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IOStream - expose MemoryInputStream buffer and it's size
by Gheorghe Marinca 16 Oct '12

16 Oct '12

Hy, I want to implement a boost iostream MemoryInputStream like this: class MemoryInputDevice : public boost::iostreams::source { public: MemoryInputDevice(char* buffer, size_t size): buffer(buffer), size(size), pos(0) { } std::streamsize read(char* s, std::streamsize n); private: char* buffer; std::streamsize size; std::streamsize pos; }; typedef boost::iostreams::stream<MemoryInputDevice> MemoryInputStream; I want at the same time to expose to clients beside the istream interface a way for the client to get the pointer to the internal buffer and it's length (getting the pointer to the internal buffer could be questionable but in order not to copy buffer around there are cases where a parser of mine needs all the content of the internal buffer and I don't want to copy that around before passing it to the parser) Is therea way for MemoryInputStream user to get that info ? I was thinking at the stream->rdbuffer() method but it seems it does not give me what I want. Thanks in advance for your help -Ghita

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How to do line clipping using boost polygon?
by jian hu 16 Oct '12

16 Oct '12

Hi, I'm trying to clip line segments using boost polygon. Boost polygon does not provide public interface but somehow I find the function validate_scan(), which can do the line clipping. My input are two segments < (10, 10), (10, 2), 0 > < ( 6, 7), (11, 2), 1 > The numbers in the brackets are coordinates of two end points of the segments and the number after it is the segment id. So it looks like this. The result I expect should be four segments, which are the result of intersection <(10,10), (10,3), 0> <(10,3), (10,2), 0> <(6,7 ), (10,3), 1> <(10,3), (11, 2), 1> However, the <(10,3), (11,2), 1> segment is replace by two segments, which are <(10,3), (10,2), 1> and <(10,2), (11,2), 1>. Can someone tell me what happened? Replacing the segment with the other two are not right behavior. Thank you very much. -- Jian Hu

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[boost.numeric] Poor Performance of numeric_cast
by Tang Jiang Jun 16 Oct '12

16 Oct '12

Hi, I have run a performance testing for numeric_cast recently, and found that the result was really unexpected bad, although the document mentioned that it will be no overhead if overflows don't happen. Could somebody please help me to verify this testing? If this is true, I doubt whether I should use numeric_cast in the production code. Here is my testing code and result. *#include <boost/numeric/conversion/cast.hpp> #include <boost/format.hpp> #include <boost/cstdint.hpp> #include <boost/chrono.hpp> #include <iostream> using namespace std; using namespace boost; using namespace boost::numeric; using namespace boost::chrono; int main() { const static int32_t COUNT = 1000000; high_resolution_clock::time_point start; start = high_resolution_clock::now(); for( int32_t n = 0; n < COUNT; ++n ) { int32_t i32 = 123; int16_t i16 = i32; } cout << format("Native Integer Cast: %1%\n") % ( ( high_resolution_clock::now() - start ) / COUNT ); start = high_resolution_clock::now(); for( int32_t n = 0; n < COUNT; ++n ) { try { int32_t i32 = 100; int16_t i16 = numeric_cast< int16_t >( i32 ); } catch( const bad_numeric_cast& e ) { cout << e.what() << endl; } } cout << format("Boost Integer Cast: %1%\n") % ( ( high_resolution_clock::now() - start ) / COUNT ); start = high_resolution_clock::now(); for( int32_t n = 0; n < COUNT; ++n ) { float f = 100.0f; int32_t i = static_cast< int32_t >( f ); } cout << format("Native Floating-Integer Cast: %1%\n") % ( ( high_resolution_clock::now() - start ) / COUNT ); start = high_resolution_clock::now(); for( int32_t n = 0; n < COUNT; ++n ) { try { float f = 123.0f; int32_t i = numeric_cast< int32_t >( f ); } catch( const bad_numeric_cast& e ) { cout << e.what() << endl; } } cout << format("Boost Floating-Integer Cast: %1%\n") % ( ( high_resolution_clock::now() - start ) / COUNT ); start = high_resolution_clock::now(); for( int32_t n = 0; n < COUNT; ++n ) { int32_t i = 132; float f = static_cast< float >( i ); } cout << format("Native Integer-Floating Cast: %1%\n") % ( ( high_resolution_clock::now() - start ) / COUNT ); start = high_resolution_clock::now(); for( int32_t n = 0; n < COUNT; ++n ) { try { int32_t i = 128; float f = numeric_cast< float >( i ); } catch( const bad_numeric_cast& e ) { cout << e.what() << endl; } } cout << format("Boost Integer-Floating Cast: %1%\n") % ( ( high_resolution_clock::now() - start ) / COUNT ); return 0; };* Result: *Native Integer Cast: 3 nanoseconds Boost Integer Cast: 311 nanoseconds Native Floating-Integer Cast: 4 nanoseconds Boost Floating-Integer Cast: 430 nanoseconds Native Integer-Floating Cast: 2 nanoseconds Boost Integer-Floating Cast: 106 nanoseconds*

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[asio] Custom asynchronous service
by Acer Yang 16 Oct '12

16 Oct '12

Hi all, I would like to adapt my class to asio for offering async_do_something(param, callback) interfaces. After reading examples presented in asio/examples/services/ and some asio source code. I found the example does not do invoke callback stuff (e.g. asio/examples/service/logger_service.cpp). In case of asio source code, there are classes such as detail::wait_handler<> that wrap user callbacks for invoked later. Should I use these wrappers in my service implementation if I hope to comfort the strand design of asio? Do I have other choices? All suggestions are welcome. Best wishes, Acer.

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boost test, valgrind errors in release mode
by Avi Bahra 15 Oct '12

15 Oct '12

I have several libs that I am testing with boost unit test Valgrind shows mismatched free/delete Using opensuse113, gcc 4.5, boost 1.47 I am bit perplexed because: a/ The valgrind errors only show up with release mode. b/ The valgrind errors suggest problems with unit test, but I have dozen or so separate unit tests, however, errors only shows up on one of the tests. has anyone come across these errors, and suggestion of how to overcome. + valgrind --leak-check=full --show-reachable=yes ACore/bin/gcc-4.5/release/coretest ==25529== Memcheck, a memory error detector ==25529== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al. ==25529== Using Valgrind-3.5.0 and LibVEX; rerun with -h for copyright info ==25529== Command: ACore/bin/gcc-4.5/release/coretest ==25529== ==25529== Mismatched free() / delete / delete [] ==25529== at 0x4C25F7B: free (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==25529== by 0x4D25CA: _ZNSt6vectorISt4pairIN5boost9unit_test13basic_cstringIKcEES5_ESaIS6_EE13_M_insert_auxEN9__gnu_cxx17__normal_iteratorIPS6_S8_EERKS6_.clone.57 (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x4D3B09: _Z41__static_initialization_and_destruction_0ii.clone.0 (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x50EEF5: ??? (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x4265AA: ??? (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x511D22F: ??? (in /usr/lib64/libstdc++.so.6.0.14) ==25529== by 0x50EE74: __libc_csu_init (elf-init.c:120) ==25529== by 0x55C1B0F: (below main) (in /lib64/libc-2.11.2.so) ==25529== Address 0x5904c60 is 0 bytes inside a block of size 32 alloc'd ==25529== at 0x4C267D0: operator new(unsigned long) (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==25529== by 0x4D2561: _ZNSt6vectorISt4pairIN5boost9unit_test13basic_cstringIKcEES5_ESaIS6_EE13_M_insert_auxEN9__gnu_cxx17__normal_iteratorIPS6_S8_EERKS6_.clone.57 (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x4D2F62: _Z41__static_initialization_and_destruction_0ii.clone.0 (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x50EEF5: ??? (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x4265AA: ??? (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x511D22F: ??? (in /usr/lib64/libstdc++.so.6.0.14) ==25529== by 0x50EE74: __libc_csu_init (elf-init.c:120) ==25529== by 0x55C1B0F: (below main) (in /lib64/libc-2.11.2.so) ==25529== ==25529== Mismatched free() / delete / delete [] ==25529== at 0x4C25F7B: free (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==25529== by 0x4D25CA: _ZNSt6vectorISt4pairIN5boost9unit_test13basic_cstringIKcEES5_ESaIS6_EE13_M_insert_auxEN9__gnu_cxx17__normal_iteratorIPS6_S8_EERKS6_.clone.57 (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x4D3B29: _Z41__static_initialization_and_destruction_0ii.clone.0 (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x50EEF5: ??? (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x4265AA: ??? (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x511D22F: ??? (in /usr/lib64/libstdc++.so.6.0.14) ==25529== by 0x50EE74: __libc_csu_init (elf-init.c:120) ==25529== by 0x55C1B0F: (below main) (in /lib64/libc-2.11.2.so) ==25529== Address 0x5904cc0 is 0 bytes inside a block of size 64 alloc'd ==25529== at 0x4C267D0: operator new(unsigned long) (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==25529== by 0x4D2561: _ZNSt6vectorISt4pairIN5boost9unit_test13basic_cstringIKcEES5_ESaIS6_EE13_M_insert_auxEN9__gnu_cxx17__normal_iteratorIPS6_S8_EERKS6_.clone.57 (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x4D3B09: _Z41__static_initialization_and_destruction_0ii.clone.0 (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x50EEF5: ??? (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x4265AA: ??? (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x511D22F: ??? (in /usr/lib64/libstdc++.so.6.0.14) ==25529== by 0x50EE74: __libc_csu_init (elf-init.c:120) ==25529== by 0x55C1B0F: (below main) (in /lib64/libc-2.11.2.so) ==25529== ==25529== Mismatched free() / delete / delete [] ==25529== at 0x4C25F7B: free (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==25529== by 0x4D25CA: _ZNSt6vectorISt4pairIN5boost9unit_test13basic_cstringIKcEES5_ESaIS6_EE13_M_insert_auxEN9__gnu_cxx17__normal_iteratorIPS6_S8_EERKS6_.clone.57 (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x4D3B69: _Z41__static_initialization_and_destruction_0ii.clone.0 (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x50EEF5: ??? (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x4265AA: ??? (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x511D22F: ??? (in /usr/lib64/libstdc++.so.6.0.14) ==25529== by 0x50EE74: __libc_csu_init (elf-init.c:120) ==25529== by 0x55C1B0F: (below main) (in /lib64/libc-2.11.2.so) ==25529== Address 0x5904d40 is 0 bytes inside a block of size 128 alloc'd ==25529== at 0x4C267D0: operator new(unsigned long) (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==25529== by 0x4D2561: _ZNSt6vectorISt4pairIN5boost9unit_test13basic_cstringIKcEES5_ESaIS6_EE13_M_insert_auxEN9__gnu_cxx17__normal_iteratorIPS6_S8_EERKS6_.clone.57 (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x4D3B29: _Z41__static_initialization_and_destruction_0ii.clone.0 (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x50EEF5: ??? (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x4265AA: ??? (in /var/tmp/ma0/clientRoot/workspace/MyProject/ACore/bin/gcc-4.5/release/coretest) ==25529== by 0x511D22F: ??? (in /usr/lib64/libstdc++.so.6.0.14) ==25529== by 0x50EE74: __libc_csu_init (elf-init.c:120) ==25529== by 0x55C1B0F: (below main) (in /lib64/libc-2.11.2.so) ==25529== Best regards, Ta, Avi

1 0

Error : Unable to load Jamfile
by Baba Prasad 15 Oct '12

15 Oct '12

Dear all, I am able to installed boost_1_49_0 in my linux fedora 16 OS and then I exported the bjam file and also BOOST_ROOT. I copied two files into my code directory and name of these files are user-config.jam and boost-build.jam and content of these files as shown bellow. when I try to compile the my code it is giving the following error. Please any one get me out of this problem. my user-config.jam file contains using boost : 1.49 : /home/odtone/Documents/mihf/boost_1_49_0 ; using gcc : : : <cxxflags>-glib-2.0 -dbus-glib-1 : <libs>-glib-2.0 -dbus-glib-1 ; using gcc : : : <compileflags>-glib-2.0 -dbus-glib-1 : <libs>-glib-2.0 -dbus-glib-1 ; my boost-build.jam file contains boost-build /home/odtone/Documents/mihf/boost_1_49_0/tools/build/v2 ; Even though I feel everything looks ok still I am getting following error. Please could you help me . and also I did export bjam also export PATH=$PATH/home/odtone/Documents/mihf/boost_1_49_0/ export BOOST_ROOT=:/home/odtone/Documents/mihf/boost_1_49_0/ [root@odtone-aam odtone]# bjam /home/odtone/Documents/mihf/boost_1_49_0/tools/build/v2/build/project.jam:267: in find-jamfile from module project error: Unable to load Jamfile. error: Could not find a Jamfile in directory ':/home/odtone/Documents/mihf/boost_1_49_0/:/home/odtone/Documents/mihf/boost_1_49_0'. error: Attempted to find it with pattern '[Bb]uild.jam[Jj]amfile.v2[Jj]amfile[Jj]amfile.jam )'. error: Please consult the documentation at 'http://www.boost.org'. /home/odtone/Documents/mihf/boost_1_49_0/tools/build/v2/build/project.jam:288: in load-jamfile from module project /home/odtone/Documents/mihf/boost_1_49_0/tools/build/v2/build/project.jam:62: in project.load from module project /home/odtone/Documents/mihf/boost_1_49_0/tools/build/v2/build/project.jam:766: in project.use from module project /home/odtone/Documents/mihf/boost_1_49_0/tools/build/v2/build/project.jam:89: in load-used-projects from module project /home/odtone/Documents/mihf/boost_1_49_0/tools/build/v2/build/project.jam:73: in load from module project /home/odtone/Documents/mihf/boost_1_49_0/tools/build/v2/build/project.jam:168: in project.find from module project /home/odtone/Documents/mihf/boost_1_49_0/tools/build/v2/build-system.jam:570: in load from module build-system /home/odtone/Documents/mihf/boost_1_49_0/tools/build/v2/kernel/modules.jam:283: in import from module modules /home/odtone/Documents/mihf/boost_1_49_0/tools/build/v2/kernel/bootstrap.jam:142: in boost-build from module /home/odtone/Documents/mihf/odtone/boost-build.jam:2: in module scope from module Best Regards BaBu -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

3 2

how to use staged 1.51 with installed boost 1.49 with autotools?
by Joost Kraaijeveld 14 Oct '12

14 Oct '12

Hi, I use Debian with Boost 1.49 installed. I want to test my application with 1.51 that is compiled into a stage directory. According to ax_boost_boost.m4: If no path to the installed boost library is given the macro searchs under /usr, /usr/local, /opt and /opt/local and evaluates the $BOOST_ROOT environment variable. How can I use my staged version, as the installed version is found in /usr? TIA -- Groeten, Joost Kraaijeveld Askesis B.V. Molukkenstraat 14 6524NB Nijmegen tel: 024-3888063 / 06-51855277 fax: 024-3608416 web: www.askesis.nl

3 6

Getting undirected graph from directed graph discarding properties
by Philipp Klaus Krause 13 Oct '12

13 Oct '12

I have a directed graph that has some properties, and I want the underlying undirected graph, but don't need the properties there. Assuming G is the directed graph with properties, and G_sym is the undirected without them, up until boost 1.50 I used: boost::copy_graph(G, G_sym); But as of boost 1.51 and 1.52 this gives an error due to the properties. Is there an easy way to do what I want to do in boost, and if yes, how? Philipp g++ -pipe -ggdb -g -O2 -Wall -Wno-parentheses -I /tmp/boost_1_52_0_beta1 -I /tmp/boost_1_52_0_beta1 -I. -I. -I././support/util -I. -I /tmp/boost_1_52_0_beta1 -I. -I.. -I./../support/util -I. -I. -c -o SDCClospre.o SDCClospre.cc In file included from SDCClospre.hpp:26:0, from SDCClospre.cc:24: SDCCtree_dec.hpp: In instantiation of ‘void tree_decomposition_from_elimination_ordering(T_t&, const std::list<unsigned int>&, const G_t&) [with T_t = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, tree_dec_lospre_node>; G_t = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>]’: SDCCtree_dec.hpp:274:3: required from ‘void thorup_tree_decomposition(T_t&, const G_t&) [with T_t = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, tree_dec_lospre_node>; G_t = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>]’ SDCClospre.cc:289:68: required from here SDCCtree_dec.hpp:260:3: error: no match for ‘operator=’ in ‘G_sym = G’ SDCCtree_dec.hpp:260:3: note: candidate is: In file included from /tmp/boost_1_52_0_beta1/boost/graph/graphviz.hpp:24:0, from SDCClospre.hpp:22, from SDCClospre.cc:24: /tmp/boost_1_52_0_beta1/boost/graph/adjacency_list.hpp:313:21: note: boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS>& boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS>::operator=(const boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS>&) [with OutEdgeListS = boost::vecS; VertexListS = boost::vecS; DirectedS = boost::undirectedS; VertexProperty = boost::no_property; EdgeProperty = boost::no_property; GraphProperty = boost::no_property; EdgeListS = boost::listS; boost::adjacency_list<OutEdgeListS, VertexListS, DirectedS, VertexProperty, EdgeProperty, GraphProperty, EdgeListS> = boost::adjacency_list<boost::vecS, boost::vecS, boost::undirectedS>] /tmp/boost_1_52_0_beta1/boost/graph/adjacency_list.hpp:313:21: note: no known conversion for argument 1 from ‘const boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>’ to ‘const boost::adjacency_list<boost::vecS, boost::vecS, boost::undirectedS>&’ In file included from /tmp/boost_1_52_0_beta1/boost/graph/graphviz.hpp:19:0, from SDCClospre.hpp:22, from SDCClospre.cc:24: /tmp/boost_1_52_0_beta1/boost/property_map/property_map.hpp: In instantiation of ‘void boost::put(const boost::put_get_helper<Reference, PropertyMap>&, K, const V&) [with PropertyMap = boost::vec_adj_list_vertex_all_properties_map<boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS>, boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS>*, boost::no_property, boost::no_property&>; Reference = boost::no_property&; K = long unsigned int; V = cfg_lospre_node]’: /tmp/boost_1_52_0_beta1/boost/graph/copy.hpp:129:9: required from ‘void boost::detail::vertex_copier<Graph1, Graph2>::operator()(const Vertex1&, Vertex2&) const [with Vertex1 = long unsigned int; Vertex2 = long unsigned int; Graph1 = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>; Graph2 = boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS>]’ /tmp/boost_1_52_0_beta1/boost/graph/copy.hpp:164:11: required from ‘static void boost::detail::copy_graph_impl<0>::apply(const Graph&, MutableGraph&, CopyVertex, CopyEdge, Orig2CopyVertexIndexMap, IndexMap) [with Graph = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>; MutableGraph = boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS>; CopyVertex = boost::detail::vertex_copier<boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>, boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS> >; CopyEdge = boost::detail::edge_copier<boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>, boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS> >; IndexMap = boost::vec_adj_list_vertex_id_map<cfg_lospre_node, long unsigned int>; Orig2CopyVertexIndexMap = boost::iterator_property_map<__gnu_cxx::__normal_iterator<long unsigned int*, std::vector<long unsigned int, std::allocator<long unsigned int> > >, boost::vec_adj_list_vertex_id_map<cfg_lospre_node, long unsigned int>, long unsigned int, long unsigned int&>]’ /tmp/boost_1_52_0_beta1/boost/graph/copy.hpp:348:5: required from ‘void boost::copy_graph(const VertexListGraph&, MutableGraph&) [with VertexListGraph = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>; MutableGraph = boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS>]’ SDCCtree_dec.hpp:155:3: required from ‘void thorup_elimination_ordering(l_t&, const G_t&) [with l_t = std::list<unsigned int>; G_t = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>]’ SDCCtree_dec.hpp:272:3: required from ‘void thorup_tree_decomposition(T_t&, const G_t&) [with T_t = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, tree_dec_lospre_node>; G_t = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>]’ SDCClospre.cc:289:68: required from here /tmp/boost_1_52_0_beta1/boost/property_map/property_map.hpp:361:5: error: no match for ‘operator=’ in ‘(&((const boost::vec_adj_list_vertex_all_properties_map<boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS>, boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS>*, boost::no_property, boost::no_property&>&)pa))->boost::vec_adj_list_vertex_all_properties_map<Graph, GraphPtr, Property, PropertyRef>::operator[]<boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS>, boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS>*, boost::no_property, boost::no_property&>(k) = v’ /tmp/boost_1_52_0_beta1/boost/property_map/property_map.hpp:361:5: note: candidate is: In file included from /tmp/boost_1_52_0_beta1/boost/graph/graph_traits.hpp:26:0, from /tmp/boost_1_52_0_beta1/boost/graph/graphviz.hpp:21, from SDCClospre.hpp:22, from SDCClospre.cc:24: /tmp/boost_1_52_0_beta1/boost/pending/property.hpp:18:10: note: boost::no_property& boost::no_property::operator=(const boost::no_property&) /tmp/boost_1_52_0_beta1/boost/pending/property.hpp:18:10: note: no known conversion for argument 1 from ‘const cfg_lospre_node’ to ‘const boost::no_property&’ In file included from /tmp/boost_1_52_0_beta1/boost/graph/graphviz.hpp:19:0, from SDCClospre.hpp:22, from SDCClospre.cc:24: /tmp/boost_1_52_0_beta1/boost/property_map/property_map.hpp: In instantiation of ‘void boost::put(const boost::put_get_helper<Reference, PropertyMap>&, K, const V&) [with PropertyMap = boost::adj_list_edge_all_properties_map<boost::directed_tag, boost::no_property, boost::no_property&, boost::no_property*, long unsigned int>; Reference = boost::no_property&; K = boost::detail::edge_desc_impl<boost::directed_tag, long unsigned int>; V = float]’: /tmp/boost_1_52_0_beta1/boost/graph/copy.hpp:109:9: required from ‘void boost::detail::edge_copier<Graph1, Graph2>::operator()(const Edge1&, Edge2&) const [with Edge1 = boost::detail::edge_desc_impl<boost::bidirectional_tag, long unsigned int>; Edge2 = boost::detail::edge_desc_impl<boost::directed_tag, long unsigned int>; Graph1 = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>; Graph2 = boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS>]’ /tmp/boost_1_52_0_beta1/boost/graph/copy.hpp:173:11: required from ‘static void boost::detail::copy_graph_impl<0>::apply(const Graph&, MutableGraph&, CopyVertex, CopyEdge, Orig2CopyVertexIndexMap, IndexMap) [with Graph = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>; MutableGraph = boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS>; CopyVertex = boost::detail::vertex_copier<boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>, boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS> >; CopyEdge = boost::detail::edge_copier<boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>, boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS> >; IndexMap = boost::vec_adj_list_vertex_id_map<cfg_lospre_node, long unsigned int>; Orig2CopyVertexIndexMap = boost::iterator_property_map<__gnu_cxx::__normal_iterator<long unsigned int*, std::vector<long unsigned int, std::allocator<long unsigned int> > >, boost::vec_adj_list_vertex_id_map<cfg_lospre_node, long unsigned int>, long unsigned int, long unsigned int&>]’ /tmp/boost_1_52_0_beta1/boost/graph/copy.hpp:348:5: required from ‘void boost::copy_graph(const VertexListGraph&, MutableGraph&) [with VertexListGraph = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>; MutableGraph = boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS>]’ SDCCtree_dec.hpp:155:3: required from ‘void thorup_elimination_ordering(l_t&, const G_t&) [with l_t = std::list<unsigned int>; G_t = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>]’ SDCCtree_dec.hpp:272:3: required from ‘void thorup_tree_decomposition(T_t&, const G_t&) [with T_t = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, tree_dec_lospre_node>; G_t = boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, cfg_lospre_node, float>]’ SDCClospre.cc:289:68: required from here /tmp/boost_1_52_0_beta1/boost/property_map/property_map.hpp:361:5: error: no match for ‘operator=’ in ‘(&((const boost::adj_list_edge_all_properties_map<boost::directed_tag, boost::no_property, boost::no_property&, boost::no_property*, long unsigned int>&)pa))->boost::adj_list_edge_all_properties_map<Directed, Property, PropRef, PropPtr, Vertex>::operator[]<boost::directed_tag, boost::no_property, boost::no_property&, boost::no_property*, long unsigned int>(k) = v’ /tmp/boost_1_52_0_beta1/boost/property_map/property_map.hpp:361:5: note: candidate is: In file included from /tmp/boost_1_52_0_beta1/boost/graph/graph_traits.hpp:26:0, from /tmp/boost_1_52_0_beta1/boost/graph/graphviz.hpp:21, from SDCClospre.hpp:22, from SDCClospre.cc:24: /tmp/boost_1_52_0_beta1/boost/pending/property.hpp:18:10: note: boost::no_property& boost::no_property::operator=(const boost::no_property&) /tmp/boost_1_52_0_beta1/boost/pending/property.hpp:18:10: note: no known conversion for argument 1 from ‘const float’ to ‘const boost::no_property&’

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[1.52.0] Beta1 release available
by Daniel James 13 Oct '12

13 Oct '12

Boost release 1.52.0 beta 1 is now available from SourceForge See https://sourceforge.net/projects/boost/files/boost/1.52.0.beta.1/ This release contains numerous enhancements and bug fixes for existing libraries. For details of what's in the release, see http://www.boost.org/users/history/version_1_52_0.html. Please download the beta, give it a try, and report any problems you encounter. Thanks, -- The Boost Release Team

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[BGL] How do I iterate over a labeled graph?
by eric 12 Oct '12

12 Oct '12

I am trying to iterate over my labeled_graph like so: struct Vertex { std::string vertType; }; typedef Graph::vertex_iterator VertexIter; VertexIter vertexIter, vertexEnd; for (tie(vertexIter, vertexEnd) = vertices(graph); vertexIter != vertexEnd; vertexIter++) { std::string vertexType = graph[*vertexIter].vertType; } However, I get a compiler error saying that graph has no operator [] that accepts an unsigned int. How should I be doing what I'm trying to do? -- View this message in context: http://boost.2283326.n4.nabble.com/BGL-How-do-I-iterate-over-a-labeled-grap… Sent from the Boost - Users mailing list archive at Nabble.com.

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