January 2010 - Boost - lists.boost.org

Proto Help
by David A. Greene 02 Jan '10

02 Jan '10

I am trying to use proto to generate an IR for a custom language. I've got basic expressions working and am moving on to generate the statements of the custom language I'm working on getting "if" statements generated. I've attached a compilable testcase. I can't seem to get the grammar+transforms to work for the IfRule. Am I on the right track? What am I missing? Thanks. -Dave

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bcp update #2: namespace renaming
by John Maddock 02 Jan '10

02 Jan '10

OK, since folks keep asking for it, bcp will now do namespace renaming, the two new options are: --namespace=newname Renames namespace boost to "newname" in all the source files copied. Also changes library names to start with the prefix "newname" or "libnewname" rather than "boost" or "libboost". --namespace-alias Makes namespace boost an alias for the new name. Using these two options you can get "strong versioning" with two different boost installs coexisting side by side (in the same application if necessary). What you can not do at present, is #include two different boost versions in the same translation unit. This update is in, and tested against, SVN Trunk only at present. Enjoy, John.

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Can any one help me with this fstream
by ch.asad＠gmail.com 02 Jan '10

02 Jan '10

Hi i am new to boost. i have written a code. can any one guide me whats the issue with this code. It gives an error when I assign the File pointer to a Global poiter. " h_file = file; h_str = str; " Can any one guide me whats the issue with this and how cna i solve this issue. thanks, Asad // Accelor-test.cpp : Defines the entry point for the console application. // #include <iostream> #include <string> #include <fstream> #include <string> #include <vector> #include <iostream> #include <iterator> #include <functional> #include <boost/asio.hpp> #include <boost/algorithm/string/classification.hpp> #include <boost/algorithm/string/split.hpp> #include <boost/algorithm/string/find_iterator.hpp> #include <boost/thread/thread.hpp> using boost::asio::ip::tcp; using namespace std; using namespace boost; std::fstream h_file; int hb; int cnt; tcp::iostream h_str; //boost::mutex mutex; void Accelor_test() { std::cout<<"\nAPP started ...\n"; char ver[100]; char s1[100]; vector<std::string> strng,st,u_p; //int ef; h_str.read(ver,sizeof(ver)); std::cout<<" INBOUND : Version read : " <<ver<<std::endl; h_file.getline(s1,sizeof(s1)); std::cout<<s1<<std::endl; } void send_HB() { std::cout<<"\nHeart Beat Started..."; // boost::mutex::scoped_lock lock(mutex); char h_b[] = "HB\n"; for(;;) { boost::xtime xt; boost::xtime_get(&xt, boost::TIME_UTC); xt.sec += 1; h_str.write(h_b,sizeof(h_b)); boost::thread::sleep(xt); std::cout <<"OUTBOUND : HB ,"<< ++cnt << std::endl; } } int main(int argc, char* argv[]) { std::fstream file = std::fstream("inttest_sample.csv",std::fstream::in); if(h_file == NULL) { std::cout<<"File not found"; } char s1[100]; vector<std::string> conf,connection,u_p; int ef; h_file.getline(s1,sizeof(s1)); std::cout<<"s1 = "<<s1<<endl; std::cout<<"Split Conf"; split(conf, s1, is_any_of(","), token_compress_on); split(connection, conf[0], is_any_of(":"), token_compress_on); tcp::iostream str(connection[0],connection[1]); h_file = file; h_str = str; boost::thread thrd_hb(&send_HB); boost::thread thrd_acc(&Accelor_test); thrd_hb.join(); thrd_acc.join(); file.close(); str.close(); //std::cout<<"kjdshkjf"; } -- View this message in context: http://old.nabble.com/Can-any-one-help-me-with-this-fstream-tp26986763p2698… Sent from the Boost - Dev mailing list archive at Nabble.com.

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[any] New feature idea for boost.any
by Andres B. 01 Jan '10

01 Jan '10

Hello, i am Andrés, i am new in the boost world and i have an idea to boost.any. With the actual boost::any i can't do this: boost::any any_var; int i; any_var = 10; i = 1 + any_var; double d; // d = 1.0 + any_var; // throw: bad_any_cast, because any_var is int any_var = 10.0; d = 1.0 + any_var - 3.0; // now any_var is double because are incompatible types. To solve this problem, we need add the casting operator and add overload the global operators. I wrote the code and actually have the global operators overloaded +, -, *, /, %. I don't know how write code to Boost, for this reason maybe has errors. namespase boost { class any { //.... public: // casting operators template <class ValueType> operator ValueType () const { return boost::any_cast<ValueType>(*this); } template <class ValueType> operator ValueType () { return boost::any_cast<ValueType>(*this); } // arithmetic operators template <typename ValueType> ValueType operator+ (const ValueType& t1) const { return (ValueType)(*this) + t1; } template <typename ValueType> ValueType operator- (const ValueType& t1) const { return (ValueType)(*this) - t1; } template <typename ValueType> ValueType operator* (const ValueType& t1) const { return (ValueType)(*this) * t1; } template <typename ValueType> ValueType operator/ (const ValueType& t1) const { return (ValueType)(*this) / t1; } template <typename ValueType> ValueType operator% (const ValueType& t1) const { return (ValueType)(*this) % t1; } //... } // End any //... // Global operators template <class ValueType> ValueType operator+ (ValueType t1, boost::any t2) { return t1 + (ValueType)(t2); } template <class ValueType> ValueType operator- (ValueType t1, boost::any t2) { return t1 - (ValueType)(t2); } template <class ValueType> ValueType operator* (ValueType t1, boost::any t2) { return t1 * (ValueType)(t2); } template <class ValueType> ValueType operator/ (ValueType t1, boost::any t2) { return t1 - (ValueType)(t2); } template <class ValueType> ValueType operator% (ValueType t1, boost::any t2) { return t1 % (ValueType)(t2); } } If you like it or not, please tell me. Excuse my English

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