[Add] DepthToSpace Operator

Add feature specified in #140 (closed)

• Core operator
• unit_test forwardDims()
• unit_test impl forward()

include/aidge/operator/DepthToSpace.hpp

+/********************************************************************************
+ * 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
+ *
+ ********************************************************************************/
+
+#ifndef AIDGE_CORE_OPERATOR_DEPTHTOSPACE_H_
+#define AIDGE_CORE_OPERATOR_DEPTHTOSPACE_H_
+
+#include <array>
+#include <memory>
+#include <vector>
+
+#include "aidge/graph/Node.hpp"
+#include "aidge/operator/OperatorTensor.hpp"
+#include "aidge/utils/Registrar.hpp"
+#include "aidge/utils/StaticAttributes.hpp"
+#include "aidge/utils/Types.h"
+
+namespace Aidge {
+class DepthToSpace_OpImpl : public OperatorImpl {
+public:
+    DepthToSpace_OpImpl(const Operator& op, const std::string& backend = ""): OperatorImpl(op, backend) {}
+    void forward() override;
+};
+
+enum class DepthToSpaceAttr { BlockSize, Mode };
+
+
+class DepthToSpace_Op : public OperatorTensor,
+                public Registrable<DepthToSpace_Op,
+                    std::string,
+                    std::shared_ptr<OperatorImpl>(const DepthToSpace_Op &)> {
+public:
+    static const std::string Type;
+    enum class Mode { DCR, CRD };
+
+private:
+    using Attributes_ = StaticAttributes<DepthToSpaceAttr, std::uint32_t, Mode>;
+    template <DepthToSpaceAttr e>
+    using attr = typename Attributes_::template attr<e>;
+    const std::shared_ptr<Attributes_> mAttributes;
+
+public:
+
+    DepthToSpace_Op() = delete;
+
+    DepthToSpace_Op(const std::uint32_t blockSize, const Mode mode = Mode::CRD);
+
+    /**
+     * @brief Copy-constructor. Copy the operator attributes and its output tensor(s),
+     * but not its input tensors (the new operator has no input associated).
+     * @param op Operator to copy.
+     */
+    DepthToSpace_Op(const DepthToSpace_Op& op);
+
+    /**
+     * @brief Clone the operator using its copy-constructor.
+     * @see Operator::DepthToSpace_Op
+     */
+    std::shared_ptr<Operator> clone() const override;
+
+    bool forwardDims(bool /*allowDataDependency*/ = false) override final;
+
+    void setBackend(const std::string &name, DeviceIdx_t device = 0) override final;
+
+    inline std::shared_ptr<Attributes> attributes() const override { return mAttributes; }
+    inline std::uint32_t& blockSize() const { return mAttributes->template getAttr<DepthToSpaceAttr::BlockSize>(); }
+    inline Mode& mode() const { return mAttributes->template getAttr<DepthToSpaceAttr::Mode>(); }
+
+    static const std::vector<std::string> getInputsName() {
+        return {"data_input"};
+    }
+    static const std::vector<std::string> getOutputsName() {
+        return {"data_output"};
+    }
+};
+
+std::shared_ptr<Node> DepthToSpace(const std::uint32_t blockSize,
+                                    const DepthToSpace_Op::Mode mode = DepthToSpace_Op::Mode::CRD,
+                                    const std::string& name = "");
+
+}  // namespace Aidge
+
+namespace {
+template <>
+const char *const EnumStrings<Aidge::DepthToSpaceAttr>::data[] = { "block_size", "mode" };
+}
+
+#endif //AIDGE_CORE_OPERATOR_DEPTHTOSPACE_H_