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question about converting boostbook into quickbook
by Faruk Kuşcan 15 Feb '11

15 Feb '11

Hello, I have a boostbook xml document named abcde.boostbook. Now I want this document in qbk format. What command should I use to do that? abcde.boostbook > abcde.qbk ??? Thanks for your help. Faruk

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Most recent version of Boost supporting MSVC6
by Kerry, Richard 14 Feb '11

14 Feb '11

Can someone tell me which is the most recent version of Boost to support Microsoft Visual C++ 6 ? In particular the Regular Expression module - Regex. I have read a discussion (in Boost Archives on groups.google.com) from September last year which indicates that current (1.45) Boost doesn't support VC6, but no-one there states when the support ceased. The Boost web-site doesn't make this clear either, and nor does BoostPro's download page. Regards, Richard. Richard Kerry BNCS Engineer Siemens IT Solutions and Services Ltd The Business Technologists Room 457 Drama Building, BBC Television Centre, Wood Lane, London, W12 7RJ T: +44 (0)20 82259063 F: +44 (0)20 8576 8182 M: +44 (0)7921 244993 Email: richard.kerry(a)siemens.com<blocked::mailto:richard.kerry@siemens.com> Website: www.siemens.co.uk/it-solutions<blocked::outbind://47/www.siemens.co.uk/it-solutions> This e-mail contains confidential information and is for the exclusive use of the addressee/s. If you are not the addressee, then any distribution, copying or use of this e-mail is prohibited. If received in error, please advise the sender and delete it immediately. We accept no liability for any loss or damage suffered by any person arising from use of this e-mail. Siemens IT Solutions and Services Limited Registered No: 1203466 England Registered Office: Faraday House, Sir William Siemens Square, Frimley, Camberley, GU16 8QD

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[intrusive] unordered_set::iterator_to
by Paul Rose 14 Feb '11

14 Feb '11

Hi, I'm getting compile errors trying to use iterator_to() on an unordered_set when given a const reference (and returning a const_iterator). It works fine for me with ordered set. I am able to reproduce this error by adding the following two lines: MyClass const &cr = values[0]; base_set.iterator_to(cr); to the bottom of the Example code (just before the return 0 from main) for unordered_set at: http://www.boost.org/doc/libs/1_45_0/doc/html/intrusive/unordered_set_unord… The error is: /opt/boost/include/boost-1_38/boost/intrusive/hashtable.hpp: In member function ‘boost::intrusive::detail::hashtable_iterator<boost::intrusive::hashtable_impl<Config>, true> boost::intrusive::hashtable_impl<Config>::iterator_to(typename std::iterator_traits<typename boost::intrusive::detail::eval_if_c<boost::intrusive::hashtable_impl<Config>::external_value_traits, boost::intrusive::detail::eval_value_traits<typename Config::value_traits>, boost::intrusive::detail::identity<typename Config::value_traits> >::type::const_pointer>::reference) const [with Config = boost::intrusive::detail::usetopt<boost::intrusive::detail::base_hook_traits<MyClass, boost::intrusive::slist_node_traits<void*>, safe_link, boost::intrusive::default_tag, 4>, boost::hash<MyClass>, std::equal_to<MyClass>, long unsigned int, boost::intrusive::detail::bucket_traits_impl<boost::intrusive::detail::get_slist_impl<boost::intrusive::slist_node_traits<void*> >::type>, 3ul>]’: /opt/boost/include/boost-1_38/boost/intrusive/unordered_set.hpp:733: instantiated from ‘typename boost::intrusive::hashtable_impl<Config>::const_iterator boost::intrusive::unordered_set_impl<Config>::iterator_to(typename boost::intrusive::hashtable_impl<Config>::const_reference) const [with Config = boost::intrusive::detail::usetopt<boost::intrusive::detail::base_hook_traits<MyClass, boost::intrusive::slist_node_traits<void*>, safe_link, boost::intrusive::default_tag, 4>, boost::hash<MyClass>, std::equal_to<MyClass>, long unsigned int, boost::intrusive::detail::bucket_traits_impl<boost::intrusive::detail::get_slist_impl<boost::intrusive::slist_node_traits<void*> >::type>, 3ul>]’ example.cpp:82: instantiated from here /opt/boost/include/boost-1_38/boost/intrusive/hashtable.hpp:1682: error: no matching function for call to ‘boost::intrusive::detail::hashtable_iterator<boost::intrusive::hashtable_impl<boost::intrusive::detail::usetopt<boost::intrusive::detail::base_hook_traits<MyClass, boost::intrusive::slist_node_traits<void*>, safe_link, boost::intrusive::default_tag, 4>, boost::hash<MyClass>, std::equal_to<MyClass>, long unsigned int, boost::intrusive::detail::bucket_traits_impl<boost::intrusive::detail::get_slist_impl<boost::intrusive::slist_node_traits<void*> >::type>, 3ul> >, true>::hashtable_iterator(boost::intrusive::slist_iterator<boost::intrusive::slist_impl<boost::intrusive::slistopt<boost::intrusive::trivial_value_traits<boost::intrusive::slist_node_traits<void*>, normal_link>, long unsigned int, false, false, false> >, true>, const boost::intrusive::hashtable_impl<boost::intrusive::detail::usetopt<boost::intrusive::detail::base_hook_traits<MyClass, boost::intrusive::slist_node_traits<void*>, safe_link, boost::intrusive::default_tag, 4>, boost::hash<MyClass>, std::equal_to<MyClass>, long unsigned int, boost::intrusive::detail::bucket_traits_impl<boost::intrusive::detail::get_slist_impl<boost::intrusive::slist_node_traits<void*> >::type>, 3ul> >* const)’ I am using 1_38_0. I have not yet tried 1_45_0, but I have gone through the entire list of fixed bugs on the release notes between 1_38 and 1_45. I'll try 1_45_0 in the next few days, just in case. I am able to work around my issue by casting away const on my reference before calling iterator_to and assigning the result back into a const_iterator, so for me it is nothing more than an annoyance, but I thought I'd bring it to your attention so it can be fixed in a future release. Thanks, Paul Rose

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[signals2] Removal of 'unused variable' warnings
by sguazt 14 Feb '11

14 Feb '11

Dear Signals2 developers, I get an unused variable warning from my compiler (g++ 4.5.1, with flags "-Wall -Wextra -ansi -pedantic") at lines 510 and 515 of file "boost/signals2/detail/signal_template.hpp". The warning is issued for the parameter "is_group" which is not used any more. Please, could you fix it? Possible solutions: a) Add a comment around the parameter name: void do_disconnect(const group_type &group, mpl::bool_<true> /*is_group*/) ... template<typename T> void do_disconnect(const T &slot, mpl::bool_<false> /*is_group*/) b) Add a void statement: void do_disconnect(const group_type &group, mpl::bool_<true> is_group) { (void)is_group; } template<typename T> void do_disconnect(const T &slot, mpl::bool_<false> is_group) { (void)is_group; ... } Thank you very much in advance!! Best, -- Marco

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Visual Studio 2010 Building Error
by Abdullah García 14 Feb '11

14 Feb '11

Hi, I have been working previously with Visual Studio 2008 and I haven't had any problem with my actual code. I needed to migrate my whole solution to Visual Studio 2010 and now I get the following error: - error C2664: 'boost::shared_ptr<T>::shared_ptr(boost::shared_ptr<T> &&)' : cannot convert parameter 1 from 'std::tr1::shared_ptr<_Ty>' to 'boost::shared_ptr<T> &&' Do you have any clue or advice on how to solve it? Greetings! -- Abdullah García

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TTI library updated in the sandbox to version 1.3
by Edward Diener 13 Feb '11

13 Feb '11

I have updated the TTI library in the sandbox 'tti' directory to version 1.3. The TTI library, which is an abbreviation for the 'Type Traits Introspection' library, allows a programmer to introspect at compile time the inner elements of a C++ type. The introspection process depends on specifying the name of the inner element by different macros for different types of elements, and then using a generated metafunction to determine whether that element exists within the enclosing type. The inner elements which can be introspected are type, class template, member data, member function, static member data, and static member function. With this update no functionality in the library has changed, but names have changed. The major change is that the library has been Boostified for possible review. 1) The update changes the library to use the Boost naming conventions. 2) The names of the main header files have been shortened and changed to 'tti.hpp' and 'tti_vm.hpp' respectively. 3) The macros in the library now start with BOOST_TTI. 4) The main namespace is now boost::tti. 5) Other filenames now follow Boost filename convention. 6) The documentation is distributed in both HTML and PDF format with indexes, and can be regenerated. 7) The variadic macro support in the library only works with the latest version 1.3+ of the variadic_maco_data library in the sandbox. The TTI library is based on the type_traits_ext portion of the Concept Traits Library, with improvements and additions, and also reproduces functionality ( without changing existing code ), for the purposes of completeness, from Boost.MPL regarding introspection of types and templates. The purpose of the library is to provide a consistent set of interfaces for doing compile-time introspection of a type, which other template metaprogrammers can use in their code. If you are at all interested in compile-time introspection of types, please take a look at the functionality of this library. There is a readme.txt in the top-level directory, for anyone browsing the sandbox. There is a build.txt file in the doc subdirectory for building the documentation and running the tests. The documentation is also included as part of the sandbox files for those who can not build the docs. The library has been tested and works with gcc 3.4.2, 3.4.5, 4.3.0, 4.4.0, 4.5.0-1, 4.5.2-1 and VC++ 8.0, 9.0, 10.0. It may also work with other compilers. Questions, comments, suggestions, and bug reports are all welcome.

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[asio] Run-time error with asio::streambuf
by Dylan Klomparens 13 Feb '11

13 Feb '11

I've experienced problems using asio::streambuf and am hoping someone can tell me if I'm using the class incorrectly. When I run this example code it segfaults. Why? To make things more confusing, this code works on Windows (Visual Studio 2008), but does not work on Linux (with gcc 4.4.1). -- Dylan #include <boost/asio.hpp> using namespace std; int main() { boost::asio::streambuf Stream; // Put 4 bytes into the streambuf... int SetValue = 0xaabbccdd; Stream.sputn(reinterpret_cast<const char*>(&SetValue), sizeof(SetValue)); // Consume 3 of the bytes... Stream.consume(3); cout << Stream.size() << endl; // should output 1 // Get the last byte... char GetValue; // -------------------------- The next line segfaults the program -------------------------- Stream.sgetn(reinterpret_cast<char*>(&GetValue), sizeof(GetValue)); cout << Stream.size() << endl; // should output 0 return 0; }

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Extra copy construction in boost::as_literal
by Sergey Nozhenko 13 Feb '11

13 Feb '11

Hi, Looking at the code generated by MSVC++ 2008 from a call to boost::algorithms::replace_all with std::wstrings as arguments I came across this remarkable piece of work: === cut === ; 109 : return range_detail::make_range( r, range_detail::is_char_ptr(r) ); xor eax, eax push -1 mov WORD PTR $T115029[esp+44], ax push eax mov eax, edi lea ecx, DWORD PTR $T115029[esp+44] mov DWORD PTR $T115029[esp+68], 7 mov DWORD PTR $T115029[esp+64], 0 call ?assign@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator... cmp DWORD PTR $T115029[esp+60], 8 jb SHORT $LN52@as_literal mov ecx, DWORD PTR $T115029[esp+40] push ecx call ??3@YAXPAX@Z ; operator delete ... === cut === Checked it with g++ -O2 and found that it produced something similar: === cut === 109:.../boost/boost/range\as_literal.hpp **** return range_detail::make_range( r, range_detail::is_char_ptr(r) ); leal 168(%esp), %ebx movl %ebx, 4(%esp) leal 164(%esp), %eax movl %eax, (%esp) call __ZNSbIwSt11char_traitsIwESaIwEEC1ERKS2_ movl 168(%esp), %eax movl %eax, 44(%esp) movl -12(%eax), %edx movl %edx, 52(%esp) movl 164(%esp), %eax leal -12(%eax), %ebx cmpl $__ZNSbIwSt11char_traits..._Rep20_S_empty_rep_storageE, %ebx jne L412 L284: ... L412: movl 8(%ebx), %eax leal -1(%eax), %edx movl %edx, 8(%ebx) testl %eax, %eax jg L284 leal 188(%esp), %eax movl %eax, 4(%esp) movl %ebx, (%esp) call __ZNSbIwSt11char_traitsIwESaIwEE4_Rep10_M_destroyERKS1_ jmp L284 === cut === I.e., even with the optimization turned on, a call to "inline" function template< class T > inline long is_char_ptr( T /* r */ ) { return 0L; } in boost/range/as_literal.hpp causes the creation of a temporary copy of every string passed to boost::as_literal. :( I believe it would have been better to define that function as template< class T > inline long is_char_ptr(const T& /* r */ ) { return 0L; } Serge

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[graph] edge container for fast indexing by (bundled) property
by al.zatv 13 Feb '11

13 Feb '11

Hello! I have a question about Graph library. Let say I have a tree. Nodes of it are english letters. For example, A-->B-->X-->C, +-->A +-->D-->X I want to find sub-node of any node, by specifying the letter. Is it possible? For example, I'am in node B. And I want to find edge and node, by just saying "give me sub-node from B to the letter D". Looks like I have to write own EdgeContainer? Now I did it silly check every sub-node: *** typedef adjacency_list<listS,listS,bidirectionalS,NodeData> Lattice; typedef Lattice::vertex_descriptor VertexDesc; typedef Lattice::edge_descriptor EdgeDesc; std::tuple<bool,VertexDesc,EdgeDesc> get_sub_letter(const VertexDesc &n,char letter,const Lattice &lat) { auto outs=out_edges(n,lat); auto it=outs.first; for (;it!=outs.second;++it) { VertexDesc targetNode=target(*it,lat); if (lat[targetNode].letter==letter) return std::make_tuple(true,targetNode,*it); } return std::make_tuple(false,5,n,*it); } ***

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[fusion][docs] is_sequence *isnt* true for std::vector ?
by Martin Elzen 12 Feb '11

12 Feb '11

Hi all. I've been looking thru the documentation at boost.org to try to understand Boost.Spirit. That documentation refers to Boost.Fusion, and at http://www.boost.org/doc/libs/1_45_0/libs/fusion/doc/html/fusion/support/is… there's something I think needs clarification (at the very least), or is mistaken. The first line of the last paragraph of that page contains the following line:BOOST_MPL_ASSERT_NOT(( traits::is_sequence< std::vector<int> > )); I don't understand. How can a std::vector *not* be considered a sequence? Martin

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