November 2009 - Boost - lists.boost.org

[GGL] performance
by Barend Gehrels 17 Nov '09

17 Nov '09

Hi list, As there were doubts expressed on this list regarding performance in more challenging environments, an additional test is provided. The resulting figures of GGL are still good, sometimes the best, sometimes the second best. For example, for a union on polygons with many diagonals, holes, and many points on both inputs: ggl 3.6 seconds b.p. 7.8 seconds terralib 8.2 seconds geos 35.9 seconds cgal 77.8 seconds (a cgal-intersection (instead of union) is the fastest in these tests) Polygons have large diagonals, holes are tested, and the number of vertices of both input polygons can be varied in the tests. More information: http://trac.osgeo.org/ggl/wiki/IntersectionStarComb, including references to sources for reproducing the figures, everyone is invited to do that. Regards, Barend

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[serialization] warnings in debug build
by Christoph Duelli 17 Nov '09

17 Nov '09

building vs trunk I got (only in my debug build): boost/archive/basic_binary_oarchive.hpp:89: warning: comparison is always true due to limited range of data type boost/archive/basic_binary_oarchive.hpp:95: warning: comparison is always true due to limited range of data type boost/archive/basic_binary_oprimitive.hpp:163: warning: comparison between signed and unsigned integer expressions boost/archive/basic_binary_iprimitive.hpp:154: warning: comparison between signed and unsigned integer expressions Best regards Christoph

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[Boost.Locale] For Preliminary Review of Boost Community (with Full documentation)
by Artyom 17 Nov '09

17 Nov '09

Hello All, I had written a Boost.Locale library that provides high quality localization facilities in C++ way. This library uses internally ICU library to provide all facilities: - Correct case conversion, case folding and normalization - Collation including support of 4 Unicode collation levels. - Date and time formatting and parsing - Number formatting, spelling and parsing - Monetary formatting and parsing - Powerful message formatting including support plural forms, using GNU catalogs. - Character, word, sentence and line-break boundary analysis. - Codepage conversion - Support of 8-bit character sets like Latin1 and UTF–8 encoded text. - Support of char, wchar_t and C++0x char16_t, char32_t strings and streams. I've tested it with: - Linux GCC 4.1, 4.3. with ICU 3.6 and 3.8 - Windows MSVC-9 (VC 2008), with ICU 4.2 - Windows MingW with ICU 4.2 - Windows Cygwin with ICU 3.8 Documentation: ============== Full tutorials: http://cppcms.sourceforge.net/boost_locale/docs/ Doxygen reference documentation: http://cppcms.sourceforge.net/boost_locale/docs/doxy/html/ Source Code: ============ https://cppcms.svn.sourceforge.net/svnroot/cppcms/boost_locale/trunk Building: ========= At this point I hand't written any JAM files yet and I use CMake. So checkout the code, and run cmake /path/to/boost_locale/libs/locale You need to have ICU 3.6 or above installed on your system. 4.2 and above recommended It is mandatory dependency. Notes for MSVC Users ==================== In many examples I write: wstring tmp=L"שלום עולם!"; // Unicode string In order to make these examples work correctly source code should include BOM to let MSVC know that the text is UTF-8 and not ASCII... So when you try to compile examples convert files in order to make them work correctly. Todo List ========= - Create a good set of unit tests - More boostification (Jam, etc) I'm waiting for your inputs Artyom Beilis

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[Boost] [GGL] Bost.Polygon (GTL) vs GGL - rationale
by Jose 17 Nov '09

17 Nov '09

Hi, I am trying to understand the goemetry libraries. I find the currently under review GGL very useful for non-cartesian geometries (and maybe cartesian too!) but I don't understand what was the rationale for accepting GTL, which is a library mainly used in chip design. The reviews for GTL clearly stated that the library was not appropiate for GIS-like applications as its focus is mainly 2D. So, can anybody explain how these two libraries fit together. I see in which cases GGL will be useful but I am rather confused with Boost.Polygon, as it's optimized for VLSI design (as stated in the BoostCon paper and by some of the reviewers) Did someone decide that it was not possible to have a single GENERIC GEOMETRY library and we should have two ? thanks

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[move][container] Review Request (new versions of Boost.Move and Boost.Container in sandbox and vault)
by Ion Gaztañaga 17 Nov '09

17 Nov '09

Hi to all, I've just uploaded to boost sandbox... http://svn.boost.org/svn/boost/sandbox/move/) and Boost.Vault... http://www.boostpro.com/vault/index.php?action=downloadfile&filename=boost.… ...new versions of libraries Boost.Move and Boost.Container. Online documentation can be found here: Boost.Move http://svn.boost.org/svn/boost/sandbox/move/libs/move/doc/html/index.html Boost.Container http://svn.boost.org/svn/boost/sandbox/move/libs/container/doc/html/index.h… I would like to request a review for both libraries. Boost.Move is quite small (just one header). Boost.Container depends on Boost.Move and Boost.Intrusive so you must download also the post-1.40 version of Intrusive placed in the same package (Boost.Container uses new features from Intrusive not included in Boost 1.40). Just take fresh Boost 1.39 folder and overwrite it with package contents. ************************ What's new in Boost.Move: ************************ ->The library has been modified to support moving rvalues of copyable AND movable types, a limitation of the previous version. This changes where proposed by Klaus Triendl in this thread: http://lists.boost.org/Archives/boost/2009/06/153266.php The library has now new macros to declare copyable and movable types and movable only types. Old macros are still there for backwards compatibility (specially unordered library which was also ported to this move sandbox) but I expect to remove them if current approach is considered better. ->Updated documentation and tests. ************************ What's new in Boost.Container: ************************ -> Added tests and documentation -> Updated the library to the new Boost.Move macros * * * I've tested both libraries in Windows XP using the following compilers: Visual 7.1, Visual 8.0, Visual 9.0, Intel 10.0, Mingw-gcc 4.3 and Mingw-gcc 4.3 in C++0x mode. The library should work on any C++03 conforming compiler Best, Ion

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[random] Compilation errors in linear_congruential.hpp because of min()/max()
by Hartmut Kaiser 17 Nov '09

17 Nov '09

Hi, I'm getting compilations errors against Boost trunk from inside linear_congruential.hpp:+89 on VS2010 because of min()/max() being used without safeguarding them against accidental macro substitution: assert(_x >= min()); assert(_x <= max()); if I replace this with assert(_x >= (min)()); assert(_x <= (max)()); the compiler errors go away. Regards Hartmut ------------------- Meet me at BoostCon http://boostcon.com

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[Function] Interest in boost::functions that take and return references to self-type?
by Tony Astolfi 17 Nov '09

17 Nov '09

Would there be interest in adding a feature to boost::function that allows a function to accept as input and return values of the same type as itself? I think this would be useful for implementing state machines. Something like: typedef boost::function< boost::function_self_type (event const&) > state_transition_fcn; state_transition_fcn initial_state (event const& e); state_transition_fcn second_state (event const& e); state_transition_fcn initial_state (event const& e) { if (/* some predicate on e*/) { // go to new state return &second_state; } else { // stay in old state return &initial_state; } } state_transition_fcn current_state = &initial_state; while (more_events) { current_state = current_state( next_event ); } -Tony Astolfi ps. Please point me in the right direction if such a thing already exists! Thanks!

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[Review] We're halfway through the GGL review
by Hartmut Kaiser 16 Nov '09

16 Nov '09

Hey all, We're halfway through the GGL review (see attached review announcement) it is planned to end November 15th. Now would be a good time to send in your reviews! Regards Hartmut ------------------- Meet me at BoostCon http://boostcon.com

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[Locale] Boost.Locale - preliminary code
by Artyom 16 Nov '09

16 Nov '09

Hello, I'm working on Boost.Locale project. Source code and some basic examples can be found here: https://cppcms.svn.sourceforge.net/svnroot/cppcms/boost_locale/trunk/ It still lacks of documentation and some features. It is mostly tested under Linux gcc-4.3 and it seems to work under MSVC-9 (however I had less tested it). General description: ==================== Boost.Locale is a library that brings high quality localization facilities in C++ way. It uses `std::locale`, and `std::locale` facets in order to pro- vide localization in transparent and C++ aware way to user. C++ has quite good base for localization via existing C++ locale facets: `std::num_put`, `std::ctype`, `std::collate` etc.. But they are very limited and sometimes buggy by design. The support of localization varies between different operating systems and incompatible between them. On the other hand, there is great, well debugged, high quality, widely used ICU library that gives all of the goodies but, it has very old API that mimics Java behavior, it is completely ignores STL and provides useful API only for UTF-16 encoded text, ignoring other popular Unicode encodings like UTF-8 and UTF-16, or limited national character sets like Latin1. Boost.Locale provides the natural glue between C++ locales framework, iostreams and powerful ICU library in following areas: - Correct case conversion, case folding and normalization (DONE) - Collation including support of 4 Unicode collation levels. (DONE) - Date and time formatting and parsing including support of timezones and calendars other then Gregorian. (DONE) - Number formatting, spelling and parsing (DONE) - Monetary formatting and parsing (DONE) - Powerful message formatting including support plural forms, using GNU catalogs. (DONE) - Character, word, sentence and line-break boundary analysis. (TODO) - Support of 8-bit character sets like Latin1 and UTF-8 encoded text. (DONE) - Support of `char`, `wchar_t` and C++0x `char16_t`, `char32_t` strings and streams. (DONE) ------------------------------------------------------------ FYI, It is still work in progress but 90% of the job is done. Please take a look on it --- especially experts in Windows programming. I would glad if someone explains me the process of submission and what should be done for it. I know that it is not yet Boost ready but it goes fast in this direction. Best, Artyom.

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[1.41.0] Beta 1 available
by Beman Dawes 16 Nov '09

16 Nov '09

Boost release 1.40.1 beta 1 is available from SourceForge: http://sourceforge.net/projects/boost/files/ This release contains one new libraries and numerous bug fixes for existing libraries. For details, see http://beta.boost.org/users/news/version_1_41_0for details. To install the beta on your system, see http://beta.boost.org/doc/libs/1_40_0/more/getting_started/index.html Please report any problems with the beta on the developers or users mailing list. Unless unexpected problems arise, the plan is to ship the final 1.40.0 release in a week to ten days. Thanks, --The Boost release team

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