October 2005 - Boost-users - lists.preview.boost.org

question about subgraphs
by Jeffrey Holle 19 Oct '05

19 Oct '05

I am using boost 1.33.0. I want to use a subgraph to represent a spanning tree of a graph. This application requires adding and deleteing edges to just the tree and not the underlining graph though. Note that this wouldn't violate the requirements of a subgraph, a spanning tree contains all the vertices, and a subset of the edges of the underlining graph. Is it possible to do this, maybe through inheritance?

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[MultiIndex] Key extraction from a base member
by Bruno Martínez 19 Oct '05

19 Oct '05

Hi. I have the following problem with MultiIndex. For struct Base { int id; }; struct Der : Base { }; I can't make a key extractor. This way typedef multi_index_container< Der, indexed_by< ordered_unique<member<Der, int, &Der::id> > >Set; doesn't work because &Der::id is of type pointer to member of Base. This other typedef multi_index_container< Der, indexed_by< ordered_unique<member<Base, int, &Base::id> > >Set; doesn't work because of the ChainedPtr overloads in member. I tried casting &Der::id to the appropiate type, but couldn't make it work. Maybe the solution is to put some enable_ifs in member. Regards, Bruno

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boost::any & Serialization
by Piyush Kapadia 19 Oct '05

19 Oct '05

Why can't we use boost::any for serialization ? Isn't there any work around to make this work ???

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[Serialization]class(type) name in xml archive?
by Sean Huang 19 Oct '05

19 Oct '05

Is it possible to add class(type) name in xml archive? It would be a big help when looking at the xml output (yes, we want to display those files). for example (from demo.xml): <s type="bus_schedule" class_id="0" tracking_level="0" version="2"> ^^^^^^^^^^^^^^^^^ Thanks, Sean

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Boost Birds of Feather @ OOPSLA 05?
by Jeff Garland 18 Oct '05

18 Oct '05

All - I'm going to be in San Diego @ OOPSLA next week and I'm wondering if any Boost users and developers would be interested in getting together for a BOF one evening. Obvious topic of discussion is all things Boost/C++/TR2. Right now I'm thinking Tuesday night would be a good time. Let me know if there is interest and I'll set this up. Jeff Note, I cross-posted to the user and developer list b/c the idea is this would be open to everyone with an interest in Boost.

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FW: custom iterator_adaptor::pointer
by Sigg Christian 18 Oct '05

18 Oct '05

Dear boosters, I'm trying to figure out why there is no way to define the iterator_adaptor's pointer type. I'm trying to write an iterator that concurrently accesses two containers, but the interface should look like it's only one container. Therefore, it is necessary to write my own value, reference and pointer type. However, the iterator_adaptors pointer type is always value*. Is it save to just overload the pointer typedef and reimplement operator->()? I'm not too much of a c++ expert, so if anyone could comment on that, I would greatly appreciate it. Christian

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Any way to use boost lib standalone?
by Hendrik Bock 18 Oct '05

18 Oct '05

Hello there! I have searched the boost-users mailing-list for quite some time, but found no answer to my question: Is there a possibility to separate a library from the rest of boost? I only want to use the regexp library of boost and i have to include all related header-files plus libs into our company-cvs. Till now i wasn't able to find out, which *.hpp files are needed by boost and which ones aren't. Kind regards, Hendrik Bock

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Boost Graph Library: Python Bindings
by Yu Huang 17 Oct '05

17 Oct '05

Hi guys, I report a small bug related to bgl.file_kind.adjlist. I tried it using an inputfile in the specified format, but got nothing. And i checked the source code, basic_graph.cpp and found on line 129: case gfk_adjlist: break; which means simply not dealing with it at all. I guess those two guys are so busy to fill some codes in it. Thanks, Yu

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Building with Dinkumware Unabridged Library?
by Drumheller, Michael 17 Oct '05

17 Oct '05

There does not seem to be a build option for using Boost with the Dinkumware Unabridged Library. Yet I know there are Boost users who use Dinkumware. Can someone explain? Thanks,

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[unit test framework] Command-line arguments; documentation
by Paul Giaccone 17 Oct '05

17 Oct '05

How do you access command-line arguments in test cases? According to http://boost.org/libs/test/doc/components/utf/index.html: "This function [boost::unit_test::test_suite* init_unit_test_suite ( int argc, char* argv[] )] should create and initialize top level instance of the class test_suite. The NULL pointer returned by the function is treated as a non-initialized test_suite - testing aborted and boost::exit_test_failure is returned. In other case the framework runs created instance of the class test_suite. The framework forwards command line argument specified during test invocation. It's guarantied that any framework-specific command line arguments are excluded." I understood this to mean that the command-line arguments are passed to the test cases ("The framework forwards command line argument specified during test invocation."), but this doesn't seem to be the case. So how do you pass and access command-line arguments in the test cases? I tried passing them explicitly: void digitise_graph_test(int argc, char* argv[]) { [...] } boost::unit_test::test_suite* init_unit_test_suite(int argc, char* argv[]) { test -> add(BOOST_TEST_CASE(&my_test(argc, argv))); } but this gives a compilation error: error C2102: '&' requires l-value A secondary question, or rather, a polite request: Could I ask that someone edit the documentation for unit test framework, please? While is it mainly intelligible, some of it is difficult to make sense of. Apologies to Gennadiy Rozental: this isn't meant as a personal criticism nor to sound patronising, but when a developer's first language is not the language in which the documentation is to be published, it is preferable to have a speaker of that language write the documentation or at least edit it.. I can cope with the grammatical or spelling errors and am not criticising those, but the meaning is somewhat difficult to derive in some places. Documentation must be understandable to be useful, and to my mind, it is not at the moment. Thanks. Paul Giaccone

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