- Boost - lists.boost.org

Re: [boost] string_to/to_string (was: Re: Report from Berlin C++ Standards Committee meeting)
by Reece Dunn 16 Apr '06

16 Apr '06

Martin Adrian wrote: > David Abrahams <dave <at> boost-consulting.com> writes: > > > Was there any discussion of the to_string(x) and string_to<T>(x) > > alternative? > > I am using an interface which works like this > > to_string(T x); > to_string(T x, const locale& l); > // The following function always use the classic locale > // this allows easy specializations for trivial cases like int > to_string_classic(T x); > [...] What about converting to different string types, mainly std::string or std::wstring? I am also working on implementing to_string and string_to :). Maybe we could combine our efforts and get to_string/string_to into Boost. At the moment, my versions don't have locale support and string_to isn't returning optional<T>, although I am working on it. They can be used like this: print( boost::to_string< char >( 10 )); // returns std::string print( boost::to_string< char >( 10.01 )); print( boost::to_string< wchar_t >( 10 )); // returns std::wstring print( boost::to_string< wchar_t >( 10.01 )); and: print( boost::string_to< int >( "10" )); print( boost::string_to< float >( "10.01" )); to_string currently looks like this: #ifndef BOOST_CONVERSION_TO_STRING_HPP #define BOOST_CONVERSION_TO_STRING_HPP #include <sstream> #include <string> namespace boost { namespace detail { template< typename String > struct converter { typedef String type; }; template<> struct converter< char > { typedef std::string type; }; template<> struct converter< wchar_t > { typedef std::wstring type; }; } /** @brief Represent the contents of an object as a string. * * @param value The object value to convert to a string. * @return The string representation of that object. */ template< typename String, typename T > typename detail::converter< String >::type to_string( const T & value ) { typedef typename detail::converter< String >::type string_type; typedef typename string_type::value_type char_type; typedef typename string_type::traits_type char_traits; typedef typename string_type::allocator_type allocator_type; std::basic_ostringstream< char_type, char_traits, allocator_type > converter; converter << value; return converter.str(); } } #endif and is in a form I am reasonably happy with. The string_to implementation I am not yet happy with, but looks like this: #ifndef BOOST_CONVERSION_STRING_TO_HPP #define BOOST_CONVERSION_STRING_TO_HPP #include <sstream> #include <string> namespace boost { template< typename T, typename CharT, typename CharTraits, typename Allocator > T string_to( const std::basic_string< CharT, CharTraits, Allocator > & str ) { std::basic_istringstream< CharT, CharTraits, Allocator > converter( str ); T value; converter >> value; return value; } template< typename T > T string_to( const char * str ) { std::basic_istringstream< char > converter( str ); T value; converter >> value; return value; } template< typename T > T string_to( const wchar_t * str ) { std::basic_istringstream< wchar_t > converter( str ); T value; converter >> value; return value; } } #endif - Reece _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/

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[hash] Return type of fpclassify on gcc 4.0.1 on Darwin/OS X
by Daniel James 16 Apr '06

16 Apr '06

The hash floating point tests are failing on Darwin. Looking at the error (http://tinyurl.com/qoehb) it appears that when called with a long double, fpclassify is returning a value that isn't FP_ZERO, FP_INFINITE, FP_NAN, FP_NORMAL or FP_SUBNORMAL. But according to: http://developer.apple.com/documentation/Darwin/Reference/ManPages/man3/fpc… those are the only values that it can return. I've been reading up about OS X's long double implementation but can't find any mention of fpclassify. So maybe I just shouldn't use it on this platform. Please can someone with access to the platform look into this? Daniel

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Re: [boost] string_to/to_string (was: Re: Report from Berlin C++ Standards Committee meeting)
by Reece Dunn 16 Apr '06

16 Apr '06

Martin Adrian wrote: > Reece Dunn <msclrhd <at> hotmail.com> writes: > > > What about converting to different string types, mainly std::string or > std::wstring? > > I use to_string and to_wstring but both actually comes from basic_to_string > which is templated on StringT. > > In my own stream class I have implemented c_str() so basic_to_string looks > something like: > > template <typename StringT, typename T> > StringT basic_to_string(call_traits<T>::arg_type x) { > myostream<StringT::char_type> os; > os << x; > return StringT(os.c_str()); > } What if StringT doesn't have a char_type define (such as const wchar_t *)? What if you have something like basic_string< char, case_insensitive< char > >? Or define a different allocator? You could have: typedef typename traits::char_type< StringT >::type char_type; typedef typename traits::char_traits< StringT >::type char_traits; typedef typename traits::allocator_type< StringT >::type allocator; std::basic_ostringstream< char_type, char_traits, allocator > os; os << x; return StringT( os.str().c_str()); > template <typename T> > std::string to_string(const T& x) { return basic_to_string<std::string, T> > (x); } That is similar to what I initially came up with. > template <typename T, typename SequenceT> > T from_string(const SequenceT& seq) { > T v; > myistream<SequenceT::value_type> is(begin(seq), end(seq)); > is >> v; > if (istream_failed(is)) throw invalid_argument("from_string"); > return v; > } People in this discussion have expressed a dislike of throwing exceptions on conversion failure w.r.t. lexical_cast. We could have a string_to and try_string_to, where the try_ version returns T and throws, while the other returns optional<T> and doesn't throw. > > I am also working on implementing to_string and string_to :). Maybe we could > combine our efforts and get > > to_string/string_to into Boost. > > Sure. I can send you my code. Great! > > At the moment, my versions don't have locale support and string_to isn't > returning optional<T> > > I no fan of optional and prefer throw/default. I have not seen a situation > where optional would be easier to use but many where it would be more > difficult. I haven't looked into using optional as I am not familiar with the library. Therefore, I am not qualified to answer questions regarding its usefulness in this situation :). > locale support is a must for me since I want to use to_string both for user > messages (which uses global locale) and SQL statements (which uses classic + a > special date facet). Yeah. Others have requested this for lexical_cast. I was planning on adding versions which take a locale as a second parameter, but haven't gotten around to it yet. - Reece _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/

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Bug list status
by Marshall Clow 15 Apr '06

15 Apr '06

Low point: 54 bugs Two weeks ago: 62 bugs Last week: 60 bugs Today: 60 bugs Let's try to knock these bugs down for 1.34! Thanks in advance! If anyone would like to integrate the "Fixes for build on IBM pSeries for AIX and Linux" currently assigned to "Nobody", please let me know! If you think that a bug has been assigned incorrectly, please let me know. Bug counts per assignee: Doug Gregor 5 Roland Schwarz (speedsnail) 3 Stephen Cleary (shammah) 5 Jeremy Siek 5 Jeff Garland (az_sw_dude) 4 Joerg Walter 4 Eric Friedman (ebf) 3 Samuel Kremp 3 John R. Bandela 2 Marshall Clow 2 Joel de guzman (djowel) 2 John Maddock 1 Jens Maurer 2 Thorsten Ottosen (nesotto) 2 Vladimir Prus 2 Rene Rivera (grafik) 2 Jonathan Turkanis 2 Nobody 2 Beman Dawes 2 Peter Dimov 1 Mike Glassford 1 Aleskey Gurtovoy (agurtovoy) 1 Kevlin Henney 1 Hubert Holin 1 Jaakko Jurvi (urzuga) 1 Daniel Wallin 1 Here are the bugs, sorted by assignee: Assignee: agurtovoy <http://sourceforge.net/users/agurtovoy/> Summary: mpl::remove compile error with gcc 4.1.0 Bug #: 1453180 <http://sourceforge.net/tracker/index.php?func=detail&aid=1453180&group_id=7…> Assignee: az_sw_dude <http://sourceforge.net/users/az_sw_dude/> Summary: wrong usage of ios_base::narrow Bug #: 989487 <http://sourceforge.net/tracker/index.php?func=detail&aid=989487&group_id=75…> Assignee: az_sw_dude <http://sourceforge.net/users/az_sw_dude/> Summary: date_time type conversion warning Bug #: 1069225 <http://sourceforge.net/tracker/index.php?func=detail&aid=1069225&group_id=7…> Assignee: az_sw_dude <http://sourceforge.net/users/az_sw_dude/> Summary: local_adjustor::utc_to_local throws 'Time label invalid' Bug #: 1220011 <http://sourceforge.net/tracker/index.php?func=detail&aid=1220011&group_id=7…> Assignee: az_sw_dude <http://sourceforge.net/users/az_sw_dude/> Summary: bjam don`t copy lib & dll files to stage Bug #: 1402743 <http://sourceforge.net/tracker/index.php?func=detail&aid=1402743&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: linker error mingw 3.4.5 Bug #: 1426819 <http://sourceforge.net/tracker/index.php?func=detail&aid=1426819&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: VC8 can't find windows.h even though environment is correct! Bug #: 1468124 <http://sourceforge.net/tracker/index.php?func=detail&aid=1468124&group_id=7…> Assignee: daniel_wallin <http://sourceforge.net/users/daniel_wallin/> Summary: [Parameter] Docco error section 2.7.2 Bug #: 1378446 <http://sourceforge.net/tracker/index.php?func=detail&aid=1378446&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: LEDA graph adaptors do not handle hidden nodes properly Bug #: 1168431 <http://sourceforge.net/tracker/index.php?func=detail&aid=1168431&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: random_vertex/random_edge are unnecessarily inefficient Bug #: 1204684 <http://sourceforge.net/tracker/index.php?func=detail&aid=1204684&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: Document copy_component Bug #: 1204688 <http://sourceforge.net/tracker/index.php?func=detail&aid=1204688&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: reverse_graph and constness of property maps Bug #: 1246336 <http://sourceforge.net/tracker/index.php?func=detail&aid=1246336&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: Bundled graph properties Bug #: 1420498 <http://sourceforge.net/tracker/index.php?func=detail&aid=1420498&group_id=7…> Assignee: djowel <http://sourceforge.net/users/djowel/> Summary: Miss ' = ParserT()' Bug #: 907299 <http://sourceforge.net/tracker/index.php?func=detail&aid=907299&group_id=75…> Assignee: djowel <http://sourceforge.net/users/djowel/> Summary: spirit insert_key_actor.hpp Bug #: 1059936 <http://sourceforge.net/tracker/index.php?func=detail&aid=1059936&group_id=7…> Assignee: ebf <http://sourceforge.net/users/ebf/> Summary: boost::blank - missing operators Bug #: 1191356 <http://sourceforge.net/tracker/index.php?func=detail&aid=1191356&group_id=7…> Assignee: ebf <http://sourceforge.net/users/ebf/> Summary: [variant] Bug in recursive_wrapper_fwd.hpp Bug #: 1359257 <http://sourceforge.net/tracker/index.php?func=detail&aid=1359257&group_id=7…> Assignee: ebf <http://sourceforge.net/users/ebf/> Summary: ambiguous overloads in boost::variant source code Bug #: 1456780 <http://sourceforge.net/tracker/index.php?func=detail&aid=1456780&group_id=7…> Assignee: glassfordm <http://sourceforge.net/users/glassfordm/> Summary: condition::timed_wait doesnt take amount of time to wait Bug #: 1468789 <http://sourceforge.net/tracker/index.php?func=detail&aid=1468789&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: boost jam problem with parallel builds Bug #: 1234224 <http://sourceforge.net/tracker/index.php?func=detail&aid=1234224&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: boost.build needs fixes for HP/UX Bug #: 1395924 <http://sourceforge.net/tracker/index.php?func=detail&aid=1395924&group_id=7…> Assignee: hubert_holin <http://sourceforge.net/users/hubert_holin/> Summary: Cannot compile octonion_test.cpp because of bug in sinc.hpp Bug #: 751289 <http://sourceforge.net/tracker/index.php?func=detail&aid=751289&group_id=75…> Assignee: jbandela <http://sourceforge.net/users/jbandela/> Summary: Compiler error for tokenizer on Solaris Bug #: 976241 <http://sourceforge.net/tracker/index.php?func=detail&aid=976241&group_id=75…> Assignee: jbandela <http://sourceforge.net/users/jbandela/> Summary: token_iterator::at_end() result is inversed Bug #: 1338326 <http://sourceforge.net/tracker/index.php?func=detail&aid=1338326&group_id=7…> Assignee: jmaurer <http://sourceforge.net/users/jmaurer/> Summary: Diff in state of mersenne_twister gen between GCC3.41 & CW9 Bug #: 1115124 <http://sourceforge.net/tracker/index.php?func=detail&aid=1115124&group_id=7…> Assignee: jmaurer <http://sourceforge.net/users/jmaurer/> Summary: uniform_01 copies engine instead of using a reference Bug #: 1464566 <http://sourceforge.net/tracker/index.php?func=detail&aid=1464566&group_id=7…> Assignee: joerg_walter <http://sourceforge.net/users/joerg_walter/> Summary: bug in ublas/storage.hpp Bug #: 1095697 <http://sourceforge.net/tracker/index.php?func=detail&aid=1095697&group_id=7…> Assignee: joerg_walter <http://sourceforge.net/users/joerg_walter/> Summary: dead links in uBLAS page Bug #: 1169273 <http://sourceforge.net/tracker/index.php?func=detail&aid=1169273&group_id=7…> Assignee: joerg_walter <http://sourceforge.net/users/joerg_walter/> Summary: Documentation not available on web site: Bug #: 1228242 <http://sourceforge.net/tracker/index.php?func=detail&aid=1228242&group_id=7…> Assignee: joerg_walter <http://sourceforge.net/users/joerg_walter/> Summary: uBLAS::subslice doesn't work Bug #: 1292635 <http://sourceforge.net/tracker/index.php?func=detail&aid=1292635&group_id=7…> Assignee: johnmaddock <http://sourceforge.net/users/johnmaddock/> Summary: Adding boost::is_complex to type_traits.hpp Bug #: 1315712 <http://sourceforge.net/tracker/index.php?func=detail&aid=1315712&group_id=7…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: invalid result for File Dependency Examp Bug #: 551110 <http://sourceforge.net/tracker/index.php?func=detail&aid=551110&group_id=75…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: Spelling of Edmonds-Karp-Algorithm Bug #: 1226292 <http://sourceforge.net/tracker/index.php?func=detail&aid=1226292&group_id=7…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: g++ v3.2.3 inker error for read_graphviz ih boost v1.33.1 Bug #: 1378907 <http://sourceforge.net/tracker/index.php?func=detail&aid=1378907&group_id=7…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: Calling subgraph::global_to_local on a root graph Bug #: 1444271 <http://sourceforge.net/tracker/index.php?func=detail&aid=1444271&group_id=7…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: Calling subgraph::global_to_local on a root graph Bug #: 1444293 <http://sourceforge.net/tracker/index.php?func=detail&aid=1444293&group_id=7…> Assignee: kevlin <http://sourceforge.net/users/kevlin/> Summary: lexical_cast & pure virtual functions & VC 8 STL Bug #: 1358600 <http://sourceforge.net/tracker/index.php?func=detail&aid=1358600&group_id=7…> Assignee: mclow <http://sourceforge.net/users/mclow/> Summary: Solaris - once.cpp compile error Bug #: 549162 <http://sourceforge.net/tracker/index.php?func=detail&aid=549162&group_id=75…> Assignee: mclow <http://sourceforge.net/users/mclow/> Summary: mistake in documentation of condition Bug #: 1364416 <http://sourceforge.net/tracker/index.php?func=detail&aid=1364416&group_id=7…> Assignee: nesotto <http://sourceforge.net/users/nesotto/> Summary: boost.range and 'const char[]'. Bug #: 1272315 <http://sourceforge.net/tracker/index.php?func=detail&aid=1272315&group_id=7…> Assignee: nesotto <http://sourceforge.net/users/nesotto/> Summary: [Boost.Range]boost::const_begin calls non-qualified 'begin' Bug #: 1361686 <http://sourceforge.net/tracker/index.php?func=detail&aid=1361686&group_id=7…> Assignee: nobody Summary: Fixes for build on IBM pSeries for AIX and Linux Bug #: 1446471 <http://sourceforge.net/tracker/index.php?func=detail&aid=1446471&group_id=7…> Assignee: nobody Summary: Non-basic-source-character-set characters conflict with MSVC Bug #: 1461533 <http://sourceforge.net/tracker/index.php?func=detail&aid=1461533&group_id=7…> Assignee: pdimov <http://sourceforge.net/users/pdimov/> Summary: shared_ptr<> causes memory leacks and crash Bug #: 1457205 <http://sourceforge.net/tracker/index.php?func=detail&aid=1457205&group_id=7…> Assignee: samuel_k <http://sourceforge.net/users/samuel_k/> Summary: format: assert when parsing invalid pattern Bug #: 1326132 <http://sourceforge.net/tracker/index.php?func=detail&aid=1326132&group_id=7…> Assignee: samuel_k <http://sourceforge.net/users/samuel_k/> Summary: boost::format parse method doesn't work Bug #: 1439607 <http://sourceforge.net/tracker/index.php?func=detail&aid=1439607&group_id=7…> Assignee: samuel_k <http://sourceforge.net/users/samuel_k/> Summary: 64 bit compile warning/error for boost::format Bug #: 1451470 <http://sourceforge.net/tracker/index.php?func=detail&aid=1451470&group_id=7…> Assignee: shammah <http://sourceforge.net/users/shammah/> Summary: ct_gcd_lcm.hpp compilation error Bug #: 558174 <http://sourceforge.net/tracker/index.php?func=detail&aid=558174&group_id=75…> Assignee: shammah <http://sourceforge.net/users/shammah/> Summary: pool::purge_memory() does not reset next_size Bug #: 984124 <http://sourceforge.net/tracker/index.php?func=detail&aid=984124&group_id=75…> Assignee: shammah <http://sourceforge.net/users/shammah/> Summary: Borland compiler error with Pool, boost::pool_allocator Bug #: 988124 <http://sourceforge.net/tracker/index.php?func=detail&aid=988124&group_id=75…> Assignee: shammah <http://sourceforge.net/users/shammah/> Summary: perfomance: memory cleanup for pool takes too long Bug #: 995270 <http://sourceforge.net/tracker/index.php?func=detail&aid=995270&group_id=75…> Assignee: shammah <http://sourceforge.net/users/shammah/> Summary: boost::pool_allocator breaks with vector of vectors Bug #: 1179641 <http://sourceforge.net/tracker/index.php?func=detail&aid=1179641&group_id=7…> Assignee: speedsnail <http://sourceforge.net/users/speedsnail/> Summary: BCB6 throw EExternelException Bug #: 596149 <http://sourceforge.net/tracker/index.php?func=detail&aid=596149&group_id=75…> Assignee: speedsnail <http://sourceforge.net/users/speedsnail/> Summary: Exception safety in class \'thread\' Bug #: 1305885 <http://sourceforge.net/tracker/index.php?func=detail&aid=1305885&group_id=7…> Assignee: speedsnail <http://sourceforge.net/users/speedsnail/> Summary: Memory leak in tss Bug #: 1424965 <http://sourceforge.net/tracker/index.php?func=detail&aid=1424965&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: rational operator&lt; can overflow Bug #: 798357 <http://sourceforge.net/tracker/index.php?func=detail&aid=798357&group_id=75…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: problem with boost::iostreams when compiled with Visual C++ Bug #: 1365752 <http://sourceforge.net/tracker/index.php?func=detail&aid=1365752&group_id=7…> Assignee: urzuga <http://sourceforge.net/users/urzuga/> Summary: [boost::lambda] Compile error with libstdc++ debug mode Bug #: 1444052 <http://sourceforge.net/tracker/index.php?func=detail&aid=1444052&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: multitoken broken in program_options 1.33 Bug #: 1266877 <http://sourceforge.net/tracker/index.php?func=detail&aid=1266877&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: program_options: additional parser bug Bug #: 1433424 <http://sourceforge.net/tracker/index.php?func=detail&aid=1433424&group_id=7…> -- -- Marshall Marshall Clow Idio Software <mailto:marshall@idio.com> It is by caffeine alone I set my mind in motion. It is by the beans of Java that thoughts acquire speed, the hands acquire shaking, the shaking becomes a warning. It is by caffeine alone I set my mind in motion.

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[Boost-bugs] [ boost-Bugs-1471025 ] from_ftime incorrectly processes FILETIME filled with zeros
by SourceForge.net 15 Apr '06

15 Apr '06

Bugs item #1471025, was opened at 2006-04-15 14:15 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1471025&group_… Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: date_time Group: None Status: Open Resolution: None Priority: 5 Submitted By: Nobody/Anonymous (nobody) Assigned to: Jeff Garland (az_sw_dude) Summary: from_ftime incorrectly processes FILETIME filled with zeros Initial Comment: using namespace boost::posix_time; using namespace boost::gregorian; FILETIME ft; ZeroMemory( &ft, sizeof( ft ) ); ptime pt = from_ftime<ptime>( ft ); if ( pt.is_special() ) { // Never fall into this branch! std::cout << "ERROR"; } else { // Exception: boost::gregorian::bad_year std::cout << boost::format("%1%") % pt.date().year(); } I suppose that when FILETIME is filled with zeroes, from_ftime() should return not_a_date_time. But it does not do this. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1471025&group_… ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ Boost-bugs mailing list Boost-bugs(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/boost-bugs

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Patches status
by Marshall Clow 15 Apr '06

15 Apr '06

These are the submitted patches that are waiting to be integrated/rejected/whatever. Thanks to everyone who has helped! As always, if you see one that is mis-assigned, or you think that one marked "nobody" is right for you, please don't hesitate to jump in. ;-) Thank you for your cooperation! Patches per assignee: Jonathan Turkanis 4 David Abrahams 1 Ronald Garcia 1 Robert Ramey 1 Roland Schwartz 1 Here are the currently submitted patches, sorted by assignee. Assignee: david_abrahams <http://sourceforge.net/users/david_abrahams/> Summary: Explicitly delete registered converter chains Bug #: 1464421 <http://sourceforge.net/tracker/index.php?func=detail&aid=1464421&group_id=7…> Assignee: ramey <http://sourceforge.net/users/ramey/> Summary: Boost.Serialization for std::bitset Bug #: 1029258 <http://sourceforge.net/tracker/index.php?func=detail&aid=1029258&group_id=7…> Assignee: rgarcia <http://sourceforge.net/users/rgarcia/> Summary: [concept_check.hpp] remove unused variable warning in msvc Bug #: 1388901 <http://sourceforge.net/tracker/index.php?func=detail&aid=1388901&group_id=7…> Assignee: speedsnail <http://sourceforge.net/users/speedsnail/> Summary: [thread] [tss_hook.cpp] Suppress MSVC CRT memory leak report Bug #: 1430820 <http://sourceforge.net/tracker/index.php?func=detail&aid=1430820&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: rational::operator< fails for unsigned value types Bug #: 1434821 <http://sourceforge.net/tracker/index.php?func=detail&aid=1434821&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: rational.hpp::gcd returns a negative value sometimes Bug #: 1438626 <http://sourceforge.net/tracker/index.php?func=detail&aid=1438626&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: rational::operator<(rational) fails due to overflow Bug #: 1438991 <http://sourceforge.net/tracker/index.php?func=detail&aid=1438991&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: iostreams // file_descriptor::seek BUG on files > 4 GB Bug #: 1452698 <http://sourceforge.net/tracker/index.php?func=detail&aid=1452698&group_id=7…> -- -- Marshall Marshall Clow Idio Software <mailto:marshall@idio.com> It is by caffeine alone I set my mind in motion. It is by the beans of Java that thoughts acquire speed, the hands acquire shaking, the shaking becomes a warning. It is by caffeine alone I set my mind in motion.

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status of fibonnaci_heap and mutable_queue
by Fernando Cacciola 15 Apr '06

15 Apr '06

Does anyone know the satus of these pending libraries? I'm in need of a mutable priority queue. TIA Fernando Cacciola

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[Filesystem] Querying a card reader can throw on Windows
by Angus Leeming 14 Apr '06

14 Apr '06

Hi, Beman. If I understand correctly, the idiom to check whether a directory exists using Boost.Filesystem is if (fs::exists(path) && fs::is_directory(path)) Under normal conditions the code above shouldn't throw, right? One of our users reports that this code does, however, throw when it is used on Windows to query a card reader that has a drive letter J: assigned to it. Below is a diagnostic program that attempts to query a nonexistent "J:\foo". Executing it, our user finds: 1. If no drive is associated with J: then the program outputs nothing. 2. If an empty drive is associated with J: Exception caught: boost::filesystem::is_directory: "J:\foo": The device is not ready. Assertion failed: false file ekkehart.cpp, line 40 3. If the drive contains a disk the program outputs nothing. He goes on to say: The problem described disappears if I do one of the following: 1. Reassign another letter to the smart cars slot (such that J: is not assigned to any drive) 2. Reassign J: to a used slot (in my case the compact flash slot) and insert a card. 3. Remove the card reader. Conclusion: You should have either no drive assigned to J: or a drive with an inserted medium. This is with the current release of Boost, 1.33.1. Is this a known problem (is there a workaround) or have we stumbled upon a bug? Kind regards, Angus /* Compiled with g++ -fno-exceptions -Iboost -o ekkehart ekkehart.cpp \ -Lbuild/boost/libs/filesystem/src/.libs -lboost_filesystem */ #include <boost/filesystem/operations.hpp> #include <boost/filesystem/path.hpp> #include <cassert> #include <cstdlib> #include <exception> #include <iostream> namespace fs = boost::filesystem; int main() { fs::path const path("J:/foo", fs::no_check); if (fs::exists(path) && fs::is_directory(path)) std::cout << path.native_directory_string() << "is a directory" << std::endl; return 0; } namespace boost { void throw_exception(std::exception const & e) { std::cerr << "Exception caught:\n" << e.what() << std::endl; assert(false); } void assertion_failed(char const * expr, char const * function, char const * file, long line) { std::cerr << "Assertion triggered in " << function << " by failing check \"" << expr << "\"" << " in file " << file << ":" << line << std::endl; ::abort(); } } // namespace boost

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[parameter] Lack of safety?
by Fred Bertsch 14 Apr '06

14 Apr '06

There are cases where boost::parameter can translate its arguments to the wrong arguments at the function implementation side. I'm hoping that I'm doing something wrong, but it seems like a problem with the parameter library. The parameter library suggests creating global variables named with the names of the arguments to your function. If you have an inner scope at the calling site with a variable with the same name, things don't work. I'm okay if this simply results in a compiler error, but in some fairly simple cases, it can correctly compile to the wrong call to the implemented function. Here's an example: void FooImpl( int x, int y ) { // Gets x = 8, y = 14. We wanted x = 12, y = 8. } BOOST_PARAMETER_KEYWORD( tags, x ) BOOST_PARAMETER_KEYWORD( tags, y ) typedef boost::parameter::parameters< tags::x, tags::y > FooParams; template< typename ArgumentPack > void FooImpl( ArgumentPack const& args ) { typename boost::parameter::binding< ArgumentPack, tags::x, int >::type xx = args[ x | 12 ]; typename boost::parameter::binding< ArgumentPack, tags::y, int >::type yy = args[ y | 14 ]; FooImpl( xx, yy ); } // Some overloads are left out. This shouldn't matter. template< typename T0 > void Foo( T0 const& a0 ) { FooImpl( FooParams()( a0 ) ); } void Bar( int y ) { ... Foo( y = 8 ); ... } Notice that Bar has an argument with the same name as one of the global variables declared with BOOST_PARAMETER_KEYWORD. I can't think of a general solution to this problem. It might be better to use the call syntax "Foo( y( 8 ) );" instead because overloaded function call operators are less common than assignment operators. This does not remove the danger, however; it only disguises it better. Another solution might be to put all of the global variables in their own named namespace so that one has to qualify their use. E.g.: "Foo( arg::y = 8 );". Some other naming convention might also mitigate the problem. Note that my example looks fairly artificial because I've simplified it so much, but it's not as unlikely as it looks. The global variable is called something that meaningfully describes the argument. It is not so unlikely for a caller to have a variable with the same purpose in the context of the call, and it is not unlikely for that to have the same name. Hopefully I'm missing something important here. Please correct my misunderstanding if that's true. -Fred Bertsch

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[review] Review Manager Needed
by Ronald Garcia 14 Apr '06

14 Apr '06

Hi all, Of the current set of libraries in the review queue, only one lacks a review manager. It would be great if some boost veteran stepped up and took on this role for the following library: Pimpl Pointer ------------- :Author: Asger Mangaard :Review Manager: Need Volunteer :Download: Boost Sandbox (http://boost-consulting.com/vault/) under pimpl_ptr. :Description: The pimpl idiom is widely used to reduce compile times and disable code coupling. It does so by moving private parts of a class from the .hpp file to the .cpp file. However, it's implementation can be tricky, and with many pitfalls (especially regarding memory management). The pimpl_ptr library is a single header file, implementing a special policy based smart pointer to greately ease the implementation of the pimpl idiom. Thank you, Ron Garcia Boost Review Co-Wizard

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