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[BGL] seg fault
by John Robertson 22 Oct '09

22 Oct '09

Could I set the size of a set< String> at instantiation time? -JR

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[BGL] seg fault : more readable
by John Robertson 22 Oct '09

22 Oct '09

The following compiles and runs. typedef string Colour; struct edge_properties { vector < set< Colour > > eColours; } //get a reference to the vector of the sets of colours of some edge. vector < set<Colour> > & v_colour_outset = get(m_eColours_map,*out_iter); // Here *out_iter is some edge. //Add a set<Colour> to v_colour_outset ie. to get(m_eColours_map,*out_iter) . set<Colour> colour_set; v_colour_outset.push_back(colour_set); // get a reference to one of the set<colour> in get(m_eColours_map,*out_iter) . set<Colour> & outcset = v_colour_outset[1]; //or [0], or any elt.. But when I try to add a new colour to this set outcset.insert("Blue"); I get segfault. My guess is that there is a predetermined size for colour_set, and when it is push_backed into v_colour_outset, a new colour cannot be added into it. I tried to create a vector of set<Colour> references as follows. struct edge_properties { vector < set< Colour > & > eColours; } But it did not compile. ( shouldn't it? ) Whats the best solution to this problem. Thanks - JR ReplyReply AllMove...InboxBGLGo to Previous message | Go to Next message | Back to Messages Select Message EncodingASCII (ASCII)Greek (ISO-8859-7)Greek (Windows-1253)Latin-10 (ISO-8859-16)Latin-3 (ISO-8859-3)Latin-6 (ISO-8859-10)Latin-7 (ISO-8859-13)Latin-8 (ISO-8859-14)Latin-9 (ISO-8859-15)W. European (850)W. European (CP858)W. European (HPROMAN8)W. European (MACROMAN8)W. European (Windows-1252)Armenia (ARMSCII-8)Baltic Rim (ISO-8859-4)Baltic Rim (WINDOWS-1257)Cyrillic (866)Cyrillic (ISO-8859-5)Cyrillic (KOI8-R)Cyrillic (KOI8-RU)Cyrillic (KOI8-T)Cyrillic (KOI8-U)Cyrillic (WINDOWS-1251)Latin-2 (852)Latin-2 (ISO-8859-2)Latin-2 (WINDOWS-1250)Turkish (ISO-8859-9)Turkish (WINDOWS-1254)Arabic (ISO-8859-6, ASMO-708)Arabic (WINDOWS-1256)Hebrew (856)Hebrew (862)Hebrew (WINDOWS-1255)Chinese Simplified (GB-2312-80)Chinese Simplified (GB18030)Chinese Simplified (HZ-GB-2312)Chinese Simplified (ISO-2022-CN)Chinese Simplified (WINDOWS-936)Chinese Trad.-Hong Kong (BIG5-HKSCS)Chinese Traditional (BIG5)Chinese Traditional (EUC-TW)Japanese (SHIFT_JIS)Japanese (EUC-JP)Japanese (ISO-2022-JP)Korean (ISO-2022-KR)Korean (EUC-KR)Thai (TIS-620-2533)Thai (WINDOWS-874)Vietnamese (TCVN-5712)Vietnamese (VISCII)Vietnamese (WINDOWS-1258)Unicode (UTF-7)Unicode (UTF-8)Unicode (UTF-16)Unicode (UTF-32)| Full Headers Mail Search #yui-main { background-color:#D6DEEC }gLaunchProfile.stop('RT_RP', false);gLaunchProfile.start('RT_BP');gLaunchProfile.start('LD_JS_BP');YAHOO.mc.intl = "us";YAHOO.mc.IM_TOGGLE_STRINGS = {"im_settings_helpurl" : "http://help.yahoo.com/l/us/yahoo/mail/classic/chat/","im_settings_help_toggle" : "1","im_enable_mobile_l10n": "1","im_sign_in": "true","im_time_format_am" : "AM","im_time_format_pm" : "PM","im_date_time_format" : "{M}/{d}/{yy} {h}:{mm} {A}"};if (YAHOO.mc.page..generic) {YAHOO.mc.page.generic.initComposeMenu();}YAHOO.mc.page.BasieSpaceId= "398300973";YAHOO.mc.page.TriggerULT=true;YAHOO.util.Event.onDOMReady(function () {sessionMgr.initSession();sessionMgr.loadFromBookmarks();});var adPrefetch = true;var isAdPrefetched = false;if (document.getElementById("JSMailOptionsLink")) {document.getElementById("JSMailOptionsLink").href = optionObj["JSMailOptionsLink"];}if (document.getElementById("chk_pop_options") || document.getElementById("chk_pop_error") || document.getElementById("option_bad_folder") || document.getElementById("folders_options_spam") || document.getElementById("folders_options_sent") || document.getElementById("spam_edit_options")) {YAHOO.util.Event.addListener(YAHOO.mc.optionsID, "click", displayOptions, optionObj);}YAHOO.namespace("fcue"); YAHOO.mc.FCUE_METADATA = {imInit:"",imSent:"",fcElap:"1254813133500",fcEcap:"2",fcNag:"",inEcap:"",inElap:""};YAHOO.mc.noCues = false;YAHOO.mc.msgrLoaded = false;YAHOO.mc.loadMsgr = function () {clearTimeout(YAHOO.mc.msgrLoadID);if (hasIM && !YAHOO.mc.msgrLoaded) {YAHOO.mc.msgrLoaded = true;YAHOO.util.Get.script("http://mail.yimg.com/d/combo?/mg/8_0_4/js/im_blue_all.js&/mg/8_0_4/js/us_st…");}};YAHOO.util.Event.on(window, "load", YAHOO.mc.loadMsgr);YAHOO.mc.msgrLoadID = setTimeout(YAHOO.mc.loadMsgr, 5000); if (YAHOO.mc.page.galaxy) { YAHOO.mc.page.galaxy.cleanup(); } YAHOO.mc.page.galaxy = new GalaxyHandler(); function myMsgHandler(fid, mid) { YAHOO.mc.page.galaxy.evtCallBack("showMessage?fid=" + fid + "&mid=" + mid + "&.rand=635860173"); } YAHOO.galaxy.setMsgListener(myMsgHandler); function myFolderHandler(fid, filterBy) { var filterUrl = ""; if (filterBy) { filterUrl += "&filterBy=" + filterBy; } YAHOO.mc.page.galaxy.evtCallBack("showFolder?fid=" + fid + filterUrl + "&.rand=635860173"); } YAHOO.galaxy.setFolderListener(myFolderHandler); gLaunchProfile.stop('LD_JS_BP', false);resizeLeftPane();gLaunchProfile.start('RT_AD_FOOT');

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seg fault
by John Robertson 22 Oct '09

22 Oct '09

The following compiles and runs. typedef string Colour; struct edge_properties { vector < set< Colour > > eColours; } //get a reference to the vector of the sets of colours of some edge. vector < set<Colour> > & v_colour_outset = get(m_eColours_map,*out_iter); // Here *out_iter is some edge. //Add a set<Colour> to v_colour_outset ie. to get(m_eColours_map,*out_iter) . set<Colour> colour_set; v_colour_outset.push_back(colour_set); // get a reference to one of the set<colour> in get(m_eColours_map,*out_iter) . set<Colour> & outcset = v_colour_outset[1]; //or [0], or any elt. But when I try to add a new colour to this set outcset.insert("Blue"); I get segfault. My guess is that there is a predetermined size for colour_set, and when it is push_backed into v_colour_outset, a new colour cannot be added into it. I tried to create a vector of set<Colour> references as follows. struct edge_properties { vector < set< Colour > & > eColours; } But it did not compile. ( shouldn't it? ) Whats the best solution to this problem. Thanks - JR

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[fusion] is there anything resembling a joint_view of 2 maps?
by er 22 Oct '09

22 Oct '09

Hi All, I am wondering if anyone knows of anything that resembles a joint_view of a pair of maps. typedef mpl::int_<1> key1_; typedef mpl::int_<2> key2_; typedef pair<key1_,int> pair1_; typedef pair<key2_,int> pair2_; typedef map<pair1_> map1_; typedef map<pair2_> map2_; map1_ m1( make_pair<key1_>(1) ); map2_ m2( make_pair<key2_>(2) ); typedef joint_view< map1_, map2_ > jv_; // not supposed to compile (?), yet it does: jv_ view(m1,m2); // but not this: // at_key<key1_>(view) // I have no choice (?) but create a new map, // although view helps a bit for initializing it: typedef map< pair1_, pair2_ > map3_; map3_ m3 = fusion::as_map(view); int n1 = fusion::at_key<key1_>(m3); BOOST_ASSERT(n1 == 1); int n2 = fusion::at_key<key2_>(m3); BOOST_ASSERT(n2 == 2);

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[conversion] Release v0.3 : Changing the order of assign_to parameters + `tie' function
by vicente.botet 22 Oct '09

22 Oct '09

Hi, I have just released the version 0.3 of Boost.Conversion , which includes since my last publicly announced version 0.1: Version 0.3.0, Oct 22, 2009 Changing the order of to and from parameters on assign_to + Added `tie' function Incopatibility: * Changing the order of to and from parameters on assign_to. * Now boost/conversion/convert_to.hpp and boost/conversion/assign_to.hpp files are separated. New Features: * Added <boost/conversion.hpp> global file. * Added mca() function. * Added convert_to_via function. Test: * Added test for the new features Version 0.2.0, Mai 16, 2009 Adding array + fusion::tuples + Adaptation to Boost 1.39 New Features: * conversion between boost::array of explicitly convertible types. * conversion between Boost.Fusion sequences of explicitly convertible types. You can found all the detail for dowloading, documentation, ... in http://svn.boost.org/trac/boost/wiki/LibrariesUnderConstruction#Boost.Conve… I'd appreciate it if people could take a look, test it on their compiler and give me some feedback. Best regards, _____________________ Vicente Juan Botet Escribá

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[Asio] Any port with an endpoint
by Ryan McConnehey 22 Oct '09

22 Oct '09

In windows there is the capability to create a socket with an address but leave the port number up to windows to select. Is this possible with the asio endpoint or will I always need to define "some" port number? Ryan

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Re: [Boost-users] [signals2][review] The review of the signals2 library (formerly thread_safe_signals) begins today, Nov 1st
by Nat Goodspeed 22 Oct '09

22 Oct '09

[Sorry, I know I'm replying to a very old post, but this IS continuing the same exchange.] Frank Mori Hess wrote: > > On Wednesday 18 February 2009, Nat Goodspeed wrote: >> [snip - talking about boost::signals2::signal::connect() accepting a boost::bind expression containing a boost::shared_ptr] >> the >> shared_ptr copy stored in the boost::bind() result makes the referenced >> object effectively immortal. >> >> To my surprise, I find that it's not destroyed even when I explicitly >> disconnect the resulting connection. > It will get destroyed eventually. The signal cleans up its slot list little > by little during connect/invoke. It doesn't immediately remove disconnected > slots from the slot list since other threads might be using the same slot > list concurrently. It might be possible to make it immediately reset the > shared_ptr owning the slot though, leaving an empty shared_ptr in the slot > list, since that wouldn't invalidate any iterators. Frank, has this logic changed at all since Boost 1.39? I've bumped into a situation where the lazy cleanup is causing a crash. We've got a DLL containing a slot stored in a signal used by the main program. Before attempting to unload the DLL, we disconnect the slot -- but the signal retains a reference to memory invalidated by the departure of the DLL, resulting in badness. Would updating to Boost 1.40 solve this problem? Or is there some explicit cleanup call we could/should make with a 1.39 boost::signals2::signal? Or could you suggest how to patch the logic as you describe above? Many thanks.

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shared_ptr and inheritance
by Daniele Barzotti 22 Oct '09

22 Oct '09

Maybe this is a simple question but... Suppose to have: template<typename T> class Base {...}; template<typename T> class Derived : public Base<T> {...}; and shared_ptr< Base<T> > BasePtr; shared_ptr< Derived<T> > DerivedPtr; How can assign BasePtr to DerivedPtr? Thanks Daniele.

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using pairs with boost.foreach
by Sean Farrow 22 Oct '09

22 Oct '09

Hi: Is it possible to use an std::pair with boost.foreach? I'm getting all sorts of errors when trying to do this. Any help appreciated.

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need help using boost bzip2 filter on Windows (or zlib filter)
by ChristinaDRS 22 Oct '09

22 Oct '09

Hello all, I have the following code simple code to compress/uncompress a string: #include <iostream> #include <boost/iostreams/copy.hpp> #include <boost/iostreams/device/back_inserter.hpp> #include <boost/iostreams/filter/bzip2.hpp> #include <boost/iostreams/filtering_stream.hpp> using namespace std; int main() { string message = "this is a test message!"; cout << "message: " << message << endl; string compressed; boost::iostreams::filtering_streambuf<boost::iostreams::output> out; out.push(boost::iostreams::zlib_compressor()); out.push(boost::iostreams::back_inserter(compressed)); boost::iostreams::copy(boost::make_iterator_range(message), out); cout << "compressed message: " << compressed << endl; boost::iostreams::filtering_streambuf<boost::iostreams::input> in; in.push(boost::iostreams::zlib_decompressor()); in.push(boost::make_iterator_range(compressed)); string decompressed; boost::iostreams::copy(in, boost::iostreams::back_inserter(decompressed)); cout << "decompressed message: " << decompressed << endl; } but I get the following linking error: 1>------ Build started: Project: bzip2_compression_test, Configuration: Debug Win32 ------ 1>Compiling... 1>bzip2_test.cpp 1>Linking... 1>LINK : fatal error LNK1104: cannot open file 'libboost_bzip2-vc90-mt-gd-1_39.lib' 1>Build log was saved at "file://d:\compression\BoostCompression2\Debug\BuildLog.htm" 1>bzip2_compression_test - 1 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== I tried following the instructions on this page: http://www.boost.org/doc/libs/1_40_0/libs/iostreams/doc/installation.html so I defined these environment variables: BZIP2_BINARY = libbz2.lib BZIP2_INCLUDE = D:\bzip2-1.0.5 BZIP2_LIBPATH = D:\bzip2-1.0.5\Debug BZIP2_SOURCE = D:\bzip2-1.0.5 I also tried a similair example with zlib and I get the same error: 1>------ Build started: Project: libz_compression_test, Configuration: Debug Win32 ------ 1>Compiling... 1>zlib_test.cpp 1>Linking... 1>LINK : D:\Debug\libz_compression_test.exe not found or not built by the last incremental link; performing full link 1>LINK : fatal error LNK1104: cannot open file 'libboost_zlib-vc90-mt-gd-1_39.lib' 1>Build log was saved at "file://d:\\compression\libz_compression_test\Debug\BuildLog.htm" 1>libz_compression_test - 1 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== Any ideas how I can fix this? Thanks! Christina -- View this message in context: http://www.nabble.com/need-help-using-boost-bzip2-filter-on-Windows-%28or-z… Sent from the Boost - Users mailing list archive at Nabble.com.

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