[Add] clone function to Scaling

include/aidge/operator/Scaling.hpp

@@ -55,6 +55,27 @@ public:
         setDatatype(DataType::Float32);
     }
 
+    /**
+     * @brief Copy-constructor. Copy the operator parameters and its output tensor(s), but not its input tensors (the new operator has no input associated).
+     * @param op Operator to copy.
+     */
+    Scaling_Op(const Scaling_Op& op)
+        : Operator(Type),
+          Parameterizable_(op),
+          mOutput(std::make_shared<Tensor>(*op.mOutput))
+    {
+        // cpy-ctor
+        setDatatype(op.mOutput->dataType());
+    }
+
+    /**
+     * @brief Clone the operator using its copy-constructor.
+     * @see Operator::Scaling_Op
+     */
+    std::shared_ptr<Operator> clone() const override {
+        return std::make_shared<Scaling_Op>(*this);
+    }
+
     void associateInput(const IOIndex_t inputIdx, std::shared_ptr<Data> data) override final {
         assert(inputIdx == 0 && "operator supports only 1 input");
         assert(strcmp(data->type(), Tensor::Type)==0 && "input data must be of Tensor type");
@@ -84,7 +105,7 @@ public:
     }
 
 
-    inline std::shared_ptr<Tensor> getInput(const IOIndex_t inputIdx) const override final { 
+    inline std::shared_ptr<Tensor> getInput(const IOIndex_t inputIdx) const override final {
         assert((inputIdx == 0) && "Scaling Operator has only 1 input");
         (void) inputIdx; // avoid unused warning
         return mInput;