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Error Linking A Simple Application using Boost.Any
by Dinesh Pillay 08 Jun '05

08 Jun '05

Hello all, I'm really new to boost and I tried compiling and then linking the following program : #include <iostream> #include <boost/any.hpp> int main() { boost::any a = 8; int var = boost::any_cast<int>(a); std::cout << var << std::endl; system("pause"); return 0; } I am able to compile the file with the command: >g++ -IC:\Boost\include\boost-1_32 -pedantic -s -O3 -fno-exceptions -c boost_trial.cpp -o boost_trial.o But when I try to link the file using: g++ -IC:\Boost\include\boost-1_32 boost_trial.cpp -o boost_trial.exe I get the following errors: /mingw/lib/libstdc++.a(eh_personality.o)(.data$_ZTISt9exception[typeinfo for std::exception]+0x0): multiple definition of `typeinfo for std::exception' C:\DOCUME~1\dpilla\LOCALS~1\Temp/ccoBaaaa.o(.rdata$_ZTISt9exception[typeinfo for std::exception]+0x0):boost_trial.cpp: first defined here /mingw/lib/libstdc++.a(eh_personality.o)(.text$_ZTSSt9exception[typeinfo name for std::exception]+0x0): multiple definition of `typeinfo name for std::exception' C:\DOCUME~1\dpilla\LOCALS~1\Temp/ccoBaaaa.o(.rdata$_ZTSSt9exception[typeinfo name for std::exception]+0x0):boost_trial.cpp: first defined here /mingw/lib/libstdc++.a(functexcept.o)(.data$_ZTISt8bad_cast[typeinfo for std::bad_cast]+0x0): multiple definition of `typeinfo for std::bad_cast' C:\DOCUME~1\dpilla\LOCALS~1\Temp/ccoBaaaa.o(.rdata$_ZTISt8bad_cast[typeinfo for std::bad_cast]+0x0):boost_trial.cpp: first defined here /mingw/lib/libstdc++.a(functexcept.o)(.text$_ZTSSt8bad_cast[typeinfo name for std::bad_cast]+0x0): multiple definition of `typeinfo name for std::bad_cast' C:\DOCUME~1\dpilla\LOCALS~1\Temp/ccoBaaaa.o(.rdata$_ZTSSt8bad_cast[typeinfo name for std::bad_cast]+0x0):boost_trial.cpp: first defined here collect2: ld returned 1 exit status I have no idea why this is happening! What am I doing wrong? Somebody please tell me the right way to link the file. Thanks a million. Regards, Dinesh Pillay. -- - Perfection or Nothing.

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Re: [Boost-users] Boost.Serialization 1.32 trouble reading back anobject first serialized in an std::vector then by pointer
by JOAQUIN LOPEZ MU?Z 08 Jun '05

08 Jun '05

----- Mensaje original ----- De: James Conrad <james(a)jamesconrad.org> Fecha: Miércoles, Junio 8, 2005 2:23 am Asunto: [Boost-users] Boost.Serialization 1.32 trouble reading back an object first serialized in an std::vector then by pointer > I'm evaluating the Boost.Serialization for use internal use as an > interchange format between a number of loose knit projects, and > I've run > into a bit of trouble. > > I'm using Vc 7.1 in Visual Studio .NET 2003. > > It seems to me that, if I serialize an object first in an std::vector, > and then serialize it later by pointer, that there is trouble > reading it > back. > [...] I think you've hit a problem which was discussed some months ago: http://thread.gmane.org/gmane.comp.lib.boost.devel/114537 If this is the same issue, you'll be happy to know that the problem has been solved in the Boost 1.33 version of Boost.Serialization; you might want to download the latest CVS and give your code a try. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo

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Mailing list outage
by David Abrahams 08 Jun '05

08 Jun '05

-- Dave Abrahams Boost Consulting www.boost-consulting.com

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Exception from regexp timer test
by Jeff 08 Jun '05

08 Jun '05

I didn't see this in the reported bugs so I'm not sure whether its a known problem or not. C:\boost\>timer Enter expression (or "quit" to exit): ([[:digit:]]{1,}|[[:space:]]{1,}){1,}[[:alpha:]]{1,} Enter string to search (or "quit" to exit): 22222222222222222222 abnormal program termination ---- Built with MS VC++ 6.0 on a x86 (Pentium M, Family 6, Model 9 running WinXP SP2. C:\> cl Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86 Copyright (C) Microsoft Corp 1984-1998. All rights reserved. Boost.regexp and the examples were built from boost_1_32_0.zip using vc6.mak.

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[boost][tokenizer] std::wstring question
by David Klein 08 Jun '05

08 Jun '05

hi, Is there a reason why the template params for the tokenizer class are std::string? This makes it "harder" to use it with std::wstring. You have to write: tokenizer<char_separator<wchar_t>, std::wstring::const_iterator, std::wstring> tkz; ... Instead of: tokenizer<char_separator<wchar_t> > tkz; ... (i guess i'm very lazy ;) I changed the scope of the string_type typedef for the xxx_separator classes to public, and used this typedef in the tokenizer template params. Now std::wstring works like std::string for me. *** token_functions.hpp *** class char_separator/char_delimiters_separator/... { public: typedef std::basic_string<Char,Traits> string_type; ... }; *** tokenizer.hpp *** template < typename TokenizerFunc = char_delimiters_separator<char>, typename Iterator = /*std::string::const_iterator*/ TokenizerFunc::string_type::const_iterator, typename Type = /*std::string*/ TokenizerFunc::string_type > class tokenizer {...}; regards /dave

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Boost Test - catching assertions, marking them as a success?
by Kevin Wheatley 08 Jun '05

08 Jun '05

Hi, I'm looking at using Boost Test as a means to carry out unit tests and wondered if there is a guard for assertions like there is for exception handling to say, "this test should assert()", fail if it does not. This would be really handy, especially if it was available in the Auto unit tests: BOOST_AUTO_UNIT_TEST_SHOULD_ASSERT( object_calls_assert ) { myobject foo; foo.callAssert(); } or something similar. Kevin -- | Kevin Wheatley, Cinesite (Europe) Ltd | Nobody thinks this | | Senior Technology | My employer for certain | | And Network Systems Architect | Not even myself |

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RE: [Boost-users] Problem with boost::signal. How to call just one slotin signal
by Brian Braatz 08 Jun '05

08 Jun '05

Forgive me. I reviewed your code- but I am having a hard time totally seeing what you are trying to do (by the code alone). Allow me to offer a suggestion from what I understand of your description of the problem: 1- For your special callback, save it off somewhere as a boost.function<> 2- then call the boost.function<> you have saved before calling your signals It is not clear to me if you want the "special" callback to also be in the signal. If so, you can add it (and the above still works) Hope that helps Brian > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org [mailto:boost-users- > bounces(a)lists.boost.org] On Behalf Of Juho Mäkinen > Sent: Monday, June 06, 2005 11:56 PM > To: boost-users(a)lists.boost.org > Subject: [Boost-users] Problem with boost::signal. How to call just one > slotin signal > > Hello. > > I'm having problems with boost::signal. I have a simple callback > system: > > typedef boost::signal<void (const String &)> StringCallbacks; > TSharedPtr<StringCallbacks> stringCallbacks; > > stringCallbacks contains void (Const String &) -callback functions. > New callback functions are registered into the callback system with > registerCallback -function: > > template<class VarType> class SettingUpdater { > private: > VarType & reference; > > SettingUpdater(VarType & var) : reference(var) { } > > public: > void operator()(const String & setting) > { > // do someting irrelevant for the question here > // with the reference -variable > } > }; > > boost::signals::connection registerCallback(StringCallbacks::slot_type > callback) > { > // PROBLEM: I'd like to call the callback once without calling every > callback > // which are possibly registered already into the signal before this. > > // Register the new callback into the signal. > return stringCallbacks.get()->connect(callback); > } > > The actual usage of registerCallback: > int localVariable; > registerCallback(SettingUpdater<int>(localVariable)); > > Question: > As you might already see above, I'd like to call the callback function > once in the registerCallback function without calling every callback > already registered in the stringCallbacks signal. > I first tried something like > String param = "foo"; > callback(param); > but that won't compile. > > I also tried callback.get_slot_function()(param); > That compiles, but it won't execute the operator() -function in > SettingUpdater. > > Calling the signal will execute all callbacks registered, so the > SettingUpdater > function seems working. How I can execute the operator() function > in SettingUpdater<> inside registerCallback function by the > callback parameter passed to registerCallback function? > > Thanks in advance =) > > - Juho Mäkinen > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users

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boost::filesystem bug for win98
by Sebastien Martel 07 Jun '05

07 Jun '05

Hello, The windows implementation for find_first_file is flawed for windows 98. The problem is appending \* to the dir path: this is not supported for win98. Here is a possible fix that has been working for me quite well. inline const char * find_first_file( const char * dir, BOOST_HANDLE & handle, BOOST_SYSTEM_DIRECTORY_TYPE & data ) { // std::cout << "find_first_file " << dir << std::endl; // \* is not supported on win98 //std::string dirpath( std::string(dir) + "\\*" ); std::string dirpath( dir ); dirpath += ( dirpath.empty() || dirpath[dirpath.size()-1] != '\\' ) ? "\\*" : "*"; return ( (handle = ::FindFirstFileA( dirpath.c_str(), &data )) == BOOST_INVALID_HANDLE_VALUE ) ? 0 : data.cFileName; } -- Best regards, Sebastien mailto:smartel@real.com

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Problem with boost::signal. How to call just one slot in signal
by Juho Mäkinen 07 Jun '05

07 Jun '05

Hello. I'm having problems with boost::signal. I have a simple callback system: typedef boost::signal<void (const String &)> StringCallbacks; TSharedPtr<StringCallbacks> stringCallbacks; stringCallbacks contains void (Const String &) -callback functions. New callback functions are registered into the callback system with registerCallback -function: template<class VarType> class SettingUpdater { private: VarType & reference; SettingUpdater(VarType & var) : reference(var) { } public: void operator()(const String & setting) { // do someting irrelevant for the question here // with the reference -variable } }; boost::signals::connection registerCallback(StringCallbacks::slot_type callback) { // PROBLEM: I'd like to call the callback once without calling every callback // which are possibly registered already into the signal before this. // Register the new callback into the signal. return stringCallbacks.get()->connect(callback); } The actual usage of registerCallback: int localVariable; registerCallback(SettingUpdater<int>(localVariable)); Question: As you might already see above, I'd like to call the callback function once in the registerCallback function without calling every callback already registered in the stringCallbacks signal. I first tried something like String param = "foo"; callback(param); but that won't compile. I also tried callback.get_slot_function()(param); That compiles, but it won't execute the operator() -function in SettingUpdater. Calling the signal will execute all callbacks registered, so the SettingUpdater function seems working. How I can execute the operator() function in SettingUpdater<> inside registerCallback function by the callback parameter passed to registerCallback function? Thanks in advance =) - Juho Mäkinen

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boost::trim Am I wrong?
by Sheng QuanHu 07 Jun '05

07 Jun '05

I just write a simple test of trim: #include <string> #include <boost/algorithm/string.hpp> int main(){ using namespace std; string temp = " just test "; boost::trim(temp); return 0; } but it couldn't pass the compile, error was: [C++ Error] trim.hpp(233): E2285 Could not find a match for 'detail::trim_end(undefined,undefined,detail::is_classifiedF)' [C++ Error] trim.hpp(126): E2285 Could not find a match for 'detail::trim_begin(undefined,undefined,detail::is_classifiedF)' but when I move the "using namespace std;" out of main function: #include <string> #include <boost/algorithm/string.hpp> using namespace std; int main(){ string temp = " just test "; boost::trim(temp); return 0; } I don't know why?

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