Cherry-pick Slice_Op changes from vit_operator branch

include/aidge/operator/Slice.hpp

@@ -29,17 +29,17 @@ enum class SliceAttr { Beginning, SliceDims };
 class Slice_Op
     : public OperatorTensor,
       public Registrable<Slice_Op, std::string, std::unique_ptr<OperatorImpl>(const Slice_Op &)>,
-      public StaticAttributes<SliceAttr, std::size_t, std::vector<DimSize_t>> {
+      public StaticAttributes<SliceAttr, std::vector<std::int32_t>, std::vector<std::int32_t>, std::vector<std::int32_t>> {
 public:
     static const std::string Type;
 
     Slice_Op() = delete;
 
-    using Attributes_ = StaticAttributes<SliceAttr, std::size_t, std::vector<DimSize_t>>;
+    using Attributes_ = StaticAttributes<SliceAttr, std::vector<std::int32_t>, std::vector<std::int32_t>, std::vector<std::int32_t>>;
     template <SliceAttr e>
     using attr = typename Attributes_::template attr<e>;
 
-    Slice_Op(const std::size_t beginningPos, const std::vector<DimSize_t> sliceDims)
+    Slice_Op(const std::vector<std::int32_t>& starts, const std::vector<std::int32_t>&  ends, const std::vector<std::int32_t>& axes)
         : OperatorTensor(Type, 1, 0, 1),
           Attributes_(attr<SliceAttr::Beginning>(beginningPos),
                       attr<SliceAttr::SliceDims>(sliceDims))
@@ -107,7 +107,9 @@ public:
 };
 
 
-inline std::shared_ptr<Node> Slice(const std::size_t beginningPos, const std::vector<DimSize_t> sliceDims,
+inline std::shared_ptr<Node> Slice(const std::vector<std::int32_t> starts,
+                                   const std::vector<std::int32_t> ends,
+                                   const std::vector<std::int32_t> axes,
                                    const std::string &name = "") {
     // FIXME: properly handle default w&b initialization in every cases
     return std::make_shared<Node>(std::make_shared<Slice_Op>(beginningPos, sliceDims), name);

src/operator/Slice.cpp

@@ -12,5 +12,27 @@
 #include <string>
 
 #include "aidge/operator/Slice.hpp"
+#include "aidge/utils/Types.h"
+#include "aidge/utils/ErrorHandling.hpp"
 
-const std::string Aidge::Slice_Op::Type = "Slice";
\ No newline at end of file
+const std::string Aidge::Slice_Op::Type = "Slice";
+
+void Aidge::Slice_Op::computeOutputDims() {
+    // check input have been associated
+    if (!getInput(0) || (getInput(0)->empty())) {
+        AIDGE_THROW_OR_ABORT(std::runtime_error, "Every input should be associated with a Tensor");
+    }
+
+    DimSize_t nbAxes = this->template getAttr<SliceAttr::Axes>().size();
+    std::vector<DimSize_t> outDims = getInput(0)->dims();
+    for(std::size_t i=0; i<nbAxes;++i)
+    {
+        // For each slice operation get the params and cast them to size_t
+        std::int64_t axis_ = this->template getAttr<SliceAttr::Axes>()[i];
+        std::int64_t start_ = this->template getAttr<SliceAttr::Starts>()[i];
+        std::int64_t end_ = this->template getAttr<SliceAttr::Ends>()[i];
+        std::size_t axis = axis_>=0?axis_:axis_+getInput(0)->nbDims();
+        std::size_t start = start_>=0?start_:start_+getInput(0)->dims()[axis];
+        std::size_t end = end_>=0?end_:end_+getInput(0)->dims()[axis];
+    }
+}