May 2010 - Boost-users - lists.boost.org

Variant bool bug
by Robin 21 May '10

21 May '10

Hi When I add a bool into the variant, the get int version fails (VC2008 SP1, boost 1.42.0, sorry earlier was mentioning wrong version 1.37.0) typedef boost::variant <bool, int, string> VariantType; VariantType variant; variant = "hello world"; string stringTest = boost::get <string> (variant); cout << stringTest.c_str () << endl; variant = 5; int intTest = boost::get <int> (variant); // Fails cout << intTest << endl; Robin

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Variant bool bug
by Robin 21 May '10

21 May '10

Hi When I add a bool into the variant, the get int version fails (VC2008 SP1, boost 1.37) typedef boost::variant <bool, int, string> VariantType; VariantType variant; variant = "hello world"; string stringTest = boost::get <string> (variant); cout << stringTest.c_str () << endl; variant = 5; int intTest = boost::get <int> (variant); // Fails cout << intTest << endl; Robin

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recursive variant with mpl::vector
by Surya Kiran Gullapalli 21 May '10

21 May '10

Hello all, I'm trying to create a recursive variant over an MPL vector.<http://?shva=1#drafts/128ba01f42cb2169> attached is the code. I'm trying to add a templated function isType, which will return true if the type stored in variant is the type queried for or false otherwise. This doesn't work for recursive types. In the example, I expect the program outputs "Map Type" because the type stored in the variant is a map. but it says the type is not map. The problem is mpl::contains returns false for map type. (The type stored in mpl vector is boost::recursive_wrapper< map ... >, where as, I'm querying for map...). what is the way forward from here. Thanks, Surya.

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Re: [Boost-users] unable to build boost graph 1.43 with gcc 3.4.5 (Adam Spargo)
by Vial, Florent 21 May '10

21 May '10

>Have you set your include path correctly? >-I"." >-I"libs/graph/src" >seems unlikely???? I ran ./bootstrap.sh ./bjam --build-dir="/tmp/boost_143.build.gcc34" threading=multi link=static runtime-link=shared --prefix="/usr/local/boost1430-gcc34" --without-mpi --without-python --without-serialization --without-test --without-wave address-model=64 -d+2 --layout=tagged cxxflags="-fPIC" -j8 Running the same 2 commands also fails building boost 1.42 with the same error, but successfully builds boost 1.41. Florent A new star is born - ALEXA the most versatile digital camera system. Get all the latest information from arridigital.com and YouTube.----------------------------------------------------------------------- On Thu, 20 May 2010, Vial, Florent wrote: > Hi, > > trying to build boost 1.43 with gcc 3.4.5, i obtain following error: > > "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall > -pthread -m64 -fPIC -DBOOST_ALL_NO_LIB=1 -DNDEBUG -I"." > -I"libs/graph/src" -c -o > "/tmp/boost_143.build.gcc34/boost/bin.v2/libs/graph/build/gcc-3.4.5/re > le ase/address-model-64/link-static/threading-multi/graphml.o" > "libs/graph/src/graphml.cpp" > ./boost/property_tree/detail/xml_parser_read_rapidxml.hpp: In function > `void > boost::property_tree::xml_parser::read_xml_internal(std::basic_istream > <t ypename Ptree::key_type::value_type, std::char_traits<typename > Ptree::key_type::value_type> >&, Ptree&, int, const std::string&) > [with Ptree = boost::property_tree::basic_ptree<std::string, > std::string, std::less<std::string> >]': > ./boost/property_tree/xml_parser.hpp:52: instantiated from `void > boost::property_tree::xml_parser::read_xml(std::basic_istream<typename > Ptree::key_type::value_type, std::char_traits<typename > Ptree::key_type::value_type> >&, Ptree&, int) [with Ptree = > boost::property_tree::ptree]' > libs/graph/src/graphml.cpp:49: instantiated from here > ./boost/property_tree/detail/xml_parser_read_rapidxml.hpp:108: error: > non-constant `(((int)f_c) | 3072)' cannot be used as template argument > ./boost/property_tree/detail/xml_parser_read_rapidxml.hpp:108: error: > no matching function for call to > `rapidxml::xml_document<char>::parse(char*)' > ...skipped > <p/tmp/boost_143.build.gcc34/boost/bin.v2/libs/graph/build/gcc-3.4.5/r > el > ease/address-model-64/link-static/threading-multi>libboost_graph-mt.a( > cl > ean) for lack of > <p/tmp/boost_143.build.gcc34/boost/bin.v2/libs/graph/build/gcc-3.4.5/r > el ease/address-model-64/link-static/threading-multi>graphml.o... > ...skipped > <p/tmp/boost_143.build.gcc34/boost/bin.v2/libs/graph/build/gcc-3.4.5/r > el > ease/address-model-64/link-static/threading-multi>libboost_graph-mt.a > for lack of > <p/tmp/boost_143.build.gcc34/boost/bin.v2/libs/graph/build/gcc-3.4.5/r > el ease/address-model-64/link-static/threading-multi>graphml.o... > ...skipped <pstage/lib>libboost_graph-mt.a for lack of > <p/tmp/boost_143.build.gcc34/boost/bin.v2/libs/graph/build/gcc-3.4.5/r > el > ease/address-model-64/link-static/threading-multi>libboost_graph-mt.a... > ...failed updating 1 target... > > any workaround coming to mind ? > > Thank you, > Florent Arnold & Richter Cine Technik GmbH & Co. Betriebs KG Sitz: Munchen - Registergericht: Amtsgericht Munchen - Handelsregisternummer: HRA 57918 Personlich haftender Gesellschafter: Arnold & Richter Cine Technik GmbH Sitz: Munchen - Registergericht: Amtsgericht Munchen - Handelsregisternummer: HRB 54477 Geschaftsfuhrer: Franz Kraus; Dr. Martin Prillmann

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[serialization] Is it possible to force newer boost-serialization to be compatible with older versions?
by Mariusz Wojtysiak 21 May '10

21 May '10

Hello, I implementing client-server application. Data sent between sites are serialized using boost-serialization as text archive. Unfortunately very often both client and server work on different operating systems and may be compiled with different boost versions :- ( I noticed that when boost-library versions are different on server and client, then archive_exception is thrown with message ""unsupported version". Is there a way to force serialization library to be compatible with older versions, e.g. by calling: archive.set_library_version() ? Regards, Mariusz Wojtysiak

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Re: [Boost-users] boost/numeric/ublas/matrix_sparse.hpp does not play well with RICE
by John O. Woods 20 May '10

20 May '10

I attempted to compile this -- #ifdef ValueType # undef ValueType #endif #ifdef key_equal # undef key_equal #endif #include <boost/unordered_map.hpp> int main() { return 0; } -- but no luck, same set of errors. Steven: I have preprocessor output, but no clue what to do with it. It's quite long. Thanks for your continued assistance, both of you. John

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Re: [Boost-users] [iostreams]Can I write data directly to the device of a stream?
by 鑫炜廖 20 May '10

20 May '10

BTW, what's the differences between stream and stream_buffer, filtering_stream and filtering_streambuf besides different base classes they derived from ? Their members look all the same...

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Re: [Boost-users] boost/numeric/ublas/matrix_sparse.hpp does not play well with RICE
by John Woods 20 May '10

20 May '10

The first error, with matrix_sparse, is 4.2.1 and 4.4.3 (two machines, one karmic and the other lucid). The unordered_map error I can confirm with 4.2.1, and shall try 4.4.3 later. How does one check preprocessor output? Many thanks, John

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[iostreams] boost::ostreams::file_descriptor_sink closing file handle
by Scott Quiring 20 May '10

20 May '10

Hi, I'm using file_descriptor_sink to obtain a stream to a given file handle. It's important that the file remain open past the lifetime of that object, so I send in false as the second parameter to the constructor (close_on_exit). It seems the file is being closed anyway. Here is an example: #include <iostream> #include <boost/iostreams/stream.hpp> #include <boost/iostreams/device/file_descriptor.hpp> int main(int argc, const char *argv[]) { std::cout << "foo" << std::endl; { boost::iostreams::stream<boost::iostreams::file_descriptor_sink> stream(fileno(stdout), false); stream << "bar" << std::endl; } std::cout << "baz" << std::endl; return 0; } Here we expect foo bar baz to be written, when only foo bar is written. Note that the output is the same regardless of whether true or false is sent into the constructor. Is this a boost bug, or is there something I'm missing here? I'm using gcc 4.3.4 on Ubuntu 10.04 if that makes any difference. Thanks, Scott Quiring

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boost/numeric/ublas/matrix_sparse.hpp does not play well with RICE
by John O. Woods 20 May '10

20 May '10

Hi there, Cross-posted this to the RICE listserv, but they cannot reproduce. I can reproduce it on karmic and lucid (ubuntu), separate machines, in boost 1.43.0. RICE is a C++ interface for Ruby (not unlike boost python). If I include boost numeric ublas matrix_sparse and either rice/Data_Type.hpp or rice/Constructor.hpp, I get a lot of errors -- even if I do nothing with them. For example, this works: #include <boost/numeric/ublas/matrix_sparse.hpp> int main() { return 0; } So does this: #include <rice/Data_Type.hpp> int main() { return 0; } But if I put both #includes in, it gives the following errors: $ make g++ -I. -I. -I/usr/lib/ruby/1.8/i486-linux -I. -D_FILE_OFFSET_BITS=64 -I/usr/lib/ruby/gems/1.8/gems/rice-1.3.2/ruby/lib/include -fPIC -fno-strict-aliasing -g -g -O2 -fPIC -Wall -g -c main.cpp In file included from /usr/local/include/boost/numeric/ublas/storage_sparse.hpp:23, from /usr/local/include/boost/numeric/ublas/vector_sparse.hpp:16, from /usr/local/include/boost/numeric/ublas/matrix_sparse.hpp:16, from main.cpp:5: /usr/local/include/boost/numeric/ublas/storage.hpp:60: error: expected primary-expression before ‘)’ token /usr/local/include/boost/numeric/ublas/storage.hpp:65: error: expected primary-expression before ‘)’ token /usr/local/include/boost/numeric/ublas/storage.hpp:79: error: expected primary-expression before ‘)’ token /usr/local/include/boost/numeric/ublas/storage.hpp: In member function ‘typename ALLOC::size_type boost::numeric::ublas::unbounded_array<T, ALLOC>::max_size() const’: /usr/local/include/boost/numeric/ublas/storage.hpp:174: error: expected primary-expression before ‘)’ token /usr/local/include/boost/numeric/ublas/storage.hpp:174: error: expected ‘;’ before ‘ruby_xmalloc’ /usr/local/include/boost/numeric/ublas/storage.hpp:174: error: expected primary-expression before ‘)’ token /usr/local/include/boost/numeric/ublas/storage.hpp: In member function ‘typename ALLOC::size_type boost::numeric::ublas::bounded_array<T, N, ALLOC>::max_size() const’: /usr/local/include/boost/numeric/ublas/storage.hpp:357: error: expected primary-expression before ‘)’ token /usr/local/include/boost/numeric/ublas/storage.hpp:357: error: expected ‘;’ before ‘ruby_xmalloc’ /usr/local/include/boost/numeric/ublas/storage.hpp:357: error: expected primary-expression before ‘)’ token In file included from /usr/local/include/boost/numeric/ublas/vector_sparse.hpp:16, from /usr/local/include/boost/numeric/ublas/matrix_sparse.hpp:16, from main.cpp:5: /usr/local/include/boost/numeric/ublas/storage_sparse.hpp: At global scope: /usr/local/include/boost/numeric/ublas/storage_sparse.hpp:240: error: expected primary-expression before ‘)’ token make: *** [main.o] Error 1 ruby_xmalloc does not seem to exist in that file, so I gather it's having some kind of syntax hiccup that is leaking into later #includes. Here are other relevant details: $ sudo gem list --local |grep rice rice (1.3.2, 1.3.1) I seem to get the same bug with both boost 1.41 and boost 1.43, though sometimes I have trouble telling which one I'm including. Should this be a bug report, or am I missing something stupid? *(I'd be eternally grateful if you'd reply to me as well as to the list.)* Thanks so much, John PS: extconf.rb below. Works fine for other projects, as long as I don't use matrix_sparse. require 'rubygems' require 'mkmf-rice' dir_config("boost") have_library("stdc++") have_library("boost") have_library("boost_filesystem") if RUBY_VERSION =~ /1.9/ then $CPPFLAGS += " -DRUBY_19" end create_makefile('main') -- John Woods Marcotte Lab Center for Systems and Synthetic Biology The University of Texas at Austin

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