I'm trying to figure out how to do something like this: for_each(c.begin(), c.end(), cout << _1.member << "\n"); which is obviously wrong, but hopefully you know what I mean... Experimenting with ways of accessing members inside a lambda, I wrote the following: #include <iostream> #include <boost/lambda/lambda.hpp> #include <vector> using namespace std; using namespace boost; using namespace lambda; struct XX { XX(int a, int b) { a_ = a; b_ = b; } int a_; int b_; }; int main() { XX xx(5, 6); XX *xxp = &xx; cout << "These should all be equivalent:\n"; cout << xxp ->* &XX::a_ << endl; cout << (_1 ->* &XX::a_)(xxp) << endl; //cout << (_1 ->* &XX::a_)(&xx) << endl; // Doesn't compile! cout << (&_1 ->* &XX::a_)(xx) << endl; cout << "Now, let's try with the vector:\n"; vector<XX> xxVec; xxVec.push_back(XX(3, 4)); cout << (&_1 ->* &XX::a_)(xxVec[0]) << endl; //cout << (_1 ->* &XX::a_)(&xxVec[0]) << endl; // Doesn't compile! cout << (_1 ->* &XX::a_)(xxp = &xxVec[0]) << endl; // Now it compiles... //cout << (_1 ->* &XX::a_)(xxVec.begin()) << endl; // Doesn't compile! //cout << (_1 ->* &XX::a_)(&*xxVec.begin()) << endl; // Still not... cout << (_1 ->* &XX::a_)(xxp = &*xxVec.begin()) << endl; // Now it compiles... exit(0); } I'm mystified by why some of these lines don't compile (gcc 3.2.2). Can anyone explain it? The compiler generates some horrific error messages -- I haven't tried to pick through them yet... - Chuck