VertexData, > Westerberg::EdgeData, boost::no_property, boost::listS>, > boost::detail::error_property_not_found, const > boost::detail::error_property_not_found&, boost::vertex_index_t>, > Reference = const boost::detail::error_property_not_found&, K = > void*](((const boost::put_get_helper<const > boost::detail::error_property_not_found&, > boost::adj_list_vertex_property_map<boost::adjacency_list<boost::listS, > boost::listS, boost::bidirectionalS, Westerberg::VertexData, > Westerberg::EdgeData, boost::no_property, boost::listS>, > boost::detail::error_property_not_found, const > boost::detail::error_property_not_found&, boost::vertex_index_t> > >&)((const boost::put_get_helper<const > boost::detail::error_property_not_found&, > boost::adj_list_vertex_property_map<boost::adjacency_list<boost::listS, > boost::listS, boost::bidirectionalS, Westerberg::VertexData, > Westerberg::EdgeData, boost::no_property, boost::listS>, > boost::detail::error_property_not_found, const > boost::detail::error_property_not_found&, boost::vertex_index_t> > >*)((boost::put_get_helper<const > boost::detail::error_property_not_found&, > boost::adj_list_vertex_property_map<boost::adjacency_list<boost::listS, > boost::listS, boost::bidirectionalS, Westerberg::VertexData, > Westerberg::EdgeData, boost::no_property, boost::listS>, > boost::detail::error_property_not_found, const > boost::detail::error_property_not_found&, boost::vertex_index_t> > >*)(&vertex_index)))), ((void* const&)((void* > const*)(+(&i)->std::_List_iterator<_Tp>::operator* [with _Tp = > void*]()))))' > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:63: > note: candidates are: std::basic_ostream<_CharT, _Traits>& > std::basic_ostream<_CharT, > _Traits>::operator<<(std::basic_ostream<_CharT, > _Traits>&(*)(std::basic_ostream<_CharT, _Traits>&)) [with _CharT = > char, _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:74: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(std::basic_ios<_CharT, > _Traits>&(*)(std::basic_ios<_CharT, _Traits>&)) [with _CharT = char, > _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:86: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(std::ios_base&(*)(std::ios_base&)) [with _CharT = > char, _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:121: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(long int) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:155: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(long unsigned int) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:98: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(bool) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:178: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(short int) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:189: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(short unsigned int) [with _CharT = char, _Traits > = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:193: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(int) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:204: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(unsigned int) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:179: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(long long int) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:214: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(long long unsigned int) [with _CharT = char, > _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:238: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(double) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:219: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(float) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:261: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(long double) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:284: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(const void*) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:307: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(std::basic_streambuf<_CharT, _Traits>*) [with > _CharT = char, _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:449: > note: std::basic_ostream<_CharT, _Traits>& > std::operator<<(std::basic_ostream<_CharT, _Traits>&, char) [with > _CharT = char, _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:505: > note: std::basic_ostream<char, _Traits>& > std::operator<<(std::basic_ostream<char, _Traits>&, char) [with > _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:460: > note: std::basic_ostream<char, _Traits>& > std::operator<<(std::basic_ostream<char, _Traits>&, signed char) [with > _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:465: > note: std::basic_ostream<char, _Traits>& > std::operator<<(std::basic_ostream<char, _Traits>&, unsigned char) > [with _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:567: > note: std::basic_ostream<_CharT, _Traits>& > std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*) > [with _CharT = char, _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:612: > note: std::basic_ostream<char, _Traits>& > std::operator<<(std::basic_ostream<char, _Traits>&, const char*) [with > _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:499: > note: std::basic_ostream<char, _Traits>& > std::operator<<(std::basic_ostream<char, _Traits>&, const signed > char*) [with _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:504: > note: std::basic_ostream<char, _Traits>& > std::operator<<(std::basic_ostream<char, _Traits>&, const unsigned > char*) [with _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/iomanip:82: > note: std::basic_ostream<_CharT, _Traits>& > std::operator<<(std::basic_ostream<_CharT, _Traits>&, > std::_Resetiosflags) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/iomanip:116: > note: std::basic_ostream<_CharT, _Traits>& > std::operator<<(std::basic_ostream<_CharT, _Traits>&, > std::_Setiosflags) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/iomanip:154: > note: std::basic_ostream<_CharT, _Traits>& > std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setbase) > [with _CharT = char, _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/iomanip:227: > note: std::basic_ostream<_CharT, _Traits>& > std::operator<<(std::basic_ostream<_CharT, _Traits>&, > std::_Setprecision) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/iomanip:261: > note: std::basic_ostream<_CharT, _Traits>& > std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setw) > [with _CharT = char, _Traits = std::char_traits<char>] > westerberg.cpp:118: instantiated from here > /usr/include/boost/graph/graphviz.hpp:269: error: no match for > 'operator<<' in 'out << boost::get [with PropertyMap = > boost::adj_list_vertex_property_map<boost::adjacency_list<boost::listS, > boost::listS, boost::bidirectionalS, Westerberg::VertexData, > Westerberg::EdgeData, boost::no_property, boost::listS>, > boost::detail::error_property_not_found, const > boost::detail::error_property_not_found&, boost::vertex_index_t>, > Reference = const boost::detail::error_property_not_found&, K = > void*](((const boost::put_get_helper<const > boost::detail::error_property_not_found&, > boost::adj_list_vertex_property_map<boost::adjacency_list<boost::listS, > boost::listS, boost::bidirectionalS, Westerberg::VertexData, > Westerberg::EdgeData, boost::no_property, boost::listS>, > boost::detail::error_property_not_found, const > boost::detail::error_property_not_found&, boost::vertex_index_t> > >&)((const boost::put_get_helper<const > boost::detail::error_property_not_found&, > boost::adj_list_vertex_property_map<boost::adjacency_list<boost::listS, > boost::listS, boost::bidirectionalS, Westerberg::VertexData, > Westerberg::EdgeData, boost::no_property, boost::listS>, > boost::detail::error_property_not_found, const > boost::detail::error_property_not_found&, boost::vertex_index_t> > >*)((boost::put_get_helper<const > boost::detail::error_property_not_found&, > boost::adj_list_vertex_property_map<boost::adjacency_list<boost::listS, > boost::listS, boost::bidirectionalS, Westerberg::VertexData, > Westerberg::EdgeData, boost::no_property, boost::listS>, > boost::detail::error_property_not_found, const > boost::detail::error_property_not_found&, boost::vertex_index_t> > >*)(&vertex_index)))), ((void* const&)((void* const*)(&boost::source > [with Directed = boost::bidirectional_tag, Vertex = void*, > OutEdgeListS = boost::listS, VertexListS = boost::listS, DirectedS = > boost::bidirectionalS, VertexProperty = Westerberg::VertexData, > EdgeProperty = Westerberg::EdgeData, GraphProperty = > boost::no_property, EdgeListS = boost::listS](((const > boost::detail::edge_base<boost::bidirectional_tag, void*>&)((const > boost::detail::edge_base<boost::bidirectional_tag, > void*>*)((boost::detail::edge_base<boost::bidirectional_tag, > void*>*)(&((boost::iterator_facade<boost::detail::undirected_edge_iter<std::_List_iterator<boost::list_edge<void*, > boost::property<boost::edge_bundle_t, Westerberg::EdgeData, > boost::no_property> > >, > boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, > ptrdiff_t>, boost::detail::edge_desc_impl<boost::bidirectional_tag, > void*>, boost::bidirectional_traversal_tag, > boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, > ptrdiff_t>*)(&ei))->boost::iterator_facade<I, V, TC, R, D>::operator* > [with Derived = > boost::detail::undirected_edge_iter<std::_List_iterator<boost::list_edge<void*, > boost::property<boost::edge_bundle_t, Westerberg::EdgeData, > boost::no_property> > >, > boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, > ptrdiff_t>, Value = > boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, > CategoryOrTraversal = boost::bidirectional_traversal_tag, Reference = > boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, > Difference = ptrdiff_t]())))), ((const > boost::adjacency_list<boost::listS, boost::listS, > boost::bidirectionalS, Westerberg::VertexData, Westerberg::EdgeData, > boost::no_property, boost::listS>&)(+g)))))))' > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:63: > note: candidates are: std::basic_ostream<_CharT, _Traits>& > std::basic_ostream<_CharT, > _Traits>::operator<<(std::basic_ostream<_CharT, > _Traits>&(*)(std::basic_ostream<_CharT, _Traits>&)) [with _CharT = > char, _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:74: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(std::basic_ios<_CharT, > _Traits>&(*)(std::basic_ios<_CharT, _Traits>&)) [with _CharT = char, > _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:86: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(std::ios_base&(*)(std::ios_base&)) [with _CharT = > char, _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:121: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(long int) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:155: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(long unsigned int) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:98: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(bool) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:178: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(short int) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:189: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(short unsigned int) [with _CharT = char, _Traits > = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:193: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(int) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:204: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(unsigned int) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:179: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(long long int) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:214: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(long long unsigned int) [with _CharT = char, > _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:238: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(double) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:219: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(float) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:261: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(long double) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:284: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(const void*) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:307: > note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, > _Traits>::operator<<(std::basic_streambuf<_CharT, _Traits>*) [with > _CharT = char, _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:449: > note: std::basic_ostream<_CharT, _Traits>& > std::operator<<(std::basic_ostream<_CharT, _Traits>&, char) [with > _CharT = char, _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:505: > note: std::basic_ostream<char, _Traits>& > std::operator<<(std::basic_ostream<char, _Traits>&, char) [with > _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:460: > note: std::basic_ostream<char, _Traits>& > std::operator<<(std::basic_ostream<char, _Traits>&, signed char) [with > _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:465: > note: std::basic_ostream<char, _Traits>& > std::operator<<(std::basic_ostream<char, _Traits>&, unsigned char) > [with _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:567: > note: std::basic_ostream<_CharT, _Traits>& > std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*) > [with _CharT = char, _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:612: > note: std::basic_ostream<char, _Traits>& > std::operator<<(std::basic_ostream<char, _Traits>&, const char*) [with > _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:499: > note: std::basic_ostream<char, _Traits>& > std::operator<<(std::basic_ostream<char, _Traits>&, const signed > char*) [with _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:504: > note: std::basic_ostream<char, _Traits>& > std::operator<<(std::basic_ostream<char, _Traits>&, const unsigned > char*) [with _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/iomanip:82: > note: std::basic_ostream<_CharT, _Traits>& > std::operator<<(std::basic_ostream<_CharT, _Traits>&, > std::_Resetiosflags) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/iomanip:116: > note: std::basic_ostream<_CharT, _Traits>& > std::operator<<(std::basic_ostream<_CharT, _Traits>&, > std::_Setiosflags) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/iomanip:154: > note: std::basic_ostream<_CharT, _Traits>& > std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setbase) > [with _CharT = char, _Traits = std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/iomanip:227: > note: std::basic_ostream<_CharT, _Traits>& > std::operator<<(std::basic_ostream<_CharT, _Traits>&, > std::_Setprecision) [with _CharT = char, _Traits = > std::char_traits<char>] > /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/iomanip:261: > note: std::basic_ostream<_CharT, _Traits>& > std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setw) > [with _CharT = char, _Traits = std::char_traits<char>] make: *** > [westerberg.o] Error 1 -- John Pye School of Mechanical and Manufacturing Engineering The University of New South Wales Sydney NSW 2052 Australia t +61 2 9385 5127 f +61 2 9663 1222 mailto:john.pye_AT_student_DOT_unsw.edu.au http://pye.dyndns.org/

1 0

Linking with boost/mingw
by Foster Gareth 03 Oct '05

03 Oct '05

Hello all, I am trying to build an autotooled project that will use boost wave and filesystem. I can see the following files that were built when I compiled boost that I could link to. " libboost_wave-mgw-1_33.lib libboost_wave-mgw-mt-sd-1_33.lib libboost_wave-mgw-d-1_33.lib libboost_wave-mgw-mt-sd.lib libboost_wave-mgw-d.lib libboost_wave-mgw-mt.lib libboost_wave-mgw-mt-1_33.lib libboost_wave-mgw-s-1_33.lib libboost_wave-mgw-mt-d-1_33.lib libboost_wave-mgw-s.lib libboost_wave-mgw-mt-d.lib libboost_wave-mgw-sd-1_33.lib libboost_wave-mgw-mt-s-1_33.lib libboost_wave-mgw-sd.lib libboost_wave-mgw-mt-s.lib libboost_wave-mgw.lib " Which of those should I be linking to? I have added the following to my configure.ac " # Ask user for path to boost stuff:. AC_ARG_WITH(boost, [ --with-boost=<path> prefix of Boost 1.33 installation. e.g. /usr/local or /usr], [BOOST_PREFIX=$with_boost], AC_MSG_ERROR([You must call configure with the --with-boost option. This tells configure where to find the Boost C++ librarys and headers. e.g. --with-boost=/usr/local or --with-boost=/usr]) ) AC_SUBST(BOOST_PREFIX) # Individual boost libs BOOST_WAVE_LIBS="-L${BOOST_PREFIX}/lib/libboost_wave-mgw-1_33.lib" BOOST_FILESYSTEM_LIBS="-L${BOOST_PREFIX}/lib/libboost_filesystem-mgw-1_33.li b" BOOST_CFLAGS="-I${BOOST_PREFIX}/include/boost-1_33" AC_SUBST(BOOST_WAVE_LIBS) AC_SUBST(BOOST_FILESYSTEM_LIBS) AC_SUBST(BOOST_CFLAGS) " I get link errors when I try to make this project however. So the include path is working, I suppose I just need to get the right library. As an aside, it would be _really_ nice if the boost jam build procedure installed package config .pc files, I know Boost doesn't use autotools, but lots of people do, and it would make their lives easier :) <wish> PKG_CHECK_MODULES(DEPS, boost >= 1.33) </wish> Cheers all, Gaz

2 1

Class assignment and referencing
by Wyatt Greenway 02 Oct '05

02 Oct '05

Hello! I want to do the following with Boost::Python: class A { public: std::string Value; }; class B { public: A Str; int Val; }; /* Boost::Code */ class_<A>("A") .def("Value", &A::Value) ; class_<B>("B") .def("Str", &B::Str) .def("Val", &B::Val) ; /*---------*/ I then wish to do this in Python: ############### MyB = B() B.Str = "Some string" print "String: %s"%B.Str # The output should be as follows: > String: Some string How do I acomplish this?

1 0

[iostreams] problem with bzip2_decompressor and incomplete files
by Tiago de Paula Peixoto 02 Oct '05

02 Oct '05

Hello. I've been experiencing a problem with the bzip2_decompressor filter when reading from a stream attached to an incomplete file. Instead of throwing an exception or reaching EOF, the program just hangs. Consider the following example code (hello.cc) taken from the documentation: ----------------------------------------------------------- #include <fstream> #include <iostream> #include <boost/iostreams/filtering_streambuf.hpp> #include <boost/iostreams/copy.hpp> #include <boost/iostreams/filter/bzip2.hpp> int main() { using namespace std; using namespace boost; using namespace boost::iostreams; ifstream file("hello.bz2", ios_base::in | ios_base::binary); filtering_streambuf<input> in; in.push(bzip2_decompressor()); in.push(file); boost::iostreams::copy(in, cout); } ----------------------------------------------------------- Suppose this is compiled as "hello". The following command will generate a simple bzip2-compressed file: $ echo -e "Hello world\n" | bzip2 > hello-complete.bz2 The next line will copy everything but the last byte from "hello-complete.bz2" to "hello.bz2": $ dd if=hello-complete.bz2 of=hello.bz2 bs=1 count=53 So now if the program is run: $ ./hello It just hangs in an infinite loop, instead of throwing an exception or reaching EOF. In the same situation, gzip_decompressor throws an exception... Is there a reason for this not happening in this case, or is this just a bug? I'm using boost 1.33.0 with GCC 4.0.1 on an i686 with GNU/Linux. Thanks for any help. -- Tiago de Paula Peixoto <tiago(a)forked.de>

2 1

Managing builds
by Aaron Griffin 02 Oct '05

02 Oct '05

I have a question, and it's something that has been bothering me for some time when dealing with boost. There are certain boost libs which require link libraries (static/dynamic). That's normal. However, if I wanted to statically link against, say, multithreaded Boost.Filesystem (gcc), I would need to add -Bstatic -lboost_filesystem-gcc-mt (or something to that effect). A majority of projects provide some sort of pkg-config files, or even their own app (gtk-config ?). Is there any functionality like this out there? Is there any way I can make this re-buildable on multiple target machines with multiple install locations in an easy manner? Ideally, something like: boost-config --static-libs filesystem would fit the standard scheme and allow for different machine to have different boost installation roots, and things of that nature. Without something like that, I am forced to either add configure flags, or force a user to modify a "config.mk" style file.

3 4

scoped_ptr help.
by John Sun 01 Oct '05

01 Oct '05

New to this topic,and need some help here. I have a class which use the scoped_ptr as a member variable. Class CTest { public: CTest(); Initialize(); ~CTest(); private: scoped_ptr<CTest2> m_spTest2; } For some reason, that I cannot initialize m_spTest2 in the member initialization list of the constructor, so I have to initialize in some other functions like in Initialize. CTest::Initialize() { int aa, bb; m_spTest2=new CTest2(aa, bb); } The compiler will complain about that, so what's the right way to do it. Thanks, Jianwei

6 8

Dynamic-only installation
by George Sakkis 01 Oct '05

01 Oct '05

Hi all, I'd like to create a single version for each boost library instead of eight, so I run: bjam -sTOOLS=gcc -sBUILD="release <runtime-link>dynamic <threading>multi" install Although it doesn't build the debug single-threaded versions, it still creates both the dynamic and the static ones. Does the static version have to be built always ? TIA, George

1 0