I'm a little confused on the correct way to lazily call a boost::function in a phoenix expression. For example, this doesn't do anything: namespace bp = boost::phoenix; namespace bpa = bp::arg_names; struct Foo { boost::function< void() > callback; Foo(boost::function< void() > const& callback) : callback(callback) { } }; main() { std::list< Foo > foos; foos.push_back(Foo(std::cout << bp::val(1) << '\n')); foos.push_back(Foo(std::cout << bp::val(2) << '\n')); foos.push_back(Foo(std::cout << bp::val(3) << '\n')); std::for_each( foos.begin(), foos.end(), bp::bind(&Foo::callback, bpa::arg1)); } If I wrap the bind(...) in another bind(...) it'll work, but is that the right way? I'm not binding anything, I just want the callback called. --- Aaron Wright