View Compilation Error

0_0_36810802_4495.cpp: In function 'void Solve()':
0_0_36810802_4495.cpp:145:18: error: expected unqualified-id before '[' token
             auto [l, r] = getTangentCoP(A, x);// cerr << "  " << l << " " << r << endl;
                  ^
0_0_36810802_4495.cpp:146:26: error: 'l' was not declared in this scope
             point pl = A[l]; pl.id = l, pl.type = 0;
                          ^
0_0_36810802_4495.cpp:147:26: error: 'r' was not declared in this scope
             point pr = A[r]; pr.id = r, pr.type = 0;
                          ^