qiskit/qasm/qasmparser.py
def p_gate_op_3(self, program):
        """
        gate_op : id '(' ')' id_list ';'
        """
        program[0] = node.CustomUnitary([program[1], program[4]])
        self.verify_as_gate(program[1], program[4])
        self.verify_bit_list(program[4])
        self.verify_distinct([program[4]])
def p_gate_op_3(self, program):
        """
        gate_op : id '(' ')' id_list ';'
        """
        program[0] = node.CustomUnitary([program[1], program[4]])
        self.verify_as_gate(program[1], program[4])
        self.verify_bit_list(program[4])
        self.verify_distinct([program[4]])
gate_op : id '(' ')' id_list ';'