Make some arguments const for data flow functions

include/aidge/backend/OperatorImpl.hpp

@@ -29,10 +29,10 @@ public:
      * @param inputIdx Index of the input analysed.
      * @return std::size_t
      */
-    virtual NbElts_t getNbRequiredData(IOIndex_t inputIdx) const = 0;
+    virtual NbElts_t getNbRequiredData(const IOIndex_t inputIdx) const = 0;
 
     // Amount of input data that cannot be overwritten during the execution.
-    virtual NbElts_t getNbRequiredProtected(IOIndex_t inputIdx) const = 0;
+    virtual NbElts_t getNbRequiredProtected(const IOIndex_t inputIdx) const = 0;
 
     // Memory required at an output for a given input size.
     virtual NbElts_t getRequiredMemory(const IOIndex_t outputIdx, const std::vector<DimSize_t> &inputsSize) const = 0;
@@ -43,7 +43,7 @@ public:
      * @param inputIdx Index of the input analysed.
      * @return DimSize_t
      */
-    virtual NbElts_t getNbConsumedData(IOIndex_t inputIdx) const = 0;
+    virtual NbElts_t getNbConsumedData(const IOIndex_t inputIdx) const = 0;
 
     /**
      * @brief TOtal amount of produced data ready to be used on a specific output.
@@ -51,7 +51,7 @@ public:
      * @param outputIdx Index of the output analysed.
      * @return DimSize_t
      */
-    virtual NbElts_t getNbProducedData(IOIndex_t outputIdx) const = 0;
+    virtual NbElts_t getNbProducedData(const IOIndex_t outputIdx) const = 0;
 
     virtual ~OperatorImpl() = default;
 };

include/aidge/operator/Operator.hpp

@@ -60,7 +60,7 @@ public:
      * @param inputIdx Index of the input analysed.
      * @return NbElts_t 
      */
-    NbElts_t getNbRequiredData(IOIndex_t inputIdx) const;
+    NbElts_t getNbRequiredData(const IOIndex_t inputIdx) const;
 
     /**
      * @brief Amount of data from a specific input actually used in one computation pass.
@@ -68,7 +68,7 @@ public:
      * @param inputIdx Index of the input analysed.
      * @return NbElts_t 
      */
-    NbElts_t getNbConsumedData(IOIndex_t inputIdx) const;
+    NbElts_t getNbConsumedData(const IOIndex_t inputIdx) const;
 
     /**
      * @brief Amount of data ready to be used on a specific output.
@@ -76,7 +76,7 @@ public:
      * @param outputIdx Index of the output analysed.
      * @return NbElts_t 
      */
-    NbElts_t getNbProducedData(IOIndex_t outputIdx) const;
+    NbElts_t getNbProducedData(const IOIndex_t outputIdx) const;
 
     virtual void forward();