diff --git a/include/aidge/operator/GenericOperator.hpp b/include/aidge/operator/GenericOperator.hpp
index 0734826580a23742183a2f7ddc36ebe46f14cb35..ba216870566a8b6f11b1c58d54da73559f8057bb 100644
--- a/include/aidge/operator/GenericOperator.hpp
+++ b/include/aidge/operator/GenericOperator.hpp
@@ -28,12 +28,15 @@ class GenericOperator_Op
     : public Operator,
       public Registrable<GenericOperator_Op, std::string, std::unique_ptr<OperatorImpl>(std::shared_ptr<GenericOperator_Op>)> {
    private:
+    using ComputeDimsFunc = std::function<std::vector<std::vector<size_t>>(const std::vector<std::vector<size_t>>&)>;
+
     CParameter mParams;
     IOIndex_t mNbDataIn;
     IOIndex_t mNbIn;
     IOIndex_t mNbOut;
     std::vector<std::shared_ptr<Tensor>> mInputs;
     std::vector<std::shared_ptr<Tensor>> mOutputs;
+    ComputeDimsFunc mComputeOutputDims;
 
    public:
     GenericOperator_Op(const char *type, IOIndex_t nbDataIn, IOIndex_t nbIn, IOIndex_t nbOut)
@@ -106,23 +109,55 @@ class GenericOperator_Op
         mParams.Add<T>(key, value);
     }
 
+    // Helper functions that can be used with setComputeOutputDims():
+    static const ComputeDimsFunc Identity;
+
+    void setComputeOutputDims(ComputeDimsFunc func) {
+        mComputeOutputDims = func;
+    }
 
     std::string getParameterType(std::string const &key) { return mParams.getParamType(key); }
 
     std::vector<std::string> getParametersName() { return mParams.getParametersName(); }
 
     // Override Virtual Opertor methods
-    void associateInput(const IOIndex_t /*inputIdx*/, std::shared_ptr<Data> /*data*/) override final {
-        printf("Info: using associateInput() on a GenericOperator.\n");
+    void associateInput(const IOIndex_t inputIdx, std::shared_ptr<Data> data) override final {
+        assert(inputIdx < mNbIn && "operators supports only x inputs");
+
+        if (strcmp(data->type(), Tensor::Type) == 0) {
+            // TODO: associate input only if of type Tensor, otherwise do nothing
+            mInputs[inputIdx] = std::dynamic_pointer_cast<Tensor>(data);
+        }
     }
 
     void computeOutputDims() override final {
-        assert(false && "Cannot compute output dim of a GenericOperator");
+        if (mComputeOutputDims) {
+            std::vector<std::vector<size_t>> inputsDims(mNbIn, std::vector<size_t>());
+            for (std::size_t i = 0; i < mNbIn; ++i) {
+                if (mInputs[i]) {
+                    inputsDims[i] = mInputs[i]->dims();
+                }
+            }
+
+            const auto& outputsDims = mComputeOutputDims(inputsDims);
+            assert(outputsDims.size() == mNbOut && "The provided ComputeDimsFunc function returns the wrong number of outputs");
+            for (std::size_t i = 0; i < mNbOut; ++i) {
+                mOutputs[i]->resize(outputsDims[i]);
+            }
+        }
+        else {
+            assert(false && "Cannot compute output dim of a GenericOperator");
+        }
     }
 
     bool outputDimsForwarded() const override final {
-        assert(false && "GenericOperator cannot forward dims");
-        return false;
+        if (mComputeOutputDims) {
+            return !(mOutputs[0]->empty());
+        }
+        else {            
+            assert(false && "GenericOperator cannot forward dims");
+            return false;
+        }
     }
 
     std::shared_ptr<Data> getRawInput(const IOIndex_t inputIdx) const override final {
diff --git a/src/operator/GenericOperator.cpp b/src/operator/GenericOperator.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..192036651cfbe2df71139dd63ca3d71f07300964
--- /dev/null
+++ b/src/operator/GenericOperator.cpp
@@ -0,0 +1,17 @@
+/********************************************************************************
+ * Copyright (c) 2023 CEA-List
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ ********************************************************************************/
+
+#include <vector>
+
+#include "aidge/operator/GenericOperator.hpp"
+
+const Aidge::GenericOperator_Op::ComputeDimsFunc Aidge::GenericOperator_Op::Identity
+    = [](const std::vector<std::vector<size_t>>& inputsDims) { return inputsDims; };