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Minor mistake in getting_started.html
by Michael Stevens 23 Sep '04

23 Sep '04

The example in section 2.2 reads bjam "-sGCC_ROOT=/usr/local/gcc-3.3.2" this should be bjam "-sGCC_ROOT_DIRECTORY=/usr/local/gcc-3.3.2" I will commit this change if look correct to everyone -- Michael

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Re: [boost] [Test] Current failures
by Jonathan Wakely 23 Sep '04

23 Sep '04

On Thu, Sep 23, 2004 at 01:01:15PM +0100, Jonathan Wakely wrote: > On Thu, Sep 23, 2004 at 06:22:58AM -0500, Aleksey Gurtovoy wrote: > > > Gennadiy, > > > > Could you please take a look at/comment on the current Boost.Test > > failures as per http://tinyurl.com/5wojs? > > Attached patch fixes the failures. ^ test - token_iterator_test / gcc-3.4.x sorry - failed to paste in the string that identified what i was talking about! > > jon -- I would like to suggest that you not use speed, and here's why: it is going to mess up your heart, mess up your liver, your kidneys, rot out your mind. In general this drug will make you just like your mother and father. - Frank Zappa

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[serialization] white cells (continued)
by Stefan Slapeta 23 Sep '04

23 Sep '04

I don't know if that's the same as in boost.python but the serialization library now shows up white cells, too: http://tinyurl.com/3pvzv It's remarkable that all these are results of compile or compile-fail tests and the tests would succeed if they are reported correctly. I attach an excerpt of my bjam.log: please have a look at it, it seems to me that everything is correct except the interpretation of the results. Stefan ***************************************************************************** ** ** ** WARNING: This email contains an attachment of a very suspicious type. ** ** You are urged NOT to open this attachment unless you are absolutely ** ** sure it is legitmate. Opening this attachment may cause irreparable ** ** damage to your computer and your files. If you have any questions ** ** about the validity of this message, PLEASE SEEK HELP BEFORE OPENING IT. ** ** ** ** This warning was added by the IU Computer Science Dept. mail scanner. ** *****************************************************************************

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[assign] fixes for msvc, msvc-stlport and vc7
by Joaquín Mª López Muñoz 23 Sep '04

23 Sep '04

The attached fix makes all tests compile for msvc (not all run, though) and hopefully also for the other two toolsets (can't try myself.) Two changes applied, both in list_insert.hpp: 1. MSVC++ 6.0/7.0, in the presence of a templated memfuns, interprets additional overloads as if they were specializations of the former (which is not legal C++, AFAIK). This introduces problems with the copy ctors of list_insert, which can be workarounded by a) making the template copy ctor accept const references b) declaring and defining the plain default copy ctor of list_insert *after* the templated copy ctor. 2. list_insert::operator()(T t) has been changed to accept a const reference instead. With these changes, all tests build, though three of them crash at run-time (list_inserter, list_of and multi_index_container) I've checked the changes with a compiler other than MSVC (GCC 3.2), seems like nothing ain't broken. I've got two questions: 1. Could somebody (the author, I guess) validate these changes for commit? 2. list_inserter follows a strange convention (IMHO) of not forcing template params to be const references in its various copy ctors and assignment operators, for instance: list_inserter( Function fun ); template< class T > list_inserter& operator=( T r ); Any reason for this approach? I don't know if this can pose problems, but to me having these qualified with const & seems like the usual way. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo 164c164 < --- > 168,170d167 < list_inserter( const list_inserter& r ) : insert_( r.insert_ ) < {} < 172c169 < list_inserter( list_inserter<Function2,Arg> r ) --- > list_inserter( const list_inserter<Function2,Arg>& r ) 175a173,175 > list_inserter( const list_inserter& r ) : insert_( r.insert_ ) > {} > 239c239 < list_inserter& operator()( T t ) --- > list_inserter& operator()( const T& t )

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[utility] fixes for assert_test and current_function_test
by Joaquín Mª López Muñoz 23 Sep '04

23 Sep '04

Again, BOOST_NO_STDC_NAMESPACE-related trivial fixes, which make the two tests pass for intel-win32-7.1-vc6, msvc and msvc-stlport (for the two latter, current_function_test passes but produces no useful result, as there's no __func__ macro or similar available for these platforms. Anyone sees a problem with these fixes? Thanks PS: I could just go commit these trivialities without consulting, but I'd rather leave a trace at the mailing list just in case some problem arises. Sorry for the noise caused. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo 53a54 > #include <boost/config.hpp> 60c61,65 < std::printf("Expression: %s\nFunction: %s\nFile: %s\nLine: %ld\n\n", expr, function, file, line); --- > #if !defined(BOOST_NO_STDC_NAMESPACE) > using std::printf; > #endif > > printf("Expression: %s\nFunction: %s\nFile: %s\nLine: %ld\n\n", expr, function, file, line); 20a21 > #include <boost/config.hpp> 25c26,30 < std::printf("%s(%ld): %s in function '%s'\n", file, line, msg, func); --- > #if !defined(BOOST_NO_STDC_NAMESPACE) > using std::printf; > #endif > > printf("%s(%ld): %s in function '%s'\n", file, line, msg, func);

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Re:[boost] Re: Re:[serialization] one MSVC build fix
by Robert Ramey 23 Sep '04

23 Sep '04

Tony Juricic wrote >I know. But, in the end, to do the real work, debugging and testing in any >particular environment, we have to stick with the particular compiler and >particular platform. No cross-platform build tool is going to help in that >case. That's why I consider generic build tool fantasies a major waste of >developer's time and resources. Sorry, got to disagree here. I use VC 7.1 compiler and IDE as my main compiler and environment. In general it very good, integrated help, simple editor, powerful debugger. On the other hand it hangs up from time to time and this drives me crazy - still I've tried a lot different ones and I like this the best. However, sticking to one compiler is a big mistake if you want to make good code. All compilers have problems. One problem is that all pass some invalid code as valid. It fools you into thinking there's no bugs or worse, hides your bugs so you can't find them. Also C++ is so complex now (too complex?) that I can't understand the error message half the time. Then when I do I'm left wondering if it's a compiler bug or is it that I don't understand what's going on. So, I've added a number of compilers to my external tools list so I can compile (can't link) write from the IDE with borland, Commeau, G++, and (until it expired) Metrowerks. So when I think some thing is correct or I know its not but can't figure out why, applying several compilers to the code module is indispensable. In this day in age, it's the only practical way to make correct portable C++ code. Honestly, I think that C++ is just to complex to make a correct compiler for. (I know someone is going to take exception to that - Sorry in advance - no offense intended). So here we are. For final build and test I use bjam. Bjam also drives me crazy. I've managed to work with it and I believe that it (or something equivalent) is indispensable for a truly portable project and I haven't found anything better - but still it drives crazy. I understand efforts to improve it are in the works and I look forward to seeing them. However, the main problem is that it seems to take a huge amount of time to understand and learn how to use. I don't know if that's going to change. Robert Ramey

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What happened to the Command Line & Config library by Vladimir Prus?
by Hendrik Schober 23 Sep '04

23 Sep '04

Hi, I found this http://article.gmane.org/gmane.comp.lib.boost.announce/24 but couldn't find the lib at http://www.boost.org/libs/libraries.htm What happened to it? TIA, Schobi -- SpamTrap(a)gmx.de is never read I'm Schobi at suespammers dot org "Sometimes compilers are so much more reasonable than people." Scott Meyers

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RE: [boost] Re: Formal review of "Output Formatters" library begi nstoday
by Rozental, Gennadiy 23 Sep '04

23 Sep '04

> Rozental, Gennadiy wrote: > >Here some more details: > > > > > 1. What is your evaluation of the design? > > > >Library trying to solve in fact trivial problem. Would it be > presented > >as trivial function > > > >Template<typename C> > >Foo( C const& c, std::string open, std::string close, > std::string sep > >); > > > >I may understand it. > > This would mean that you would duplicate code for rendreing > container types. What code? I have only one function. Could you please be more specific. In worse case I will have as many function as many different UDT I want to support. But this is also the case for you. > Also, you are missing special formatting, e.g. wrapping > open/close values > around elements, e.g.: Yeah, maybe. My solution is 5 lines. You solution is 170K of code. I could afford to repeat my function twice would I need to add extra grist. > std::cout << formatob( vec, containerfmt( > wrappedfmt().format( "<e>", > "</e>" )).format( "<l>", "</l>" )); // output: <l><e>a</e><e>b</e></l> And again, why would I do this? This code is looking for trouble. How long will it be until I mistype open/close brackets differently? > > the indentation functionality that Volodya has expressed an > interest in, and > position-based output, e.g.: > > [0] John, [1] James, [2] Marina I wonder how your interface would look like. Anyway it's not a part of submitted library. Once you presented it we may discuss it. > Also, the library should be usable on a standard stream. This > is one of the > key design aims. Can you do: > > std::cout << Foo( vec, "< ", " >", " :: " ); > > ? This requires returning an object that has << implemented. > The mechanism > for this is outlined in the standard by using *manipulators*. > Thus, you > would need that class to defer processing to the Foo function > if you want to > use your approach. *If* I want usual ostream interface, I do need to add one function object (note that it does not matter how many UDT I want to support). > > > 2. What is your evaluation of the implementation? > > > >In most part I either don't understand or don't like it. IMO simple > >task library trying to solve shouldn't require that much > code. Simple > >overloading base solution should've done the trick. > > This does not allow for flexibility to add indenting, wrapped > data, etc. I do not think it's true statement. See my other post. > > > 4. What is your evaluation of the potential usefulness of the > > > library? > > > >Now to the most important: why would I ever want to use library like > >this? > > > >We have already: > >std::ostream > >boost::format > >boost::serailization > > > >In what scenario I would use this library? > > But you can't do: > > std::vector< int > vec; > std::cout << vec; // oops! no operator << defined for vectors. Then I will write one. The thing is: I believe what library need to bring more value than just a substitution for 5 lines of custom code (especially since it not that flexible, and any step to the side causing you to write more code that custom solution would require you to). > >I most definitely wouldn't want to repeat all this formatting every > >time I need to output my vector. > > If you want [ a, b, c, d ] style output, you don't. The extra > machinery is > used to customize this. What if I want { a, b, c, d } for all my vectors? I could write global operator << using your library, using custom loop or using my trivial Foo above. I do it once. So where is the win for your solution? > Also, you can save a format object, e.g.: > // old style > containerfmt_t< char, pairfmt_t< char > > > myformat = containerfmt( pairfmt().format( " = " )).format( "<< ", " > >>" ); > > std::cout << formatob( vec, myformat ); // << ( a = 5 ), ( > b = 7 ), ... > >> > std::cout << formatob( lst, myformat ); // << ( i = 2.132 ), ( j = > 3.14159 ), ... >> > std::cin >> formatob( vec, myformat ); And now I need to write std::cout << formatob( lst, myformat ); every time I print list? No, thank you. > >If I write output operation rarely - I would use explicit loop -it's > >more flexible anyway. > > Depends what you are outputting. If the type contains nested > containers, it > can be more complex. Maybe. But compare user base for container over scalar types with multilevel containers. > >I wouldn't use this library for XML printing - why would I want to > >mention tag name twice? > > You can use a wrapper format object: > > std::cout << formatob( vec, containerfmt( > wrappedfmt().format( "<e>", > "</e>" )).format( "<l>", "</l>" )); // output: <l><e>a</e><e>b</e></l> I can. But I won't. And wouldn't recommend. See above. > Regards, > Reece Gennadiy.

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RE: [boost] Proper threading (Was: Formal review of "Output Formatters"library beginstoday )
by Reece Dunn 23 Sep '04

23 Sep '04

Vladimir Prus wrote: >Rozental, Gennadiy wrote: > > Hi, > > > > I would like to start with resolution. I vote NOT to accept this > > submission. > >Gentlemen, may I ask that you use mailers which preserve correct threading? >In >particular, in review of the outfmt library, each message from Reece, >Robert >and Gennadiy is completely unrelated to the thread, missing the >"References" >and "In-reply-to" headers. > >This makes follow the thread a nightmare. Even web-based mailers nowdays >support proper threading. What do you do to break it? I am using the free version of Hotmail. I have filters to move the files from my inbox into a designated folder and hit "Reply" to reply to the messages. Regards, Reece _________________________________________________________________ It's fast, it's easy and it's free. Get MSN Messenger today! http://www.msn.co.uk/messenger

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[Range] Current status?
by Aleksey Gurtovoy 23 Sep '04

23 Sep '04

Is the library really in a releasable state? The current test failures (http://tinyurl.com/5ch8u) don't look that good to me. In particular, half of the tests legitimately fail with CodeWarrior 8.3/9.3, and some failures on STLPort configurations (this one, for instance -- http://tinyurl.com/4lvkw) appear to be legitimate as well. -- Aleksey Gurtovoy MetaCommunications Engineering

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