OPENQASM 3.0;
include "stdgates.inc";
// From the example's text: two qubit arguments and one allocated; custom X, H, CX (control first, as its name says) and Rx.
qubit[3] q;
x q[0];
h q[1];
cx q[2], q[0];
cx q[1], q[2];
rx(0.5) q[0];