Add support for out of bound start and end attribute accordingly to ONNX standard.

include/aidge/operator/Slice.hpp

@@ -31,6 +31,10 @@ public:
     void forward() override;
 };
 
+// Implementation note:
+// If start or end are out of bound then it takes the max value for the given axe.
+// Example Slice with start=1, end=1000, axes=0 for tensor [0, 1, 2, 3]
+// Will return [1, 2, 3]
 enum class SliceAttr { Starts, Ends, Axes, Steps };
 
 class Slice_Op

src/operator/Slice.cpp

@@ -253,12 +253,17 @@ bool Aidge::Slice_Op::forwardDims(bool allowDataDependency) {
             const DimIdx_t axis = this->axes()[i] >= 0 ?
                             static_cast<DimIdx_t>(this->axes()[i]) :
                             static_cast<DimIdx_t>(this->axes()[i] + static_cast<DimIdx_t>(getInput(0)->nbDims()));
-            const DimSize_t start = this->starts()[i] >= 0 ?
+            DimSize_t start = this->starts()[i] >= 0 ?
                                 static_cast<DimSize_t>(this->starts()[i]) :
                                 static_cast<DimSize_t>(this->starts()[i] + static_cast<DimSize_t>(getInput(0)->dims()[axis]));
-            const DimSize_t end = this->ends()[i] >= 0 ?
+            // Clamp start to the range [0, axis_dim]
+            start = std::max(static_cast<DimSize_t>(0), std::min(start, getInput(0)->dims()[axis]-1));
+
+            DimSize_t end = this->ends()[i] >= 0 ?
                             static_cast<DimSize_t>(this->ends()[i]) :
                             static_cast<DimSize_t>(this->ends()[i] + static_cast<DimSize_t>(getInput(0)->dims()[axis]));
+            // Clamp end to the range [0, axis_dim]
+            end = std::max(static_cast<DimSize_t>(0), std::min(end, getInput(0)->dims()[axis]-1));
             const std::int64_t step = this->steps()[i];
 
             AIDGE_ASSERT(step != 0, "Slice_Op: Step ({}) must have a non-zero value on axis {}!", this->steps(), axis);
@@ -309,4 +314,4 @@ std::shared_ptr<Aidge::Node> Aidge::Slice(const std::vector<std::int64_t>& start
                                    const std::vector<std::int64_t>& steps,
                                    const std::string &name) {
     return std::make_shared<Node>(std::make_shared<Slice_Op>(starts, ends, axes, steps), name);
-}
\ No newline at end of file
+}