Can you provide the full code, including the #includes, and say which

version of Boost you're using, and which compiler.

- Rob.

Hello the complete code is given below. I'm using Boost 1.41.0 on VC9 and VC8. ============================================================================= #include <iostream> #include <vector> #include <string> #include <algorithm> using std::cout ; using std::endl ; #include #include namespace phx = boost::phoenix ; namespace pha = phx::arg_names ; namespace str_algo = boost::algorithm ; void trim(std::string& s) { str_algo::trim(s) ; } int main (void) { std::vectorstd::string vs ; vs.push_back (" String1 ") ; vs.push_back (" String2 ") ; vs.push_back (" String3 ") ; phx::for_each (pha::arg1, phx::lambda[ cout << pha::arg1 << '\n' ])(vs) ; cout << "===================================" << endl ; // What I'm trying to do is call boost::algorithm::trim on all elements of vector. // the below given statement works without any problem. std::for_each (vs.begin(), vs.end(), phx::bind(&trim, pha::arg1)); //How do I call boost::algorithm::trim directly using Boost.Phoenix or Boost.Lambda. Below //I'm trying to do it using phoenix. //std::for_each (vs.begin(), vs.end(), phx::bind(&str_algo::template trim, pha::_1)); phx::for_each (pha::arg1, phx::lambda[ cout << pha::arg1 << '\n' ])(vs) ; cout << "===================================" << endl ; } ===============================================================================