March 2012 - Boost-users - lists.preview.boost.org

[Range] and [MemberFunction]
by Robert Jones 16 Mar '12

16 Mar '12

In the documentation of Boost.MemberFunction it suggests that a useful purpose for it would be to implement overloads of std algorithms, and indeed other similar algorithms such that the final callable parameter could be a simple pointer to member. struct X { bool method( ); }; std::vector<X> xs; for_each( xs.begin( ), xs.end( ), & X::method ); or from Boost.Range boost::for_each( xs, &X::method ); Is such a facility implemented anywhere in Boost? Where I'm really going with this, is that I'd like to see versions of Boost.Range adaptors which support the same facility, so I can say, for example for_each( xs | filtered( & X::method ), doSomething ); rather than, as at present, for_each ( xs | filtered( bind( & X::method, _1 ) ), doSomething ); and similarly for transformed. Thanks, - Rob.

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Newbie Question - Errors if i want to compile
by Simone Piacco 15 Mar '12

15 Mar '12

Hi everybody. I'm a new user of boost c++. I tried to install it on my Mac. I followed "Getting Started on Unix variant" guide which I found on boost.org site. The first part is ok, I tried to compile and execute the simple example and i had no problem, it runs. After it I tried to build and install the separately-compiled Boost libraries, I copied the example in my editor and I typed on terminal: c++ -I /Users/Simone/Documents/workspace/boost_1_49_0 main.cpp -o main\ ~/boost/stage/lib/libboost_regex-darwin-mt-d-1_49_0.a but the result was: Undefined symbols: "boost::re_detail::get_mem_block()", referenced from: boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::extend_stack()in ccmv1in1.o "boost::match_results<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >::maybe_assign(boost::match_results<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > > const&)", referenced from: boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::match_match()in ccmv1in1.o "boost::re_detail::get_default_error_string(boost::regex_constants::error_type)", referenced from: boost::re_detail::cpp_regex_traits_implementation<char>::error_string(boost::regex_constants::error_type) constin ccmv1in1.o boost::re_detail::cpp_regex_traits_implementation<char>::error_string(boost::regex_constants::error_type) constin ccmv1in1.o "boost::re_detail::put_mem_block(void*)", referenced from: boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::unwind_extra_block(bool)in ccmv1in1.o "boost::re_detail::raise_runtime_error(std::runtime_error const&)", referenced from: void boost::re_detail::raise_error<boost::regex_traits_wrapper<boost::regex_traits<char, boost::cpp_regex_traits<char> > > >(boost::regex_traits_wrapper<boost::regex_traits<char, boost::cpp_regex_traits<char> > > const&, boost::regex_constants::error_type)in ccmv1in1.o "boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::match()", referenced from: bool boost::regex_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >(__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::match_results<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >&, boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > > const&, boost::regex_constants::_match_flags)in ccmv1in1.o "boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::construct_init(boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > > const&, boost::regex_constants::_match_flags)", referenced from: boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::perl_matcher(__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::match_results<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >&, boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > > const&, boost::regex_constants::_match_flags, __gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >)in ccmv1in1.o "boost::re_detail::cpp_regex_traits_implementation<char>::transform_primary(char const*, char const*) const", referenced from: boost::cpp_regex_traits<char>::transform_primary(char const*, char const*) constin ccmv1in1.o "boost::re_detail::cpp_regex_traits_implementation<char>::transform(char const*, char const*) const", referenced from: boost::cpp_regex_traits<char>::transform(char const*, char const*) constin ccmv1in1.o "boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::do_assign(char const*, char const*, unsigned int)", referenced from: boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::assign(char const*, char const*, unsigned int)in ccmv1in1.o ld: symbol(s) not found collect2: ld returned 1 exit status Even if I used the other way to compile, ("separately specify a directory to search (with -Ldirectory)"), the result is always the same. What can I do?? Thank You Simone

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Re: [Boost-users] Graph: writing graph properties to graphml file
by Juerg Tschirren 15 Mar '12

15 Mar '12

That did the trick! Thank you very much Jeremiah for all your help! Juerg On Thu, 15 Mar 2012, Jeremiah Willcock wrote: > On Thu, 15 Mar 2012, Juerg Tschirren wrote: > > Thanks Jeremiah for the prompt answer. Sorry, I forgot to mention, your > > suggested change to graphml.hpp was the first thing I tried yesterday. > > Everything compiles with your suggested change, but the result is a > > runtime error (boost::any_cast exception). As far as I can tell the > > problem origins in line 292 in graphml.hpp. But so far I wasn't able to > > wrap my mind around that dynamic_property_map and I couldn't quite > > figure out yet what is going on and what is supposed to be going on. > Please try the version of graphml.hpp that is in the trunk now using > Graph* as your key type. > -- Jeremiah Willcock

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[heap] pending/mutable_queue.hpp vs heap/mutable_queue.hpp
by Philipp Moeller 15 Mar '12

15 Mar '12

Currently there are two mutable_queue implementations in Boost. One in pending (not really official) and another one in the newly released Heap library. Currently, some of our code currently using mutable_queue from pending. Has somebody already switched between both and found performance differences or can I expect them to perform nearly the same? Will mutable_queue in pending be removed since there is now an official library? Cheers, Philipp Moeller GeometryFactory

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Re: [Boost-users] filesystem path constructor fails when passing in std::string (Visual studio project)
by Sillence, Martin (GE Oil & Gas) 15 Mar '12

15 Mar '12

> The simple code: > std::string str("d:\\New folder"); > bfs::path base(str); > Is causing an illegal memory access giving the following stack trace: > msvcp90d.dll!std::basic_string<char,std::char_traits<char>,std::_DebugHe apAllocator<char> >::assign(const std::basic_string<char,std::char_traits<char>,std::_DebugHeapAllocator<c har> > & _Right="*") Line 1052 C++ > msvcp90d.dll!std::basic_string<char,std::char_traits<char>,std::_DebugHe apAllocator<char> >::operator=(const std::basic_string<char,std::char_traits<char>,std::_DebugHeapAllocator<c har> > & _Right="*") Line 927 C++ OK I guess a bit too trigger happy with this post. I was retesting and release works but debug doesn't... I'm guessing this is due to the fact we have iterator optimisation for release and not for debug e.g. _HAS_ITERATOR_DEBUGGING=0 For some reason debug is linking or pulling in the release library of boost, now I know that I guess it's as good as solved. Sorry for the post, hope it proves useful to someone in future. Regards, M

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Re: [Boost-users] Newbie Question - Errors if i want to compile
by Simone Piacco 15 Mar '12

15 Mar '12

I think my -I directive is right because I tried to compile the first simple example (which doesn't need the separately-compiled Boost libraries) and it was all ok. I also tried your solution but the result was the same... Undefined symbols: "boost::re_detail::get_mem_block()", referenced from:..... etc etc

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Re: [Boost-users] Graph: writing graph properties to graphml file
by Juerg Tschirren 15 Mar '12

15 Mar '12

Thanks Jeremiah for the prompt answer. Sorry, I forgot to mention, your suggested change to graphml.hpp was the first thing I tried yesterday. Everything compiles with your suggested change, but the result is a runtime error (boost::any_cast exception). As far as I can tell the problem origins in line 292 in graphml.hpp. But so far I wasn't able to wrap my mind around that dynamic_property_map and I couldn't quite figure out yet what is going on and what is supposed to be going on. Juerg On Thu, 15 Mar 2012, Jeremiah Willcock wrote: > On Thu, 15 Mar 2012, Juerg Tschirren wrote: > > > > I still have a problem getting graph properties written to a graphml file (vertex and edge properties get written just fine). Following Jeremiah's advise form two weeks > > ago I implemented the code below. The problem appears to be that the instance of ref_property_map contained in the dynamic_properties uses the key type Graph*, but the > > write_graphml function implemented in boost/graph/graphml.hpp expects it to be of type Graph. This of course results in a different typeid and the write_graphml function > > does not recognize the entry in the dynamic properties as graph properties. I tried to change the key type of ref_property_map to Graph, which resulted in a compilation > > error. Any insight in how to solve that problem would be greatly appreciated! > I think (looking at the reading code in libs/graph/example/graphviz.cpp) > that it should be Graph* in write_graphml; try changing that (on lines > 265, 276, and 290 of boost/graph/graphml.hpp in the trunk) and see if it > works. > -- Jeremiah Willcock

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filesystem path constructor fails when passing in std::string (Visual studio project)
by Sillence, Martin (GE Oil & Gas) 15 Mar '12

15 Mar '12

Hi, The simple code: std::string str("d:\\New folder"); bfs::path base(str); Is causing an illegal memory access giving the following stack trace: msvcp90d.dll!std::basic_string<char,std::char_traits<char>,std::_DebugHe apAllocator<char> >::assign(const std::basic_string<char,std::char_traits<char>,std::_DebugHeapAllocator<c har> > & _Right="*") Line 1052 C++ msvcp90d.dll!std::basic_string<char,std::char_traits<char>,std::_DebugHe apAllocator<char> >::operator=(const std::basic_string<char,std::char_traits<char>,std::_DebugHeapAllocator<c har> > & _Right="*") Line 927 C++ msvcp90d.dll!std::_DebugHeapString::operator=(const std::_DebugHeapString & __that={...}) + 0x15 bytes C++ app.exe!std::locale::locale<windows_file_codecvt>(const std::locale & _Loc={...}, const windows_file_codecvt * _Facptr=0x18972860) Line 316 + 0x27 bytes C++ app.exe!`anonymous namespace'::default_locale() Line 735 C++ app.exe!`anonymous namespace'::path_locale() Line 777 + 0x2a bytes C++ app.exe!boost::filesystem3::path::wchar_t_codecvt_facet() Line 797 + 0x25 bytes C++ app.exe!boost::filesystem3::path::codecvt() Line 389 + 0x5 bytes C++ app.exe!boost::filesystem3::path::path<std::basic_string<char,std::char_ traits<char>,std::allocator<char> > >(const std::basic_string<char,std::char_traits<char>,std::allocator<char> > & source="D:\New folder", void * __formal=0x00000000) Line 135 + 0x5 bytes C++ > app.exe!CDpiExport::configure() Line 188 + 0xe bytes C++ The project is set to use muti byte character support and this hasn't changed in a while I'm sure this was working before and I've reviewed the changes to the project file and I can't see anything that might have broken it. Any suggestions gratefully received. Thanks, M

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Serializing UUIDs into text archives
by Matthias Vallentin 15 Mar '12

15 Mar '12

Serializing a UUID into a boost::archive::binary_[io]archive works fine. However, when changing to a text archive, I get a compiler error with gcc 4.7 in C++11 mode on Darwin. Here is a small example: #include <boost/archive/text_oarchive.hpp> #include <boost/iostreams/device/back_inserter.hpp> #include <boost/iostreams/filtering_stream.hpp> #include <boost/uuid/uuid_generators.hpp> #include <boost/uuid/uuid_serialize.hpp> int main() { std::vector<char> v; boost::iostreams::filtering_ostream stream(boost::iostreams::back_inserter(v)); boost::archive::text_oarchive oa(stream); boost::uuids::uuid id = boost::uuids::random_generator()(); oa << id; return 0; } The error is in basic_text_oprimitive line 92: cannot bind 'std::basic_ostream<char>' lvalue to 'std::basic_ostream<char>&&' Any ideas what's going on? (I attached the full error message below.) Matthias In file included from /opt/local/include/boost/archive/text_oarchive.hpp:30:0, from test.cc:2: /opt/local/include/boost/archive/basic_text_oprimitive.hpp: In instantiation of 'void boost::archive::basic_text_oprimitive<OStream>::save(const T&) [with T = boost::uuids::uuid; OStream = std::basic_ostream<char>]': /opt/local/include/boost/archive/text_oarchive.hpp:61:9: required from 'void boost::archive::text_oarchive_impl<Archive>::save(const T&) [with T = boost::uuids::uuid; Archive = boost::archive::text_oarchive]' /opt/local/include/boost/archive/detail/oserializer.hpp:88:9: required from 'static void boost::archive::save_access::save_primitive(Archive&, const T&) [with Archive = boost::archive::text_oarchive; T = boost::uuids::uuid]' /opt/local/include/boost/archive/detail/oserializer.hpp:232:13: required from 'static void boost::archive::detail::save_non_pointer_type<Archive>::save_primitive::invoke(Archive&, const T&) [with T = boost::uuids::uuid; Archive = boost::archive::text_oarchive]' /opt/local/include/boost/archive/detail/oserializer.hpp:308:9: required from 'static void boost::archive::detail::save_non_pointer_type<Archive>::invoke(Archive&, const T&) [with T = boost::uuids::uuid; Archive = boost::archive::text_oarchive]' /opt/local/include/boost/archive/detail/oserializer.hpp:314:9: required from 'static void boost::archive::detail::save_non_pointer_type<Archive>::invoke(Archive&, T&) [with T = boost::uuids::uuid; Archive = boost::archive::text_oarchive]' /opt/local/include/boost/archive/detail/oserializer.hpp:525:5: required from 'void boost::archive::save(Archive&, T&) [with Archive = boost::archive::text_oarchive; T = boost::uuids::uuid]' /opt/local/include/boost/archive/detail/common_oarchive.hpp:69:9: required from 'void boost::archive::detail::common_oarchive<Archive>::save_override(T&, int) [with T = boost::uuids::uuid; Archive = boost::archive::text_oarchive]' /opt/local/include/boost/archive/basic_text_oarchive.hpp:80:9: required from 'void boost::archive::basic_text_oarchive<Archive>::save_override(T&, int) [with T = boost::uuids::uuid; Archive = boost::archive::text_oarchive]' /opt/local/include/boost/archive/detail/interface_oarchive.hpp:63:9: required from 'Archive& boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) [with T = boost::uuids::uuid; Archive = boost::archive::text_oarchive]' test.cc:15:11: required from here /opt/local/include/boost/archive/basic_text_oprimitive.hpp:92:9: error: cannot bind 'std::basic_ostream<char>' lvalue to 'std::basic_ostream<char>&&' In file included from /opt/local/include/boost/archive/text_oarchive.hpp:19:0, from test.cc:2: /opt/local/include/gcc47/c++/ostream:600:5: error: initializing argument 1 of 'std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&&, const _Tp&) [with _CharT = char; _Traits = std::char_traits<char>; _Tp = boost::uuids::uuid]'

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Recommended mock framework to use with Boost?
by doug livesey 15 Mar '12

15 Mar '12

Hi -- I'm trying to learn to develop properly with C++ and Boost, and to that end am learning along with Boost.Test, as I'm a BDD coder in another language (Ruby) in my day job. I'm at the point, now, where my tests could really benefit from a mocking framework. There doesn't appear to be one in Boost (not documented, at least), so I wondered if anyone on the list could recommend a mocking framework that they use that works well with Boost.Test? Any and all advice gratefully received, Doug.

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