March 2008 - Boost - lists.preview.boost.org

[graph] csr_graph_test failure on VC9
by Richard Webb 17 Mar '08

17 Mar '08

The csr_graph_test test is failing on VC9 (http://tinyurl.com/3bbvvo) with the same error message as occurs on VC8 (http://tinyurl.com/3byxt3) which is marked as an expected failure. Should VC9 be marked as an expected failure as well? I guess that the existing markup should be extended to the 64bit VC8 as well (e.g. http://tinyurl.com/3dr3wy) Thanks, Richard Webb

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[thread][1.35.0][trunk] New thread documentation
by Anthony Williams 17 Mar '08

17 Mar '08

Hi, I've just checked in some new quickbook-based documentation for the much-revised thread library on trunk. I expect there's still some parts that are inadequate, but given the major changes since Boost 1.34, I want to ensure that the new docs are in with the new release. So, first question: is it OK to commit the new documentation to the release branch? Second question: I see that many libraries have the generated documentation checked in to SVN. Is this recommended practice? Next: The thread library documentation index at BOOST_ROOT/libs/thread/doc/index.html redirects to BOOST_ROOT/doc/html/thread.html, which in turn redirects to the generated version on the website. Is this still appropriate? Finally: Are there any glaring omissions that I ought to address before 1.35.0 is shipped? Thanks, Anthony -- Anthony Williams Just Software Solutions Ltd - http://www.justsoftwaresolutions.co.uk Registered in England, Company Number 5478976. Registered Office: 15 Carrallack Mews, St Just, Cornwall, TR19 7UL

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[xpressive] regex_replace() issue.
by Robert Dailey 17 Mar '08

17 Mar '08

Hi, Currently I'm using Boost.Xpressive to search a string for variables that will be replaced by localized utf-8 encoded strings, in the format of $(variable_name). Because of this, I don't think I can simply use regex_replace(), since it takes a common regex that will be used to replace all matches, when in my case each match requires a special, unique replacement. Is there a way of doing this using Boost.Xpressive, or do I need to use a different component in the boost library? Is there a Xpressive 'replace' function that takes a functor, perhaps, and for each match it calls the function object and replaces the match with the return value of the functor? An example of a string that I'll be searching is below: "This string $(variable1) has localized $(var2) text interleaved for no $(reason)" In the string above, we have 3 variables. Each variable will reference a string in a localization table, which will then be used to replace the variable itself. Any help is greatly appreciated. Thanks.

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[filesystem] not_found_error unresolved external symbol on windows platform
by Alexander Arhipenko 17 Mar '08

17 Mar '08

Hi, guys! I had following problem when using boost::filesystem dynamically linked on windows platform: unresolved external symbol boost::filesystem::not_found_error. (By the way, this issue was raised up on users list some time ago, but had no resolution). According to dumpbin utility, mentioned symbol resides in boost_filesystem binary, so, I guess, there is some problem with macro magics (__declspec(dllimport/dllexport) ) in header file (operations.hpp). I'm building test application using Boost.Build: Boost.Build V2 (Milestone 11) Boost.Jam 03.1.16 and boost 1.34.1. Compiler is MSVC 9, but problem is reproducible on MSVC 8. The attached patch fixes the problem by defining BOOST_FILESYSTEM_DYN_LINK in usage requirements (in boost.filesystem's Jamfile.v2), but I'm wondering 1. why all the other symbols are successfully imported when mentioned macro is not defined 2. and why this macro wasn't defined in usage requirements by the author of the library. Could you please shed a light on this issue or correct me if I'm doing something wrong. Thanks. Sasha P.S. In attach there are minimal project that reproduces the problem and patch that fixes the problem.

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[quickbook][1.35]
by Daniel James 16 Mar '08

16 Mar '08

Hi, There are two copies of the quickbook documentation in the release candidate - one in 'boost/tools/quickbook/doc/html' and one in the main generated documentation. The one in the generated documentation has a few broken links because they're releative to the 'tools' location. So can I remove it from the generated documentation from this release, and then if it needs to be added to the generated documentation, we can get that working for the next release? Daniel

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Features list for v1.34
by Balasubramanyam, Shivakumar 16 Mar '08

16 Mar '08

Hi, Could someone point me to a link that provides features added or major bugs fixed for a major boost release. Currently we are using 1.32 and I would like to know if we need to upgrade to 1.34 releases. I tried in the boost.org but could not find a link. Thanks, Shiva

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Attention: all authors of new libraries for 1.35.
by John Maddock 16 Mar '08

16 Mar '08

Could you please check that the descriptions here: http://beta.boost.org/users/news/version_1_35_0 are correct. If you would like to expand on the descriptions given then now is the time to do so! Thanks, John.

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Review Request: Dataflow.Signals
by Stjepan Rajko 16 Mar '08

16 Mar '08

Hello, I would like to request a formal review of the Dataflow.Signals layer of the Dataflow library. The Dataflow.Signals layer provides dataflow functionality based on function calls (using Boost.Signals), and is a result of the Signal Networks GSoC project from 2007. (The other layers of the Dataflow library are not quite ready, so for now I'd like to keep them as implementation details and/or examples of the Dataflow.Signals layer, and submit them for review at a later point.) The documentation for the Dataflow library is located at: http://dancinghacker.com/code/dataflow/ Version 0.9.0 has been uploaded to the vault, in the Dataflow directory. There are a few more things I plan to add before the library comes up for review, especially regarding the documentation and motivating examples. Description: The Dataflow library is a generic library for dataflow programming. Dataflow programs can typically be expressed as a graph in which vertices represent components that process data, and edges represent the flow of data between the components. As such, dataflow programs can be easily reconfigured by changing the components and/or the connections. The Dataflow.Signals layer provides dataflow functionality based on function calls - which is one of the fundamental ways of dataflow in C++. For its data transport mechanism, Dataflow.Signals uses Boost.Signals which can be used to make lasting dataflow connections based on function calls. Dataflow.Signals provides the following to facilitate signals-based dataflow networks: * A number of useful general-purpose components, and building blocks for implementing new components. * Various free functions and operators for connecting and using components. Kind regards, Stjepan

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[fusion] Instantiating elements of nested sequences
by Carlos Rafael Giani 16 Mar '08

16 Mar '08

Hi, I want to store boost signals in fusion sequences. This does not work directly, since signals are noncopyable. I figured I could use shared_ptr's of the signals, and all that needs to be done is to iterate through the sequences, instantiate objects, and assign them to the shared_ptr's. These are the structures for the signals: template < typename Element > struct element_signals { typedef boost::signal < void(model const &, Element const &) > event_signal_t; typedef boost::signal < void(model const &, Element const &, std::vector < std::string > const &) > modified_signal_t; typedef boost::fusion::vector < std::tr1::shared_ptr < event_signal_t >, // add std::tr1::shared_ptr < event_signal_t >, // remove std::tr1::shared_ptr < modified_signal_t > // modified > signals_t; typedef boost::fusion::pair < Element, signals_t > signals_pair_t; }; typedef boost::fusion::map < element_signals < vertex_iterator > ::signals_pair_t, element_signals < edge_iterator > ::signals_pair_t > signals_t; Now, I am trying to do something like this pseudo-code: signals_t signals; for_each(signals, for_each(_1, _1 = typeof(_1)(new typeof(_1)::element_type) ) ); Problems: 1) How do I get the type of the current element in the for_each loop without resorting to functors? 2) I tried to use a MPL placeholder for the _1 in the outer for_each loop, but it didn't seem to work. Does Fusion have its own placeholders, or what am I missing? Regards,

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[1.35][GIL] No copyright/license on docs?
by John Maddock 16 Mar '08

16 Mar '08

Currently the biggest single group of failures in the inspection report comes from GIL: http://mysite.verizon.net/beman/inspect.html#gil Is there any easy way we can regenerate this documentation with an appropriate license declaration? John.

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