# Copyright 2025 qBraid
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Module defining Qrisp conversions
"""
from __future__ import annotations
from typing import TYPE_CHECKING
from qbraid_core._import import LazyLoader
from qbraid.transpiler.annotations import weight
cirq = LazyLoader("cirq", globals(), "cirq")
qrisp = LazyLoader("qrisp", globals(), "qrisp")
if TYPE_CHECKING:
import qrisp as qrisp_
from cirq import Circuit
[docs]
@weight(1)
def qrisp_to_cirq(qrisp_qc: qrisp_.QuantumCircuit) -> Circuit:
"""Returns a Cirq circuit equivalent to the input Qrisp circuit.
Args:
qrisp_qc: Qrisp circuit to convert to a Cirq circuit.
Returns:
Cirq Circuit object equivalent to the input Qrisp circuit.
"""
circuit = qrisp_qc.to_cirq()
# qrisp emits extended-precision (numpy.longdouble) gate exponents, which cirq's QASM
# exporter cannot format ("Invalid format specifier 'half_turns'"). Recast them to
# plain Python float so downstream to_qasm() works.
normalized = cirq.Circuit()
for op in circuit.all_operations():
gate = op.gate
exponent = getattr(gate, "_exponent", None)
if exponent is not None and not isinstance(exponent, (int, float)):
global_shift = float(getattr(gate, "_global_shift", 0.0))
try:
gate = type(gate)(exponent=float(exponent), global_shift=global_shift)
except TypeError:
gate = type(gate)(exponent=float(exponent))
normalized.append(gate.on(*op.qubits))
return normalized