Iterate over std::vector from LUA.

Hello,

I would like to iterate over std::vector from LUA. The vector contains my 
simple class. I tryed many ways, but no success. My last simple version 
returns "No such operator defined". I tryed return_stl_iterator, but it is 
not clear for me how to use it, because my VectorOfA is typedef and not an 
other class with the member.

Can anybody help?
Thanks,
Valery.

.cpp

class A
{
    int _i;
public:
    A() : _i(0){}
    A(int i) : _i(i){}
    int get() {return _i;}
};
typedef std::vector< A > VectorOfA;

module(L)
    [
        class_<A>("A")
            .def(constructor<>())
            .def(constructor<int>())
            .def("get", &A::get),
        class_<VectorOfA>("VectorOfA")
            .def(constructor<>())
    ];

.lua

function test_iter()
    local x = VectorOfA()
    for i in x do
        print(i:get())
    end
end


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