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[Accumulators] Retract samples
by Alex Hagen-Zanker 06 Jan '11

06 Jan '11

Dear all, I am considering using Boost Accumulators for a moving window calculation. When a window would step from left to right, it should add the sample on the right side of the window and retract the sample on the left side on each step. For weighted accumulators, it might be possible to use negative weights. But, since the accumulators do not appear to be intended for this use, there may be implementation details that invalidate the use of negative weights. Is there a recommended way to retract samples in Boost Accumulators? Thanks, Alex p.s. the general idea: void movingwindowsum(const vector<double>& in, vector<double>& out, size_t radius ) { size_t n = in.size(); double sum = 0; // This should be an accumulator for(size_t i = 0; i < min(n, radius); ++i) { sum += in[i ]; // add sample } out.resize(n); for(size_t i = 0; i < n; ++i) { size_t left = i - radius - 1; size_t right = i + radius; if (left >= 0) sum -= in[left]; // retract sample if (right < n) sum += in[right]; // add sample out[i] = sum; }

2 5

boost::signals2 connection management
by frares＠gmail.com 06 Jan '11

06 Jan '11

Hi, all If I have one only signal that can be connected at different times to several different slots, then I create several boost::signals2::connection, one for each slot but for that same only signal, if I disconnect one of the connections, will all connections be disconnected or just that particular slot? If this is not the way to disconnect specific individual signal/slot connections, how do I do it? I have to use "boost::bind" for the connections are from signals and slots of different classes, and I cannot use scoped connections because asynchronous tasks are being performed (and signaled). Thanks Francisco

2 1

streaming of tuples - adjusting field widths?
by Christian Meesters 06 Jan '11

06 Jan '11

Hi, Having the following code (where 'out' is a std::ostream): out << boost::tuples::set_open('[') << boost::tuples::set_close(']') << boost::tuples::set_delimiter(',') << std::setw(21) << std::right << get_some_tuple(); I expected to see the tuple in a column of 21 spaces, adjusted to the right. Instead, the tuple is appended on 21 spaces. Any hint on what my mistake is? TIA Christian

2 2

regex linker issue/
by John Hendrix 06 Jan '11

06 Jan '11

Hi all, I just downloaded boost and I am attempting to create a trivial program. This my first attempt to develop boost on Fedora. Here is what I did: 1) downloaded boost_1_45_0 2) ./bootstrap.sh 3) ./bjam toolset=gcc variant=debug link=static --address-model=64 --with-regex All of these step ran uneventfully I then created a "hello world" regex program: // regex-test.cpp #include <string> #include <iostream> #include <boost/regex.hpp> int main( int argc, char * argv[] ) { // boost::regex pattern ("b.lug",boost::regex_constants::icase|boost::regex_constants::perl); std::string stringa ("Searching for bolug"); std::string replace ("BgLug"); std::string newString; // newString = boost::regex_replace (stringa, pattern, replace); printf("The new string is: |%s|\n",newString.c_str()); return 0; } To compile and link: g++ -o regex-test -I../../boost/boost_1_45_0/ -L../../boost/boost_1_45_0/stage/lib/ -lboost_regex regex-test.cpp If all of the boost::whatever code is commented-out then it compiles and links fine. [root@fc5-virt64 upstream]# g++ -o regex-test -I../../boost/boost_1_45_0/ -L../../boost/boost_1_45_0/stage/lib/ -lboost_regex regex-test.cpp [root@fc5-virt64 upstream]# ./regex-test The new string is: || [root@fc5-virt64 upstream]# However, if I, say, uncomment-out the first line of code I get: [root@fc5-virt64 upstream]# g++ -o regex-test -I../../boost/boost_1_45_0/ -L../../boost/boost_1_45_0/stage/lib/ -lboost_regex regex-test.cpp /tmp/ccDG8tmV.o: In function `boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::assign(char const*, char const*, unsigned int)': regex-test.cpp:(.text._ZN5boost11basic_regexIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE6assignEPKcS7_j[boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::assign(char const*, char const*, unsigned int)]+0x27): undefined reference to `boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::do_assign(char const*, char const*, unsigned int)' collect2: ld returned 1 exit status [root@fc5-virt64 upstream]# Does anyone have any suggestions? johnh

2 2

[ asio ] how to determine if a server is overloaded ?
by Avi Bahra 06 Jan '11

06 Jan '11

I am experimenting with boost asio & serialisation. and have created a test server based on the corresponding example in the asio tutorial. This is a simple single threaded server. The stress testing I have done, shows I get different results on different platforms. This is expected. However I need a way of determining when the server can not cope with the load. This allows me to inform the user. Currently I have used typical requests to stress test the server. This shows the server handles ~1000 requests/sec in debug under ideal conditions, on localhost. Does this means that if I continue to receive 1000/request sec over a several sec/minutes, then the server must be overloaded. Is this the right way of thinking about the problem or am I "barking up the wrong tree". Can any one provide any insights about how one goes about determining when a asio server is overloaded ? Any help appreciated. Best regards, Ta, Avi

2 1

transform_iterator::reference
by Matwey V. Kornilov 06 Jan '11

06 Jan '11

Hi, Boost 1.42.0 documentation of transfrom_iterator says: "If Reference is use_default then the reference member of transform_iterator is result_of<UnaryFunction(iterator_traits<Iterator>::reference)>::type. Otherwise, reference is Reference." But it is simply implemented as UnaryFunction::result_type; This discrepancy between documentation and implementation plays a role when I want to use transform_iterator with boost::mem_fn to access member variable of structure. mem_fn's operator() is overridden to provide both const and non-const access to member variable. The discrepancy leads to compilation error for non-const access.

2 2

[FunctionTypes] function_arity for non-built-ins
by Hossein Haeri 06 Jan '11

06 Jan '11

Dear all, How can I calculate the arity of function-objects? Obviously, function_arity won't do the job for that's only for built-ins. For instance, I need something like: function_types::function_object_arity<std::plus<double> >::value Anything in Boost for that? TIA, --Hossein

4 5

[Proto] result_of::value
by Hossein Haeri 06 Jan '11

06 Jan '11

Dear all, I have a piece of code in which contains: template<typename L, typename R> void FuncStreamCtx::operator () (tag::shift_right, const L& l, const R& r) const { evaluate_helper(l, *this); const typename result_of::value<R>::type f = value(r); } When I compile this under GCC 4.5.1 (MinGW, WinXP, SP3), I get a large spew of warnings. My related piece of code which I guess would be helpful is: double plus1(double i) {return i + 1;} double plus2(double i) {return i + 2;} struct FuncStreamCtx: callable_context<const FuncStreamCtx, null_context> { FuncStreamCtx() {} typedef void result_type; void operator () (tag::terminal, double) const; template<typename L, typename R> void operator () (tag::shift_right, const L&, const R&) const; const vector<double>& state() const {return data_;} private: void set_single_value(double) const; mutable vector<double> data_; }; template<typename Expr> const vector<double>& evaluate_helper(const Expr& e, const FuncStreamCtx& ctx) { boost::proto::eval(e, ctx); return ctx.state(); } template<typename Expr> void evaluate(const Expr& e, vector<double>& v) { const FuncStreamCtx ctx; v = evaluate_helper(e, ctx); } template<typename L, typename R> void FuncStreamCtx::operator () (tag::shift_right, const L& l, const R& r) const { evaluate_helper(l, *this); const typename result_of::value<R>::type f = value(r); } int main() { vector<double> v; evaluate(lit(51.6) >> &plus2 >> &plus2 >> &plus1, v); cout << "Result = "; copy(v.begin(), v.end(), ostream_iterator<double>(cout, " ")); return 0; } I have also included the warnings in the P.S. Any idea what the compiler is saying? And, should I do anything about it? TIA, --Hossein P.S. -------------- Build: Debug in ProtoGame3 --------------- Compiling: main.cpp D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp: In member function 'void FuncStreamCtx::operator()(boost::proto::tag::shift_right, const L&, const R&) const [with L = boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, R = boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l>]': D:\Sources\Boost\boost_1_42_0/boost/proto/context/callable.hpp:313:21: instantiated from 'boost::proto::context::callable_eval<Expr, Context, 2l>::result_type boost::proto::context::callable_eval<Expr, Context, 2l>::operator()(Expr&, Context&) const [with Expr = const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, Context = const FuncStreamCtx, boost::proto::context::callable_eval<Expr, Context, 2l>::result_type = void]' D:\Sources\Boost\boost_1_42_0/boost/proto/eval.hpp:100:62: instantiated from 'typename boost::proto::result_of::eval<Expr, Context>::type boost::proto::eval(Expr&, const Context&) [with Expr = const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, Context = FuncStreamCtx, typename boost::proto::result_of::eval<Expr, Context>::type = void]' D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:44:2: instantiated from 'const std::vector<double>& evaluate_helper(const Expr&, const FuncStreamCtx&) [with Expr = boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>]' D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:52:2: instantiated from 'void evaluate(const Expr&, std::vector<double>&) [with Expr = boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>]' D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:80:53: instantiated from here D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:74:43: warning: unused variable 'f' D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp: In member function 'void FuncStreamCtx::operator()(boost::proto::tag::shift_right, const L&, const R&) const [with L = boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, R = boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l>]': D:\Sources\Boost\boost_1_42_0/boost/proto/context/callable.hpp:313:21: instantiated from 'boost::proto::context::callable_eval<Expr, Context, 2l>::result_type boost::proto::context::callable_eval<Expr, Context, 2l>::operator()(Expr&, Context&) const [with Expr = const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, Context = const FuncStreamCtx, boost::proto::context::callable_eval<Expr, Context, 2l>::result_type = void]' D:\Sources\Boost\boost_1_42_0/boost/proto/eval.hpp:100:62: instantiated from 'typename boost::proto::result_of::eval<Expr, Context>::type boost::proto::eval(Expr&, const Context&) [with Expr = const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, Context = FuncStreamCtx, typename boost::proto::result_of::eval<Expr, Context>::type = void]' D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:44:2: instantiated from 'const std::vector<double>& evaluate_helper(const Expr&, const FuncStreamCtx&) [with Expr = boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>]' D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:73:2: instantiated from 'void FuncStreamCtx::operator()(boost::proto::tag::shift_right, const L&, const R&) const [with L = boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, R = boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l>]' D:\Sources\Boost\boost_1_42_0/boost/proto/context/callable.hpp:313:21: instantiated from 'boost::proto::context::callable_eval<Expr, Context, 2l>::result_type boost::proto::context::callable_eval<Expr, Context, 2l>::operator()(Expr&, Context&) const [with Expr = const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, Context = const FuncStreamCtx, boost::proto::context::callable_eval<Expr, Context, 2l>::result_type = void]' D:\Sources\Boost\boost_1_42_0/boost/proto/eval.hpp:100:62: instantiated from 'typename boost::proto::result_of::eval<Expr, Context>::type boost::proto::eval(Expr&, const Context&) [with Expr = const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, Context = FuncStreamCtx, typename boost::proto::result_of::eval<Expr, Context>::type = void]' D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:44:2: instantiated from 'const std::vector<double>& evaluate_helper(const Expr&, const FuncStreamCtx&) [with Expr = boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>]' D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:52:2: instantiated from 'void evaluate(const Expr&, std::vector<double>&) [with Expr = boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>]' D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:80:53: instantiated from here D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:74:43: warning: unused variable 'f' D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp: In member function 'void FuncStreamCtx::operator()(boost::proto::tag::shift_right, const L&, const R&) const [with L = boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>, R = boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l>]': D:\Sources\Boost\boost_1_42_0/boost/proto/context/callable.hpp:313:21: instantiated from 'boost::proto::context::callable_eval<Expr, Context, 2l>::result_type boost::proto::context::callable_eval<Expr, Context, 2l>::operator()(Expr&, Context&) const [with Expr = const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, Context = const FuncStreamCtx, boost::proto::context::callable_eval<Expr, Context, 2l>::result_type = void]' D:\Sources\Boost\boost_1_42_0/boost/proto/eval.hpp:100:62: instantiated from 'typename boost::proto::result_of::eval<Expr, Context>::type boost::proto::eval(Expr&, const Context&) [with Expr = const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, Context = FuncStreamCtx, typename boost::proto::result_of::eval<Expr, Context>::type = void]' D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:44:2: instantiated from 'const std::vector<double>& evaluate_helper(const Expr&, const FuncStreamCtx&) [with Expr = boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>]' D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:73:2: instantiated from 'void FuncStreamCtx::operator()(boost::proto::tag::shift_right, const L&, const R&) const [with L = boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, R = boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l>]' D:\Sources\Boost\boost_1_42_0/boost/proto/context/callable.hpp:313:21: instantiated from 'boost::proto::context::callable_eval<Expr, Context, 2l>::result_type boost::proto::context::callable_eval<Expr, Context, 2l>::operator()(Expr&, Context&) const [with Expr = const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, Context = const FuncStreamCtx, boost::proto::context::callable_eval<Expr, Context, 2l>::result_type = void]' D:\Sources\Boost\boost_1_42_0/boost/proto/eval.hpp:100:62: [ skipping 2 instantiation contexts ] D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:73:2: instantiated from 'void FuncStreamCtx::operator()(boost::proto::tag::shift_right, const L&, const R&) const [with L = boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, R = boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l>]' D:\Sources\Boost\boost_1_42_0/boost/proto/context/callable.hpp:313:21: instantiated from 'boost::proto::context::callable_eval<Expr, Context, 2l>::result_type boost::proto::context::callable_eval<Expr, Context, 2l>::operator()(Expr&, Context&) const [with Expr = const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, Context = const FuncStreamCtx, boost::proto::context::callable_eval<Expr, Context, 2l>::result_type = void]' D:\Sources\Boost\boost_1_42_0/boost/proto/eval.hpp:100:62: instantiated from 'typename boost::proto::result_of::eval<Expr, Context>::type boost::proto::eval(Expr&, const Context&) [with Expr = const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>, Context = FuncStreamCtx, typename boost::proto::result_of::eval<Expr, Context>::type = void]' D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:44:2: instantiated from 'const std::vector<double>& evaluate_helper(const Expr&, const FuncStreamCtx&) [with Expr = boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>]' D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:52:2: instantiated from 'void evaluate(const Expr&, std::vector<double>&) [with Expr = boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::exprns_::expr<boost::proto::tag::shift_right, boost::proto::argsns_::list2<const boost::proto::utility::literal<const double&, boost::proto::domainns_::default_domain>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>&, boost::proto::exprns_::expr<boost::proto::tag::terminal, boost::proto::argsns_::term<double (* const&)(double)>, 0l> >, 2l>]' D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:80:53: instantiated from here D:\My Documents\My Programmes\Tutorial\Proto\ProtoGame3\main.cpp:74:43: warning: unused variable 'f' Linking console executable: bin\Debug\ProtoGame3.exe Output size is 1.08 MB Process terminated with status 0 (0 minutes, 4 seconds) 1 errors, 3 warnings

2 4

Problems in CodeGear
by jose perez 06 Jan '11

06 Jan '11

Hello. I'm unable to compile boost in Embarcadero 2010 (CodeGear) version 0x621. My code is really simple: #include "boost/random/mersenne_twister.hpp" This produces this error: [BCC32 Error] mersenne_twister.hpp(63): E2299 Cannot generate template specialization from 'detail::disable_constructor<Engine,T>' in the line: BOOST_RANDOM_DETAIL_GENERATOR_CONSTRUCTOR(mersenne_twister, Generator, gen) { seed(gen); } I have preprocessed my .cpp in order to see if boost gets correctly self configured for CodeGear compiler. It does very well, because it enters into codegear.hpp. But the last checked version of the CodeGear compiler is 0x620, and my version is 0x621. I have tried to change this line: // versions check: // last known and checked version is 0x620 #if (__CODEGEARC__ > 0x621) and this one: // CodeGear C++ Builder 2010 #if (__CODEGEARC__ <= 0x621) / # define BOOST_NO_TYPENAME_WITH_CTOR // Cannot use typename keyword when making temporaries of a dependant type etc... so that the compiler ignores or enters those sections, but nothing changes. It seems slightly strange to me that version 0x620 and 0x621 are SO different that boost is unable to get compiled. This problem has raised when trying to compile my application with libLAS library, which uses guid.hpp (which uses mersenne_twister.hpp), and there are much more compiler errors than the one I am explaining here. I guess (and hope) they are part of the same problem. No problems arise with other boost modules like, for example, "boost/smart_ptr.hpp". Help will be appreciated. Thanks!

2 6

Why we are still using boost 1.37
by Robert Lupton the Good 06 Jan '11

06 Jan '11

>> But I'm curious to know why you are still using 1.42. Well, I'm still using 1.37 for a large astronomical software project (the LSST). To quote one of the developers: > There have been changes to boost::serialization between these two > versions that break our persistence code. The issues appear in test > segfaults for packages at the afw level and higher. We could presumably find the problem in our code (or what's changed in boost::serialization) but that's real work. It's easier to patch boost::gil 1.37 to work with gcc 4.4 (or was it 4.5)? R

2 1