support input and/or attribute for reshape

include/aidge/operator/Reshape.hpp

@@ -45,7 +45,7 @@ public:
     using attr = typename Attributes_::template attr<e>;
 
     Reshape_Op(const std::vector<std::int64_t>& shape)
-        : OperatorTensor(Type, 1, 0, 1),
+        : OperatorTensor(Type, 2, 0, 1),
           Attributes_(attr<ReshapeAttr::Shape>(shape))
     {
         mImpl = std::make_shared<Reshape_OpImpl>(*this);
@@ -87,7 +87,7 @@ public:
     }
 };
 
-inline std::shared_ptr<Node> Reshape(const std::vector<std::int64_t>& shape,
+inline std::shared_ptr<Node> Reshape(const std::vector<std::int64_t>& shape = {},
                                    		const std::string &name = "") {
     // FIXME: properly handle default w&b initialization in every cases
     return std::make_shared<Node>(std::make_shared<Reshape_Op>(shape), name);

python_binding/operator/pybind_Reshape.cpp

@@ -23,6 +23,6 @@ void init_Reshape(py::module& m) {
     .def("get_inputs_name", &Reshape_Op::getInputsName)
     .def("get_outputs_name", &Reshape_Op::getOutputsName);
     declare_registrable<Reshape_Op>(m, "ReshapeOp");
-    m.def("Reshape", &Reshape, py::arg("shape"), py::arg("name") = "");
+    m.def("Reshape", &Reshape, py::arg("shape") = std::vector<std::int64_t>(), py::arg("name") = "");
 }
 }  // namespace Aidge

src/operator/Reshape.cpp

@@ -43,6 +43,42 @@ bool Aidge::Reshape_Op::forwardDims(bool /*allowDataDependency*/) {
         std::size_t outSize = 1;
         DimIdx_t negativeIndex = 0;
 
+
+        if (this->template getAttr<ReshapeAttr::Shape>().empty() && getInput(1)) {
+            if(!getInput(1)->empty()) {
+                this->template getAttr<ReshapeAttr::Shape>().reserve(getInput(1)->size());
+                // Fill shape attr
+                switch (mInputs[1]->dataType()) {
+                    case DataType::Float64:
+                        std::copy_n(static_cast<double*>(mInputs[1]->getImpl()->rawPtr()),
+                                    getInput(1)->size(),
+                                    std::back_inserter(this->template getAttr<ReshapeAttr::Shape>()));
+                        break;
+                    case DataType::Float32:
+                        std::copy_n(static_cast<float*>(mInputs[1]->getImpl()->rawPtr()),
+                                    getInput(1)->size(),
+                                    std::back_inserter(this->template getAttr<ReshapeAttr::Shape>()));
+                        break;
+                    case DataType::Int64:
+                        std::copy_n(static_cast<std::int64_t*>(mInputs[1]->getImpl()->rawPtr()),
+                                    getInput(1)->size(),
+                                    std::back_inserter(this->template getAttr<ReshapeAttr::Shape>()));
+                        break;
+                    case DataType::Int32:
+                        std::copy_n(static_cast<std::int32_t*>(mInputs[1]->getImpl()->rawPtr()),
+                                    getInput(1)->size(),
+                                    std::back_inserter(this->template getAttr<ReshapeAttr::Shape>()));
+                        break;
+                    default:
+                        AIDGE_THROW_OR_ABORT(std::runtime_error, "Shape input DataType is not supported.");
+                        break;
+                }
+            }
+            else {
+                AIDGE_THROW_OR_ABORT(std::runtime_error, "Shape attribute or Input is needed");
+            }
+        }
+
         for(std::size_t i = 0; i < this->template getAttr<ReshapeAttr::Shape>().size(); ++i)
         {
             std::int64_t dimSize = this->template getAttr<ReshapeAttr::Shape>()[i];