delay not recognized by qasm parser

[Zhaoyilunnn]

Test file

OPENQASM 2.0;
include "qelib1.inc";
qreg q[3];
creg meas[3];
ry(0.6283185307179586) q[2];
delay(300) q[2];
ry(-0.6283185307179586) q[2];
measure q[2]->meas[0];

Test code

OPENQASM 2.0;
include "qelib1.inc";
qreg q[3];
creg meas[3];
ry(0.6283185307179586) q[2];
delay(300) q[2];
ry(-0.6283185307179586) q[2];
measure q[2]->c[0]
(quafu-dev) root@dell:~/projects/forks/pyquafu# cat test.py
from quafu import QuantumCircuit

qc = QuantumCircuit(1)

with open("./test.qasm", "r") as f:
    qc.from_openqasm(f.read())

Error

Traceback (most recent call last):
  File "/root/projects/forks/pyquafu/test.py", line 6, in <module>
    qc.from_openqasm(f.read())
  File "/root/projects/forks/pyquafu/quafu/circuits/quantum_circuit.py", line 499, in from_openqasm
    return qasm2_to_quafu_qc(self, openqasm)
  File "/root/projects/forks/pyquafu/quafu/qfasm/qfasm_convertor.py", line 47, in qasm2_to_quafu_qc
    newqc = qparser.parse(openqasm)
  File "/root/projects/forks/pyquafu/quafu/qfasm/qfasm_parser.py", line 114, in parse
    self.parser.parse(data, lexer=self.lexer, debug=debug)
  File "/root/anaconda3/envs/quafu-dev/lib/python3.10/site-packages/ply/yacc.py", line 333, in parse
    return self.parseopt_notrack(input, lexer, debug, tracking, tokenfunc)
  File "/root/anaconda3/envs/quafu-dev/lib/python3.10/site-packages/ply/yacc.py", line 1120, in parseopt_notrack
    p.callable(pslice)
  File "/root/projects/forks/pyquafu/quafu/qfasm/qfasm_parser.py", line 701, in p_unitaryop
    self.check_qargs(p[0])
  File "/root/projects/forks/pyquafu/quafu/qfasm/qfasm_parser.py", line 396, in check_qargs
    raise ParserError(
quafu.qfasm.exceptions.ParserError: The gate delay is undefined at line 6 file None