Hi All Can anyone tell me what's wrong with this? The error message is so huge I'm a bit overwhelmed! I suspect type deduction is failing, but none of my efforts to correct it have worked. Thx, Rob. #include <boost/phoenix/bind.hpp> #include <boost/phoenix/bind/bind_function_object.hpp> #include <boost/phoenix/core.hpp> #include <boost/phoenix/operator.hpp> #include <boost/range/adaptor/adjacent_filtered.hpp> #include <boost/range/algorithm/for_each.hpp> void f( const double & ) { } template <class Compare> void sorted( Compare cmp ) { using boost::adaptors::adjacent_filtered; using boost::phoenix::arg_names::_1; using boost::phoenix::arg_names::_2; std::vector<double> input = { 0.0, 1.0, 2.0, 3.0, 4.0 }; // Ok for_each( input | adjacent_filtered( cmp ) , f ); // Not Ok for_each( input | adjacent_filtered( bind( cmp, _1, _2 ) ) , f ); } int main( ) { sorted( std::less<double>( ) ); }