Extract elements from a vector of object

Question

Given a vector of objects, is there an elegant way to extract its member? I am currently just using a for loop but it would be nice if there is a way to do it. Example:

#include <vector>

struct Object {
  int x;
  float y;
};

int main() {
  std::vector<Object> obj;
  // Fill up obj

  std::vector<int> all_x = obj.x; // Won't work obviously
}

Answer 1

With range-v3, it would simply be

std::vector<int> xs = objs | ranges::view::transform(&Object::x);

or just use the view:

auto xs = objs | ranges::view::transform(&Object::x);

Demo