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Serialization / No Default Constructor / Messy
by Dan Eaton 13 May '09

13 May '09

Hi, My question is similar to past questions asked regarding what to do when a class to be deserialized does not have a default constructor. I'm wondering, though, if there is any better way to support both the BINARY and TEXT archive types, than doing this: class MyClass { public: MyClass(int myVar); MyClass( boost::archive::text_iarchive & ar ) { ar >> *this; } MyClass( boost::archive::binary_iarchive & ar ) { ar >> *this; } friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int /* fileVersion */ ) { ar & myVar; } private: int myVar; } Specifically, I'd rather not have to have a constructor for each type of archive! Thanks :) Danny

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BOOST_AUTO_UNIT_TEST
by Ross Boylan 13 May '09

13 May '09

In Boost 1.34, the version just released with Debian Lenny, the release notes for Boost.Test say BOOST_AUTO_UNIT_TEST renamed to BOOST_AUTO_TEST_CASE. Old name still provided but deprecated As far as I can tell, the old name is not provided. Presumably I can provide my own definition to work around this. I am trying to make my code compatible with various releases of Boost (including older ones that use the old name), so I can't just replace all old names with the new one. Ross

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boost unit tests and command line args
by Zachary Turner 13 May '09

13 May '09

I have some unit tests that all use BOOST_AUTO_TEST_CASE. Is there a way for me to hook into the main function before any of my test cases are run to perform initialization, involving the command line arguments that were passed to the executable? Currently there is no main function, it's defined inside the boost headers, and I don't see an obvious way of hooking into it.

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CMake Problems with boost 1.39
by Tan, Tom (Shanghai) 13 May '09

13 May '09

I used CMake to build boost 1.39 and found at least two problems: - In the cmakelist.txt file the BOOST_VERSION_MINOR is 38, instead of 39 - The generated boost.test libs have an additional "-s" to the file names, ex. libboost_unit_test_framework-vc90-mt-1_39-s.lib, instead of libboost_unit_test_framework-vc90-mt-1_39.lib. This will cause a linking error while using boost.test. this does noto happen to the bjamed results. Another thing I noticed but am not sure is that signal2 is not included in the CMake support(no cmakelists.txt under signals). It seems the cmakelist.txt file is still that of 1.38.

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[Serialization] BOOST_CLASS_EXPORT_GUID macro failed to compile with C2888 error.
by Vitaly Dolya 13 May '09

13 May '09

Hi, All! BOOST_CLASS_EXPORT_GUID macro failed to compile with error: error C2888: 'boost::archive::detail::`anonymous-namespace'::init_guid<CSomeClass>' : symbol cannot be defined within namespace 'anonymous-namespace'. Same code compiles properly using boost 1.37. Looks like a bug to me. Using: - boost 1.39 - Microsoft Visual Studio 2008 SP1

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Tips on implementing a function queue with unique queue items (compare function problem)
by Peter Åberg 12 May '09

12 May '09

Hi, Anyone have a tip or pointer regarding how to implement a function queue with unique items? Comparing C++ delegates seems to be hard in general (http://www.boost.org/doc/libs/1_39_0/doc/html/function/faq.html#id1877737) but there are probably workarounds that are alright. It would be nice of course if the queue user stays unaffected by the workaround but that is probably not possible. Another layer perhaps. Any suggestion for the code below? class UniqueFunctionQueue { public: typedef boost::function<void()> QueueItem; public: void push(QueueItem item) { /* ToDo, would be nice to do: if (item is already in the queue) return; */ queue.push_back(item); } void execute() { for(std::deque<QueueItem>::iterator i = queue.begin(); i != queue.end(); i++) (*i)(); queue.clear(); } private: std::deque<QueueItem> queue; }; .... UniqueFunctionQueue queue; queue.push(boost::bind(&Synchronizer::sync, &synchronizer, LeftToRight)); queue.push(boost::bind(&Synchronizer::sync, &synchronizer, RightToLeft)); queue.push(boost::bind(&Initializer::init, &initializer)); queue.push(boost::bind(&Synchronizer::sync, &synchronizer, LeftToRight)); // Should not be added since there is one in the queue already. queue.execute(); Thanks, Peter Åberg

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Incomplete types and intrusive_ptr
by Dominique Devienne 12 May '09

12 May '09

Is it possible to achieve the ability of shared_ptr<T> to be used as a class member in a class declaration with an incomplete type T, with intrusive_ptr? For new code, I'm wrapping classes in shared_ptr, instead of deriving from our refcounted base class. I've also started to use intrusive_ptr for all the legacy code that already derives from RefCountedBase, but unlike shared_ptr I'm forced to #include the header for the type wrapped in the intrusive_ptr, something I'd like to avoid, to reduce build times. Isn't it possible to have a mix of shared_ptr and intrusive_ptr which also captures a Destructor instance when the intrusive_ptr is assigned, similarly to what shared_ptr does? Has this been considered before? Thanks, --DD PS: We have full control of RefCountedBase, so would refactoring it to use boost::detail::shared_count internally allow the change I discuss above? If so, how would one go about it?

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[boost.stringalgo] issue
by Sean Farrow 12 May '09

12 May '09

Hi list: I am in the process of using boost::algorithm::replace_all with the following tuple: Boost::tuple<DWORD, boost::filesystem::wpath> If I use the code below: std::wstring temp1, temp2, temp3; temp1 =ProcInfo.get<1>().string(); temp2 =ProcInfo.get<1>().filename(); temp3 =L"dolapi.dll"; boost::algorithm::replace_all(temp1, temp2, temp3); The code compiles fine, How ever if I use: boost::algorithm::replace_all(ProcInfo.get<1>().string(), ProcInfo.get<1>().filename(), L"dolapi.dll"); Compiling... TPProductsSR.cpp c:\program files\boost\boost\algorithm\string\detail\find_format_all.hpp(250) : error C2664: 'boost::algorithm::detail::erase' : cannot convert parameter 2 from 'input_iterator_type' to 'std::_String_iterator<_Elem,_Traits,_Alloc>' with [ _Elem=wchar_t, _Traits=std::char_traits, _Alloc=std::allocator ] No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called c:\program files\boost\boost\algorithm\string\detail\find_format_all.hpp(185) : see reference to function template instantiation 'void boost::algorithm::detail::find_format_all_impl2<INPUTT,FINDERT,FORMATTER T,FINDRESULTT,BOOST::ITERATOR_RANGE>(InputT &,FinderT,FormatterT,FindResultT,FormatResultT)' being compiled with [ InputT=const std::basic_string<WCHAR_T,STD::CHAR_TRAITS,std::allocator>, FinderT=boost::algorithm::detail::first_finderF<STD::_STRING_CONST_ITERA TOR<WCHAR_T,STD::CHAR_TRAITS,std::allocator>,boost::algorithm::is_equal> , FormatterT=boost::algorithm::detail::const_formatF<BOOST::ITERATOR_RANGE >, FindResultT=boost::iterator_range<STD::_STRING_CONST_ITERATOR<WCHAR_T,ST D::CHAR_TRAITS,std::allocator>>, IteratorT=const wchar_t *, FormatResultT=boost::iterator_range ] c:\program files\boost\boost\algorithm\string\find_format.hpp(254) : see reference to function template instantiation 'void boost::algorithm::detail::find_format_all_impl<SEQUENCET,FINDERT,FORMATT ERT,BOOST::ITERATOR_RANGE>(InputT &,FinderT,FormatterT,FindResultT)' being compiled with [ SequenceT=const std::basic_string<WCHAR_T,STD::CHAR_TRAITS,std::allocator>, FinderT=boost::algorithm::detail::first_finderF<STD::_STRING_CONST_ITERA TOR<WCHAR_T,STD::CHAR_TRAITS,std::allocator>,boost::algorithm::is_equal> , FormatterT=boost::algorithm::detail::const_formatF<BOOST::ITERATOR_RANGE >, IteratorT=std::_String_const_iterator<WCHAR_T,STD::CHAR_TRAITS,std::allo cator>, InputT=const std::basic_string<WCHAR_T,STD::CHAR_TRAITS,std::allocator>, FindResultT=boost::iterator_range<STD::_STRING_CONST_ITERATOR<WCHAR_T,ST D::CHAR_TRAITS,std::allocator>> ] c:\program files\boost\boost\algorithm\string\replace.hpp(657) : see reference to function template instantiation 'void boost::algorithm::find_format_all<SEQUENCET,BOOST::ALGORITHM::DETAIL::FI RST_FINDERF,boost::algorithm::detail::const_formatF>(SequenceT &,FinderT,FormatterT)' being compiled with [ SequenceT=const std::basic_string<WCHAR_T,STD::CHAR_TRAITS,std::allocator>, SearchIteratorT=std::_String_const_iterator<WCHAR_T,STD::CHAR_TRAITS,std ::allocator>, PredicateT=boost::algorithm::is_equal, RangeT=boost::iterator_range, FinderT=boost::algorithm::detail::first_finderF<STD::_STRING_CONST_ITERA TOR<WCHAR_T,STD::CHAR_TRAITS,std::allocator>,boost::algorithm::is_equal> , FormatterT=boost::algorithm::detail::const_formatF<BOOST::ITERATOR_RANGE > ] d:\work\access for everyone\ghg\tpproductssr\tpproductssr.cpp(41) : see reference to function template instantiation 'void boost::algorithm::replace_all,std::basic_string<_Elem,_Traits,_Ax>,const wchar_t[11]>(SequenceT &,const Range1T &,Range2T (&))' being compiled with [ _Elem=wchar_t, _Traits=std::char_traits, _Ax=std::allocator, SequenceT=const std::basic_string<WCHAR_T,STD::CHAR_TRAITS,std::allocator>, Range1T=std::basic_string<WCHAR_T,STD::CHAR_TRAITS,std::allocator>, Range2T=const wchar_t [11] ] c:\program files\boost\boost\algorithm\string\detail\find_format_all.hpp(255) : error C2664: 'boost::algorithm::detail::insert' : cannot convert parameter 2 from 'std::_String_const_iterator<_Elem,_Traits,_Alloc>' to 'std::_String_iterator<_Elem,_Traits,_Alloc>' with [ _Elem=wchar_t, _Traits=std::char_traits, _Alloc=std::allocator ] No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called Using visual c++ 2008 on a windows xp box, not that this (the o/s at least) matters. How can I avoid creating temporary variables in this case? Any help appreciated. Sean. __________ Information from ESET NOD32 Antivirus, version of virus signature database 4061 (20090507) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com

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Boost.Date_Time design questions
by Suman Kar 12 May '09

12 May '09

I am a little taken aback by the following: * date_time does not have a header-only version * there is no support for constructing a date from a wstring: I was really hoping 'from_string(std::string)' was a function template rather than an ordinary function taking only std::string. Can someone enlighten me with the rationale behind these? Regards, Suman

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[uuid] status?
by Mikko Vainio 12 May '09

12 May '09

Hi all, Is there any results of the mini-review process of the UUID library? Will the library be a part of boost anytime in the near future (say 1.40.0)? Cheers, Mikko

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