Fixed incorrect MetaOperator copy constructor and clone() method

include/aidge/operator/MetaOperator.hpp

@@ -69,10 +69,7 @@ public:
      * 
      * @param op The operator to copy.
      */
-    MetaOperator_Op(const MetaOperator_Op& op)
-        : OperatorTensor(op),
-          mGraph(op.mGraph->clone()) // Clone the micro-graph for isolation
-    {}
+    MetaOperator_Op(const MetaOperator_Op& op);
 
     /**
      * @brief Set the node for scheduling.

src/operator/MetaOperator.cpp

@@ -54,8 +54,28 @@ Aidge::MetaOperator_Op::MetaOperator_Op(const std::string& type, const std::shar
     }
 }
 
+Aidge::MetaOperator_Op::MetaOperator_Op(const MetaOperator_Op& op)
+    : OperatorTensor(op),
+        mGraph(op.mGraph->clone()), // Clone the micro-graph for isolation
+        mAttributes(std::make_shared<DynamicAttributes>(*op.mAttributes)) // Clone attributes
+{
+    // Associate outputs to micro-graph outputs for custom implementation
+    for (size_t outputIdx = 0; outputIdx < mOutputs.size(); ++outputIdx) {
+        const auto& outputOp = mGraph->getOrderedOutputs()[outputIdx];
+        if (outputOp.first) {
+            mOutputs[outputIdx] = std::dynamic_pointer_cast<Tensor>(outputOp.first->getOperator()->getRawOutput(outputOp.second));
+        }
+    }
+
+    // Attributes are already cloned.
+}
+
 std::shared_ptr<Aidge::Operator> Aidge::MetaOperator_Op::clone() const {
-    return std::make_shared<MetaOperator_Op>(type(), mGraph->clone());
+    auto metaOp = std::make_shared<MetaOperator_Op>(*this);
+    if (mImpl) {
+        metaOp->setBackend(mImpl->backend());
+    }
+    return metaOp;
 }
 
 void Aidge::MetaOperator_Op::associateInput(const IOIndex_t inputIdx, const std::shared_ptr<Data>& data) {