- Boost-users - lists.boost.org

Boost 1.60.0 beta 1 Release Candidate 3 available for testing
by Marshall Clow 14 Nov '15

14 Nov '15

Release candidate files for 1.60.0 beta 3 are available at http://boost.cowic.de/rc/ As always, the release managers would appreciate it if you download the candidate of your choice and give building it a try. Please report both success and failure, and anything else that is noteworthy. This helps ensure the candidates build OK before we push them out to SourceForge. Changes since rc1: * Boost.Sprit has been updated and Boost.Log now builds. * Boost.Math has been updated and now builds. [ Note: The RC2 files that I posted yesterday were incorrectly produced. RC3 is identical to what RC2 should have been -- end note ] Known issues: * Errors when building libraries for visual studio: test and type_erasure. * Boost.Test fails when building on Darwin with gcc 4.9.2 The files (and associated md5s) are: MD5 (boost_1_60_0_b1_rc3.7z) = cfac18348700d0e6c1a0e4418a57e9aa MD5 (boost_1_60_0_b1_rc3.tar.bz2) = d3cb5a59e5b38555096814a6bfbcb441 MD5 (boost_1_60_0_b1_rc3.tar.gz) = db9b011547b8933454d0dfe31f7b8551 MD5 (boost_1_60_0_b1_rc3.zip) = 216c7cd0c15c096ece24d2649a272b51 Thanks! -- The release managers

2 3

linker errors in vs2012 and boost 1.59...
by TUELLER, SHAYNE R CIV USAF AFMC 519 SMXS/MXDEC 12 Nov '15

12 Nov '15

All, I'm trying to compile my application which uses boost 1.59 prebuilt binaries for vs2012. Things compile and link just fine in debug mode but I'm having the following linker errors when I try to build in release mode... GRTXserver.obj : error LNK2001: unresolved external symbol "public: void __cdecl boost::container::container_detail::has_member_function_named_construct<clas s boost::container::new_allocator<char> >::BaseMixin::construct(void)" (?construct@BaseMixin@?$has_member_function_named_construct@V?$new_allocator @D@container@boost@@@container_detail@container@boost@@QEAAXXZ) 1>GRTXserver.obj : error LNK2001: unresolved external symbol "public: void __cdecl boost::container::container_detail::has_member_function_named_construct<clas s boost::container::new_allocator<struct boost::container::container_detail::tree_node<struct std::pair<class boost::container::basic_string<char,struct std::char_traits<char>,class boost::container::new_allocator<char> > const ,struct boost::interprocess::ipcdetail::ref_count_ptr>,void *,0,1> > >::BaseMixin::construct(void)" (?construct@BaseMixin@?$has_member_function_named_construct@V?$new_allocator @U?$tree_node@U?$pair@$$CBV?$basic_string@DU?$char_traits@D@std@@V?$new_allo cator@D@container@boost@@@container@boost@@Uref_count_ptr@ipcdetail@interpro cess@3@@std@@PEAX$0A@$00@container_detail@container@boost@@@container@boost@ @@container_detail@container@boost@@QEAAXXZ) 1>C:\GRTXserver\x64\Release\GRTXserver.exe : fatal error LNK1120: 2 unresolved externals I've tried everything but I just can't get it to work. Any ideas or is anyone else having this problem? Thanks, -Shayne

1 0

Boost 1.60.0 beta 1 Release Candidates available for testing
by Marshall Clow 11 Nov '15

11 Nov '15

Release candidate files for 1.60.0 beta 1 are available at http://boost.cowic.de/rc/ As always, the release managers would appreciate it if you download the candidate of your choice and give building it a try. Please report both success and failure, and anything else that is noteworthy. This helps ensure the candidates build OK before we push them out to SourceForge. IMPORTANT NOTE: The files (and associated md5s) are: MD5 (boost_1_60_0_b1_rc1.7z) = ac6b2128d951ad688421fde2d878c2a7 MD5 (boost_1_60_0_b1_rc1.tar.bz2) = 2fc232f255f1ce8868315da207c05b6b MD5 (boost_1_60_0_b1_rc1.tar.gz) = d594e10f2761abaf957a67c6a223d2a4 MD5 (boost_1_60_0_b1_rc1.zip) = 16a2d512fca7995d5fa421d13f841b0f Thanks! -- The release managers

6 15

[coroutines2] Building coroutines2 examples
by Adi Shavit 10 Nov '15

10 Nov '15

Hi, I'm trying to build the Boost 1.59 coroutine and coroutine2 examples. I built boost with b2 (complete build) and am using CMake to generate a VC2015 project to build the samples. All the coroutine samples build and run just fine, but I get *linking* errors with the coroutine2 samples. My CMakeLists.txt file is straightforward, just find boost, include the headers and link to the boost libs: project (coroutines-samples) cmake_minimum_required(VERSION 2.8) find_package(Boost REQUIRED) include_directories(${Boost_INCLUDE_DIR}) link_directories(${Boost_LIBRARY_DIRS}) add_executable(chaining.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/chaining.cpp) add_executable(echo.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/echo.cpp) add_executable(exception.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/exception.cpp) add_executable(fibonacci.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/fibonacci.cpp) add_executable(layout.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/layout.cpp) add_executable(parallel.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/parallel.cpp) add_executable(power.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/power.cpp) add_executable(same_fringe.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/same_fringe.cpp) add_executable(segmented_stack.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/segmented_stack.cpp) add_executable(simple.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/simple.cpp) add_executable(unwind.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/asymmetric/unwind.cpp) add_executable(dice_game.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/symmetric/dice_game.cpp) add_executable(merge_arrays.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/symmetric/merge_arrays.cpp) add_executable(segmented_stack1.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/symmetric/segmented_stack.cpp) add_executable(simple1.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/symmetric/simple.cpp) add_executable(unwind1.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp03/symmetric/unwind.cpp) add_executable(await_emu.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp11/asymmetric/await_emu.cpp) add_executable(fibonacci11.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp11/asymmetric/fibonacci.cpp) add_executable(iterator_range.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp11/asymmetric/iterator_range.cpp) add_executable(layout11.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp11/asymmetric/layout.cpp) add_executable(same_fringe11.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp11/asymmetric/same_fringe.cpp) add_executable(merge_arrays1.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp11/symmetric/merge_arrays.cpp) add_executable(simple2.cpp /some/path/boost_1_59_0/libs/coroutine/example/cpp11/symmetric/simple.cpp) # coroutines2 add_executable(coro2_fibonacci /some/path/boost_1_59_0/libs/coroutine2/example/fibonacci.cpp) add_executable(coro2_layout /some/path/boost_1_59_0/libs/coroutine2/example/layout.cpp) add_executable(coro2_parser /some/path/boost_1_59_0/libs/coroutine2/example/parser.cpp) add_executable(coro2_same_fringe /some/path/boost_1_59_0/libs/coroutine2/example/same_fringe.cpp) add_executable(coro2_segmented /some/path/boost_1_59_0/libs/coroutine2/example/segmented.cpp) add_executable(coro2_simple /some/path/boost_1_59_0/libs/coroutine2/example/simple.cpp) target_link_libraries(chaining.cpp ${Boost_LIBRARIES}) target_link_libraries(echo.cpp ${Boost_LIBRARIES}) target_link_libraries(exception.cpp ${Boost_LIBRARIES}) target_link_libraries(fibonacci.cpp ${Boost_LIBRARIES}) target_link_libraries(layout.cpp ${Boost_LIBRARIES}) target_link_libraries(parallel.cpp ${Boost_LIBRARIES}) target_link_libraries(power.cpp ${Boost_LIBRARIES}) target_link_libraries(same_fringe.cpp ${Boost_LIBRARIES}) target_link_libraries(segmented_stack.cpp ${Boost_LIBRARIES}) target_link_libraries(simple.cpp ${Boost_LIBRARIES}) target_link_libraries(unwind.cpp ${Boost_LIBRARIES}) target_link_libraries(dice_game.cpp ${Boost_LIBRARIES}) target_link_libraries(merge_arrays.cpp ${Boost_LIBRARIES}) target_link_libraries(segmented_stack1.cpp ${Boost_LIBRARIES}) target_link_libraries(simple1.cpp ${Boost_LIBRARIES}) target_link_libraries(unwind1.cpp ${Boost_LIBRARIES}) target_link_libraries(await_emu.cpp ${Boost_LIBRARIES}) target_link_libraries(fibonacci11.cpp ${Boost_LIBRARIES}) target_link_libraries(iterator_range.cpp ${Boost_LIBRARIES}) target_link_libraries(layout11.cpp ${Boost_LIBRARIES}) target_link_libraries(same_fringe11.cpp ${Boost_LIBRARIES}) target_link_libraries(merge_arrays1.cpp ${Boost_LIBRARIES}) target_link_libraries(simple2.cpp ${Boost_LIBRARIES}) target_link_libraries(coro2_fibonacci ${Boost_LIBRARIES}) target_link_libraries(coro2_layout ${Boost_LIBRARIES}) target_link_libraries(coro2_parser ${Boost_LIBRARIES}) target_link_libraries(coro2_same_fringe ${Boost_LIBRARIES}) target_link_libraries(coro2_segmented ${Boost_LIBRARIES}) target_link_libraries(coro2_simple ${Boost_LIBRARIES}) The linked does not seem to be able to find boost::system::system_category. This is my error log: 11>------ Build started: Project: coro2_fibonacci, Configuration: Debug x64 ------ 2>------ Build started: Project: coro2_layout, Configuration: Debug x64 ------ 3>------ Build started: Project: coro2_parser, Configuration: Debug x64 ------ 4>------ Build started: Project: coro2_same_fringe, Configuration: Debug x64 ------ 5>------ Build started: Project: coro2_segmented, Configuration: Debug x64 ------ 6>------ Build started: Project: coro2_simple, Configuration: Debug x64 ------ 1>libboost_context-vc140-mt-gd-1_59.lib(stack_traits.obj) : error LNK2019: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::system_category(void)" (?system_category@system @boost@@YAAEBVerror_category@12@XZ) referenced in function "public: __cdecl boost::thread_exception::thread_exception(int,char const *)" (??0thread_exception@boost@@QEAA@HPEBD@Z) 1>\some\path\Coroutines\build\vs2015.x64\Debug\coro2_fibonacci.exe : fatal error LNK1120: 1 unresolved externals 4>libboost_context-vc140-mt-gd-1_59.lib(stack_traits.obj) : error LNK2019: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::system_category(void)" (?system_category@system @boost@@YAAEBVerror_category@12@XZ) referenced in function "public: __cdecl boost::thread_exception::thread_exception(int,char const *)" (??0thread_exception@boost@@QEAA@HPEBD@Z) 4>\some\path\Coroutines\build\vs2015.x64\Debug\coro2_same_fringe.exe : fatal error LNK1120: 1 unresolved externals 6>libboost_context-vc140-mt-gd-1_59.lib(stack_traits.obj) : error LNK2019: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::system_category(void)" (?system_category@system @boost@@YAAEBVerror_category@12@XZ) referenced in function "public: __cdecl boost::thread_exception::thread_exception(int,char const *)" (??0thread_exception@boost@@QEAA@HPEBD@Z) 2>libboost_context-vc140-mt-gd-1_59.lib(stack_traits.obj) : error LNK2019: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::system_category(void)" (?system_category@system @boost@@YAAEBVerror_category@12@XZ) referenced in function "public: __cdecl boost::thread_exception::thread_exception(int,char const *)" (??0thread_exception@boost@@QEAA@HPEBD@Z) 3>libboost_context-vc140-mt-gd-1_59.lib(stack_traits.obj) : error LNK2019: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::system_category(void)" (?system_category@system @boost@@YAAEBVerror_category@12@XZ) referenced in function "public: __cdecl boost::thread_exception::thread_exception(int,char const *)" (??0thread_exception@boost@@QEAA@HPEBD@Z) 5>libboost_context-vc140-mt-gd-1_59.lib(stack_traits.obj) : error LNK2019: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::system_category(void)" (?system_category@system @boost@@YAAEBVerror_category@12@XZ) referenced in function "public: __cdecl boost::thread_exception::thread_exception(int,char const *)" (??0thread_exception@boost@@QEAA@HPEBD@Z) 6>\some\path\Coroutines\build\vs2015.x64\Debug\coro2_simple.exe : fatal error LNK1120: 1 unresolved externals 2>\some\path\Coroutines\build\vs2015.x64\Debug\coro2_layout.exe : fatal error LNK1120: 1 unresolved externals 3>\some\path\Coroutines\build\vs2015.x64\Debug\coro2_parser.exe : fatal error LNK1120: 1 unresolved externals 5>\some\path\Coroutines\build\vs2015.x64\Debug\coro2_segmented.exe : fatal error LNK1120: 1 unresolved externals 7>------ Skipped Build: Project: ALL_BUILD, Configuration: Debug x64 ------ 7>Project not selected to build for this solution configuration ========== Build: 0 succeeded, 6 failed, 25 up-to-date, 1 skipped ========== What am I doing wrong? Thanks, Adi

1 0

Using boost on AIX with GCC
by Chris Franz 10 Nov '15

10 Nov '15

I'm trying to get started using boost on AIX with GCC. What I seem to be running into is that GCC has a "feature" on AIX such that system headers are wrappered with an implicit 'extern "C"'. I'm not finding a good way to include the boost headers because of this feature. As an example, using about the simplest boost header I could find: $ echo "#include <boost/function_equal.hpp>" > fe.cpp $ g++ fe.cpp -c -isystem/usr/local/include/boost-1_59 In file included from fe.cpp:1:0: /usr/local/include/boost-1_59/boost/function_equal.hpp:15:1: error: template with C linkage template<typename F, typename G> ^ /usr/local/include/boost-1_59/boost/function_equal.hpp:22:1: error: template with C linkage template<typename F, typename G> ^ $ One obvious possibility is to use -I instead of -isystem, but not treating boost headers as system headers results in a multitude of warnings using the verbosity we like to use (I've even run into some boost headers that emit errors if -pedantic-errors is specified). Do I need a different version of gcc and/or boost? How do other people configure this?

2 1

Newbie not able to compile mini_c example
by Dezai G 09 Nov '15

09 Nov '15

Hi boost usersIm newbye in using boost spirit.I have recenly downloaded boost 1.59 library. Im tryng than to compile the mini_c example both on windows with visual studio 2008 and on linux with gcc 4.4.6Im walking throught plenty of errors and didnt found in the documentation what is going wrong.I ve tryed several things throuh search in google but nothing seems to walk An example of error is for linux/gcc : boost_1_59_0/boost/utility/result_of.hpp:190: error: wrong number of template arguments (1, should be 3) Are my compilers incompatible with boost 1.59. In this case what should i use And what are the correct version of library should i use to be fully compliant with visual studio 2à08 or gcc 4.4.6 Best regardsDZ

1 0

[BGL] Connected components of a distributed graph with few edges
by Quaglino Alessio 06 Nov '15

06 Nov '15

Hello, I am trying to compute the number of connected components of a graph with only few edges (i.e. many vertices do not have edges). This works OK for a non-distributed graph. The simplest example of the issue I could come up with is the following: typedef adjacency_list <vecS, vecS, undirectedS> SerialGraph; typedef adjacency_list<vecS, distributedS<mpi_process_group, vecS>, undirectedS> Graph; typedef iterator_property_map<std::vector<int>::iterator, property_map<Graph, vertex_index_t>::type> LocalMap; #ifdef PARALLEL_GRAPH Graph G(nV+1); synchronize(G); std::vector<int> localComponent(nV+1); LocalMap components(localComponent.begin(),get(vertex_index, G)); num = connected_components_ps(G, components); #else SerialGraph G(nV+1); std::vector<int> globalComponent(nV+1); num = connected_components(G, &globalComponent[0]); #endif The distributed version causes a seg fault when calling connected_components_ps, while the non-distributed works fine and correctly finds nV+1 components. If I populate the graph connecting all vertices with edges, both do work fine. What am I doing wrong? Thank you in advance. Regards, Alessio

2 8

BGL, Johnson all pair shortest path and C
by Paolo Bolzoni 05 Nov '15

05 Nov '15

Dear list, I have to use johnson all pair shortest path[1] to have the all pair distance matrix and pass it to a C function. Here is the problem, the C function expect a row-order array, while the Johnson expect a BasicMatrix[2] that understands the m[row][col] syntax. I solved it as shown in the bottom of the email, but it seems so convoluted, is there a simpler way I missed? Yours faithfully, Paolo [1] http://www.boost.org/doc/libs/release/libs/graph/doc/johnson_all_pairs_shor… [2] http://www.boost.org/doc/libs/release/libs/graph/doc/BasicMatrix.html /* -------------- */ //p is the graph //distance_matrix is a std vector auto size = boost::num_vertices(p); Matrix distance_matrix1(distance_matrix, size, size); MatrixR distance_matrix_wrapper(distance_matrix1); //pass distance_matrix_wrapper to johnson algorithm. /* -------------- */ struct Matrix { Matrix(std::vector<int64_t>& storage, size_t rows, size_t columns) : m_{storage}, columns_{columns} { m_.clear(); m_.resize(rows * columns_, int64_t{0}); } int64_t& get(size_t row, size_t column) { return m_[row * columns_ + column]; } std::vector<int64_t>& m_; size_t columns_; }; struct MatrixR; struct MatrixRR { MatrixRR(MatrixR const& m, size_t column) : m_{m}, column_{column} {} int64_t& operator[] (size_t row) const; MatrixR const& m_; size_t column_; }; struct MatrixR { MatrixR(Matrix& m) : m_{m} {} MatrixRR operator[] (size_t column) const { return MatrixRR(*this, column); } Matrix& m_; }; int64_t & MatrixRR :: operator[] (size_t row) const { return m_.m_.get(row, column_); }

1 0

Cannot get boost::asio::read_until to properly read a line. [new to boost/asio]
by Nick Chambers 04 Nov '15

04 Nov '15

Hello everyone! I'm writing an IRC framework (still in very rough, early stages), and am having trouble reading a single line from the server (in this case irc.freenode.net:6667). Ideally, I would get output that looks like the following: > :wolfe.freenode.net NOTICE * :*** Looking up your hostname... > :wolfe.freenode.net NOTICE * :*** Checking Ident > :wolfe.freenode.net NOTICE * :*** Your forward and reverse DNS do not > match, ignoring hostname > :wolfe.freenode.net NOTICE * :*** No Ident response > :wolfe.freenode.net 001 foobarbazball :Welcome to the freenode Internet > Relay Chat Network foobarbazball > :wolfe.freenode.net 002 foobarbazball :Your host is wolfe.freenode.net[ > 91.217.189.44/6667], running version ircd-seven-1.1.3 > :wolfe.freenode.net 003 foobarbazball :This server was created Sun Aug 2 > 2015 at 18:58:22 UTC > :wolfe.freenode.net 004 foobarbazball wolfe.freenode.net ircd-seven-1.1.3 > DOQRSZaghilopswz CFILMPQSbcefgijklmnopqrstvz bkloveqjfI > :wolfe.freenode.net 005 foobarbazball CHANTYPES=# EXCEPTS INVEX > CHANMODES=eIbq,k,flj,CFLMPQScgimnprstz CHANLIMIT=#:120 PREFIX=(ov)@+ > MAXLIST=bqeI:100 MODES=4 NETWORK=freenode KNOCK STATUSMSG=@+ CALLERID=g > :are supported by this server > :wolfe.freenode.net 005 foobarbazball CASEMAPPING=rfc1459 CHARSET=ascii > NICKLEN=16 CHANNELLEN=50 TOPICLEN=390 ETRACE CPRIVMSG CNOTICE DEAF=D > MONITOR=100 FNC > TARGMAX=NAMES:1,LIST:1,KICK:1,WHOIS:1,PRIVMSG:4,NOTICE:4,ACCEPT:,MONITOR: > :are supported by this server > :wolfe.freenode.net 005 foobarbazball EXTBAN=$,ajrxz WHOX CLIENTVER=3.0 > SAFELIST ELIST=CTU :are supported by this server > :wolfe.freenode.net 251 foobarbazball :There are 153 users and 93407 > invisible on 27 servers > :wolfe.freenode.net 252 foobarbazball 24 :IRC Operators online > :wolfe.freenode.net 253 foobarbazball 8 :unknown connection(s) > :wolfe.freenode.net 254 foobarbazball 54832 :channels formed > :wolfe.freenode.net 255 foobarbazball :I have 6701 clients and 1 servers > :wolfe.freenode.net 265 foobarbazball 6701 7241 :Current local users > 6701, max 7241 > :wolfe.freenode.net 266 foobarbazball 93560 97293 :Current global users > 93560, max 97293 > :wolfe.freenode.net 250 foobarbazball :Highest connection count: 7242 > (7241 clients) (668628 connections received) > :wolfe.freenode.net 375 foobarbazball :- wolfe.freenode.net Message of > the Day - > :wolfe.freenode.net 372 foobarbazball :- Welcome to wolfe.freenode.net in > Stockholm, SE. > :wolfe.freenode.net 372 foobarbazball :- Thanks to > http://www.portlane.com/ for sponsoring > :wolfe.freenode.net 372 foobarbazball :- this server! > :wolfe.freenode.net 372 foobarbazball :- > :wolfe.freenode.net 372 foobarbazball :- WOLFE, GENE [1931-]. Prolific > writer of short stories and > :wolfe.freenode.net 372 foobarbazball :- novels. His best-known work is > the multi-volume novel The > :wolfe.freenode.net 372 foobarbazball :- Book of the New Sun. He has won > multiple awards including > :wolfe.freenode.net 372 foobarbazball :- the Nebula Award, the World > Fantasy Award, The Campell > :wolfe.freenode.net 372 foobarbazball :- Memorial Award and the Locus > Award. He was awarded the World > :wolfe.freenode.net 372 foobarbazball :- Fantasy Award for lifetime > achievement in 1996. > :wolfe.freenode.net 372 foobarbazball :- > :wolfe.freenode.net 372 foobarbazball :- Welcome to freenode - supporting > the free and open source > :wolfe.freenode.net 372 foobarbazball :- software communities since 1998. > :wolfe.freenode.net 372 foobarbazball :- > :wolfe.freenode.net 372 foobarbazball :- By connecting to freenode you > indicate that you have read and > :wolfe.freenode.net 372 foobarbazball :- accept our policies as set out > on http://www.freenode.net > :wolfe.freenode.net 372 foobarbazball :- freenode runs an open proxy > scanner. Please join #freenode for > :wolfe.freenode.net 372 foobarbazball :- any network-related questions or > queries, where a number of > :wolfe.freenode.net 372 foobarbazball :- volunteer staff and helpful > users will be happy to assist you. > :wolfe.freenode.net 372 foobarbazball :- > :wolfe.freenode.net 372 foobarbazball :- You can meet us at FOSSCON ( > http://www.fosscon.org) where we get > :wolfe.freenode.net 372 foobarbazball :- together with like-minded FOSS > enthusiasts for talks and > :wolfe.freenode.net 372 foobarbazball :- real-life collaboration. > :wolfe.freenode.net 372 foobarbazball :- > :wolfe.freenode.net 372 foobarbazball :- We would like to thank Private > Internet Access > :wolfe.freenode.net 372 foobarbazball :- ( > https://www.privateinternetaccess.com/) and the other > :wolfe.freenode.net 372 foobarbazball :- organisations that help keep > freenode and our other projects > :wolfe.freenode.net 372 foobarbazball :- running for their sustained > support. > :wolfe.freenode.net 372 foobarbazball :- > :wolfe.freenode.net 372 foobarbazball :- In particular we would like to > thank the sponsor > :wolfe.freenode.net 372 foobarbazball :- of this server, details of which > can be found above. > :wolfe.freenode.net 372 foobarbazball :- > :wolfe.freenode.net 376 foobarbazball :End of /MOTD command. > :foobarbazball MODE foobarbazball :+i > My output on the other hand looks more like: > :sendak.freenode.net NOTICE * :*** Looking up your hostname... > :sendak.freenode.net NOTICE * :*** Checking Ident > :sendak.freenode.net NOTICE * :*** No Ident response > :sendak.freenode.net 001 squawker :Welcome to the freenode Internet Relay > Chat Network squawker > Ibq,k,flj,CFLMPQScgimnprstz CHANLIMIT=#:120 PREFIX=(ov)@+ MAXLIST=bqeI:100 > MODES=4 NETWORK=freenode KNOCK STATUSMSG=@+ CALLERID=g :are supported by > this server > upported by this server > 93546, max 95827 > freenode.net 372 squawker :- SENDAK, MAURICE [1928-2012]. The author of > Seven Little > 372 squawker :- Welcome to freenode - supporting the free and open source > wker :- any network-related questions or queries, where a number of > sendak.freenode.net 372 squawker :- We would like to thank Private > Internet Access > :- of this server, details of which can be found above. > main.cpp: > #include <IRCClient/client.hpp> > /* > #include <IRCClient/logger.hpp> > #include <IRCClient/plugin.hpp> > */ > > int main(int argc, char *argv[]) { > /* > if(argc > 2) { > logger::log(logger::output_type::STDERR, "usage: {1} > [config_file]", argv[0]); > return 1; > } > */ > client::irc bot( > "irc.freenode.net", // server to connect to > "6667", // port to connect on > "", // password > false, // don't connect with ssl > "squawker", // nick > "squawker", // realname > "A c++11 Utility bot written by nchambers", // ident > "#cplusplus.com", // channels to join > "." // command prefix > ); > > bot.on_connect([&bot]() -> void { > bot.nickserv(client::ns::identify, <REDACTED>); > }); > /* > bot.add_handler(client::input_type::privmsg, [](std::string channel, > std::string user, std::string msg) -> void { > logger::log(logger::output_type::STDOUT, "[{1}/{2}] {3}", user, > channel, msg); > }); > > bot.add_handler(client::input_type::command, "load", > [&bot](std::string channel, std::string user, std::string msg) -> void { > bot.load_plugin(plugin::plugin(msg)); > > if(bot.plugin_operation_successful()) { > logger::log(logger::output_type::STDOUT, "successfully loaded > plugin {1}", msg); > bot.msg(channel, "{1}: successfully loaded plugin {2}", user, > msg); > } > > else { > logger::log(logger::output_type::STDERR, "failure to load > plugin {1}", msg); > bot.msg(channel, "{1}: failure to load plugin {2}", user, msg); > } > }); > > bot.add_handler(client::input_type::command, "unload", > [&bot](std::string channel, std::string user, std::string msg) -> void { > bot.unload_plugin(plugin::plugin(msg)); > > if(bot.plugin_operation_successful()) { > logger::log(logger::output_type::STDOUT, "successfully > unloaded plugin {1}", msg); > bot.msg(channel, "{1}: successfully unloaded plugin {2}", > user, msg); > } > > else { > logger::log(logger::output_type::STDERR, "failure to unload > plugin {1}", msg); > bot.msg(channel, "{1}: failure to unload plugin {2}", user, > msg); > } > }); > > bot.add_handler(client::input_type::command, "reload", > [&bot](std::string channel, std::string user, std::string msg) -> void { > bot.reload_plugin(plugin::plugin(msg)); > > if(bot.plugin_operation_successful()) { > logger::log(logger::output_type::STDOUT, "successfully > reloaded plugin {1}", msg); > bot.msg(channel, "{1}: successfully reloaded plugin {2}", > user, msg); > } > > else { > logger::log(logger::output_type::STDERR, "failure to reload > plugin {1}", msg); > bot.msg(channel, "{1}: failure to reload plugin {2}", user, > msg); > } > });*/ > > bot.run(); > return 0; > } > client.hpp: > #ifndef _ROOT_SQUAWKER_IRCCLIENT_CLIENT_HPP__ > #define _ROOT_SQUAWKER_IRCCLIENT_CLIENT_HPP__ > > #include <string> > #include <functional> > > #include <boost/asio.hpp> > > namespace client { > enum class ns: int { > identify=0, > }; > > enum class input_type: int { > privmsg=0, > }; > > class irc { > public: > irc(std::string, std::string, std::string, bool, std::string, > std::string, std::string, std::string, std::string); > > void on_connect(std::function<void()>); > void nickserv(client::ns, std::string); > void run(); > > void send(std::string); > > private: > void connect(); > std::string readline(); > > std::string server; > std::string port; > std::string pass; > bool use_ssl; > std::string nick; > std::string realname; > std::string ident; > std::string channels; > std::string prefix; > std::function<void()> on_connect_callback; > boost::asio::io_service io_service; > boost::asio::ip::tcp::socket socket; > }; > } > > #endif > client.cpp: > #include <IRCClient/client.hpp> > #include <iostream> > #include <sstream> > #include <array> > > client::irc::irc( > std::string server, std::string port, std::string pass, > bool use_ssl, std::string nick, std::string realname, > std::string ident, std::string channels, std::string prefix > ) : > server(server), port(port), pass(pass), > use_ssl(use_ssl), nick(nick), realname(realname), > ident(ident), channels(channels), prefix(prefix), > on_connect_callback([]()->void{}), socket(this->io_service) { > } > > void client::irc::on_connect(std::function<void()> on_connect_callback) { > this->on_connect_callback = on_connect_callback; > } > > void client::irc::nickserv(client::ns command, std::string arguments) { > switch(command) { > case client::ns::identify: > this->send("nickserv identify " + arguments); > break; > } > } > > void client::irc::run() { > this->connect(); > > while(true) { > std::array<char, 128> buf; > boost::system::error_code error; > size_t len = this->socket.read_some(boost::asio::buffer(buf), > error); > > if(error == boost::asio::error::eof) { > break; > } > > else if (error) { > throw boost::system::system_error(error); > } > > std::cout.write(buf.data(), len); > } > } > > void client::irc::send(std::string msg) { > this->socket.write_some(boost::asio::buffer(msg + > std::string("\r\n"))); > } > > void client::irc::connect() { > boost::asio::ip::tcp::resolver resolver(this->io_service); > boost::asio::ip::tcp::resolver::query query(this->server, this->port); > boost::asio::ip::tcp::resolver::iterator endpoint_iterator = > resolver.resolve(query); > > boost::asio::connect(this->socket, endpoint_iterator); > this->send("NICK " + this->nick); > this->send("USER " + this->realname + " * * :" + this->ident); > > while(true) { > std::string line = this->readline(); > std::cout << line << std::endl; > > if(line == ":squawker MODE squawker :+i") { > break; > } > } > > this->on_connect_callback(); > } > > std::string client::irc::readline() { > boost::asio::streambuf buffer; > size_t received = boost::asio::read_until(this->socket, buffer, > "\r\n"); > std::istream is(&buffer); > std::string line; > std::getline(is, line); > return std::string(std::begin(line), std::end(line)-1); > } > any help would be very much appreciated! thank you in advance!

2 2

[BGL] Correct idiom for working with vertices.
by Matthew Markland 04 Nov '15

04 Nov '15

All: I'm building a graph on which I will be running betweenness centrality. This graph consists of a number of edges represented as pairs. For example 1 20 15 10 would represent an edge from 1<->20 and one from 15<->10. These are bidirectional. My initial code created a property_map for the centrality results and then walked through that map using num_vertices(g) as the limit for the for-loop. What I've realized now, though, is that when BGL generates the values for num_vertices (and the iterators for vertices also), it "fills in" the gaps. So, in the graph above there would be 20 vertices that would be interated through even though most of those have no relation to edges in the graph. So, I'm wondering what the usual idiom is in this situation. Should I instead iterator over edges and pull information from the source and target vertices of the edges? Thanks in advance for the information! Matt ---- Matthew Markland mwmarkland(a)outlook.com

2 1