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[program options] & also an apology to the list...
by jono 10 Jun '07

10 Jun '07

...for my earlier grumpy email about program_options. i'm was wanting to pass some sequences to some options using boost::program_options. something like: [me@here ~]$program --opt1 1 2 3 4 --opt2 5 6 7 8 --opt3 xxx yyy zzz if i use desc.add_options("opt1", value< vector<string> >()->multitoken(), "...") i get all the tokens to the end of the line. can i make multitoken() stop eating tokens by recognizing a syntactic element; either an option specifier or a token it can't interpret as a required type? can i inherit from the value_semantic class to read multiple tokens maybe? this whole library is very interesting but subtle. i do better when i can read examples of working code. does anyone know a more extensive discussion of it besides the distibution docs? ...which are great by the way! cheers jono

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Problem with boost::program_options
by Jonas Bösch 10 Jun '07

10 Jun '07

Hi, I'm having a problem with boost::program_options. I attached a stripped-down version of the code that demonstrates the problem. I have a number of positional arguments ( "ops" ), and one normal argument ( "input-file,i" ). Now, if i run the program ./op_test pos0 pos1 pos2 -i non_positional it interpretes the "non_positional" as further positional arg, and not as parameter belonging to -i. Any hints on how to solve this are greatly appreciated. I ran it on: Mac OS X 10.4 on a G5, with the latest XCode ( gcc 4.0.1 ) boost 1.34 Jonas

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BGL: INTERNAL COMPILER ERROR in VC7.1
by Yariv Tal 10 Jun '07

10 Jun '07

This one was already posted by Nicholas Burlett awhile back (see http://lists.boost.org/MailArchives/boost-users/msg06534.php) but I have some new info that may help. The problem: ========= When compiling code that uses the boost.graph library the VC7.1 compiler shouts: c:\boost_1_32_0\boost\mpl\aux_\preprocessed\plain\apply_wrap.hpp(48) : fatal error C1001: INTERNAL COMPILER ERROR As Nicholas already noted, this seems to be due to some compiler problem with the boost.graph out_edge_iterators since it is caused by the following lines in my code: (FilteredGraphGenerator::FilteredGraph is a typedef of a boost::filtered_graph) typedef boost::graph_traits<FilteredGraphGenerator::FilteredGraph> ::out_edge_iterator oedge_iterator; oedge_iterator edgesItr, edgesEnd; boost::tie(edgesItr, edgesEnd) = boost::out_edges(itr->first, m_g.m_filteredGraph); while (edgesItr != edgesEnd) { // do anything! } In fact, it seems to be related to the operator!= between iterators (if the while loop is commented out it compiles). How ever, the error persists even after changing the operator!= to operator== : while (edgesItr == edgesEnd) { // do anything! } ========================================================================== Some findings: =========== * We used to use boost_1_30_0 and the code used to compile PERFECTLY. The problem only appeared after migrating to boost_1_32_0. * Calling directly to the "equal" function in iterator_core_access instead of the operator== works. typedef boost::graph_traits<FilteredGraphGenerator::FilteredGraph> ::out_edge_iterator oedge_iterator; oedge_iterator edgesItr, edgesEnd; boost::tie(edgesItr, edgesEnd) = boost::out_edges(itr->first,m_g.m_filteredGraph); while (boost::iterator_core_access::equal(edgesItr, edgesEnd, boost::mpl::true_())) { // do somthing } * The error message location is at the mpl::apply_wrap2 function. Any relation to the mpl::apply2 function used for declaring the operator== in the BOOST_ITERATOR_FACADE_INTEROP_HEAD macro? Have these functions changed since v1.30.0?

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Problem with ProgramOptions
by Jonas Boesch 10 Jun '07

10 Jun '07

Hi, I'm having a problem with boost::program_options. I attached a stripped-down version of the code that demonstrates the problem. I have a number of positional arguments ( "ops" ), and one normal argument ( "input-file,i" ). Now, if i run the program ./op_test pos0 pos1 pos2 -i non_positional it interpretes the "non_positional" as further positional arg, and not as parameter belonging to -i. Any hints on how to solve this are greatly appreciated. My machine: Mac OS X 10.4 ppc ( G5 ) XCode 2.4.1 ( gcc 4.0.1 ) boost 1.34 Greetings, Jonas The code: // ------------------------ options.h ------------------- #ifndef __VMML__OPTIONS__H__ #define __VMML__OPTIONS__H__ #include <boost/program_options.hpp> #include<map> namespace vmml { namespace boost_po = ::boost::program_options; typedef ::boost::program_options::variables_map var_map; class options { public: options(); void setup( int argc, char* argv[] ); void get_operator_chain( std::vector< std::string >& op_chain ); protected: // generic options boost_po::options_description _generic_options; // op chain boost_po::options_description _all_options; std::map< std::string, boost_po::options_description* > _op_descs; // positional options boost_po::positional_options_description _positional_desc; boost_po::variables_map _options_map; std::vector< std::vector< std::string > > _op_cfgs_from_file; };//class options };//namespace vmml #endif // --------- options.cpp -------------------------------- #include "options.h" #include <iostream> #include <vector> #include <string> namespace vmml { options::options() : _generic_options( "Generic options" ) { _generic_options.add_options() ("input-file,i", "specify input file") ("ops,O", boost_po::value< std::vector< std::string > >()- >composing(), "specify operators " ) ; _positional_desc.add( "ops", -1 ); } void options::setup( int argc, char* argv[] ) { _all_options.add( _generic_options ); boost_po::store( boost_po::command_line_parser( argc, argv ) .options( _all_options ) .positional( _positional_desc ) //.allow_unregistered() .run(), _options_map ); boost_po::notify( _options_map ); } void options::get_operator_chain( std::vector< std::string >& op_chain ) { if ( _options_map.count("ops") ) { const std::vector< std::string >& ops = _options_map["ops"].as< std::vector< std::string > >(); op_chain = ops; } } }//namespace vmml int main( int argc, char** argv ) { vmml::options opt; opt.setup( argc, argv ); std::vector< std::string > ops; opt.get_operator_chain( ops ); std::vector< std::string >::iterator it = ops.begin(); std::vector< std::string >::iterator itend = ops.end(); for( ; it != itend; ++it ) { std::cout << *it << std::endl; } }

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[boost.python] is it possible to make python::dict wrap an existing python dictionary object instead of making a copy?
by Marcin Kalicinski 10 Jun '07

10 Jun '07

python::dict m_mainNamespace = python::dict(m_mainModule.attr("__dict__")); The above code makes a copy of mainModule dictionary. Is it possible to make m_mainNamespace not a copy but a reference to mainModule dictionary? Marcin

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Failing with "Getting Started on Windows" program
by Robert Murphy 10 Jun '07

10 Jun '07

Hello, Following instructions on the "Getting Started on Windows" page, I installed boost using the BoostPro 1.34.0 Installer on XP Pro. I included the Boost.Regex binaries as directed, too. I'm running VS C++ 2005 Express. SDK is not installed. All directories are linked to as instructed to do so in the properties window. I tried building the 2nd program: e-mail checker one. However I get "LINK : fatal error LNK1104: cannot open file 'user32.lib'" as an error. 'user32.lib' is in the SDK My questions are: 1. Must I have the SDK installed to use boost for general unit testing of code I personally generate? 2. Do I have to have the SDK installed for the above program to run? Thank you. _________________________________________________________________ Dont miss your chance to WIN $10,000 and other great prizes from Microsoft Office Live http://clk.atdmt.com/MRT/go/aub0540003042mrt/direct/01/

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posting
by Jan Stetka 10 Jun '07

10 Jun '07

There is a spam issue. Each time I post to the list I get a reply: Delivered-To: jan.stetka(a)gmail.com Received: by 10.143.43.6 with SMTP id v6cs257677wfj; Sat, 9 Jun 2007 12:47:33 -0700 (PDT) Received: by 10.35.8.1 with SMTP id l1mr6177223pyi.1181418453286; Sat, 09 Jun 2007 12:47:33 -0700 (PDT) Received-SPF: fail X-Gmail-Fetch-Info: 485309469254 1 pop.tiscali.co.uk 110 janpstetka(a)tiscali.co.uk Return-Path: <postmaster(a)sina.com> Received: from r3-111.sinamail.sina.com.cn (202.108.3.111) by mail-11.uk.tiscali.com (7.3.110.8) id 4669D52F00718B6F for janpstetka(a)tiscali.co.uk; Sat, 9 Jun 2007 20:52:04 +0200 Received: (qmail 18402 invoked by uid 99); 9 Jun 2007 18:51:56 -0000 Date: 9 Jun 2007 18:51:56 -0000 Message-ID: <20070609185156.18401.qmail(a)mail3-111.sinamail.sina.com.cn> From: <postmaster(a)sina.com> To: <janpstetka(a)tiscali.co.uk> Subject: =?gbk?B?Ym9vc3QtdXNlcnNAc2luYS5jb221xNfUtq+72Li0?= MIME_version: 1.0 Content-type: text/plain; charset=gbk; format=flowed Content-transfer-encoding: 8BIT Your message received. Thank you. -- =================================================================== ע��2G��䣨 http://mail.sina.com.cn/chooseMode.html ��

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interprocess
by Jan Stetka 09 Jun '07

09 Jun '07

Hi, Interprocess still has not been included in the documentation on the main site yet, wouldn't it be good to include it there as soon as possible as it would increase the usage of interprocess. The "quick guide for the impatient" on maps is very good and a welcome addition to the documentation. The documentation at http://ice.prohosting.com/newfunk/ boost/libs/interprocess/doc/html/interprocess/quick_guide.html #interprocess.quick_guide.qg_interprocess_map reads "Boost.Interprocess's map is The construction of map is a bit tricky, because" which could be an editing or typing mistake as it doesn't currently make much sense. Thanks

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Non-trivial examples of Boost::Interprocess library usage
by Evan Torrie 09 Jun '07

09 Jun '07

Hi I'm new to Boost, and also new to Boost::Interprocess. I've been reading through the documentation for Boost::Interprocess, and have successfully written an application which creates a tree like structure in a managed_memory_mapped_file; saves it to disk, and then other processes can reopen that mmap'ed file and traverse the tree. However, I feel like I really am not making the best use of the library, and would like to get more experience by reading other example code from significant applications Does anyone have source code of a non-trivial application that exercises shared memory or memory-mapped files, storing objects with pointers to other objects (and strings) into the shared memory, deleting, updating, retrieving them etc. Specifically, say I'm trying to port an existing heap-based structure into shared memory. struct foo { int x, y; std::vector< std::string > keys; struct foo* left, right; } struct foo* root; What would this translate to in the boost::interprocess world? Is it possible to write templatized versions of these data structures that would work either with the existing std::allocator heap-based memory or with boost::interprocess stateful allocators without needing to create two versions of this data structure? One problem I've encountered is that default constructors for boost::interprocess::vector/string etc are not possible since they need to be constructed with a stateful allocator... so, does this mean that any constructor for object foo requires an allocator to be passed in which is then used in the initializer list to initialize these member containers? Sorry if this doesn't make sense - but any help would be appreciated. Thanks Evan. ----------------------------------------- E> evan.torrie(a)yahoo.com

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Does Boost include SHA-1 implementation?
by Bo Xie 09 Jun '07

09 Jun '07

I know I can call openSSL(or its libcrypto) for SHA-1. But how about Windows? (I can not redistribute openSSL windows version.) My question is: Does Boost include SHA-1 implementation? Thanks! -Bo

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