July 2011 - Boost - lists.preview.boost.org

[Bug] [interprocess] Data loss in boost::interprocess::detail::truncate_file
by Dmytro Ovdiienko 11 Jul '11

11 Jul '11

Hi, boost::interprocess::detail::*truncate_file* accepts *size_t* instead of * offset_t*. On x32 platform it causes data loss in the: - file_wrapper::truncate - shared_memory_object::truncate Regards. Dima -- Dmytro Ovdiienko e-mail: dmitriy.ovdienko(a)gmail.com skype: dmitriy.ovdienko(a)gmail.com mobile: +38050-1909731

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ESA Summer of Code in Space
by Thomas Heller 11 Jul '11

11 Jul '11

Hi List, I just read about the ESA Summer of Code in Space (SOCIS) program. Looks similar interesting that GSOC. I just wanted to probe interest in that program. I would volunteer on taking further actions, the mentoring organizations application deadline is on 07/15 so its on rather short notice. Andrew, you took care of the GSOC application, right? Best regards, Thomas

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[program_options] small proposed change
by jcwilson.boost＠nym.hush.com 11 Jul '11

11 Jul '11

I found a way to avoid having to explicitly provide the type of the variable value that I was trying to extract from the variable_map. In environments that support the C++0x standard, you can use the std::map.at() function to get generic access to the variable's value(Trying to use operator[]() usually results in a compiler error.): // Given the function Foo as: void Foo(unsigned short val); // The following are equivalent Foo(vm["my_ushort"].as<unsigned short>()); Foo(vm.at("my_ushort")); Granted, this won't work in cases where the destination type is ambiguous or undiscoverable (ie: if Foo was overloaded to accept floats as well), but for many cases the convenience is nice. In those cases where your destination type does not match the variable type, you will get a bad_any_cast exception, just as you would with "as()". Does anyone think would be a worthwhile addition to program_options? Thanks, Josh # svn diff against the trunk Index: boost/program_options/variables_map.hpp =================================================================== --- variables_map.hpp (revision 72996) +++ variables_map.hpp (working copy) @@ -74,6 +74,23 @@ return boost::any_cast<T&>(v); } + /** Same as "as()" but allows you to use a simpler syntax: + Ex: // Given the function Foo as: + void Foo(unsigned short val); + // The following are equivalent + Foo(vm["my_ushort"].as<unsigned short>()); + Foo(vm.at("my_ushort")); */ + template<class T> + operator const T& () const { + return boost::any_cast<const T&>(v); + } + + /** @overload */ + template<class T> + operator T& () { + return boost::any_cast<T&>(v); + } + /// Returns true if no value is stored. bool empty() const; /** Returns true if the value was not explicitly

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Re: [boost] SortedVector
by Spencer Collyer 10 Jul '11

10 Jul '11

Please ignore - sent to list by mistake

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[Locale] New Relase 4.0.0 (pre-merge to trunk)
by Artyom Beilis 10 Jul '11

10 Jul '11

Hello All, I've released new version of Boost.Locale I'm going to integrate to svn-trunk... It includes the fixed that where brought on the review: 1. Updated date_time iterface to be more consistent with Boost.DateTime and Boost.Chrono. 2. Redesigned Boundary interface, to be more Boost.Regex like: segment_index that iterate over segment objects and boundary_point_index that iterate over boundary_point objects and use iterator_facade. 3. Redesigned messages interface so it allows to use wide strings and non-US-ASCII strings as keys. 4. Added an index to documentation allowing to easy browsing the documentation. 5. Overall improved documentation: - More terms and clarified - Added documentation on getting gettext for windows. - More samples and outputs provided and more. 6. General code cleanup of issues that had were brought up in the review. Documentation: http://cppcms.sourceforge.net/boost_locale/html/ Downloads: https://sourceforge.net/projects/cppcms/files/boost_locale/ So I'm planning to start the integration of this version to Boost svn tree. It should be the closest version to the final code. Best Regards, Artyom Beilis -------------- CppCMS - C++ Web Framework: http://cppcms.sf.net/ CppDB - C++ SQL Connectivity: http://cppcms.sf.net/sql/cppdb/

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[doxygen] CSS/Temple files for Doxygen
by Artyom Beilis 10 Jul '11

10 Jul '11

Hello, Where can I find CSS files/Template files suitable for Doxygen documentation generation? So I can make Doxygen output to have more Boost-like style. Artyom Beilis -------------- CppCMS - C++ Web Framework: http://cppcms.sf.net/ CppDB - C++ SQL Connectivity: http://cppcms.sf.net/sql/cppdb/

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[system] How are users expected to learn Boost.System?
by Lee Richmond 10 Jul '11

10 Jul '11

Hi, Since Boost.System doesn't appear to have any documentation other than its reference section, I'm wondering how users are expected to really learn this library? It would be nice if a tutorial section could be added to its documentation, including tutorials outlining how to extend the library with our (the library user) own error sources. That is: when to extend, what to extend and how to extend. The unclickable "Tutorial" link currently on the library's home page almost feels like a slap in the face ;) Thanks, Lee.

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[1.47.0] Any remaining showstoppers?
by Beman Dawes 09 Jul '11

09 Jul '11

Any remaining 1.47.0 showstoppers? I'm still waiting for an OK to merge http://svn.boost.org/trac/boost/changeset/72855 Are there any other merges ready to go that still need permission to merge? --Beman

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Bugs in regression/library_status.cpp on Windows
by Robert Kawulak 09 Jul '11

09 Jul '11

Hello, I've stumbled upon several bugs in tools/regression/src/library_status.cpp when compiling on Windows with gcc 4.5 and msvc 10.0. I'm attaching a patch file with all necessary fixes. The bugs are: - using path::native() instead of path::string() - the former is wstring on Windows, - calling path::string() twice to obtain begin() and end() iterators - on Windows path::string() returns a temporary, so the iterators point to different objects, - using whole path for each node in build_node_tree() instead of only the directory name, - using whole path instead of only the test name in do_table_body(), - the link to links file is relative to test directory, not to the results output directory, - generation of closing "</a>" without opening "<a>". Best regards, Robert

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Re: [boost] Logging library
by Ivan Le Lann 09 Jul '11

09 Jul '11

----- "Tigran Hayrapetyan" <tigran.human(a)gmail.com> a écrit : > Hello dear Boost community > (...) > Existing logging libraries which I used, are writing log messages > linearly, > just one after another. > In contrast, as we know, almost any application's working structure is > not > linear, but hierarchical instead, i.e. functions which call other > functions, > and so on. (...) > So I decided to implement such logging library. I put it in namespace > "tlog" > by now, for "Tree Logging". In my implementation hierarchical messages > are > presented in XML format, as it is some standard for tree-like data. > There are two attached files. The library itself is in "tlog.hpp" > file, and > "main.cpp" contains a sample application which is using the library > and > writes log to "tlog.xml" file. They are written in MS Visual Studio > 2008. > Log messages are written with help of 4 macros: > > TLOG_INFO( Logger, Text ) : logs > message > with specified text to specified logger with priority "information" > TLOG_WARNING( Logger, Text ) : logs > message with > specified text to specified logger with priority "warning" > TLOG_ERROR( Logger, Text ) : logs > message > with specified text to specified logger with priority "error" > TLOG_SCOPED_NODE( Logger, NodeName ) : opens xml element in > the log > file. The element will be closed at the end of scope, so there is no > need to > close it manually. > > I think that the best way to implement entering/leaving subnodes of > the log > file, is to use scopes of the code. > > Please review run result and the code, and see if it can be useful > for boost. Have you tried Boost.Log and its attributes ? http://boost-log.sourceforge.net/libs/log/doc/html/log/detailed/attributes.… http://boost-log.sourceforge.net/libs/log/doc/html/log/detailed/utilities.h… Ivan

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