xref: /aosp_15_r20/external/eigen/doc/snippets/Map_placement_new.cpp (revision bf2c37156dfe67e5dfebd6d394bad8b2ab5804d4)

int data[] = {1,2,3,4,5,6,7,8,9};
Map<RowVectorXi> v(data,4);
cout << "The mapped vector v is: " << v << "\n";
new (&v) Map<RowVectorXi>(data+4,5);
cout << "Now v is: " << v << "\n";