qiskit/qasm/qasmparser.py
def p_gate_op_1(self, program):
        """
        gate_op : CX id ',' id ';'
        """
        program[0] = node.Cnot([program[2], program[4]])
        self.verify_declared_bit(program[2])
        self.verify_declared_bit(program[4])
        self.verify_distinct([program[2], program[4]])
def p_gate_op_1(self, program):
        """
        gate_op : CX id ',' id ';'
        """
        program[0] = node.Cnot([program[2], program[4]])
        self.verify_declared_bit(program[2])
        self.verify_declared_bit(program[4])
        self.verify_distinct([program[2], program[4]])
def p_gate_op_1 ( self , program ) : program [ 0 ] = node . Cnot ( [ program [ 2 ] , program [ 4 ] ] ) self . verify_declared_bit ( program [ 2 ] ) self . verify_declared_bit ( program [ 4 ] ) self . verify_distinct ( [ program [ 2 ] , program [ 4 ] ] )
gate_op : CX id ',' id ';'
gate_op : CX id id ;