#include <triqs/arrays.hpp>
using triqs::arrays::array;
namespace tql = triqs::clef;

int main() {
 tql::placeholder<0> i_;
 tql::placeholder<1> j_;
 array<double, 2> A(2, 2);
 A(i_, j_) << i_ + j_;
 std::cout << "A = " << A << std::endl;
}