On 11/29/06, "JOAQUIN LOPEZ MU?Z" <joaquin@tid.es> wrote: First, thank you for your response.
std::cerr << "Value: " << (l::bind(&test_b::f, l::_1))(boost::ref(td)) << "\n";
Well, I tried putting ref on the other side but this works...my way didn't. Now I would need to find how to use this solution for my original problem when td is actually a shared_ptr to an abstract base: boost::shared_ptr<test_b> td = boost::shared_ptr<test_b>(new test_d); This does not work: l::bind(l::bind(&test_b::f, l::_1), boost::ref(*l::_1))(td) Unlike boost::bind, lambda::bind doesn't work like this: l::bind(&test_b::f, l::_1)(td) This does but can't be used in an algorithm on a container holding smart pointers: l::bind(&test_b::f, l::_1)(boost::ref(*td)) Interestingly, boost::bind has an operator == that will allow me to compare the result of f() to a value just fine...I thought I needed lambda for this. Boost::bind doesn't suffer from an inability to work directly with smart pointers and doesn't require special magic to use them vs. raw vs. non-ptr. So my original problem is solved by tossing lambda out the airlock but it might be worthwhile to find a way to accomplish a smart pointer member call with lambda for the future. So in the end, my problem is thus: std::find_if(cont.begin(), cont.end(), bind(&deref_val_type::f, _1) == 5); How is that accomplished with lambda if cont holds smart pointers? So far I haven't found any way...