Merge pull request #385 from arcondello/feature/libcpp-nodes

Break libcpp.nodes into a subpackage

Author: arcondello

dwave/optimization/libcpp/graph.pxd

@@ -37,12 +37,8 @@ cdef extern from "dwave-optimization/graph.hpp" namespace "dwave::optimization"
     cdef cppclass DecisionNode(Node):
         pass
 
-# This would usually be defined in nodes.pxd, but we need it for Graph.inputs() so to
-# avoid the circular dependency we define it here.
-cdef extern from "dwave-optimization/nodes/inputs.hpp" namespace "dwave::optimization" nogil:
-    cdef cppclass InputNode(ArrayNode):
-        const double* buff() const
-        void initialize_state(State&, span[const double] data) except+
+# Must come after the declaration of ArrayNode to avoid circular imports
+from dwave.optimization.libcpp.nodes.inputs cimport InputNode
 
 # Sometimes Cython isn't able to reason about pointers as template inputs, so
 # we make a few aliases for convenience

dwave/optimization/libcpp/nodes.pxd

@@ -0,0 +1,34 @@
+# Copyright 2025 D-Wave
+#
+#    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.
+
+from dwave.optimization.libcpp.nodes.binaryop cimport *
+from dwave.optimization.libcpp.nodes.collections cimport *
+from dwave.optimization.libcpp.nodes.constants cimport *
+from dwave.optimization.libcpp.nodes.creation cimport *
+from dwave.optimization.libcpp.nodes.flow cimport *
+from dwave.optimization.libcpp.nodes.indexing cimport *
+from dwave.optimization.libcpp.nodes.inputs cimport *
+from dwave.optimization.libcpp.nodes.interpolation cimport *
+from dwave.optimization.libcpp.nodes.lambda_ cimport *
+from dwave.optimization.libcpp.nodes.lp cimport *
+from dwave.optimization.libcpp.nodes.manipulation cimport *
+from dwave.optimization.libcpp.nodes.naryop cimport *
+from dwave.optimization.libcpp.nodes.numbers cimport *
+from dwave.optimization.libcpp.nodes.quadratic_model cimport *
+from dwave.optimization.libcpp.nodes.reduce cimport *
+from dwave.optimization.libcpp.nodes.softmax cimport *
+from dwave.optimization.libcpp.nodes.sorting cimport *
+from dwave.optimization.libcpp.nodes.statistics cimport *
+from dwave.optimization.libcpp.nodes.testing cimport *
+from dwave.optimization.libcpp.nodes.unaryop cimport *