May 2005 - Boost - lists.preview.boost.org

Formal Review: FOREACH macro
by Gennadiy Rozental 09 May '05

09 May '05

The formal review of Eric Nibbler's FOREACH macro starts today, April 25, and will continue until Monday, May 1st. I will be serving as review manager. BOOST_FOREACH is a macro that makes it simple to iterate over STL containers, ranges, arrays and null-terminated strings. Its performance approaches that of the hand-coded equivalent loop. BOOST_FOREACH uses Boost.Range can be extended to iterating user-defined collections by extending Boost.Range. The library is available at: http://boost-sandbox.sourceforge.net/vault/index.php?directory=eric_niebler foreach.zip Please note that the documentation is also available separately from the sources. It also can be viewed online at: http://boost-sandbox.sourceforge.net/libs/foreach The library is known to work (with different compliance levels) at least on the following compilers: * Visual C++ 7.1 * Visual C++ Whidbey Beta * Visual C++ 7.0 * Visual C++ 6.0 * gcc 3.3.3 * Intel for Windows 8.0 * Intel for Windows 7.0 * Comeau 4.3.3 When submitting reviews, please state explicitly whether or not you believe that the library should be accepted into Boost. For more information on the Boost formal review process, please see http://www.boost.org/more/formal_review_process.htm. Gennadiy

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Re: [boost] (Named) Parameter Library
by Cromwell Enage 09 May '05

09 May '05

Daniel Wallin wrote: > Yes, that's correct. Although the code has been moved > to the Boost CVS and the namespace has been changed > to 'parameter'. Oh, that's where it is, now. Cool! A second look at the new code revealed that much of the type-extraction functionality I sought has already been implemented in <boost/parameter/aux_/arg_list.hpp>, under the nested struct 'key_value_type' (lines 71-78 and 186-196). However, this struct is defined only for older compilers. Can the definitions be moved out of the conditional macro blocks? That way, a type-extraction metafunction like the following would work: template < class ArgList, class KW, class Default > struct get_key_value_type : mpl::apply2< typename ArgList::key_value_type , KW , Default > { } > Thank you. I've merged your macro change into the > trunk, but I'm holding off the type-extraction code > until we have completed the changes we are currently > working on. No problem. Just don't take too long! My multi-state mazes project makes heavy use of this library. I'm currently working on documentation and a 2-D demo, and I hope to release it to the OS community in three or four weeks. Cromwell D. Enage __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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archive's i/o register_type() signature (Bug#308291: please prevent compiler warning about unused variable)
by Domenico Andreoli 09 May '05

09 May '05

hi, boost debian package has been reported this bug/wish. is anybody able to commit this tiny fix? many thanks. cheers domenico ----- Forwarded message from martin f krafft <madduck(a)debian.org> ----- Date: Mon, 9 May 2005 09:59:43 +0200 From: martin f krafft <madduck(a)debian.org> Subject: Bug#308291: please prevent compiler warning about unused variable Some of us like to use -Werror. Some of boost does not. Please consider the following, non-intrusive and tested patches: diff -u /tmp/interface_oarchive.hpp /usr/include/boost/archive/detail/interface_oarchive.hpp --- /tmp/interface_oarchive.hpp 2005-05-09 09:54:24.897652747 +0200 +++ /usr/include/boost/archive/detail/interface_oarchive.hpp 2005-05-09 09:54:56.611522300 +0200 @@ -57,7 +57,7 @@ } template<class T> - const basic_pointer_oserializer * register_type(T * t = NULL){ + const basic_pointer_oserializer * register_type(T * = NULL){ const basic_pointer_oserializer & bpos = instantiate_pointer_oserializer( static_cast<Archive *>(NULL), diff -u /tmp/interface_iarchive.hpp /usr/include/boost/archive/detail/interface_iarchive.hpp --- /tmp/interface_iarchive.hpp 2005-05-09 09:58:24.366913089 +0200 +++ /usr/include/boost/archive/detail/interface_iarchive.hpp 2005-05-09 09:58:31.519755952 +0200 @@ -53,7 +53,7 @@ } template<class T> - const basic_pointer_iserializer * register_type(T * t = NULL){ + const basic_pointer_iserializer * register_type(T * = NULL){ const basic_pointer_iserializer & bpis = archive::detail::instantiate_pointer_iserializer( static_cast<Archive *>(NULL), ----- End forwarded message ----- -----[ Domenico Andreoli, aka cavok --[ http://people.debian.org/~cavok/gpgkey.asc ---[ 3A0F 2F80 F79C 678A 8936 4FEE 0677 9033 A20E BC50

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Re: [boost] Visual Studio 2005 Beta 2 + Multi Index
by JOAQUIN LOPEZ MU?Z 09 May '05

09 May '05

----- Mensaje original ----- De: Gordon Smith <schmoo2k(a)hotmail.com> Fecha: Viernes, Abril 22, 2005 5:43 pm Asunto: [boost] Visual Studio 2005 Beta 2 + Multi Index > The following stdafx.h for a vanilla console app kills the beta 2 > compiler > (I think it creates a corrupt PCH file): > > #pragma once > > #define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from > Windows > headers > #include <windows.h> > #include <tchar.h> > > // BOOST --- > #include <boost/multi_index/sequenced_index.hpp> > #include <boost/multi_index/ordered_index.hpp> > Hi Gordon, excuse my late answering, somehow I just didn't see your post amidst the current flow of messages. Did this work for MSVC 8.0 beta 1? I'm afraid I cannot help much here except suggest that you try to report this to the MSVC dev team: http://lab.msdn.microsoft.com/productfeedback/ Also, please try deleting all intermediate files before doing a fresh compile --this is sometimes helpful specially in regard to PCHs. If you make any progress or need some help please keep me informed. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo

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Re: [boost] [1.33] type traits VC8 fixes and the release schedule
by Ralf W. Grosse-Kunstleve 09 May '05

09 May '05

--- John Maddock <john(a)johnmaddock.co.uk> wrote: > Anyway I'll go ahead with the change, and if it bytes back too badly, I'll > just revert the lot. Some positive feedback: I tried the changes out on a whole bunch of platforms (http://cci.lbl.gov/cctbx_build/show_results.cgi?build_tag=2005_05_08_0558) and the CVS from about 24 hours ago works flawlessly everywhere. I am mainly testing Boost.Python compilation. Cheers, Ralf __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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Calling a python function from C++ to update a progress display widget
by Thierry Lam 09 May '05

09 May '05

Let's say I have the following in a Python file called progress.py: pbar = gtk.ProgressBar() def updateBar(): pbar.puls() In C++: for ( int i = 0; i < 10; i++ ) // Call the python method updateBar() which is not a member of any class in progress.py How do I do it? I'm aware of the following 2 functions in boost: call<ResultType>(callable_object, a1, a2... aN); call_method<ResultType>(self_object, "method-name", a1, a2... aN); Can I see an example on how to use them? My goal is to display the progress bar widget live while the for loop is counting from 0 to 9.

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[string algorithms] feature request - case-insensitive less
by Joe Gottman 09 May '05

09 May '05

I was looking at the string algorithms library, and I saw it had a case-insensitive equals function, iequals, as well as a predicate class, is_iequal. It would be nice if there were a case-insensitive less-than function and predicate as well. This would facilitate case-insensitive sorting, and set or maps which are sorted case-insensitively. Joe Gottman

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[filesystem] gcc-3.4.3, fstream_test
by Rene Rivera 09 May '05

09 May '05

For this sole failure on the tests that I run: http://tinyurl.com/92zns I did some investigation and narrowed the problem down to this: ===basic_iostream_char_test.cpp=== #include <fstream> struct my_fstream : public std::basic_fstream<char> { my_fstream() : std::basic_fstream<char>("basic_iostream_char_test.cpp") { } }; int main(int argc, char** argv) { my_fstream f; } ===basic_iostream_char_test.cpp=== Which gives a link error of: undefined reference to `std::basic_iostream<char, std::char_traits<char> >::~basic_iostream()' And AFAICT that particular dtor is not in libstdc++. And for that matter the entire std::basic_iostream<char,..> instance is missing. The strange aspect of this is that this exact test passes on Martin's tests. And of course it's only with this particular gcc. When I compile with 3.3.5, on the same machine, the symbols exist. Could others try compiling the above code? Just need to see if it's just my machine that has this problem before I file a GCC bug report. --grafik

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RE: [boost] Logging Library -- Formal Review Request
by Roman Yakovenko 08 May '05

08 May '05

John Torjo wrote: > > I've just updated the Boost Log Library: > http://torjo.com/code/logging-v132.zip > > > I would also like to ask for a _Formal Review_. > > > > The Boost Log Library is a small library, who: > * makes it very easy to declare/define new logs > * allows you very simple access to logs > * allows for log hierarchies, and for modifying log hierarchies > * allows for easy and efficient enabling/disabling of > logs/log hierarchies > * allows for easy manipulation of log behaviors > (the log's destination(s) and/or adjusting the original message) > * is thread-safe > > Using the library in code is easy and straightforward: > > int i = 1, j = 2, k = 3; > BOOST_LOG(app) << "testing " << i << '-' << j << '-' << k << > std::endl; > BOOST_LOG(dbg) << "this is a debug message, i=" << i << std::endl; > BOOST_LOG(info) << "I just wanted to tell you something...."; > Hi. If I understand right the code, even if log is disabled, I do pay for constructing log messages. Am I right? If so why do you force this? Roman

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Boost.Test: to-do
by Gennadiy Rozental 08 May '05

08 May '05

Hi, Here is a list of some of the to-do items that I plan to address soon: * I plan finish finally update for CLA support * Once it's done: selective test cases run by name * Boost.Test thread safety need to be achieved at least if BOOST_TEST_THREAD_SAFE is defined. This one will require separate discussion * Some performance testing tools (aka profiler). Unless somebody else will come up with something like this * Build info feature needs to be updated: there are at least two different "build infos": library build and test module build * Auto linking for Boost.Test. Also I really need to work on more tutorial documentation. Two projects that could be very interesting. But I may not be able to do it by myself: * I would like to write an add-on for Visual Studio to automate test case/test modules generation * I may be convenient to have an external test runner: utility that load some libraries dynamically initialize test it contains and execute all/some of them. I was able to make Boost.Test work sunpro 5.3. HP compiler is still a mystery. Any help appreciated. I've made an attempt to implement a DLL version of Boost.Test on windows. And failed. As things looks now it's impossible or at least may require some interface changes. Any help in this direction are greatly appreciated either. If you have any suggestions (or made them before and I forgot about it), here would be a good place to speak up. Regards, Gennadiy

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