Here I go again. This time the code is: #include #include #include #include <vector> #include <set> #include <string> #include <iostream> using boost::lambda::_1; //using boost::lambda::bind; class A { std::string s; public: A(std::string sIn):s(sIn){} void print_A() { std::cout<<"A="<5; } std::string get(){return s;} }; typedef std::vector AList; typedef std::setstd::string StrList; typedef StrList::const_iterator (StrList::* StrListFind)(const StrList::key_type&) const; typedef std::pair StrList::iterator,bool (StrList::* StrListInsert)(const StrList::value_type& _Val); StrListFind strListFind=&StrList::find; StrListInsert strListInsert=&StrList::insert; int main() { std::string in; AList alist; StrList excluded; while(in!="end") { in=""; std::getline(std::cin,in); alist.push_back(new A(in)); } std::for_each(alist.begin(),alist.end(), boost::lambda::if_then((bind(strListFind,&excluded,bind(&A::get,_1))) !=excluded.end()), bind(strListInsert,&excluded,bind(&A::get,_1))); std::for_each(alist.begin(),alist.end(), bind(&A::print_A,_1)); return 1; } The compiler output is: g++ -g -o test.exe -I/cy/f/Programs/development/boost_1_32_0/nocygwin/include/boost-1_32/ main2.cpp main2.cpp: In function `int main()': main2.cpp:50: error: no matching function for call to `if_then(const boost::lambda::lambda_functorboost::lambda::notequal_action, boost::tuples::tuple

, boost::tuples::tuplestd::string (std::setstd::string, std::allocatorstd::string >::*const)(const std::string&) const, StrList* const, const boost::lambda::lambda_functor , boost::tuples::tuple >, 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> > >, const std::_Rb_tree_const_iteratorstd::string, 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> > >)' make: *** [test.exe] Error 1

Any idea what is wrong? Thanks -- Thad