December 2004 - Boost-users

[MPL] map question
by David Greene 04 Jan '05

04 Jan '05

I'm not understanding something about the interaction of map with the algorithms. I've got a map whose value_type is another map. I'd like to iterate through the map entries and add all the "sub-map" entries to the "primary" map. I wrote a little testcase, attached below. When I compile it with g++ 3.3.3, I get this: boost-1_32/boost/mpl/pair.hpp: In instantiation of `boost::mpl::second<mpl_::_2>': fold2.cc:23: instantiated from `boost::mpl::value_type_impl<boost::mpl::aux::map_tag>::apply<map_types, mpl_::_2>' fold2.cc:23: instantiated from `boost::mpl::value_type<map_types, mpl_::_2>' fold2.cc:23: instantiated from here boost-1_32/boost/mpl/pair.hpp:56: error: no type named `second' in `struct mpl_::_2' fold2.cc:23: error: `types' is not a member of type ` boost::mpl::value_type<map_types, mpl_::_2>' fold2.cc:24: error: template argument 1 is invalid fold2.cc:24: error: ISO C++ forbids declaration of `type name' with no type boost-1_32/boost/mpl/aux_/preprocessed/gcc/fold_impl.hpp: In instantiation of `boost::mpl::apply_wrap2<int, map_types, boost::mpl::pair<key1, entry> >': boost-1_32/boost/mpl/aux_/preprocessed/gcc/fold_impl.hpp:49: instantiated from `boost::mpl::apply2<int, map_types, boost::mpl::pair<key1, entry> >' boost-1_32/boost/mpl/aux_/preprocessed/gcc/fold_impl.hpp:49: instantiated from `boost::mpl::aux::fold_impl<1, boost::mpl::m_iter<map_types, 2, 3>, boost::mpl::m_iter<map_types, 3, 3>, map_types, int>' boost-1_32/boost/mpl/fold.hpp:39: instantiated from `boost::mpl::fold<map_types, map_types, int>' fold2.cc:24: instantiated from here boost-1_32/boost/mpl/aux_/preprocessed/gcc/fold_impl.hpp:49: error: ` int' is not a class, struct, or union type boost-1_32/boost/mpl/aux_/preprocessed/gcc/fold_impl.hpp: In instantiation of `boost::mpl::aux::fold_impl<1, boost::mpl::m_iter<map_types, 2, 3>, boost::mpl::m_iter<map_types, 3, 3>, map_types, int>': boost-1_32/boost/mpl/fold.hpp:39: instantiated from `boost::mpl::fold<map_types, map_types, int>' fold2.cc:24: instantiated from here boost-1_32/boost/mpl/aux_/preprocessed/gcc/fold_impl.hpp:49: error: no type named `type' in `struct boost::mpl::apply2<int, map_types, boost::mpl::pair<key1, entry> >' boost-1_32/boost/mpl/aux_/preprocessed/gcc/fold_impl.hpp: In instantiation of `boost::mpl::aux::fold_impl<1, boost::mpl::m_iter<map_types, 2, 3>, boost::mpl::m_iter<map_types, 3, 3>, map_types, int>': boost-1_32/boost/mpl/fold.hpp:39: instantiated from `boost::mpl::fold<map_types, map_types, int>' fold2.cc:24: instantiated from here boost-1_32/boost/mpl/aux_/preprocessed/gcc/fold_impl.hpp:53: error: no type named `type' in `struct boost::mpl::apply2<int, map_types, boost::mpl::pair<key1, entry> >' boost-1_32/boost/mpl/fold.hpp: In instantiation of `boost::mpl::fold<map_types, map_types, int>': fold2.cc:24: instantiated from here boost-1_32/boost/mpl/fold.hpp:39: error: no type named `state' in `struct boost::mpl::aux::fold_impl<1, boost::mpl::m_iter<map_types, 2, 3>, boost::mpl::m_iter<map_types, 3, 3>, map_types, int>' fold2.cc:24: error: syntax error before `;' token fold2.cc:26: error: syntax error before `::' token An EDG-based compiler gives much the same error. What am I doing wrong? Much thanks for the help! -Dave #include <boost/mpl/fold.hpp> #include <boost/mpl/placeholders.hpp> #include <boost/mpl/copy.hpp> #include <boost/mpl/map.hpp> #include <boost/mpl/value_type.hpp> #include <boost/mpl/inserter.hpp> #include <boost/mpl/insert.hpp> #include <boost/mpl/pair.hpp> using namespace boost; using namespace boost::mpl; struct key1 {}; struct key2 {}; struct entry { typedef map<pair<key2, int> > types; }; typedef map<pair<key1, entry> > map_types; typedef fold<map_types, map_types, copy<value_type<map_types, _2>::types, inserter<_1, insert<_1, _2> > > >::type result; result::blah; // Get a printout

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[Regex] How to match the "End of buffer"/"End of string"?
by jordi 03 Jan '05

03 Jan '05

Hi, I'm new in regex and this is my first post, so maybe the solution is obvious but I couldn't find it in google... I need to parse the multiline output of a command, every line ends with a \n except the last one, which actually it ends with the end of buffe ("\0" character). The output I need to parse is something like: "text1 this is a multiple-word text\n text2 another text" (the second line does not have a newline) As a result I want only two sub-expression in a line using a regex like: (\w+)\s+([^\n]+)\n The first submatch should be the first word ("text1" and "text2"), while the second submatch would be the rest of the line ("this is a multiple-word text" and "another text") In my program I use regex_search with the boost::match_continuous option, all the other regex objects are created with the default options. The first line matchs the regex expression without any problem but as the second line does not end with a "\n" it does not. I'm unable to find a good regex expression which can match the two possible "ends of line" (the \n or \0 character).. I've tried some expressions without success: 1.- First I tried to match \n || \0 using: (\w+)\s+([^\n\x00]+)([\n\x00]) but it seems the \x00 is not part of the buffer, so the second line does not match. 2.- Then I tried to use the "$" string without success (By the way, I assumed "$" would work as "\n" but it does not match the "end of line" character. When should I use??) 3.- In google I found that I should use "\z" or "\Z". I tried both, but they didn't work: The last line of the text never matches! (I suppose I need to add a new option to a regex object in order the "\z" o "\Z" strings to work) Finally I've found a workaround using the regex: (\w+)\s+([^\n]+)\n* and now it works but I would like to find a way to match the end of buffer/end of string. Any idea?? Thanks in advance, Jordi

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thread (1.32.0, vc 7.1) memory & resource leak
by Sergey Skorniakov 02 Jan '05

02 Jan '05

Hello, All! I have found that threadmon_mutex, created at line 29 in tss_hooks.cpp never destroyed. Is this the intention? Why it can not be deleted during DLL_PROCESS_DETACH? With best regards, Sergey.

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iterator to std::list keeping boost::shared_ptr
by Ernst Murnleitner 02 Jan '05

02 Jan '05

Hello, I use boost::shared pointers and store them in a std::list. Now, I have some iterators which are stored in other classes. If items are inserted or deleted, the iterators become invalid. Is there a mechanism in the boost::libraries in order to update these iterators (e.g. iterators, containers)? Greetings Ernst -- ############################################### Against software patents: http://petition.eurolinux.org ###############################################

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Boost build error in Cygwin
by Welson Sun 01 Jan '05

01 Jan '05

I downloaded boost_1_32_0.tar.bz2 and tried to build under Cgywin, here is the procedure: 1. Download latest Cygwin setup.exe (Version: 2.427) 2. Run setup.exe and download latest Cygwin distro from http://cygwin.get-software.com 3. Run setup.exe again to install the Cygwin 4. $ bjam -sTOOLS=gcc -sPYTHON_ROOT=/usr -sPYTHON_VERSION=2.4 --builddir=../boost_build install >& build.log Build result: ------------- ...found 11563 targets... ...updating 4329 targets... .. .. ...failed updating 16 targets... ...skipped 20 targets... ...updated 4293 targets... FAILURES: --------- ...failed gcc-Archive-action ../boost_build/bin/boost/libs/serialization/build/libboost_wserialization.a/ gcc/debug/libboost_wserialization-gcc-d-1_32.a... ...failed gcc-Archive-action ../boost_build/bin/boost/libs/serialization/build/libboost_wserialization.a/ gcc/debug/threading-multi/libboost_wserialization-gcc-mt-d-1_32.a... ...failed gcc-Archive-action ../boost_build/bin/boost/libs/serialization/build/libboost_wserialization.a/ gcc/release/libboost_wserialization-gcc-1_32.a... ...failed gcc-Archive-action ../boost_build/bin/boost/libs/serialization/build/libboost_wserialization.a/ gcc/release/threading-multi/libboost_wserialization-gcc-mt-1_32.a... ...failed Chmod1 ../boost_build/bin/boost/libs/test/build/libboost_prg_exec_monitor.dll/gcc/d ebug/libboost_prg_exec_monitor-gcc-d-1_32.dll... ...failed Chmod1 ../boost_build/bin/boost/libs/test/build/libboost_prg_exec_monitor.dll/gcc/d ebug/threading-multi/libboost_prg_exec_monitor-gcc-mt-d-1_32.dll... ...failed Chmod1 ../boost_build/bin/boost/libs/test/build/libboost_prg_exec_monitor.dll/gcc/r elease/libboost_prg_exec_monitor-gcc-1_32.dll... ...failed Chmod1 ../boost_build/bin/boost/libs/test/build/libboost_prg_exec_monitor.dll/gcc/r elease/threading-multi/libboost_prg_exec_monitor-gcc-mt-1_32.dll... ...failed Chmod1 ../boost_build/bin/boost/libs/test/build/libboost_test_exec_monitor.dll/gcc/ debug/libboost_test_exec_monitor-gcc-d-1_32.dll... ...failed Chmod1 ../boost_build/bin/boost/libs/test/build/libboost_test_exec_monitor.dll/gcc/ debug/threading-multi/libboost_test_exec_monitor-gcc-mt-d-1_32.dll... ...failed Chmod1 ../boost_build/bin/boost/libs/test/build/libboost_test_exec_monitor.dll/gcc/ release/libboost_test_exec_monitor-gcc-1_32.dll... ...failed Chmod1 ../boost_build/bin/boost/libs/test/build/libboost_test_exec_monitor.dll/gcc/ release/threading-multi/libboost_test_exec_monitor-gcc-mt-1_32.dll... ...failed Chmod1 ../boost_build/bin/boost/libs/test/build/libboost_unit_test_framework.dll/gc c/debug/libboost_unit_test_framework-gcc-d-1_32.dll... ...failed Chmod1 ../boost_build/bin/boost/libs/test/build/libboost_unit_test_framework.dll/gc c/debug/threading-multi/libboost_unit_test_framework-gcc-mt-d-1_32.dll... ...failed Chmod1 ../boost_build/bin/boost/libs/test/build/libboost_unit_test_framework.dll/gc c/release/libboost_unit_test_framework-gcc-1_32.dll... ...failed Chmod1 ../boost_build/bin/boost/libs/test/build/libboost_unit_test_framework.dll/gc c/release/threading-multi/libboost_unit_test_framework-gcc-mt-1_32.dll... ...failed updating 16 targets... SKIPPED: -------- ...skipped <@boost!lib>libboost_wserialization-gcc-d-1_32.a for lack of <@boost!libs!serialization!build/libboost_wserialization.a/gcc/debug>libboos t_wserialization-gcc-d-1_32.a... ...skipped <@boost!lib>libboost_wserialization-gcc-mt-d-1_32.a for lack of <@boost!libs!serialization!build/libboost_wserialization.a/gcc/debug/threadi ng-multi>libboost_wserialization-gcc-mt-d-1_32.a... ...skipped <@boost!lib>libboost_wserialization-gcc-1_32.a for lack of <@boost!libs!serialization!build/libboost_wserialization.a/gcc/release>libbo ost_wserialization-gcc-1_32.a... ...skipped <@boost!lib>libboost_wserialization-gcc-mt-1_32.a for lack of <@boost!libs!serialization!build/libboost_wserialization.a/gcc/release/threa ding-multi>libboost_wserialization-gcc-mt-1_32.a... ...skipped <@boost!lib>libboost_prg_exec_monitor-gcc-d-1_32.dll for lack of <@boost!libs!test!build/libboost_prg_exec_monitor.dll/gcc/debug>libboost_prg _exec_monitor-gcc-d-1_32.dll... ...skipped <@boost!lib>libboost_prg_exec_monitor-gcc-mt-d-1_32.dll for lack of <@boost!libs!test!build/libboost_prg_exec_monitor.dll/gcc/debug/threading-mu lti>libboost_prg_exec_monitor-gcc-mt-d-1_32.dll... ...skipped <@boost!lib>libboost_prg_exec_monitor-gcc-1_32.dll for lack of <@boost!libs!test!build/libboost_prg_exec_monitor.dll/gcc/release>libboost_p rg_exec_monitor-gcc-1_32.dll... ...skipped <@boost!lib>libboost_prg_exec_monitor-gcc-mt-1_32.dll for lack of <@boost!libs!test!build/libboost_prg_exec_monitor.dll/gcc/release/threading- multi>libboost_prg_exec_monitor-gcc-mt-1_32.dll... ...skipped <@boost!lib>libboost_test_exec_monitor-gcc-d-1_32.dll for lack of <@boost!libs!test!build/libboost_test_exec_monitor.dll/gcc/debug>libboost_te st_exec_monitor-gcc-d-1_32.dll... ...skipped <@boost!lib>libboost_test_exec_monitor-gcc-mt-d-1_32.dll for lack of <@boost!libs!test!build/libboost_test_exec_monitor.dll/gcc/debug/threading-m ulti>libboost_test_exec_monitor-gcc-mt-d-1_32.dll... ...skipped <@boost!lib>libboost_test_exec_monitor-gcc-1_32.dll for lack of <@boost!libs!test!build/libboost_test_exec_monitor.dll/gcc/release>libboost_ test_exec_monitor-gcc-1_32.dll... ...skipped <@boost!lib>libboost_test_exec_monitor-gcc-mt-1_32.dll for lack of <@boost!libs!test!build/libboost_test_exec_monitor.dll/gcc/release/threading -multi>libboost_test_exec_monitor-gcc-mt-1_32.dll... ...skipped <@boost!lib>libboost_unit_test_framework-gcc-d-1_32.dll for lack of <@boost!libs!test!build/libboost_unit_test_framework.dll/gcc/debug>libboost_ unit_test_framework-gcc-d-1_32.dll... ...skipped <@boost!lib>libboost_unit_test_framework-gcc-mt-d-1_32.dll for lack of <@boost!libs!test!build/libboost_unit_test_framework.dll/gcc/debug/threading -multi>libboost_unit_test_framework-gcc-mt-d-1_32.dll... ...skipped <@boost!lib>libboost_unit_test_framework-gcc-1_32.dll for lack of <@boost!libs!test!build/libboost_unit_test_framework.dll/gcc/release>libboos t_unit_test_framework-gcc-1_32.dll... ...skipped <@boost!lib>libboost_unit_test_framework-gcc-mt-1_32.dll for lack of <@boost!libs!test!build/libboost_unit_test_framework.dll/gcc/release/threadi ng-multi>libboost_unit_test_framework-gcc-mt-1_32.dll... ...skipped <@boost!lib>libboost_wserialization-gcc-d.a for lack of <@boost!lib>libboost_wserialization-gcc-d-1_32.a... ...skipped <@boost!lib>libboost_wserialization-gcc-mt-d.a for lack of <@boost!lib>libboost_wserialization-gcc-mt-d-1_32.a... ...skipped <@boost!lib>libboost_wserialization-gcc.a for lack of <@boost!lib>libboost_wserialization-gcc-1_32.a... ...skipped <@boost!lib>libboost_wserialization-gcc-mt.a for lack of <@boost!lib>libboost_wserialization-gcc-mt-1_32.a... ...skipped 20 targets... Looks like the failures is not important, but I am just wondering what is the cause of these problems. Welson Sun

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Memory leak while compiling boost
by Martin Gebert 31 Dec '04

31 Dec '04

Hi! I tried to compile the boost lib from source with $ bjam "-sTOOLS=gcc" but while compiling the process "cc1plus" tends to consume memory quite fast, finally bringing the machine to a halt. Environment: SuSE 8.2, Kernel 2.4.20, all updates gcc (GCC) 3.3 20030226 (prerelease) (SuSE Linux) boost-jam 3.1.10 (also made from source) boost 1.32.0 My fault or a boost/bjam problem? Thanks in advance! Martin

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boost graph gives compile error on VC++ 7.1
by gast 128 31 Dec '04

31 Dec '04

Dear all It's already posted, but there was not a really good answer. If you take from boost graph 'examples/file_dependencies.cpp' and strip down some code, but change the graph type to: typedef adjacency_list<listS, listS, directedS, property<vertex_color_t, default_color_type>, property<edge_weight_t, int> > Graph; Graph g; default_dfs_visitor vis; depth_first_search(g, visitor(vis)); It gives C2678 on VC++ 7.1. Does anyone know what's wrong/possible work around? Wkr me _________________________________________________________________ MSN Search, for accurate results! http://search.msn.nl

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boost::regex partial matches
by L.P. Mergen 31 Dec '04

31 Dec '04

Hello, I apologise in advance if this question is not direct to the right mailinglist, but this was the best I could find. The IRC channel also seems very quite... :) I am currently experimenting with the boost::regex library, and so far it seems to do just the thing I need. However, when I have a regex "[0-9]+[a-zA-Z]+" And want to match this against the string "42foo 42bar" It returns false. This is (as far as I can see) due to the library not taking partial matches too, even when I set the boost::match_partial and boost::match_any flags (which, according to my interpretation, should be doing the trick). Here is my statement: bool success = boost::regex_match(subject->c_str(), returns, expression, boost::match_partial | boost::match_any); I hope anyone has an idea what might be the problem here. Thanks in advance! :) Grt, Leon Mergen

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[iostreams] flush in sink method (newbie)
by Daniel Schlyder 30 Dec '04

30 Dec '04

Hi, I have a class derived from boost::io::sink that I use as follows: boost::io::stream_facade<printsink> os; os << "foo" << std::flush; os->set_colour(255, 255, 0); os << "bar"; How can I flush the buffer in set_colour() method instead of requiring the user to do it? TIA, -- Daniel Schlyder http://bitblaze.com/

2 1

spirit problem
by Cory Nelson 30 Dec '04

30 Dec '04

Hello again, I am trying to use Spirit to parse lines like: name:value but, name might contain colons also. I've not been able to come up with anything that parses this correctly without swallowing up the rest of the document. Anyone able to help? -- Cory Nelson http://www.int64.org

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