implicit conversion of vector from one type to another c++

Hey guys was hoping you could help me out.

I want to know if it is possible to convert a vector of one type to another implicitly

i.e some way to make this code work (obviously this is a simplified problem of what I am trying to do)

std::vector<int> intVec;
intVec.push_back(1);

std::vector<double> doubleVec = intVec;
std::vector<double> doubleVec2;
doubleVec2 = intVec;