- Boost-users - lists.preview.boost.org

Re: [Boost-users] [1.33][ptr_container] bug in erase() inassociativecontainers?
by JOAQUIN LOPEZ MU?Z 24 Aug '05

24 Aug '05

----- Mensaje original ----- De: Thorsten Ottosen <nesotto(a)cs.aau.dk> Fecha: Martes, Agosto 23, 2005 11:22 pm Asunto: Re: [Boost-users] [1.33][ptr_container] bug in erase() inassociativecontainers? [...] > > > > size_type erase( const key_type& x ) // nothrow > > { > > BOOST_ASSERT( !this->empty() ); > > iterator i = find( x ); // nothrow > > if( i == this->end() ) // nothrow > > return 0; // nothrow > > this->remove( i ); // nothrow > > return this->c_private().erase( i.base() ); // nothrow > > } Why the BOOST_ASSERT? Do you require that the container be non-empty for erase to be callable? Am I missing something? Joaquín M López Muñoz Telefónica, Investigación y Desarrollo

2 1

program_options range checking?
by Fredrik Hedman 24 Aug '05

24 Aug '05

Hello, I would like to be able to specify different sanity checks on the input data using the program_options framework. This should be a common enough requirement, but I can not find any example that exactly fits the bill. To be more specific I have a solution that kind of works, but I think it needs a bit to much typing. Here is what I have now: /*! Check for values greater than min. */ template <typename T> class value_gt { public: value_gt(std::string const & msg, T min) : msg_(msg), min_(min) {} void operator()(T const & v) const { if (v > min_) return; ostringstream os; os << msg_ << " to small. Must be larger than " << min_ << " . Found " << v; throw pgmopt::invalid_option_value(os.str()); } private: std::string msg_; T min_; }; void doSetProgram(Options & options) { options.add_options() ("help,h", "show this message") ("density", pgmopt::value<double>()->notifier( value_gt<double>("density", 1.0)), "initial density") ("particles", pgmopt::value<unsigned>()->notifier( value_gt<unsigned>("particles", 100)), "number of particles") ; } I don't like repeating the type (see code above) and would rather like to have access to the name of the option in the function that does the check. What would be a better solution? Adding to the validators idea or? -- F.

2 2

[bjam] [v1] How to copy the generated binaries from a dependent project?
by Ames Andreas 24 Aug '05

24 Aug '05

Hi, I'm using some of boost's libs in my own projects. Therefore I like to build certain (sub)variants of these libraries from the according library subdirectories to avoid the (quite large) overhead when building from the toplevel boost directory with the --with-<lib> option. Take Boost.Signals as an example. When I build in boost/libs/signals/build using bjam, the subproject (not only signals) seems not to support the stage target so that the resulting binary/ies are build somewhere in boost/bin. Now I would like to create a Jamfile outside the boost source tree which does two things: 1) it builds selected (sub)variants of boost_signals, perhaps using some accordingly named NOTFILE targets, 2) it let's me copy the resulting binary/ies (i.e. libs and dlls) to a specified directory. Unfortunately I seem not to be able to figure out how to do this with bjam, especially how to get the full path of the built binary/ies. I would really like to avoid hardcoding these paths. So any help is appreciated. TIA, aa -- Andreas Ames | Programmer | Comergo GmbH | Voice: +49 69 7505 3213 | andreas . ames AT comergo . com

3 2

[bjam] [v1] Minor issue with vc-7_1
by Ames Andreas 24 Aug '05

24 Aug '05

Hi, when I use bjam -sTOOLS=vc-7_1 "-sBUILD=debug <debug-store>database" lib I get LNK4044 linker warning because the /PDB command line switch is not supported (but ignored) for archive targets. I suppose the vc-Archive action in msvc-tools.jam shouldn't use PDB_LINKFLAG because I can't see why it should be needed. cheers, aa -- Andreas Ames | Programmer | Comergo GmbH | Voice: +49 69 7505 3213 | andreas . ames AT comergo . com

1 0

Re: [Boost-users] regex_replace with file streams
by louis 24 Aug '05

24 Aug '05

Thanks for the help. My platform is Win32 and I was able to create a class: class mystring: public std::iterator<std::bidirectional_iterator_tag, char > mystring class opens the input file and maps it into memory using: CreateFileMapping MapViewOfFile and I pass this into regex_replace. It seems to work - any thoughts? Thanks again Louis > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of John Maddock > Sent: Tuesday, August 23, 2005 11:08 AM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] regex_replace with file streams > >>I want to use regex_replace to operate on a potentially large input >>file and output the results to another file. So, I can't load the >>entire file into a buffer in memory and pass it in as is done in the >>examples. I can't seem to figure out how to pass fstream or some other >>file I/O into regex_replace (ie create the proper iterator). > > Take a look at the second example in > http://www.boost.org/libs/regex/doc/partial_matches.html > > Unfortunately if you want to do a search and replace in an "infinite" text, > then you're not going to be able to use regex_replace. Instead you'll have > to enumerate through the matches and copy unmatched sections to output, and > then call match_results::format on matched sections to get the text to > output for that section. > > HTH, John. > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

2 1

program_options and lib64
by Philippe Després 24 Aug '05

24 Aug '05

Hello, I am using linux gcc 4.01, boost-1.33 on an amd 64 machine. I use program_options to retrieve a string from a config file but get a crash like this when I notify(): Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 46912541228512 (LWP 12633)] 0x00002aaaab14d2eb in std::string::assign () from /usr/lib64/libstdc++.so.6 (gdb) bt #0 0x00002aaaab14d2eb in std::string::assign () from /usr/lib64/libstdc++.so.6 #1 0x0000000000427689 in boost::program_options::typed_value<std::string, char>::notify (this=0x5de300, value_store=@0x5e1a48) at value_semantic.hpp:32 #2 0x00002aaaaafa50c9 in boost::program_options::notify () from /usr/local/lib/libboost_program_options-gcc-1_33.so.1.33.0 Is there known uncompatibilities between boost/gcc4/lib64 ?? Thank you, -- Philippe Després Associate Specialist UCSF Physics Research Lab 185 Berry Street suite 350 San Francisco CA 94107 (415) 353-4501 PGP PUBLIC KEY http://itsa.ucsf.edu/~despres/publickey.txt

3 2

Re: [Boost-users] [BULK] Re: [BULK] Re: [Test] redirecting unit test report
by Sohail Somani 23 Aug '05

23 Aug '05

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of > Gennadiy Rozental > Sent: Tuesday, August 23, 2005 1:40 PM > To: boost-users(a)lists.boost.org > Subject: [BULK] Re: [Boost-users] [BULK] Re: [Test] > redirecting unit test report > Importance: Low > > Because instances of global_fixure aren't supposed to be > destructed through > abstract pointer. Which is reinforced by protected destructor. Ah. I had a suspicion of this. > > All this could be avoided if you go the route of > BOOST_ASSERT in that > > you can define hooks via some free standing functions. > > What could be avoided and how an alternative would look like? I was thinking of avoiding the need for classes. But since context was snipped I went back and read over the thread again and it seems that you need classes.

1 0

Re: [Boost-users] [BULK] Re: [Test] redirecting unit test report
by Sohail Somani 23 Aug '05

23 Aug '05

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of > Gennadiy Rozental > Sent: Monday, August 22, 2005 10:26 PM > To: boost-users(a)lists.boost.org > Subject: [BULK] Re: [Boost-users] [Test] redirecting unit test report > Importance: Low > > #include <iostream> > > class global_fixure { > public: > global_fixure() { pointer() = this; } > virtual void setup() = 0; > virtual void teardown() = 0; > > static global_fixure*& pointer() { static global_fixure* > p = 0; return > p; } > > protected: > ~global_fixure() {} > }; Why isnt the destructor virtual? Is it because you will never have an instance of this class? What happens if delete a_global_fixture; is called? [snipped some stuff] All this could be avoided if you go the route of BOOST_ASSERT in that you can define hooks via some free standing functions.

2 1

Another iostreams question
by Lisa Glendenning 23 Aug '05

23 Aug '05

Is it possible to do something like template <typename T> T* Access(int n) { return chain.component<n, T>(); } because my compiler (GCC) doesn't like it. And if not, then how can I access a component without knowing at compile time its index?

3 2

regex_replace with file streams
by louis 23 Aug '05

23 Aug '05

Hi, I am new to the boost library, STL and template programming.. I want to use regex_replace to operate on a potentially large input file and output the results to another file. So, I can't load the entire file into a buffer in memory and pass it in as is done in the examples. I can't seem to figure out how to pass fstream or some other file I/O into regex_replace (ie create the proper iterator). Any help would be greatly appreciated. Louis

2 1