Hello, Is it possible to apply multiple adaptors to a range-base sequence? Is looks like possible for simple types: #include <string> #include <vector> #include #include #include #include #include #include using boost::assign::operator +=; #include namespace phx = boost::phoenix; int square(int val) { return val * val; } int range_test_simple() { typedef std::vector<int> V; V source; source += 1,1,1,2,2,2,3,3,3,4; using namespace boost::adaptors; V result; boost::push_back(result, source | transformed(&square)); // Ok boost::push_back(result, source | uniqued); // Ok boost::push_back(result, source | transformed(&square) | uniqued); // Ok boost::push_back(result, source | uniqued | transformed(&square)); // Ok return 0; } but how about this? (source is continued...) struct Foo { Foo(const std::string& name, int value) : name_(name), value_(value) { } std::string name_; int value_; }; typedef boost::shared_ptr<Foo> FooPtr; int range_test_complex() { typedef std::vector<FooPtr> V; V source; source += boost::make_shared<Foo>("Foo", 10), boost::make_shared<Foo>("Bar", 20), boost::make_shared<Foo>("Baz", 30), boost::make_shared<Foo>("Baz", 30) // duplicate is here ; std::vectorstd::string result1; std::vector<int> result2; using namespace boost::adaptors; using phx::arg_names::arg1; boost::push_back(result1, source | transformed(phx::bind(&Foo::name_, *arg1)) | uniqued); // Fails boost::push_back(result2, source | transformed(phx::bind(&Foo::value_, *arg1)) | uniqued); // Fails return 0; } What I'm doing wrong? I use MSVS 2010 and boost trunk. Thanks, Sam