- Boost-users - lists.boost.org

[BGL] Graph syntax from Boost 1_31
by Lucio Flores 19 Nov '07

19 Nov '07

Because of compiler issues, and reasons too numerous to be listed here, for this problem I'm currently stuck using MSVC 7.1, with the Boost Graph Library 1_31. I'm having a syntax problem that I thought someone could help me with. I'm trying to use the graph coloring algorithm by calling sequential_vertex_coloring. In version 1_31, the function signature look like the following: template <class VertexListGraph, class OrderPA, class ColorMap> typename graph_traits<VertexListGraph>::size_type sequential_vertex_coloring(const VertexListGraph& G, OrderPA order, ColorMap color) ; I'm not entirely certain what the OrderPA is supposed to be. I could see in Boost version 1_33, there was a convenience function that automatically created the 'order' argument. So I tried using that, but I got the following error: main.cpp(31) : error C2893: Failed to specialize function template 'graph_traits<VertexListGraph>::size_type boost::sequential_vertex_coloring(const VertexListGraph &,OrderPA,ColorMap)' With the following template arguments: 'Graph' 'boost::iterator_property_map<RandomAccessIterator,IndexMap,T,R>' Can somene tell me what I'm missing or doing wrong? Much appreciated. I've enclosed the code below. ----------------------------------------------------------- #include <boost/graph/adjacency_list.hpp> #include <boost/graph/sequential_vertex_coloring.hpp> template<class VertexListGraph, class ColorMap> typename boost::property_traits<ColorMap>::value_type sequential_vertex_coloring(const VertexListGraph& G, ColorMap color) { typedef typename boost::graph_traits<VertexListGraph>::vertex_descriptor vertex_descriptor; typedef typename boost::graph_traits<VertexListGraph>::vertex_iterator vertex_iterator; std::pair<vertex_iterator, vertex_iterator> v = vertices(G); #ifndef BOOST_NO_TEMPLATED_ITERATOR_CONSTRUCTORS std::vector<vertex_descriptor> order(v.first, v.second); #else std::vector<vertex_descriptor> order; order.reserve(std::distance(v.first, v.second)); while (v.first != v.second) order.push_back(*v.first++); #endif return boost::sequential_vertex_coloring (G, boost::make_iterator_property_map (order.begin(), boost::identity_property_map(), boost::graph_traits<VertexListGraph>::null_vertex()), color); } typedef boost::adjacency_list<boost::listS, boost::vecS, boost::undirectedS> Graph; typedef boost::graph_traits<Graph>::vertex_descriptor vert_descriptor; typedef boost::graph_traits<Graph>::vertex_iterator vert_iterator; typedef boost::graph_traits<Graph>::vertices_size_type vert_size_type; typedef boost::property_map<Graph, boost::vertex_index_t>::const_type vert_index_map; int main(int argc, char **argv) { Graph g(5); boost::add_edge(0, 1, g); boost::add_edge(0, 2, g); boost::add_edge(1, 2, g); std::vector<vert_size_type> color_vec(5); boost::iterator_property_map<vert_size_type*, vert_index_map> color(&color_vec.front(), get(boost::vertex_index, g)); vert_size_type num_colors = sequential_vertex_coloring (g, color); return 0; } --------------------------------- Be a better sports nut! Let your teams follow you with Yahoo Mobile. Try it now.

1 0

Boost.Serialization: error checking
by Christoph 19 Nov '07

19 Nov '07

I am experimenting with Boost.Serialization. I tried to de-serialize a (binary) file written for a *different* class. Obviously, this can not work. However, there is not thrown an exception. Question: (How) can I determine that the reading failed? (In case of corrupted or non-matching archives.) (I have attached a small demo.) Best regards Christoph

9 14

[python] std::list export
by Gennadiy Rozental 18 Nov '07

18 Nov '07

How do I export std::list, so I can iterate over it in for statement? Gennadiy

2 1

[lambda][tuple] how to combine lambda with tuple ?
by Kamil Zubair 18 Nov '07

18 Nov '07

I'm using VC++ Express 2005 with boost 1.34. I'm just trying to use lambda to compare one of the tuple element with some value as find_if predicate but it failed. The code is : --appropriate #include's using namespace std; using namespace boost; using namespace boost::lambda; using namespace boost::tuples; typedef tuple<string, string, int> data; int main(int argc, char* argv[]) { vector<data> v; v.push_back(data("John","William",12)); find_if(v.begin(), v.end(), bind(&data::get<0>, _1) == "John" ); return 0; } And the error message is: 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<10,boost::lambda::function_action<10,T>>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8,const Arg9,const Arg10>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &,const Arg9 &,const Arg10 &)' : expects 10 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(1743) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8,const Arg9,const Arg10>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &,const Arg9 &,const Arg10 &)' : expects 10 arguments - 2 provided 1> with 1> [ 1> Arity=10, 1> Act=boost::lambda::function_action<10> 1> ] 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(1710) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<10,boost::lambda::function_action<10,T>>,detail::bind_tuple_mapper<Result(__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6,Par7,Par8,Par9),const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8,const Arg9,const Arg10>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6,Par7,Par8,Par9),const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &,const Arg9 &,const Arg10 &)' : expects 10 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(1673) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<9,boost::lambda::function_action<9,T>>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8,const Arg9>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &,const Arg9 &)' : expects 9 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(1526) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8,const Arg9>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &,const Arg9 &)' : expects 9 arguments - 2 provided 1> with 1> [ 1> Arity=9, 1> Act=boost::lambda::function_action<9> 1> ] 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(1494) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<9,boost::lambda::function_action<9,T>>,detail::bind_tuple_mapper<Result(__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6,Par7,Par8),const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8,const Arg9>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6,Par7,Par8),const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &,const Arg9 &)' : expects 9 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(1458) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<8,boost::lambda::function_action<8,T>>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &)' : expects 8 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(1322) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &)' : expects 8 arguments - 2 provided 1> with 1> [ 1> Arity=8, 1> Act=boost::lambda::function_action<8> 1> ] 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(1291) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<8,boost::lambda::function_action<8,T>>,detail::bind_tuple_mapper<Result(__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6,Par7),const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6,Par7),const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &)' : expects 8 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(1257) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<7,boost::lambda::function_action<7,T>>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &)' : expects 7 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(1123) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &)' : expects 7 arguments - 2 provided 1> with 1> [ 1> Arity=7, 1> Act=boost::lambda::function_action<7> 1> ] 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(1092) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<7,boost::lambda::function_action<7,T>>,detail::bind_tuple_mapper<Result(__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6),const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6),const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &)' : expects 7 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(1058) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<6,boost::lambda::function_action<6,T>>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &)' : expects 6 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(927) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &)' : expects 6 arguments - 2 provided 1> with 1> [ 1> Arity=6, 1> Act=boost::lambda::function_action<6> 1> ] 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(899) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<6,boost::lambda::function_action<6,T>>,detail::bind_tuple_mapper<Result(__cdecl &)(Par1,Par2,Par3,Par4,Par5),const Arg2,const Arg3,const Arg4,const Arg5,const Arg6>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3,Par4,Par5),const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &)' : expects 6 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(867) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<5,boost::lambda::function_action<5,T>>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &)' : expects 5 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(738) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &)' : expects 5 arguments - 2 provided 1> with 1> [ 1> Arity=5, 1> Act=boost::lambda::function_action<5> 1> ] 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(710) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<5,boost::lambda::function_action<5,T>>,detail::bind_tuple_mapper<Result(__cdecl &)(Par1,Par2,Par3,Par4),const Arg2,const Arg3,const Arg4,const Arg5>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3,Par4),const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &)' : expects 5 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(679) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<4,boost::lambda::function_action<4,T>>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &)' : expects 4 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(558) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &)' : expects 4 arguments - 2 provided 1> with 1> [ 1> Arity=4, 1> Act=boost::lambda::function_action<4> 1> ] 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(532) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<4,boost::lambda::function_action<4,T>>,detail::bind_tuple_mapper<Result(__cdecl &)(Par1,Par2,Par3),const Arg2,const Arg3,const Arg4>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3),const Arg2 &,const Arg3 &,const Arg4 &)' : expects 4 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(503) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3,boost::lambda::function_action<3,T>>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &)' : expects 3 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(387) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &)' : expects 3 arguments - 2 provided 1> with 1> [ 1> Arity=3, 1> Act=boost::lambda::function_action<3> 1> ] 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(361) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<3,boost::lambda::function_action<3,T>>,detail::bind_tuple_mapper<Result(__cdecl &)(Par1,Par2),const Arg2,const Arg3>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2),const Arg2 &,const Arg3 &)' : expects 3 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(333) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2,T>>,detail::bind_tuple_mapper<const Arg1,const Arg2>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(232) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2,T>>,detail::bind_tuple_mapper<const Arg1,const Arg2>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(232) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2,T>>,detail::bind_tuple_mapper<const Arg1,const Arg2>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(232) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' 1> with 1> [ 1> Arity=2, 1> Act=boost::lambda::function_action<2> 1> ] 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(212) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' 1> with 1> [ 1> Arity=2, 1> Act=boost::lambda::function_action<2> 1> ] 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(212) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' 1> with 1> [ 1> Arity=2, 1> Act=boost::lambda::function_action<2> 1> ] 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(212) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2,T>>,detail::bind_tuple_mapper<Result(__cdecl &)(Par1),const Arg2>::type>> boost::lambda::bind(Result (__cdecl &)(Par1),const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(190) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2,T>>,detail::bind_tuple_mapper<Result(__cdecl &)(Par1),const Arg2>::type>> boost::lambda::bind(Result (__cdecl &)(Par1),const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(190) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2,T>>,detail::bind_tuple_mapper<Result(__cdecl &)(Par1),const Arg2>::type>> boost::lambda::bind(Result (__cdecl &)(Par1),const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(190) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<1,boost::lambda::function_action<1,T>>,detail::bind_tuple_mapper<const Arg1>::type>> boost::lambda::bind(const Arg1 &)' : expects 1 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(91) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1>::type>> boost::lambda::bind(const Arg1 &)' : expects 1 arguments - 2 provided 1> with 1> [ 1> Arity=1, 1> Act=boost::lambda::function_action<1> 1> ] 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(71) : see declaration of 'boost::lambda::bind' 1>d:\project\simple\file transfer\tuple\tuple.cpp(16) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<1,boost::lambda::function_action<1,T>>,detail::bind_tuple_mapper<Result(__cdecl &)(void)>::type>> boost::lambda::bind(Result (__cdecl &)(void))' : expects 1 arguments - 2 provided 1> d:\library\boost_1_34_1\boost\lambda\detail\bind_functions.hpp(49) : see declaration of 'boost::lambda::bind' --------------------------------- Never miss a thing. Make Yahoo your homepage.

1 0

[python] erase element from dict
by Gennadiy Rozental 17 Nov '07

17 Nov '07

How do I do the subject? Gennadiy

2 4

[python] relative operators export
by Gennadiy Rozental 17 Nov '07

17 Nov '07

Let's say I've got class A {...} and I've implemented operator<(A,A). How can I export all the operators similarly to what boost::operators doing in one shot? Gennadiy

2 3

[multiindex] [bind] Conversion loses qualifiers
by Nebojsa Simic 17 Nov '07

17 Nov '07

Hello all, First of all, thanks for a wonderful library, it is a pleasure to work with... However I ran into some problems and I can not find the answers either on the Internet nor on this mailing list. The problem at hand concerns the multiindex container and bind. I have a class with the following member: class Statistics { public: void addStats ( double val, int tick ); } and a container: typedef multi_index_container< Statistics, indexed_by <ordered_unique<identity<Statistics> >, ordered_non_unique< member<Statistics,double,&Statistics::gamma> > > > StatisticsMap; StatisticsMap m_statistic; indexed by : typedef StatisticsMap::nth_index<1>::type StatisticsByResponse; somewhere in code i try to do this : std::pair<StatisticsMap::iterator,bool> result = m_statistic.insert( Statistics( response, value, tick ) ); StatisticsByResponse& idxResponse = m_statistic.get<1>(); StatisticsByResponse::iterator it = m_statistic.project<1>(result.first ); the problem comes when I try to update the statistics by using : for_each( it , idxResponse.end() , boost::bind( &Statistics::addStats, ::_1, val, tick ) ); " ... \boost\boost\bind\mem_fn_template.hpp(260) : error C2440: 'argument' : cannot convert from 'const boost::multi_index::detail::index_node_base<Value>::value_type *' to 'Statistics *const ' with [ Value=Statistics ] Conversion loses qualifiers boost\boost\bind.hpp(347) : see reference to function template instantiation 'R boost::_mfi::mf2<R,T,A1,A2>::operator ()<Statistics>(const U &,A1,A2) const' being compiled with [ R=void, T=Statistics, A1=double, A2=int, U=boost::multi_index::detail::index_node_base<Statistics>::value_type ] .... " I see the problem is that compiler tries to convert Statistics* into Statistics* const, but I do not know how to fix it .. -- Nebojsa Simic

2 8

circular_buffer iterator validation
by Abir Basak 17 Nov '07

17 Nov '07

Hi, One more question, what is the rule for circular buffer iterator validation ? Though I had gone through the document, and which gives some rule related to this, I need to know a few thing like this , I have a buffer which has enough memory to store all, the elements I push onto it. Thus no memory re-allocation is needed (it is fixed buffer, not the space optimized one), and no memory overwriting when it is full, and thus no debug time assert due to that. int_buf buf(5); buf.push_back(1); buf.push_back(2); int_buf::const_iterator ite = buf.end(); int_buf::const_iterator itb = ite-2; buf.push_back(3); buf.push_back(4); std::for_each(itb,ite,std::cout<<_1<<"\t"); This case, I expect the iterators should not be invalidated, and print 1 2 However it prints 1 2 3 4. Why it is so ? I need to push a few elements at a time to the buffer, and store a boost::sub_range for this eg itb ,ite. and pop_front the same chunk. I can make ensure that the buffer never gets full. WIll it be possible in any way to store such iterator pair (I can't do this to deque as that allocates memory and invalidates iterators)? Any other way the same can be achieved (eg using some container aware iterator pair, or container adapter)? I am also interested to the same for circular_buffer_space_optimized, where memory allocation might occur, when minimum memory limit is exhausted, but can ensure that never it is full (i.e no overwrite occurs). any boost library will help for that , where iterator invalidation occurs only due to memory movement, not due to invalid element location? Thanking you. abir basak -- Abir Basak, Member IEEE B. Tech , IIT KGP Software Engineer, Read Ink Technologies

1 0

MPL Map of types to integral values
by Robert Dailey 17 Nov '07

17 Nov '07

Hi, I'm looking for a complete compile-time constant map container that uses types as keys and integral constants as values. For example: typedef map< pair<float, 90>, pair<unsigned int, 3> > mapType; unsigned int value = get_value<mapType, float>::value; The above code is PSEUDO CODE only. It is supposed to give you an idea of what I'm looking for. I tried using boost::fusion::map, however the fusion::pair object expects a TYPE as the second template argument, so I can't specify integral values. Could someone provide a code example that achieves the above? Note that I should be able to do the following as well: typedef map< pair<float, 90>, pair<unsigned int, 3> > mapType; class foo { // This would result in 'value' being the integral number 90. static const unsigned int value = get_value<mapType, float>::value; }

2 4

some circular_buffer related question.
by Abir Basak 17 Nov '07

17 Nov '07

Respected Sir, I am using boost::circular_buffer in my program. It uses Visual Studio 7.1 . I am facing some problem related to iterator const correctness, where a nonconst iterator can't be converted to const iterator in release mode only (it works fine in debug mode) The program demosntrates it , #include <boost/circular_buffer.hpp> #include <boost/lambda/lambda.hpp> #include <iostream> int main(){ using namespace boost; using namespace boost::lambda; typedef circular_buffer<int> int_buf; int_buf buf(3); buf.push_back(1); buf.push_back(2); buf.push_back(3); buf.push_back(4); int_buf::const_iterator itb = buf.begin(); int_buf::const_iterator ite = buf.end(); std::for_each(itb,ite,std::cout<<_1<<"\t"); } It gives error in release mode of VS 7.1 as, e:\boost\trunk\boost\circular_buffer\details.hpp(262): error C2248: 'boost::cb_details::iterator<Buff,Traits>::m_buff' : cannot access private member declared in class 'boost::cb_details::iterator<Buff,Traits>' with [ Buff=boost::circular_buffer<int>, Traits=boost::cb_details::nonconst_traits<std::allocator<int>> ] and [ Buff=boost::circular_buffer<int>, Traits=boost::cb_details::nonconst_traits<std::allocator<int>> ] The boost version is latest boost svn trunk download. Apparently it seems, a friend declaration is missing, which causes the error in iterator to const iterator conversion through iterator(const nonconst_self& it) constructor conversion , where it tries to access it.m_it private variable. My second question is, is it valid to pass a const & a non const iterator to any function such as std::for_each, where both const iterators are required. If I pass such thing, it gives error as d:\Visual Studio Projects\Test\Test1.cpp(15): error C2782: '_Fn1 std::for_each(_InIt,_InIt,_Fn1)' : template parameter '_InIt' is ambiguous It it a valid error, or it is supposed to convert a non const iterator to const one, and match the template parameter, if it directly doesnt match anyone (as the conversion ctor is not explicit, I expect such automatic conversion is possible). thank you for such a fantastic library . -- Abir Basak, Member IEEE B. Tech , IIT KGP Technology Lead Software Engineer, Read Ink Technologies

1 0