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

[boost-users] pointers container library generic function.
by chun ping wang 20 Nov '07

20 Nov '07

HI i would I write a generic function as template parameter that accepts any kind of boost pointers containers library. like for example. template <typename T, template <typename ELEM, typename = std::allocator<ELEM> > class CONT > extern typename boost::enable_if<boost::mpl::or_<boost::is_integral<T>, boost::is_convertible<T, unsigned long> >, CONT<T> >::type str_to_numlist(const std::string&, const T&); accept any vector, list, deque.. i want to replace vector list, deque with ptr_vector, ptr_list, ptr_deque.. etc.

1 0

[multi-index] dereferencing the end iterator
by Ovanes Markarian 20 Nov '07

20 Nov '07

Hello Joaquín, today I faced some problem, when debugging the code. namespace mi = boost::multi_index; typedef mi::multi_index_container < vx_type , mi::indexed_by < mi::hashed_unique<mi::tag<vx_hash>, hash_extractor, dummy_hasher> , mi::ordered_non_unique<mi::tag<vx_kind>, kind_extractor > > > some_t; When created a view for vx_hash tag and going to change the invalid iterator like view.end(). Dereferencing view.end() fails as awaited, but this code which calls my TypeModifier: view.modify(view.end(), my_modifier); This will result in my_modifier call with dereferenced iterator, which contains badly initialized object. My environment VC++ 2005 Express, boost 1.34.1 With Kind Regards, Ovanes

2 5

[vector_property_map] vector size ?
by Jairo19＠interhosting.us 20 Nov '07

20 Nov '07

1 0

Re: [Boost-users] [boost] C++ Performance
by Maik Beckmann 20 Nov '07

20 Nov '07

Forwarded to boost-users... Am Dienstag 20 November 2007 16:24:42 schrieb nisha kannookadan: > Hi everybody > > Im a quite new boost user and I wonder, why C++ Program is so slow. > > I wrote a program, and I have the same program in Matlab, > I expected that my C++ version is much faster, but its not. > > I use matrices, vectors, matrix- and vector proxies. Do some > solving and compute calculations with prod, element_div, etc.. > > Is boost in general slower than matlab, should I use something > else? > > Id be real happy about any help. > > Regards > Nisha K > _________________________________________________________________ > Explore the seven wonders of the world > http://search.msn.com/results.aspx?q=7+wonders+world&mkt=en-US&form=QBRE > _______________________________________________ > Unsubscribe & other changes: > http://lists.boost.org/mailman/listinfo.cgi/boost

2 2

Re: [Boost-users] [filesystem] List all drive letters
by arno.schaefer＠sqs.de 20 Nov '07

20 Nov '07

> No, that's not currently possible. What is then the best way, to find all windows roots with the current version? Have you some example code? --Arno

2 1

Problem in using Transitive_closure on Linux
by abhishek.v＠tcs.com 20 Nov '07

20 Nov '07

Hi.. I m able to run transitive_closure on my windows machine but the same program gives me the following error on Linux machine what can be the reason for this .. /usr/include/boost/graph/depth_first_search.hpp: In function âvoid boost::depth_first_search(const VertexListGraph&, const boost::bgl_named_params<P, T, R>&) [with VertexListGraph = std::vector<std::vector<long unsigned int, std::allocator<long unsigned int> >, std::allocator<std::vector<long unsigned int, std::allocator<long unsigned int> > > >, P = boost::topo_sort_visitor<std::back_insert_iterator<std::vector<long unsigned int, std::allocator<long unsigned int> > > >, T = boost::graph_visitor_t, R = boost::bgl_named_params<boost::identity_property_map, boost::vertex_index_t, boost::no_property>]â: /usr/include/boost/graph/topological_sort.hpp:64: instantiated from âvoid boost::topological_sort(VertexListGraph&, OutputIterator, const boost::bgl_named_params<P, T, R>&) [with VertexListGraph = std::vector<std::vector<long unsigned int, std::allocator<long unsigned int> >, std::allocator<std::vector<long unsigned int, std::allocator<long unsigned int> > > >, OutputIterator = std::back_insert_iterator<std::vector<long unsigned int, std::allocator<long unsigned int> > >, P = boost::identity_property_map, T = boost::vertex_index_t, R = boost::no_property]â /usr/include/boost/graph/transitive_closure.hpp:120: instantiated from âvoid boost::transitive_closure(const Graph&, GraphTC&, G_to_TC_VertexMap, VertexIndexMap) [with Graph = boost::adjacency_list<boost::setS, boost::vecS, boost::bidirectionalS, boost::property<boost::vertex_name_t, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::no_property>, boost::property<boost::edge_weight_t, int, boost::no_property>, boost::no_property, boost::listS>, GraphTC = boost::adjacency_list<boost::setS, boost::vecS, boost::bidirectionalS, boost::property<boost::vertex_name_t, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::no_property>, boost::property<boost::edge_weight_t, int, boost::no_property>, boost::no_property, boost::listS>, G_to_TC_VertexMap = boost::iterator_property_map<long unsigned int*, boost::vec_adj_list_vertex_id_map<boost::property<boost::vertex_name_t, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::no_property>, long unsigned int>, long unsigned int, long unsigned int&>, VertexIndexMap = boost::vec_adj_list_vertex_id_map<boost::property<boost::vertex_name_t, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::no_property>, long unsigned int>]â /usr/include/boost/graph/transitive_closure.hpp:263: instantiated from âvoid boost::transitive_closure(const Graph&, GraphTC&) [with Graph = Graph, GraphTC = Graph]â sample_main.cpp:121: instantiated from here /usr/include/boost/graph/depth_first_search.hpp:324: error: no matching function for call to âvertices(const std::vector<std::vector<long unsigned int, std::allocator<long unsigned int> >, std::allocator<std::vector<long unsigned int, std::allocator<long unsigned int> > > >&)â //Pseudo Code on which it is failing /... Graph TC; transitive_closure(Original_graph, TC); ...// Kindly help..... Thanks Abhishek Vyas Tata Consultancy Services Mailto: abhishek.v(a)tcs.com Website: http://www.tcs.com ____________________________________________ Experience certainty. IT Services Business Solutions Outsourcing ____________________________________________ =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you

2 3

Need help with boost parameter library, multiple deduced defaults.
by StephQ 20 Nov '07

20 Nov '07

I am currently working on a mathematical library for the simulation of stochastic processes. I am a researcher in Statistics, hence my limited skills in c++ programming :) Let me introduce the framework briefly. The part of the library I am interested with is very similar to the boost random library. I need to implement it because I need to extend some functionality and I am not confident in modifying the boost random library to extend its behaviour (too complicated for me :P). We have (lazy syntax): PseudoRng<TImpl> //A particular pseduo random number generator QuasiRng<TImpl> // A particualr quasi random number generator GaussianDistribution // A particular statistical distribution Sampler<GaussianDistribution> // The interface (for other components of the library) of a sampler of random numbers distributed as a GaussianDistribution Then I consider: template < class TGenerator, class TDistribution, typename TDistribution::variate_t (TDistribution::*algorithm)( const TGenerator& ) const = &TDistribution::sample_default > class VariateSampler : public Sampler<TDistribution> { ... } Here TGenerator can be PseudoRng<TImpl> or QuasiRng<TImpl>, TDistribution can be GaussianDistribution and the pointer to member function algorithm select the algorithm used to sample. While constructing VariateSampler I would like to: 1) Automatically deduce the type of TGenerator and TDistribution 2) Automatically select a different default for algorithm, for particular TDistribution (like GaussianDistribution,PoissonDistribution....) depending on the fact that TGenerator is of type PseudoRng<TImpl> or QuasiRng<Timpl>. So for every TDistribution two different defaults for algorithm. I think that boost parameter should solve my problem, but I am quite confused about how to implement it, expecially the second point. Could you help me with the basic steps I need to consider? Thank you very much in advance. Regards StephQ

2 2

[graph] inheriting from adjacency_list
by Krishna Roskin 20 Nov '07

20 Nov '07

Hey all, I've been having some problems inheriting from adjacency_list. My code is real simple: ---------- 8>< ---------- #include<iostream> #include<string> #include<boost/graph/adjacency_list.hpp> using namespace boost; class Weighted : public adjacency_list<vecS, vecS, bidirectionalS, property<vertex_distance_t, double>, no_property, no_property> { }; int main(int argc, char* argv[]) { Weighted m; property_map<Weighted, vertex_distance_t>::type pmap = get(vertex_distance, m); return 0; } ---------- 8>< ---------- The error is: main.cpp: In function ‘int main(int, char**)’: main.cpp:16: error: conversion from ‘boost ::vec_adj_list_vertex_property_map<boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, boost::property<boost::vertex_distance_t, double, boost::no_property>, boost::no_property, boost::no_property, boost::listS>, boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS, boost::property<boost::vertex_distance_t, double, boost::no_property>, boost::no_property, boost::no_property, boost::listS>*, double, double&, boost::vertex_distance_t>’ to non-scalar type ‘boost::vec_adj_list_vertex_property_map<Weighted, Weighted*, double, double&, boost::vertex_distance_t>’ requested make: *** [main.o] Error 1 Is there some reason that this won't work? Is it a bug? If I try to get property_maps for edge properties, I don't have problems. Any help greatly appreciated, -krish -- Krishna Roskin Center for Biomolecular Science and Engineering, UC Santa Cruz mailto:krish@soe.ucsc.edu http://www.soe.ucsc.edu/~krish/

1 0

enable_if on operators
by Robert Dailey 19 Nov '07

19 Nov '07

Hi, Right now I'm trying to overload the [] twice, however after compilation is done only one of the overloads will actually exist at runtime: template< unsigned int t_number > struct foo { t_type data[10]; t_type& operator[] ( unsigned int index ) { return data[index]; } }; In the structure above, I have only shown 1 array index operator just as an example. I want to define two overloads with the following conditions: 1) If t_number is equal to 1, enable_if will allow the first overload for the array operator. 2) If t_number is greater than 1, enable_if will allow the second overload for the array operator. Is there some sort of is_less_than or is_equal objects in boost I can use with enable_if for my operator overloads? Thanks.

2 1

base class should be explicitly initialized in the copy constructor
by Rock Star 19 Nov '07

19 Nov '07

Hello, I have a question regarding the warning that I get when I compile a program using boost::ublas library. I have to say that I'm not really experienced programmer so I might be doing something really stupid... Anyway, I'm using WinXP with Mingw 3.4.5 and boost 1.34-1. I want to create a simple function that returns a vector. I have it written like this: ################################################################ > ====== file.h ====== < #include <boost/numeric/ublas/vector.hpp> typedef boost::numeric::ublas::vector<double> vec; vec testfunc (vec &v); > ====== file.cpp ====== < #include "file.h" vec testfunc (vec &v) { vec v1 = v/2; return v1; } #################################################################### When I try to compile, I get the following warning: base class `class boost::numeric::ublas::storage_array<boost::numeric::ublas::unbounded_array<double, std::allocator<double> > >' should be explicitly initialized in the copy constructor How can I get rid of this warning? Thank you very much for your answers.

1 0

Serialization - 'size_t' to 'std::streamsize' error
by Dave Nay 19 Nov '07

19 Nov '07

Ok....this is really confusing. I successfully created a small test project several months ago using the Boost Serialization library to serialize some binary data. I am now attempting to add binary serialization to a production project, and I receive a bunch of compiler warnings. I can still compile and execute the test application with no warnings or errors. I am using VS2005 with boost 1.34.1 I have included the first few compiler warnings below... 1>C:\Program Files\boost\boost_1_34_1\boost/archive/basic_binary_oprimitive.hpp(136) : warning C4267: 'argument' : conversion from 'size_t' to 'std::streamsize', possible loss of data 1> C:\Program Files\boost\boost_1_34_1\boost/archive/basic_binary_oprimitive.hpp(120) : while compiling class template member function 'void boost::archive::basic_binary_oprimitive<Archive,Elem,Tr>::save_binary(const void *,size_t)' 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> Elem=char, 1> Tr=std::char_traits<char> 1> ] 1> C:\Program Files\boost\boost_1_34_1\boost/archive/detail/oserializer.hpp(91) : see reference to function template instantiation 'void boost::archive::basic_binary_oprimitive<Archive,Elem,Tr>::save<T>(const T &)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> Elem=char, 1> Tr=std::char_traits<char>, 1> T=unsigned char 1> ] 1> C:\Program Files\boost\boost_1_34_1\boost/archive/detail/oserializer.hpp(244) : see reference to function template instantiation 'void boost::archive::save_access::save_primitive<Archive,T>(Archive &,const T &)' being compiled 1> with 1> [ 1> Archive=boost::archive::binary_oarchive, 1> T=unsigned char 1> ] Thanks, Dave -- Dave Nay CIVision, LLC

2 2

Setup for MinGW/EasyEclipse
by Chris Miller 19 Nov '07

19 Nov '07

I know this is rather menial to be asking for assistance on, but I'm stuck and don't want to proceed and make a mistake. I'm rather sick of messing up with simple library setup things, and want to get down and dirty with some code soon! So if you could be so kind as to help me understand what to do I'd really appreciate it. I've got to make Boost work on Microsoft Windows XP SP2, using the MinGW libraries that came with EasyEclipse C/C++. However, the getting started documentation on Boost.org only discusses how to make Boost work for MSVC, which doesn't help me all too much. If some kind person could help this tired programmer, I'd really appreciate it! I used Google, but I didn't find anything terribly definitive. If only Windows could be more like Linux, and all I'd have to do is something cool like wgm install boost-dev... but then it wouldn't be Windows, would it? Anyways, thanks in advance for any help anyone can render me!

4 4

Boost - Build Directory Problem Bis
by chandra_india＠webdunia.com 19 Nov '07

19 Nov '07

1 0

[BGL] different graphs that share vertices
by yguel 19 Nov '07

19 Nov '07

Hello, in order to make a hierarchy: I have a set of vertices that are separated in disjoint sets of increasing size (2^s), called scales: scale 0,1,2... The vertices at scale s are used also at scale s+1and a graph is build at each scale using all the vertices of smaller scales. Therefore I would like to build an adjacency list like structure that can store multiple neighbor lists per vertex: one per scale the vertex belongs to. Has someone had had experience to share with such a problem using the BGL ? - Thanks. Manuel

1 0

[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

[boostbook] Building Boost documentation
by Edward Diener 17 Nov '07

17 Nov '07

Because I wanted to read documentation on some of the new libraries in the latest Boost SVN repository, which existed only in XML format, it was time to go through the annual rite of attempting to use Doug Gregor's excellent documention of "The Boostbook Documentation Format" in order to setup the documentation system to generate documentation using bjam. Although Mr. Gregor's documentation is extremely good, I have never been completely successful in the past, but I had my fingers crossed in hopeful expectation this time. I am doing this on Windows so I have to set things up manually. 1) I downloaded xsltproc and doxygen successfully, and "installed" them into appropriate directories and, to make things easy for myself, put those directories in my PATH. 2) After making sure I had no .jam file of any kind in my home directory I went to the \tools\build\v2\user-config,jam in the directory in which the latest Boost Subversion resides, and added the line: using xsltproc ; 3) I downloaded the latest XSL stylesheets and Docbook DTD and put them in their own separate directies, "E:\Utilities\docbook-xsl-1.73.2" and "E:\Utilities\docbook-dtd-4.2". 4) I added to my user-config.jam the lines: # BoostBook configuration using boostbook : E:/Utilities/docbook-xsl-1.73.2 : E:/Utilities/docbook-dtd-4.2 ; 5) Now further following instructions to test out my installation so far I went to the \libs\function\doc after copying boostbook.css from the \doc\html directory, and tried the bjam command. My result is: warning: Graph library does not contain optional GraphML reader. note: to enable GraphML support, set EXPAT_INCLUDE and EXPAT_LIBPATH to the note: directories containing the Expat headers and libraries, respectively. warning: skipping optional Message Passing Interface (MPI) library. note: to enable MPI support, add "using mpi ;" to user-config.jam. note: to suppress this message, pass "--without-mpi" to bjam. note: otherwise, you can safely ignore this message. Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (don't panic: this is a strictly optional feature). E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/tools\boostbook.jam:300: in object(boostbook-generator)(a)326.run warning: rulename $(base-target).depends expands to empty string E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\generators.jam:840 : in try-one-generator-really E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\generators.jam:902 : in try-one-generator E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\generators.jam:111 0: in construct-really E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\generators.jam:118 6: in generators.construct E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\targets.jam:1398: in construct E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\targets.jam:1242: in object(typed-target)(a)327.generate E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\targets.jam:765: i n generate-really E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\targets.jam:738: i n object(main-target)(a)331.generate E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\targets.jam:255: i n object(project-target)(a)325.generate E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2\build-system.jam:402: in load E:\Utilities\BoostLibraries\boost_1_34_0\tools\build\v2/kernel\modules.jam:261: in import E:\Utilities\BoostLibraries\boost_1_34_0\tools\build\v2/kernel/bootstrap.jam:132 : in boost-build E:\Programming\Version Control\Subversion\Boost\boost-build.jam:9: in module sco pe E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/tools\boostbook.jam:307: in object(boostbook-generator)(a)326.run warning: rulename $(target[2]).set-path expands to empty string E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\generators.jam:840 : in try-one-generator-really E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\generators.jam:902 : in try-one-generator E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\generators.jam:111 0: in construct-really E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\generators.jam:118 6: in generators.construct E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\targets.jam:1398: in construct E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\targets.jam:1242: in object(typed-target)(a)327.generate E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\targets.jam:765: i n generate-really E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\targets.jam:738: i n object(main-target)(a)331.generate E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\targets.jam:255: i n object(project-target)(a)325.generate E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2\build-system.jam:402: in load E:\Utilities\BoostLibraries\boost_1_34_0\tools\build\v2/kernel\modules.jam:261: in import E:\Utilities\BoostLibraries\boost_1_34_0\tools\build\v2/kernel/bootstrap.jam:132 : in boost-build E:\Programming\Version Control\Subversion\Boost\boost-build.jam:9: in module sco pe E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/tools\boostbook.jam:308: in object(boostbook-generator)(a)326.run warning: rulename $(target[2]).depends expands to empty string E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\generators.jam:840 : in try-one-generator-really E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\generators.jam:902 : in try-one-generator E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\generators.jam:111 0: in construct-really E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\generators.jam:118 6: in generators.construct E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\targets.jam:1398: in construct E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\targets.jam:1242: in object(typed-target)(a)327.generate E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\targets.jam:765: i n generate-really E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\targets.jam:738: i n object(main-target)(a)331.generate E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2/build\targets.jam:255: i n object(project-target)(a)325.generate E:/Utilities/BoostLibraries/boost_1_34_0/tools/build/v2\build-system.jam:402: in load E:\Utilities\BoostLibraries\boost_1_34_0\tools\build\v2/kernel\modules.jam:261: in import E:\Utilities\BoostLibraries\boost_1_34_0\tools\build\v2/kernel/bootstrap.jam:132 : in boost-build E:\Programming\Version Control\Subversion\Boost\boost-build.jam:9: in module sco pe warn: Unable to construct ./function-doc ...found 1 target... 6) I have no doubt done something wrong, but I have no idea what. Anybody have any clues ?

1 0