February 2004 - Boost - lists.preview.boost.org

problems with binary variant visitors in 1.31
by E. Gladyshev 06 Feb '04

06 Feb '04

Great job with the 1.31 release! Just wondering if anybody else observerved this kind of problems before. When compiling the code below with MSVC 7.1, I am getting this error: test.cpp(123) : error C2039: 'set' : is not a member of 'my_type::test1'. GCC 3.2.3 gives a compilation error as well. template< typename T > struct binary_variant_visitor : public ::boost::static_visitor<> { T& obj_; binary_variant_visitor( T& obj ) : obj_(obj) {} template< typename VT1, typename VT2 > void operator()( VT1& v1, VT2& v2 ) { obj_.visit( v1, v2 ); } }; struct my_type { struct test1 { test1(); ~test1(); }; struct test2 { ~test2(); template< typename T > void set( T& ); }; typedef ::boost::variant<test1,test2> var; var d_; template< typename U > void visit( test1& t, U& u ) //test1 doesn't have set() { } template< typename T, typename U > void visit( T& t, U& u ) { t.set(u); } const var& data() const { return d_; } }; main() { my_type t1, t2; binary_variant_visitor<my_type> v(t1); ::boost::apply_visitor(v, t1.data(), t2.data() ); } If I change the last line to ::boost::apply_visitor(v, t1.d_, t2.d_ ); it works fine on both compilers. I guess it has something to do with how apply_visitor derives the parameter types. Eugene __________________________________ Do you Yahoo!? Yahoo! Finance: Get your refund fast by filing online. http://taxes.yahoo.com/filing.html

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Re: problems with binary variant visitors in 1.31
by E. Gladyshev 06 Feb '04

06 Feb '04

Never mind. Sorry I didn't notice 'const' in data(). Everything is pefect now. Eugene --- "E. Gladyshev" <egladysh(a)yahoo.com> wrote: > Great job with the 1.31 release! > > Just wondering if anybody else observerved this kind of problems before. > When compiling the code below with MSVC 7.1, I am getting this error: > test.cpp(123) : error C2039: 'set' : is not a member of 'my_type::test1'. > GCC 3.2.3 gives a compilation error as well. > > template< typename T > > struct binary_variant_visitor : public ::boost::static_visitor<> > { > T& obj_; > > binary_variant_visitor( T& obj ) : obj_(obj) {} > > template< typename VT1, typename VT2 > > void operator()( VT1& v1, VT2& v2 ) > { > obj_.visit( v1, v2 ); > } > }; > > struct my_type > { > struct test1 > { > test1(); > ~test1(); > }; > struct test2 > { > ~test2(); > template< typename T > > void set( T& ); > }; > > typedef ::boost::variant<test1,test2> var; > > var d_; > > template< typename U > > void visit( test1& t, U& u ) //test1 doesn't have set() > { > } > > template< typename T, typename U > > void visit( T& t, U& u ) > { > t.set(u); > } > > const var& data() const { return d_; } > }; > > main() > { > my_type t1, t2; > > binary_variant_visitor<my_type> v(t1); > ::boost::apply_visitor(v, t1.data(), t2.data() ); > } > > If I change the last line to > ::boost::apply_visitor(v, t1.d_, t2.d_ ); > > it works fine on both compilers. > I guess it has something to do with how > apply_visitor derives the parameter types. > > Eugene > > > __________________________________ > Do you Yahoo!? > Yahoo! Finance: Get your refund fast by filing online. > http://taxes.yahoo.com/filing.html > __________________________________ Do you Yahoo!? Yahoo! Finance: Get your refund fast by filing online. http://taxes.yahoo.com/filing.html

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[Boost-bugs] [ boost-Bugs-891611 ] mpl::less<> doesn't compile
by SourceForge.net 06 Feb '04

06 Feb '04

Bugs item #891611, was opened at 2004-02-05 23:30 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=891611&group_i… Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Eugene (egladysh) Assigned to: Nobody/Anonymous (nobody) Summary: mpl::less<> doesn't compile Initial Comment: First of all, congratulations with v1.31! I am having a weird problem when compiling mpl/less.hpp in MSVC 7.1 The error message is: s:\boost\boost_1_31_0\boost\mpl\less.hpp(39) : error C2760: syntax error : expected ',' not ';' s:\boost\boost_1_31_0\boost\mpl\less.hpp(51) : see reference to class template instantiation 'boost::mpl::less<T1,T2>' being compiled s:\boost\boost_1_31_0\boost\mpl\less.hpp(39) : error C2144: syntax error : 'const bool' should be preceded by '}' s:\boost\boost_1_31_0\boost\mpl\less.hpp(39) : error C2062: type 'const bool' unexpected s:\boost\boost_1_31_0\boost\mpl\less.hpp(39) : error C2238: unexpected token(s) preceding ';' s:\boost\boost_1_31_0\boost\mpl\less.hpp(42) : error C2065: 'value' : undeclared identifier s:\Projects\notus\notus\libs\src\platform\win32 \notus_traits\winobj.cpp(150) : fatal error C1903: unable to recover from previous error(s); stopping compilation ***************** If I change enum { msvc71_wknd_ = ( BOOST_MPL_AUX_VALUE_WKND (T1)::value < BOOST_MPL_AUX_VALUE_WKND (T2)::value ) }; to enum { msvc71_wknd_ = BOOST_MPL_AUX_VALUE_WKND (T1)::value < BOOST_MPL_AUX_VALUE_WKND (T2)::value }; everything works. Somehow the parentheses break the compiler. Eugene ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=107586&aid=891611&group_i… ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn _______________________________________________ Boost-bugs mailing list Boost-bugs(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/boost-bugs

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using lexical_cast with tuples.
by David Sankel 06 Feb '04

06 Feb '04

Hello, I'm guessing this has something to do with the unsetf(std::ios::skipws) call. Anyway, the following code seems contradictory since it's output is "Exception Thrown". Has anyone else come across this? #include <iostream> #include <boost/tuple/tuple.hpp> #include <boost/tuple/tuple_io.hpp> #include <boost/lexical_cast.hpp> int main() { boost::tuple<float,float> aTuple(2.2f,3.3f); std::string theString = boost::lexical_cast<std::string>(aTuple); try { boost::tuple<float,float> i = boost::lexical_cast<boost::tuple<float,float> > ( theString ); } catch(...) { std::cout << "Exception Thrown" << std::endl; } } Thanks, David J. Sankel

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[Boost-bugs] [ boost-Bugs-891530 ] Documentation pointing to .htmfiles (not .html)
by SourceForge.net 06 Feb '04

06 Feb '04

Bugs item #891530, was opened at 2004-02-05 22:58 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=891530&group_i… Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: gregg conklin (gconklin) Assigned to: Nobody/Anonymous (nobody) Summary: Documentation pointing to .htm files (not .html) Initial Comment: At least a few places in the html docs point to .htm files such as items in "Libraries Listed Alphabetically" and "Libraries Listed by Categories" examples: Regex - points to libs/regex/index.htm Smart Pointer - points to libs/smart_ptr/index.htm but the file on disk is actually: Regex - libs/regex/index.html Smart Pointer - libs/smart_ptr/index.html ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=107586&aid=891530&group_i… ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn _______________________________________________ Boost-bugs mailing list Boost-bugs(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/boost-bugs

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[BGL] Using undirected adjacency_matrix.
by Cromwell Enage 05 Feb '04

05 Feb '04

Morning, all. When the attached source code is compiled as is, the program works as expected. If the first #if condition is set to 0, the program garbles some output before crashing. If second #if condition is then set to 1, the program outputs much less, but it still crashes. Without the undirectedS property tag, the program works as expected, regardless of the #if conditions. I'm using the MinGW compiler bundled with Dev-C++ 4.9.8.5 and linking to the Boost libraries downloaded from CVS as of today, 0830 EST. I don't use the adjacency_matrix class template except for testing, so this is no showstopper, but it does seem to put a crimp on genericity. Feedback appreciated! Cromwell Enage __________________________________ Do you Yahoo!? Yahoo! Finance: Get your refund fast by filing online. http://taxes.yahoo.com/filing.html

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Boost suugestion
by Mohammed 05 Feb '04

05 Feb '04

Hi... I am facing a problem with Boost. It is not a big problem but takes a long time to do. I use more than one library from Boost. I need to create a text file that contains all the Boost libraries header files paths. Adding these paths everytime I compile with gcc is time consuming. I am working on Windows XP and Boost library 1.30.0 is installed on drive C:. Mohammed

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[Boost-bugs] [ boost-Bugs-891277 ] Graph Header Clashes With Format Header
by SourceForge.net 05 Feb '04

05 Feb '04

Bugs item #891277, was opened at 2004-02-05 19:38 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=891277&group_i… Category: graph Group: None Status: Open Resolution: None Priority: 5 Submitted By: Gordon Smith (schmoo2k) Assigned to: Jeremy Siek (jsiek) Summary: Graph Header Clashes With Format Header Initial Comment: The following code produces many errors in MSVC71 #include <boost/format.hpp> #include <boost/graph/adjacency_list.hpp> int _tmain(int argc, _TCHAR* argv[]) { std::string s = (boost::format("%1% %2% % 3%") % "a" % "b" % "c").str(); return 0; } ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=107586&aid=891277&group_i… ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn _______________________________________________ Boost-bugs mailing list Boost-bugs(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/boost-bugs

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Relational Template Library -- incorrect link
by Arkadiy Vertleyb 05 Feb '04

05 Feb '04

Sorry, I provided an incorrect link to the library. The correct one is: http://groups.yahoo.com/group/boost/files/tables.zip Arkadiy _________________________________________________________________ What are the 5 hot job markets for 2004? Click here to find out. http://msn.careerbuilder.com/Custom/MSN/CareerAdvice/WPI_WhereWillWeFindJob…

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Three cheers for Beman (was Re: [Boost-users] Boost release 1.31.0is available)
by Jeremy Siek 05 Feb '04

05 Feb '04

On Feb 5, 2004, at 9:44 AM, Jeff Garland wrote: > On Thu, 05 Feb 2004 09:12:06 -0500, Beman Dawes wrote > >> Thanks to everyone who helped with this release. The folks that run >> the >> regression tests and review the release candidates get a special pat >> on the back. > > I think you (Beman) deserve an extra huge thanks for coordinating this > whole > thing -- it isn't easy! I second that. Three cheers for Beman! -Jeremy _______________________________________________ Jeremy Siek <jsiek(a)osl.iu.edu> http://www.osl.iu.edu.edu/~jsiek Ph.D. Student, Indiana University Bloomington C++ Booster (http://www.boost.org) Office phone: (812) 856-1820 _______________________________________________

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