Add qml.to_openqasm transform

pennylane/__init__.py

@@ -128,6 +128,7 @@
     pattern_matching_optimization,
     clifford_t_decomposition,
     add_noise,
+    to_openqasm,
 )
 from pennylane.ops.functions import (
     dot,

pennylane/transforms/__init__.py

@@ -307,6 +307,7 @@ def circuit(params):
 from .split_to_single_terms import split_to_single_terms
 from .insert_ops import insert
 from .combine_global_phases import combine_global_phases
+from .openqasm import to_openqasm
 
 from .mitigate import (
     mitigate_with_zne,

pennylane/transforms/openqasm.py

@@ -0,0 +1,26 @@
+# Copyright 2018-2024 Xanadu Quantum Technologies Inc.
+
+# 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.
+
+"""
+Provides a transform to get the OpenQASM 2.0 program corresponding to a given QNode.
+"""
+
+from pennylane import workflow
+
+
+def to_openqasm(qnode, *args, **kwargs) -> str:
+    """TODO"""
+    tape = workflow.construct_tape(qnode)(*args, **kwargs)
+    qasm = tape.to_openqasm(*args, **kwargs)
+    return qasm