- Boost-users - lists.boost.org

Boost Serialization with Template classes
by A L 18 Nov '08

18 Nov '08

Hi I'd like to ask how can I get my template classes to work with boost class versioning? Since BOOST_CLASS_VERSION does not work for template classes. thanks Al

1 0

[BGL] Edmund Karps works with long, but does not with doubles
by Matthias Teich 17 Nov '08

17 Nov '08

Hello, I have some problems with the max-flow algorithms in the boost graph library. The only algorithm that worked for me was edmund karps, but only when I use long or int values as edge capacities. Here is my graph: typedef adjacency_list<listS, vecS, bidirectionalS, Node, Edge> Graph; typedef graph_traits<Graph> Traits; typedef Traits::vertex_iterator vertex_iter; typedef graph_traits<Graph>::edge_iterator edge_iter; typedef property_map<Graph, default_color_type Node::*>::type ColorMap; typedef property_map<Graph, int Edge::*>::type CapacityMap; typedef property_map<Graph, Graph::edge_descriptor Edge::*>::type ReverseEdgeMap; typedef property_map<Graph, Graph::edge_descriptor Node::*>::type PredecessorMap; typedef property_map<Graph, CapacityMap::value_type Node::*>::type DistanceMap; typedef property_map<Graph, long Node::*>::type IndexMap; struct Edge { CapacityMap::value_type capacity; CapacityMap::value_type residual_capacity; Graph::edge_descriptor reverse; }; struct Node { Mesh::FaceHandle faceHandle; CapacityMap::value_type distance; long index; Traits::edge_descriptor predecessor; boost::default_color_type color; }; Before calling edmund karps I add an edge with zero capacity to each existing edge and set the reverse edges. It would be very nice if anyone could give me a hint why this does not work. The push relabel and the kolmogorov algorithm always return 0 as result :( Best Regards, Matthias -- View this message in context: http://www.nabble.com/-BGL--Edmund-Karps-works-with-long%2C-but-does-not-wi… Sent from the Boost - Users mailing list archive at Nabble.com.

2 1

MSVC++ linker asking for boost_regex even though not using it
by Sharad Mittal 17 Nov '08

17 Nov '08

I have been compiling my program with boost_thread, boost_date_time and boost_system on mingw till now. Now I am trying to compile the same program on VC++ (9.0) and it is asking for libboost_regex-vc90-mt-sgd-1_36.lib . Is that normal? I have not used boost::regex in my code at all. Thanks, Sharad

2 1

tokenizer and R package
by Vidhu Choudhary 17 Nov '08

17 Nov '08

Hi Thank you all . With your help now I could install boost on windows I making a R package which contains c src code which uses tokenizer.hpp I made the package and tried to install it in Linux. I could install the package by successfully making the .so file When I tried the same in windows it showed error : bed2vector.C:13:31: boost/tokenizer.hpp: No such file or directory. While making the .dll R is using gcc to compile the files. Some how the boost libraries were not linked to gcc. And I dont know how to do it in windows from command line. If anyone could suggest it will be a great help --Vidhu

1 0

[Proto] Detecting if a tag is a proto type or not
by Joel Falcou 17 Nov '08

17 Nov '08

I want to do some dispatching based on the fatc that my binary_expr tag is one of predefined proto tag or not. What kind of internal properties of proto tags can I try to use to perform this discrimination ? Thanks in advance

2 3

Some problems about GIL
by blp330 17 Nov '08

17 Nov '08

Hi, 1. Does any one know how to crop a image using GIL? 2. The IO extension seems not support to serialize a image binary data to memory, how to do that using GIL? (read png -> do some stuffs... -> write png to char* buffer not file.) 3. Is there any one good performance image comparison algorithm to compare two images by GIL? I am using ImageMagick to do that now. It try to compute Mean Absolute Error for two images, how this can be done by GIL? Thanks for your answer, I am try to adopt my old ImageMagick's code to GIL, I like elegant design of GIL but I am a newbie. Thanks for you patient to answer my questions. :) -- View this message in context: http://www.nabble.com/Some-problems-about-GIL-tp20526156p20526156.html Sent from the Boost - Users mailing list archive at Nabble.com.

2 3

--layout=system in user-config.jam?
by Raymond Wan 17 Nov '08

17 Nov '08

Hi all, In a recent post (a few weeks ago), someone asked if it is possible to remove the compiler name/version from the library name. i.e., libboost_math_c99-gcc43-mt-1_37.so --> libboost_math_c99-mt.so Someone replied that adding "--layout=system" to bjam would do the trick and indeed, that worked. When compiling Boost, I was wondering if it is possible to add this parameter to the user-config.jam file, rather than editting the Makefile directly? If so, what would be the syntax to do this? Somewhere, I read that user-config.jam "define[s] available toolsets" -- I guess this parameter is not a toolset, so it is not possible? The reason I am asking is rather silly -- but just that editting the Makefile is slightly more error-prone than sending a user-config.jam to someone (or backing it up myself for later use) since the Makefile could change based on what configure outputs. Thank you! Ray

2 2

[Proto] Strange behavior with semantic action and custom tag function
by Joel Falcou 16 Nov '08

16 Nov '08

I'm stuck on some problem that may en dup silly. I have a DSL defined by the following grammar : struct dimen_grammar : bp::or_< ////////////////////////////////////////////////////////////////////////// // Terminals are dimensional values or integral values ////////////////////////////////////////////////////////////////////////// bp::or_< bp::terminal< dimensions<bp::_,bp::_> > , integer_grammar > ////////////////////////////////////////////////////////////////////////// // dimen can be added together or scaled by an integer // or shifted left or right by an integer ////////////////////////////////////////////////////////////////////////// ,bp::or_< bp::plus<dimen_grammar,dimen_grammar> ,bp::multiplies<dimen_grammar,integer_grammar> ,bp::multiplies<integer_grammar,dimen_grammar> ,bp::shift_left<dimen_grammar,integer_grammar> ,bp::shift_right<dimen_grammar,integer_grammar> > > {}; I've defined a proper callable_context that take care of my special terminals and built a terminal class. At this point, everythign works perfect : i can build expressions and evaluate them. Now I add a grammar with semantic action that helps me computes an aspect of those expression : struct dimen_size : bp::or_< ////////////////////////////////////////////////////////////////////////// // dimensionnal values terminal contains its own size value ////////////////////////////////////////////////////////////////////////// bp::when< bp::terminal< dimensions<bp::_,bp::_> > , dimension_of< bp::_value>() > ////////////////////////////////////////////////////////////////////////// // integral values has a size of 1 ////////////////////////////////////////////////////////////////////////// , bp::when<integer_grammar, bm::size_t<1>()> ////////////////////////////////////////////////////////////////////////// // size(d1+d2) = max(size(d1),size(d2)) ////////////////////////////////////////////////////////////////////////// , bp::when< bp::plus<dimen_grammar,dimen_grammar> , bm::max<dimen_size(bp::_left),dimen_size(bp::_right)>() > ////////////////////////////////////////////////////////////////////////// // size(d1*i) = size(d1) ////////////////////////////////////////////////////////////////////////// , bp::when< bp::multiplies<dimen_grammar,integer_grammar> , dimen_size(bp::_left) > ////////////////////////////////////////////////////////////////////////// // size(i*d2) = size(d2) ////////////////////////////////////////////////////////////////////////// , bp::when< bp::multiplies<integer_grammar,dimen_grammar> , dimen_size(bp::_right) > ////////////////////////////////////////////////////////////////////////// // size(d1<<i) = size(d1) ////////////////////////////////////////////////////////////////////////// , bp::when< bp::shift_left<dimen_grammar,integer_grammar> , dimen_size(bp::_left) > ////////////////////////////////////////////////////////////////////////// // size(d1>>i) = size(d1) ////////////////////////////////////////////////////////////////////////// , bp::when< bp::shift_right<dimen_grammar,integer_grammar> , dimen_size(bp::_left) > ////////////////////////////////////////////////////////////////////////// // Other returns 0 ////////////////////////////////////////////////////////////////////////// , bp::when<bp::_, bm::size_t<0>()> > {}; This works. If I remove the bp::when<bp::_, bm::size_t<0>()>, it fails to compile when I try to use a hand-overloaded operator<< for displaying expression values on standard output. So, is there anything I missed (like deactivating operator<< in the grammar somehow ?) ? Other question : When defining custom tag to build new function, why does the make_expr tempalte doesn't do check on its argument to see if it's match the grammar of the domain it's bound to use ? Seems I'm forced to add additional layer of SFINAE to prevent those function to get called on w/e types. Thanks in advance for help -- ___________________________________________ Joel Falcou - Assistant Professor PARALL Team - LRI - Universite Paris Sud XI Tel : (+33)1 69 15 66 35

2 6

[asio] Header ordering problems
by Robert Ramey 16 Nov '08

16 Nov '08

#include <boost/date_time/posix_time/posix_time.hpp> #include <boost/asio.hpp> produces the error message at compile time: 1>c:\boost_1_37_0\boost\asio\detail\socket_types.hpp(27) : fatal error C1189: #error : WinSock.h has already been included while #include <boost/asio.hpp> #include <boost/date_time/posix_time/posix_time.hpp> does not. Same problem occurs when including any of the headers in boost/thread/... Robert Ramey

2 1

About boost::asio
by Ken zhang 16 Nov '08

16 Nov '08

Hi Dear all I want to handle socket close event in my connection, but I can't found mothed in ip::tcp::socket,How can I handle close event for socket? Thanks -- Best Regards, Yours Kennir

2 3