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dynamic_properties and std::vector attributes
by Dominik Dahlem 13 Jun '10

13 Jun '10

Hi guys, the boost graph library has an example on using bundled properties. I would like to serialise the resulting graph into graphml. Using dynamic_properties for the std::vector attribute fails to compile with boost 1.41. Is there a way to get this example below to work? I would greatly appreciate it. Thanks, Dominik #include <vector> #include <string> #include <boost/graph/adjacency_list.hpp> #include <boost/property_map/dynamic_property_map.hpp> struct City { std::string name; int population; std::vector<int> zipcodes; }; struct Highway { std::string name; double miles; int speed_limit; int lanes; bool divided; }; int main() { typedef boost::adjacency_list< boost::listS, boost::vecS, boost::bidirectionalS, City, Highway> Graph; Graph g; Graph::vertex_descriptor v = *vertices(g).first; g[v].name = "Troy"; g[v].population = 49170; g[v].zipcodes.push_back(12180); Graph::edge_descriptor e = *out_edges(v, g).first; g[e].name = "I-87"; g[e].miles = 10; g[e].speed_limit = 65; g[e].lanes = 4; g[e].divided = true; boost::dynamic_properties dp; // dp.property("zip_codes", boost::get(&City::zipcodes, g)); dp.property("name", boost::get(&City::name, g)); return EXIT_SUCCESS; } -- Dominik Dahlem <Dominik.Dahlem(a)scss.tcd.ie> ------------------------------------------------------- Trinity College Dublin School of Computer Science and Statistics, Dublin 2, Ireland tel: (+353) 1-896 3789 fax: (+353) 1-677 2204 www: http://www.cs.tcd.ie/Dominik.Dahlem/ -------------------------------------------------------

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boost lib error
by Jack Bryan 13 Jun '10

13 Jun '10

Hi, all: I need to install boost library (/home/myname/boost_2010_6_8/boost_1_43_0). http://www.boost.org/doc/libs/1_43_0/more/getting_started/index.html It has MPI library : http://www.boost.org/doc/libs/1_42_0/doc/html/mpi.html After installingit, I compile some c++ program with calling for boost.MPI class, the compiler cannot find the header files in the program even though I have included the boost path in the compile command. example: ------------------------------------------------------------------------ #include </boost/mpi/environment.hpp> #include <boost/mpi/communicator.hpp> #include <iostream> namespace mpi = boost::mpi; int main(int argc, char* argv[]) { mpi::environment env(argc, argv); mpi::communicator world; std::cout << "I am process " << world.rank() << " of " << world.size() << "." << std::endl; return 0; } -------------------------------------------------------------------------- mpic++ -o testp2p test_p2p.cpp I/home/myname/boost_2010_6_8/boost_1_43_0 g++: I/home/myname/boost_2010_6_8/boost_1_43_0: No such file or directory test_p2p.cpp:7:38: error: /boost/mpi/environment.hpp: No such file or directory test_p2p.cpp:11:38: error: boost/mpi/communicator.hpp: No such file or directory Actually, I have installed these header files in the directory. I find a possible reason: When I built the package, it tells me that : ----------------------------------------------------------------- -bash-3.2$ ./bjam Building the Boost C++ Libraries. warning: Building Boost.Regex with the optional Unicode/ICU support disabled. note: Please refer to the Boost.Regex documentation for more information note: this is a strictly optional feature. warning: Graph library does not contain MPI-based parallel components. note: to enable them, add "using mpi ;" to your user-config.jam warning: skipping optional Message Passing Interface (MPI) library. note: to enable MPI support, add "using mpi ;" to user-config.jam. note: to suppress this message, pass "--without-mpi" to bjam. note: otherwise, you can safely ignore this message. Component configuration: - date_time : building - filesystem : building - graph : building - graph_parallel : building - iostreams : building - math : building - mpi : building - program_options : building - python : building - random : building - regex : building - serialization : building - signals : building - system : building - test : building - thread : building - wave : building ...patience... ...patience... ...patience... ...found 6754 targets... The Boost C++ Libraries were successfully built! The following directory should be added to compiler include paths: /lustre/jxding/boost_2010_6_8/boost_1_43_0 The following directory should be added to linker library paths: /lustre/jxding/boost_2010_6_8/boost_1_43_0/stage/lib ------------------------------------------------------------------------------------------ It seems that I need to specify I need to use mpi for the bjam builder. But, I have added "using mpi ;" and "using mpi : /opt/openmpi-gnu/bin/mpic++ ;" in the file /home/myname/boost_2010_6_8/boost_1_43_0/user-config.jam. I have also added it in the file /home/myname/boost_2010_6_8/boost_1_43_0/tools/build/v2/user-config.jam. But, I still got the same error. It seems that there is something wrong with the package ? or the compiler cannot understand the "using mpi ;" in the user-config.jam ? Any help is appreciated. Jack June 11 2010 _________________________________________________________________ The New Busy is not the too busy. Combine all your e-mail accounts with Hotmail. http://www.windowslive.com/campaign/thenewbusy?tile=multiaccount&ocid=PID28…

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Boost.Test XML Output formatter generates Invalid XML file.
by Gaurav N Shah 13 Jun '10

13 Jun '10

Hi, I have written my own struct to customize logging from struct "boost::unit_test::output::xml_log_formatter" However, the XML file generated by log Formatter is Invalid. it adds invalid node end = "</>" , by the end of each test case logging. Please check below XML. <TestLog> <TestSuite name="Master Test Suite"> <TestSuite name="test_suite1"> <TestSuite name="MarketDataMasterTestSuite"> <TestSuite name="PostMarketData"> <TestSuite name="CTA"> <TestCase name="LevelOneData">error #LevelOneData#LevelOneData#STOCK$121@4106!132^SYMBOL&C#CLS_PRC_TD#0#NA</> <TestingTime>16000</TestingTime> </TestCase> <TestCase name="LevelOneData">error #LevelOneData#LevelOneData#STOCK$121@4106!132^SYMBOL&CHL#CLS_PRC_TD#0#NA</><TestingTime>0</TestingTime> </TestCase> </TestSuite> </TestSuite> </TestSuite> </TestSuite> </TestSuite> </TestLog> Has anyone faced scenario like this earlier?? Please let me know how to resolve this. Thank You, Gaurav This communication is for informational purposes only. It is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction. All market prices, data and other information are not warranted as to completeness or accuracy and are subject to change without notice. Any comments or statements made herein do not necessarily reflect those of JPMorgan Chase & Co., its subsidiaries and affiliates. This transmission may contain information that is privileged, confidential, legally privileged, and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. Although this transmission and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by JPMorgan Chase & Co., its subsidiaries and affiliates, as applicable, for any loss or damage arising in any way from its use. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. Please refer to http://www.jpmorgan.com/pages/disclosures for disclosures relating to European legal entities.

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count compressed bytes
by Kraus Philipp 13 Jun '10

13 Jun '10

Hi, I have implemented this litte code to compress a file bio::filtering_streambuf< bio::input > l_deflate; switch (m_compress) { case gzip : l_deflate.push( bio::gzip_compressor() ); break; case bzip2 : l_deflate.push( bio::bzip2_compressor() ); break; } l_deflate.push( bio::file_source(p_str, BOOST_IOS::binary) ); I need only the number of compressed bytes of l_deflate. I try to use l_deflate.size() but it returns only a fixed number. How I can read the number of compressed bytes? Thanks Phil

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How to figure out if a boost class does lazy copy or not?
by Peng Yu 13 Jun '10

13 Jun '10

Hi, I need to construct some container in a function and return it. I think that some container in boost follow lazy copy sematics but some don't. For example, if tr1::unordered_map uses lazy copy, then I can return an object of tr1::unordered_map. Otherwise, I should return boost::shared_ptr<tr1::unordered_map>. Although this information may be documented for any container that I will use, I still think that it is still worthwhile to having my own test case to figure it out, because it may not easy to find such information in the document. I'm wondering if there is a generic way to test if a container use lazy copy or not without reading the actual implementation of the class? -- Regards, Peng

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building 1.43 for iPhone
by Igor R 13 Jun '10

13 Jun '10

Hello, Few months ago I succesfully built 1.41 for iPhone, but it seems that the things changed since then. I'm trying to follow these recommendations (for 1.42): http://iphone.galloway.me.uk/2009/11/compiling-boost-for-the-iphone/ I define "iphone3.1.2" version in my user-config.jam, but bjam says: "feature.jam:485: in feature-validate-value-string from module feature error: 'iphone3.1.2' is not know value of feature <macosx-version>". Does it mean that the building system doesn't find user-config.jam? Thanks.

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[bind] counterintuitive behavior with vector and auto_ptr
by Christian Henning 13 Jun '10

13 Jun '10

Hi there, I'm doing some job interview preparations. Always a good idea to go back to the basics and tinker around a bit. I came across a surprising behavior when using std::vector, std::auto_ptr, and boost::bind. Basically, I have a vector of auto_ptrs which is copied into a second vector, thus the first vector's auto_ptr loss their resource and point to nowhere. Basic stuff, as I said. Now, when I try to use an auto_ptr from the first vector using boost::bind everything still works. Meaning the code doesn't fail, although it should. I find that surprising. Why is boost::bind recreating the resource? Here is a my example code: #include <algorithm> #include <iostream> #include <vector> #include <boost/bind.hpp> using namespace std; struct A { A() { cout << "A::A();"; } ~A() { cout << "A::~A();"; } void foo() { cout << "A::foo();"; } }; auto_ptr< A > allocate_A() { return auto_ptr<A>( new A() ); } void call_foo( auto_ptr< A > p ) { p->foo(); } int main() { std::vector< auto_ptr< A > > v( 100 ); generate_n( v.begin(), 100, allocate_A ); for_each( v.begin(), v.end(), boost::bind( &A::foo, _1 )); std::vector< auto_ptr< A > > v2( 100 ); copy( v.begin(), v.end(), v2.begin() ); // auto_ptr in v should be empty now. // this fails //v[0]->foo(); // this fails //for_each( v.begin(), v.end(), call_foo ); // this doesn't fail for_each( v.begin(), v.end(), boost::bind( &A::foo, _1 )); return 0; } I'm using MSVC10 Express. Regards, Christian

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Re: [Boost-users] downloading boost 1.43 using svn
by Steven Watanabe 13 Jun '10

13 Jun '10

AMDG Sean Farrow wrote: > Could someone give me the http path to download the 1.43 release from svn. > http://svn.boost.org/svn/boost/tags/release/Boost_1_43_0/ In Christ, Steven Watanabe

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downloading boost 1.43 using svn
by Sean Farrow 13 Jun '10

13 Jun '10

Hi: Could someone give me the http path to download the 1.43 release from svn. Regards Sean.

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concat files for compression
by Brian Wood 12 Jun '10

12 Jun '10

Am 12.06.2010 um 23:12 schrieb Brian Wood: Kraus Philipp: > Thanks I will take a look at your classes, biut I think, that you > "seperate" files. > I need this one: > > cat first_file > temp > cat second_file >> temp > gzip temp > > The zip functions is implementated but I don't know how to create the >"cat" into one > stream. You're welcome. With my implementation, it depends on the size of the sending buffer. If data from more than one file fits into the buffer, that data is added to the buffer. -- Brian Wood Ebenezer Enterprises http://webEbenezer.net (651) 251-9384 "The L-RD is my light and my salvation: whom shall I fear? the L-RD is the strength of my life; of whom shall I be afraid?"

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