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Multi Array problem
by Robert Ramey 27 Apr '06

27 Apr '06

I have a problem what is demonstrated in the attached file. Basically I have the following create multi_array - a1 create a view on the multiarray which has the same number of dimensions a1_view a1 == a1_view fails to compile. The attached example illustrates this. In the example I verify that both a1 and a1_view fullfill the requirements for Multi Array. The documentation states that in order for a type to be a model of the Multi Array concept. The operations a == b must be valid. Actually the documentation could be considered ambiguous on this point. But that is was I get from a plain reading of the document and from a common sense interpretation. If two types meeting the requirements of the Multi Array concept have the same number of dimensions, I expect to be able to compare them as this is natural operation to perform and implement. Robert Ramey begin 666 test_misc.cpp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` ` end

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shared_ptr and RTTI?
by Foster Brereton 27 Apr '06

27 Apr '06

Hi all, I have this request from a colleague. Can anyone help me shed some light on his issue?: > I did not use the boost::shared_ptr in quite some time and I was > surprised to find out that, more recently, the shared_ptr _requires_ > RTTI to be enabled. I did some reading on the websites and groups and > while I admit that the new version is more flexible, powerful, etc, I > would have thought that they also left a switch in for the old behavior > which did not require RTTI. In some projects, RTTI does not add any > benefits and people obviously turn it off. > > Is anybody aware of such a "switch" that will allow somebody to use > boost::shared_ptr without RTTI? Blessings, Foster -- Foster T. Brereton - Computer Scientist Software Technology Lab, Adobe Systems Incorporated fbrereto(a)adobe.com -- http://opensource.adobe.com

2 1

Using boost::lambda::bind with std::transform
by Kobi Cohen-Arazi 27 Apr '06

27 Apr '06

Hi, Would like to do the following with boost::lambda::bind #include <boost/lambda/lambda.hpp> #include <boost/lambda/bind.hpp> #include <algorithm> using namespace boost::lambda; struct Foo{ std::string get(){ ... } }; std::vector<Foo> array; // say it is already populated std::vector<std::string> tr; // the transformed instead using my handcrafted for loop, I would like to transform the std::list<Foo>::iterator endIter=array.end (); for (std::list<Foo>::iterator iter=array.begin(); iter!=endIter ;++iter) { noExtResults.push_back (iter.get().replace (0,5, "")); } I know it should be something like: std::transform (array.begin(), array.end (), std::back_inserter(tr), bind(&Foo::get, _1)); So here I'm stuck. The bind function will know to extract the string using get. But how to I get that string and do something like: bind(&std::string::replace (???)) Thanks in advance for your kind help, Kobi.

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[algorithm - strings] problems with borland c++ 6
by Federico Feller 27 Apr '06

27 Apr '06

Hi, Im having problems using the string algorithm of boost with Borland C++ 6.0. Precisely, I cant compile the sequence.cpp because of the following error: [C++ Error] sequence.hpp(186): E2285 Could not find a match for 'boost::algorithm::detail::replace<InputT,ForwardIteratorT>(StringE,char *,char *,undefined,undefined)' Iam using std::string for string algorithms. Any ideas? Thanks, Federico __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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[checked_delete] pimpl with scoped_ptr<T>
by Herve Alexanian 27 Apr '06

27 Apr '06

Hello, This is my first post regarding boost, I hope I am sending it to the right list. I have a question regarding the use of scoped_ptr versus shared_ptr: I am trying to use scoped_ptr<Impl> to implement the "Pimpl" idiom in order to hide the Impl definition from the user. Since my class is not copyable I thought using a scoped_ptr was better suited than a shared_ptr. So, something like this: class Impl; class MyClass { scoped_ptr<Impl> m_pImpl; ... ... }; When compiling client code, I see a checked_delete error. Reading the blurb about checked_delete this makes sense to me and I am able to work around the error by putting an explicit destructor declaration in MyClass. But, I don't see any error if I use a smart_ptr instead of a scoped_ptr. Why is the requirement about not deleting an incomplete type any different between scoped_ptr and shared_ptr? Thanks, Herve Alexanian Sonics, inc.

1 0

[mpl] no result_type defined
by Frank Birbacher 27 Apr '06

27 Apr '06

Hi! I want to create a container of pointers to objects in a range (first,last(. I tried to use mpl, but have been without success. I understand, that the lambda "&_1" cannot specify its concrete return type, so I added ret<T>(...). But the resulting lambda is rejected by the make_transform_iterator function. I'm using boost 1.33.0 on gcc 4.0.2 //****** CODE BEGIN ****** #include <vector> #include <iterator> #include <boost/iterator/transform_iterator.hpp> #include <boost/lambda/lambda.hpp> template<typename Iterator> void foo(Iterator first, Iterator last) { using boost::make_transform_iterator; using namespace boost::lambda; typedef typename std::iterator_traits<Iterator>::pointer Pointer; std::vector<Pointer> objectPointers( make_transform_iterator(first, ret<Pointer>(&_1)), make_transform_iterator(last, ret<Pointer>(&_1)) ); // ... } int main() { std::vector<int> v; //instantiate template: foo(v.begin(), v.end()); } //***** CODE END ****** // ** ERROR on GCC 4.0.2: ** /mnt/daten/develop/boost/boost/iterator/transform_iterator.hpp:43: Fehler: kein Typ namens »result_type« in »class boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::explicit_return_type_action<int*>, boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::addressof_action>, boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >« The error says it cannot find the type "result_type" in "class ....". What is wrong here? Frank

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[BGL] How to build graphviz with MS VC8?
by Rui Carvalho 27 Apr '06

27 Apr '06

Hi, I'm trying to build graphviz so as to be able to use read_graphviz in the boost graph library. My understanding is that the make file in Boost 1_33_1\boost_1_33_1\libs\graph\src is not yet ready for VC -but I may be missing something obvious here. Is there a simple way to compile the graphviz library with VC? Thanks, Rui

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Boost::program_options - Linking Issue
by Adam Hartshorne 27 Apr '06

27 Apr '06

Using the following command lines on a linux box, g++ -c -pipe -Wall -W -O2 -pipe -m64 -fexceptions -D_REENTRANT -DQT_NO_DEBUG -DQT_THREAD_SUPPORT -DQT_SHARED -I/usr/lib64/qt-3.3/mkspecs/default -I. -Idcs/improc2/adam/boost_1_33_1/ -I/usr/lib64/qt-3.3/include -I.moc/ -o .obj/first.o first.cpp g++ -o cmdLineTest .obj/first.o -L/usr/lib64/qt-3.3/lib -L/usr/X11R6/lib64 -L/dcs/improc2/adam/boost_1_33_1/stage/lib/ -lboost_program_options-gcc -lqt-mt -lXext -lX11 -lm -lpthread I get the following error output when trying to compile the first.cpp example provided with the library .obj/first.o(.text+0x57): In function `main': : undefined reference to `boost::program_options::options_description::options_description(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' .obj/first.o(.gnu.linkonce.t._ZNK5boost15program_options25basic_command_line_parserIcE3runEv+0x5): In function `boost::program_options::basic_command_line_parser<char>::run() const': : undefined reference to `boost::program_options::common_command_line_parser::run() const' .obj/first.o(.gnu.linkonce.t._ZN5boost15program_options25basic_command_line_parserIcEC1EiPPc+0x42): In function `boost::program_options::basic_command_line_parser<char>::basic_command_line_parser(int, char**)': : undefined reference to `boost::program_options::common_command_line_parser::common_command_line_parser(std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&)' And help would be greatly appreciated, Adam

2 1

[1.33.1][mpl] increasing BOOST_MPL_LIMIT_LIST_SIZE doesn't work
by Marc Mutz 27 Apr '06

27 Apr '06

Hi, According to the mpl docs, defining above macro to e.g. 30 should make boost::mpl::list<> take 30 template arguments, and thus enable boost::variant<> to hold 21 different types (default: 20 on my platform (gcc 4.0)). Yet compiling the attached sample program gives me attached error message, which indicates that mpl::list<> still takes only 20 template parameters. Bug? Thanks, Marc -- Marc Mutz -- marc(a)klaralvdalens-datakonsult.se, mutz(a)kde.org Klarälvdalens Datakonsult AB, Platform-independent software solutions

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I/O bug in date_time
by Thomas Lemaire 27 Apr '06

27 Apr '06

Dear list, I encounter a bug while reading a time_duration object, here is a short test case, the results are obtained with boost 1.33.1, gcc4.0.3 using namespace boost::posix_time; time_duration td1(0,0,0); std::stringstream ss1("14:23:11.345678"); ss1 >> td1; std::cout << td1 << std::endl; // 14:23:11.345678 time_duration td2(0,0,0); std::stringstream ss2("18353:23:11.345678"); ss2 >> td2; std::cout << td2 << std::endl; // 18:53:23 time_duration td3(0,0,0); std::stringstream ss3("318353:23:11.345678"); ss3 >> td3; std::cout << td3 << std::endl; // 00:00:00 If I compile with the flag CPPFLAGS += -DUSE_DATE_TIME_PRE_1_33_FACET_IO this is working well. I hope this will help to fix it... -- thomas http://www.laas.fr/~tlemaire

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